mirror of
https://github.com/AsahiLinux/u-boot
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afc3ba0fc4
NULL is an absolute value and should not be relocated.
After this correction code like:
void weak_fun(void) __attribute__((weak));
printf("weak_fun:%p\n", weak_fun);
will still print null after relocation.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
2196 lines
61 KiB
ArmAsm
2196 lines
61 KiB
ArmAsm
/*
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* Copyright (C) 1998 Dan Malek <dmalek@jlc.net>
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* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
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* Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de>
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* Copyright (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
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* Copyright (c) 2008 Nuovation System Designs, LLC
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* Grant Erickson <gerickson@nuovations.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*------------------------------------------------------------------------------+
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* This source code is dual-licensed. You may use it under the terms of the
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* GNU General Public License version 2, or under the license below.
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*
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* This source code has been made available to you by IBM on an AS-IS
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* basis. Anyone receiving this source is licensed under IBM
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* copyrights to use it in any way he or she deems fit, including
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* copying it, modifying it, compiling it, and redistributing it either
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* with or without modifications. No license under IBM patents or
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* patent applications is to be implied by the copyright license.
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*
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* Any user of this software should understand that IBM cannot provide
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* technical support for this software and will not be responsible for
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* any consequences resulting from the use of this software.
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*
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* Any person who transfers this source code or any derivative work
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* must include the IBM copyright notice, this paragraph, and the
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* preceding two paragraphs in the transferred software.
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*
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* COPYRIGHT I B M CORPORATION 1995
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* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
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*-------------------------------------------------------------------------------
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*/
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/* U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards
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*
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*
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* The processor starts at 0xfffffffc and the code is executed
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* from flash/rom.
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* in memory, but as long we don't jump around before relocating.
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* board_init lies at a quite high address and when the cpu has
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* jumped there, everything is ok.
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* This works because the cpu gives the FLASH (CS0) the whole
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* address space at startup, and board_init lies as a echo of
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* the flash somewhere up there in the memorymap.
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*
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* board_init will change CS0 to be positioned at the correct
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* address and (s)dram will be positioned at address 0
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*/
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#include <config.h>
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#include <ppc4xx.h>
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#include <timestamp.h>
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#include <version.h>
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#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
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#include <ppc_asm.tmpl>
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#include <ppc_defs.h>
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#include <asm/cache.h>
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#include <asm/mmu.h>
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#include <asm/ppc4xx-isram.h>
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#ifndef CONFIG_IDENT_STRING
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#define CONFIG_IDENT_STRING ""
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#endif
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#ifdef CONFIG_SYS_INIT_DCACHE_CS
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# if (CONFIG_SYS_INIT_DCACHE_CS == 0)
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# define PBxAP PB1AP
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# define PBxCR PB0CR
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# if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 1)
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# define PBxAP PB1AP
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# define PBxCR PB1CR
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# if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 2)
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# define PBxAP PB2AP
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# define PBxCR PB2CR
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# if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 3)
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# define PBxAP PB3AP
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# define PBxCR PB3CR
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# if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 4)
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# define PBxAP PB4AP
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# define PBxCR PB4CR
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# if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 5)
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# define PBxAP PB5AP
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# define PBxCR PB5CR
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# if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 6)
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# define PBxAP PB6AP
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# define PBxCR PB6CR
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# if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
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# endif
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# endif
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# if (CONFIG_SYS_INIT_DCACHE_CS == 7)
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# define PBxAP PB7AP
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# define PBxCR PB7CR
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# if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
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# define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
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# define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
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# endif
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# endif
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# ifndef PBxAP_VAL
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# define PBxAP_VAL 0
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# endif
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# ifndef PBxCR_VAL
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# define PBxCR_VAL 0
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# endif
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/*
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* Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
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* used as temporary stack pointer for the primordial stack
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*/
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# ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
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# define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
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EBC_BXAP_TWT_ENCODE(7) | \
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EBC_BXAP_BCE_DISABLE | \
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EBC_BXAP_BCT_2TRANS | \
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EBC_BXAP_CSN_ENCODE(0) | \
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EBC_BXAP_OEN_ENCODE(0) | \
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EBC_BXAP_WBN_ENCODE(0) | \
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EBC_BXAP_WBF_ENCODE(0) | \
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EBC_BXAP_TH_ENCODE(2) | \
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EBC_BXAP_RE_DISABLED | \
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EBC_BXAP_SOR_NONDELAYED | \
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EBC_BXAP_BEM_WRITEONLY | \
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EBC_BXAP_PEN_DISABLED)
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# endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
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# ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
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# define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
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EBC_BXCR_BS_64MB | \
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EBC_BXCR_BU_RW | \
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EBC_BXCR_BW_16BIT)
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# endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
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# ifndef CONFIG_SYS_INIT_RAM_PATTERN
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# define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
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# endif
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#endif /* CONFIG_SYS_INIT_DCACHE_CS */
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#if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_END > (4 << 10)))
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#error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_END!
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#endif
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/*
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* Unless otherwise overriden, enable two 128MB cachable instruction regions
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* at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
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* NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
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*/
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#if !defined(CONFIG_SYS_FLASH_BASE)
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/* If not already defined, set it to the "last" 128MByte region */
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# define CONFIG_SYS_FLASH_BASE 0xf8000000
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#endif
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#if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
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# define CONFIG_SYS_ICACHE_SACR_VALUE \
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(PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
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PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
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PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
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#endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
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#if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
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# define CONFIG_SYS_DCACHE_SACR_VALUE \
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(0x00000000)
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#endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
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#define function_prolog(func_name) .text; \
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.align 2; \
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.globl func_name; \
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func_name:
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#define function_epilog(func_name) .type func_name,@function; \
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.size func_name,.-func_name
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/* We don't want the MMU yet.
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*/
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#undef MSR_KERNEL
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#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
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.extern ext_bus_cntlr_init
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#ifdef CONFIG_NAND_U_BOOT
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.extern reconfig_tlb0
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#endif
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/*
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* Set up GOT: Global Offset Table
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*
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* Use r14 to access the GOT
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*/
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#if !defined(CONFIG_NAND_SPL)
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START_GOT
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GOT_ENTRY(_GOT2_TABLE_)
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GOT_ENTRY(_FIXUP_TABLE_)
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GOT_ENTRY(_start)
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GOT_ENTRY(_start_of_vectors)
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GOT_ENTRY(_end_of_vectors)
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GOT_ENTRY(transfer_to_handler)
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GOT_ENTRY(__init_end)
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GOT_ENTRY(_end)
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GOT_ENTRY(__bss_start)
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END_GOT
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#endif /* CONFIG_NAND_SPL */
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#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
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/*
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* NAND U-Boot image is started from offset 0
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*/
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.text
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#if defined(CONFIG_440)
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bl reconfig_tlb0
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#endif
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GET_GOT
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bl cpu_init_f /* run low-level CPU init code (from Flash) */
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bl board_init_f
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#endif
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#if defined(CONFIG_SYS_RAMBOOT)
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/*
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* 4xx RAM-booting U-Boot image is started from offset 0
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*/
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.text
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bl _start_440
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#endif
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/*
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* 440 Startup -- on reset only the top 4k of the effective
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* address space is mapped in by an entry in the instruction
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* and data shadow TLB. The .bootpg section is located in the
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* top 4k & does only what's necessary to map in the the rest
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* of the boot rom. Once the boot rom is mapped in we can
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* proceed with normal startup.
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*
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* NOTE: CS0 only covers the top 2MB of the effective address
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* space after reset.
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*/
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#if defined(CONFIG_440)
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#if !defined(CONFIG_NAND_SPL)
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.section .bootpg,"ax"
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#endif
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.globl _start_440
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/**************************************************************************/
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_start_440:
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/*--------------------------------------------------------------------+
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| 440EPX BUP Change - Hardware team request
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+--------------------------------------------------------------------*/
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#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
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sync
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nop
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nop
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#endif
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/*----------------------------------------------------------------+
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| Core bug fix. Clear the esr
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+-----------------------------------------------------------------*/
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li r0,0
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mtspr SPRN_ESR,r0
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/*----------------------------------------------------------------*/
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/* Clear and set up some registers. */
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/*----------------------------------------------------------------*/
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iccci r0,r0 /* NOTE: operands not used for 440 */
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dccci r0,r0 /* NOTE: operands not used for 440 */
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sync
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li r0,0
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mtspr SPRN_SRR0,r0
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mtspr SPRN_SRR1,r0
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mtspr SPRN_CSRR0,r0
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mtspr SPRN_CSRR1,r0
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/* NOTE: 440GX adds machine check status regs */
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#if defined(CONFIG_440) && !defined(CONFIG_440GP)
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mtspr SPRN_MCSRR0,r0
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mtspr SPRN_MCSRR1,r0
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mfspr r1,SPRN_MCSR
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mtspr SPRN_MCSR,r1
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#endif
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/*----------------------------------------------------------------*/
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/* CCR0 init */
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/*----------------------------------------------------------------*/
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/* Disable store gathering & broadcast, guarantee inst/data
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* cache block touch, force load/store alignment
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* (see errata 1.12: 440_33)
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*/
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lis r1,0x0030 /* store gathering & broadcast disable */
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ori r1,r1,0x6000 /* cache touch */
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mtspr SPRN_CCR0,r1
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/*----------------------------------------------------------------*/
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/* Initialize debug */
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/*----------------------------------------------------------------*/
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mfspr r1,SPRN_DBCR0
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andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
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bne skip_debug_init /* if set, don't clear debug register */
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mtspr SPRN_DBCR0,r0
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mtspr SPRN_DBCR1,r0
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mtspr SPRN_DBCR2,r0
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mtspr SPRN_IAC1,r0
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mtspr SPRN_IAC2,r0
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mtspr SPRN_IAC3,r0
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mtspr SPRN_DAC1,r0
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mtspr SPRN_DAC2,r0
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mtspr SPRN_DVC1,r0
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mtspr SPRN_DVC2,r0
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mfspr r1,SPRN_DBSR
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mtspr SPRN_DBSR,r1 /* Clear all valid bits */
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skip_debug_init:
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#if defined (CONFIG_440SPE)
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/*----------------------------------------------------------------+
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| Initialize Core Configuration Reg1.
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| a. ICDPEI: Record even parity. Normal operation.
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| b. ICTPEI: Record even parity. Normal operation.
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| c. DCTPEI: Record even parity. Normal operation.
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| d. DCDPEI: Record even parity. Normal operation.
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| e. DCUPEI: Record even parity. Normal operation.
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| f. DCMPEI: Record even parity. Normal operation.
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| g. FCOM: Normal operation
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| h. MMUPEI: Record even parity. Normal operation.
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| i. FFF: Flush only as much data as necessary.
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| j. TCS: Timebase increments from CPU clock.
|
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+-----------------------------------------------------------------*/
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li r0,0
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mtspr SPRN_CCR1, r0
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|
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/*----------------------------------------------------------------+
|
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| Reset the timebase.
|
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| The previous write to CCR1 sets the timebase source.
|
|
+-----------------------------------------------------------------*/
|
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mtspr SPRN_TBWL, r0
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mtspr SPRN_TBWU, r0
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#endif
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Setup interrupt vectors */
|
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/*----------------------------------------------------------------*/
|
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mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */
|
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li r1,0x0100
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mtspr SPRN_IVOR0,r1 /* Critical input */
|
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li r1,0x0200
|
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mtspr SPRN_IVOR1,r1 /* Machine check */
|
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li r1,0x0300
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mtspr SPRN_IVOR2,r1 /* Data storage */
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li r1,0x0400
|
|
mtspr SPRN_IVOR3,r1 /* Instruction storage */
|
|
li r1,0x0500
|
|
mtspr SPRN_IVOR4,r1 /* External interrupt */
|
|
li r1,0x0600
|
|
mtspr SPRN_IVOR5,r1 /* Alignment */
|
|
li r1,0x0700
|
|
mtspr SPRN_IVOR6,r1 /* Program check */
|
|
li r1,0x0800
|
|
mtspr SPRN_IVOR7,r1 /* Floating point unavailable */
|
|
li r1,0x0c00
|
|
mtspr SPRN_IVOR8,r1 /* System call */
|
|
li r1,0x0a00
|
|
mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */
|
|
li r1,0x0900
|
|
mtspr SPRN_IVOR10,r1 /* Decrementer */
|
|
li r1,0x1300
|
|
mtspr SPRN_IVOR13,r1 /* Data TLB error */
|
|
li r1,0x1400
|
|
mtspr SPRN_IVOR14,r1 /* Instr TLB error */
|
|
li r1,0x2000
|
|
mtspr SPRN_IVOR15,r1 /* Debug */
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Configure cache regions */
|
|
/*----------------------------------------------------------------*/
|
|
mtspr SPRN_INV0,r0
|
|
mtspr SPRN_INV1,r0
|
|
mtspr SPRN_INV2,r0
|
|
mtspr SPRN_INV3,r0
|
|
mtspr SPRN_DNV0,r0
|
|
mtspr SPRN_DNV1,r0
|
|
mtspr SPRN_DNV2,r0
|
|
mtspr SPRN_DNV3,r0
|
|
mtspr SPRN_ITV0,r0
|
|
mtspr SPRN_ITV1,r0
|
|
mtspr SPRN_ITV2,r0
|
|
mtspr SPRN_ITV3,r0
|
|
mtspr SPRN_DTV0,r0
|
|
mtspr SPRN_DTV1,r0
|
|
mtspr SPRN_DTV2,r0
|
|
mtspr SPRN_DTV3,r0
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Cache victim limits */
|
|
/*----------------------------------------------------------------*/
|
|
/* floors 0, ceiling max to use the entire cache -- nothing locked
|
|
*/
|
|
lis r1,0x0001
|
|
ori r1,r1,0xf800
|
|
mtspr SPRN_IVLIM,r1
|
|
mtspr SPRN_DVLIM,r1
|
|
|
|
/*----------------------------------------------------------------+
|
|
|Initialize MMUCR[STID] = 0.
|
|
+-----------------------------------------------------------------*/
|
|
mfspr r0,SPRN_MMUCR
|
|
addis r1,0,0xFFFF
|
|
ori r1,r1,0xFF00
|
|
and r0,r0,r1
|
|
mtspr SPRN_MMUCR,r0
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Clear all TLB entries -- TID = 0, TS = 0 */
|
|
/*----------------------------------------------------------------*/
|
|
addis r0,0,0x0000
|
|
#ifdef CONFIG_SYS_RAMBOOT
|
|
li r4,0 /* Start with TLB #0 */
|
|
#else
|
|
li r4,1 /* Start with TLB #1 */
|
|
#endif
|
|
li r1,64 /* 64 TLB entries */
|
|
sub r1,r1,r4 /* calculate last TLB # */
|
|
mtctr r1
|
|
rsttlb:
|
|
#ifdef CONFIG_SYS_RAMBOOT
|
|
tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */
|
|
rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */
|
|
beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */
|
|
#endif
|
|
tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/
|
|
tlbwe r0,r4,1
|
|
tlbwe r0,r4,2
|
|
tlbnxt: addi r4,r4,1 /* Next TLB */
|
|
bdnz rsttlb
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* TLB entry setup -- step thru tlbtab */
|
|
/*----------------------------------------------------------------*/
|
|
#if defined(CONFIG_440SPE)
|
|
/*----------------------------------------------------------------*/
|
|
/* We have different TLB tables for revA and rev B of 440SPe */
|
|
/*----------------------------------------------------------------*/
|
|
mfspr r1, PVR
|
|
lis r0,0x5342
|
|
ori r0,r0,0x1891
|
|
cmpw r7,r1,r0
|
|
bne r7,..revA
|
|
bl tlbtabB
|
|
b ..goon
|
|
..revA:
|
|
bl tlbtabA
|
|
..goon:
|
|
#else
|
|
bl tlbtab /* Get tlbtab pointer */
|
|
#endif
|
|
mr r5,r0
|
|
li r1,0x003f /* 64 TLB entries max */
|
|
mtctr r1
|
|
li r4,0 /* TLB # */
|
|
|
|
addi r5,r5,-4
|
|
1:
|
|
#ifdef CONFIG_SYS_RAMBOOT
|
|
tlbre r3,r4,0 /* Read contents from TLB word #0 */
|
|
rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */
|
|
bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */
|
|
#endif
|
|
lwzu r0,4(r5)
|
|
cmpwi r0,0
|
|
beq 2f /* 0 marks end */
|
|
lwzu r1,4(r5)
|
|
lwzu r2,4(r5)
|
|
tlbwe r0,r4,0 /* TLB Word 0 */
|
|
tlbwe r1,r4,1 /* TLB Word 1 */
|
|
tlbwe r2,r4,2 /* TLB Word 2 */
|
|
tlbnx2: addi r4,r4,1 /* Next TLB */
|
|
bdnz 1b
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Continue from 'normal' start */
|
|
/*----------------------------------------------------------------*/
|
|
2:
|
|
bl 3f
|
|
b _start
|
|
|
|
3: li r0,0
|
|
mtspr SPRN_SRR1,r0 /* Keep things disabled for now */
|
|
mflr r1
|
|
mtspr SPRN_SRR0,r1
|
|
rfi
|
|
#endif /* CONFIG_440 */
|
|
|
|
/*
|
|
* r3 - 1st arg to board_init(): IMMP pointer
|
|
* r4 - 2nd arg to board_init(): boot flag
|
|
*/
|
|
#ifndef CONFIG_NAND_SPL
|
|
.text
|
|
.long 0x27051956 /* U-Boot Magic Number */
|
|
.globl version_string
|
|
version_string:
|
|
.ascii U_BOOT_VERSION
|
|
.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
|
|
.ascii CONFIG_IDENT_STRING, "\0"
|
|
|
|
. = EXC_OFF_SYS_RESET
|
|
.globl _start_of_vectors
|
|
_start_of_vectors:
|
|
|
|
/* Critical input. */
|
|
CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
|
|
|
|
#ifdef CONFIG_440
|
|
/* Machine check */
|
|
MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
|
|
#else
|
|
CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
|
|
#endif /* CONFIG_440 */
|
|
|
|
/* Data Storage exception. */
|
|
STD_EXCEPTION(0x300, DataStorage, UnknownException)
|
|
|
|
/* Instruction Storage exception. */
|
|
STD_EXCEPTION(0x400, InstStorage, UnknownException)
|
|
|
|
/* External Interrupt exception. */
|
|
STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
|
|
|
|
/* Alignment exception. */
|
|
. = 0x600
|
|
Alignment:
|
|
EXCEPTION_PROLOG(SRR0, SRR1)
|
|
mfspr r4,DAR
|
|
stw r4,_DAR(r21)
|
|
mfspr r5,DSISR
|
|
stw r5,_DSISR(r21)
|
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
|
li r20,MSR_KERNEL
|
|
rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
|
|
lwz r6,GOT(transfer_to_handler)
|
|
mtlr r6
|
|
blrl
|
|
.L_Alignment:
|
|
.long AlignmentException - _start + _START_OFFSET
|
|
.long int_return - _start + _START_OFFSET
|
|
|
|
/* Program check exception */
|
|
. = 0x700
|
|
ProgramCheck:
|
|
EXCEPTION_PROLOG(SRR0, SRR1)
|
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
|
li r20,MSR_KERNEL
|
|
rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
|
|
lwz r6,GOT(transfer_to_handler)
|
|
mtlr r6
|
|
blrl
|
|
.L_ProgramCheck:
|
|
.long ProgramCheckException - _start + _START_OFFSET
|
|
.long int_return - _start + _START_OFFSET
|
|
|
|
#ifdef CONFIG_440
|
|
STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
|
|
STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
|
|
STD_EXCEPTION(0xa00, APU, UnknownException)
|
|
#endif
|
|
STD_EXCEPTION(0xc00, SystemCall, UnknownException)
|
|
|
|
#ifdef CONFIG_440
|
|
STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
|
|
STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
|
|
#else
|
|
STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
|
|
STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
|
|
STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
|
|
#endif
|
|
CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
|
|
|
|
.globl _end_of_vectors
|
|
_end_of_vectors:
|
|
. = _START_OFFSET
|
|
#endif
|
|
.globl _start
|
|
_start:
|
|
|
|
/*****************************************************************************/
|
|
#if defined(CONFIG_440)
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Clear and set up some registers. */
|
|
/*----------------------------------------------------------------*/
|
|
li r0,0x0000
|
|
lis r1,0xffff
|
|
mtspr SPRN_DEC,r0 /* prevent dec exceptions */
|
|
mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */
|
|
mtspr SPRN_TBWU,r0
|
|
mtspr SPRN_TSR,r1 /* clear all timer exception status */
|
|
mtspr SPRN_TCR,r0 /* disable all */
|
|
mtspr SPRN_ESR,r0 /* clear exception syndrome register */
|
|
mtxer r0 /* clear integer exception register */
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Debug setup -- some (not very good) ice's need an event*/
|
|
/* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
|
|
/* value you need in this case 0x8cff 0000 should do the trick */
|
|
/*----------------------------------------------------------------*/
|
|
#if defined(CONFIG_SYS_INIT_DBCR)
|
|
lis r1,0xffff
|
|
ori r1,r1,0xffff
|
|
mtspr SPRN_DBSR,r1 /* Clear all status bits */
|
|
lis r0,CONFIG_SYS_INIT_DBCR@h
|
|
ori r0,r0,CONFIG_SYS_INIT_DBCR@l
|
|
mtspr SPRN_DBCR0,r0
|
|
isync
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Setup the internal SRAM */
|
|
/*----------------------------------------------------------------*/
|
|
li r0,0
|
|
|
|
#ifdef CONFIG_SYS_INIT_RAM_DCACHE
|
|
/* Clear Dcache to use as RAM */
|
|
addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
|
|
addis r4,r0,CONFIG_SYS_INIT_RAM_END@h
|
|
ori r4,r4,CONFIG_SYS_INIT_RAM_END@l
|
|
rlwinm. r5,r4,0,27,31
|
|
rlwinm r5,r4,27,5,31
|
|
beq ..d_ran
|
|
addi r5,r5,0x0001
|
|
..d_ran:
|
|
mtctr r5
|
|
..d_ag:
|
|
dcbz r0,r3
|
|
addi r3,r3,32
|
|
bdnz ..d_ag
|
|
|
|
/*
|
|
* Lock the init-ram/stack in d-cache, so that other regions
|
|
* may use d-cache as well
|
|
* Note, that this current implementation locks exactly 4k
|
|
* of d-cache, so please make sure that you don't define a
|
|
* bigger init-ram area. Take a look at the lwmon5 440EPx
|
|
* implementation as a reference.
|
|
*/
|
|
msync
|
|
isync
|
|
/* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
|
|
lis r1,0x0201
|
|
ori r1,r1,0xf808
|
|
mtspr SPRN_DVLIM,r1
|
|
lis r1,0x0808
|
|
ori r1,r1,0x0808
|
|
mtspr SPRN_DNV0,r1
|
|
mtspr SPRN_DNV1,r1
|
|
mtspr SPRN_DNV2,r1
|
|
mtspr SPRN_DNV3,r1
|
|
mtspr SPRN_DTV0,r1
|
|
mtspr SPRN_DTV1,r1
|
|
mtspr SPRN_DTV2,r1
|
|
mtspr SPRN_DTV3,r1
|
|
msync
|
|
isync
|
|
#endif /* CONFIG_SYS_INIT_RAM_DCACHE */
|
|
|
|
/* 440EP & 440GR are only 440er PPC's without internal SRAM */
|
|
#if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
|
|
/* not all PPC's have internal SRAM usable as L2-cache */
|
|
#if defined(CONFIG_440GX) || \
|
|
defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
|
|
defined(CONFIG_460SX)
|
|
mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */
|
|
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
|
|
lis r1, 0x0000
|
|
ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */
|
|
mtdcr L2_CACHE_CFG,r1
|
|
#endif
|
|
|
|
lis r2,0x7fff
|
|
ori r2,r2,0xffff
|
|
mfdcr r1,ISRAM0_DPC
|
|
and r1,r1,r2 /* Disable parity check */
|
|
mtdcr ISRAM0_DPC,r1
|
|
mfdcr r1,ISRAM0_PMEG
|
|
and r1,r1,r2 /* Disable pwr mgmt */
|
|
mtdcr ISRAM0_PMEG,r1
|
|
|
|
lis r1,0x8000 /* BAS = 8000_0000 */
|
|
#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
|
|
ori r1,r1,0x0980 /* first 64k */
|
|
mtdcr ISRAM0_SB0CR,r1
|
|
lis r1,0x8001
|
|
ori r1,r1,0x0980 /* second 64k */
|
|
mtdcr ISRAM0_SB1CR,r1
|
|
lis r1, 0x8002
|
|
ori r1,r1, 0x0980 /* third 64k */
|
|
mtdcr ISRAM0_SB2CR,r1
|
|
lis r1, 0x8003
|
|
ori r1,r1, 0x0980 /* fourth 64k */
|
|
mtdcr ISRAM0_SB3CR,r1
|
|
#elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || defined(CONFIG_460GT)
|
|
lis r1,0x0000 /* BAS = X_0000_0000 */
|
|
ori r1,r1,0x0984 /* first 64k */
|
|
mtdcr ISRAM0_SB0CR,r1
|
|
lis r1,0x0001
|
|
ori r1,r1,0x0984 /* second 64k */
|
|
mtdcr ISRAM0_SB1CR,r1
|
|
lis r1, 0x0002
|
|
ori r1,r1, 0x0984 /* third 64k */
|
|
mtdcr ISRAM0_SB2CR,r1
|
|
lis r1, 0x0003
|
|
ori r1,r1, 0x0984 /* fourth 64k */
|
|
mtdcr ISRAM0_SB3CR,r1
|
|
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
|
|
lis r2,0x7fff
|
|
ori r2,r2,0xffff
|
|
mfdcr r1,ISRAM1_DPC
|
|
and r1,r1,r2 /* Disable parity check */
|
|
mtdcr ISRAM1_DPC,r1
|
|
mfdcr r1,ISRAM1_PMEG
|
|
and r1,r1,r2 /* Disable pwr mgmt */
|
|
mtdcr ISRAM1_PMEG,r1
|
|
|
|
lis r1,0x0004 /* BAS = 4_0004_0000 */
|
|
ori r1,r1,0x0984 /* 64k */
|
|
mtdcr ISRAM1_SB0CR,r1
|
|
#endif
|
|
#elif defined(CONFIG_460SX)
|
|
lis r1,0x0000 /* BAS = 0000_0000 */
|
|
ori r1,r1,0x0B84 /* first 128k */
|
|
mtdcr ISRAM0_SB0CR,r1
|
|
lis r1,0x0001
|
|
ori r1,r1,0x0B84 /* second 128k */
|
|
mtdcr ISRAM0_SB1CR,r1
|
|
lis r1, 0x0002
|
|
ori r1,r1, 0x0B84 /* third 128k */
|
|
mtdcr ISRAM0_SB2CR,r1
|
|
lis r1, 0x0003
|
|
ori r1,r1, 0x0B84 /* fourth 128k */
|
|
mtdcr ISRAM0_SB3CR,r1
|
|
#elif defined(CONFIG_440GP)
|
|
ori r1,r1,0x0380 /* 8k rw */
|
|
mtdcr ISRAM0_SB0CR,r1
|
|
mtdcr ISRAM0_SB1CR,r0 /* Disable bank 1 */
|
|
#endif
|
|
#endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
|
|
|
|
/*----------------------------------------------------------------*/
|
|
/* Setup the stack in internal SRAM */
|
|
/*----------------------------------------------------------------*/
|
|
lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
|
|
li r0,0
|
|
stwu r0,-4(r1)
|
|
stwu r0,-4(r1) /* Terminate call chain */
|
|
|
|
stwu r1,-8(r1) /* Save back chain and move SP */
|
|
lis r0,RESET_VECTOR@h /* Address of reset vector */
|
|
ori r0,r0, RESET_VECTOR@l
|
|
stwu r1,-8(r1) /* Save back chain and move SP */
|
|
stw r0,+12(r1) /* Save return addr (underflow vect) */
|
|
|
|
#ifdef CONFIG_NAND_SPL
|
|
bl nand_boot_common /* will not return */
|
|
#else
|
|
GET_GOT
|
|
|
|
bl cpu_init_f /* run low-level CPU init code (from Flash) */
|
|
bl board_init_f
|
|
#endif
|
|
|
|
#endif /* CONFIG_440 */
|
|
|
|
/*****************************************************************************/
|
|
#ifdef CONFIG_IOP480
|
|
/*----------------------------------------------------------------------- */
|
|
/* Set up some machine state registers. */
|
|
/*----------------------------------------------------------------------- */
|
|
addi r0,r0,0x0000 /* initialize r0 to zero */
|
|
mtspr SPRN_ESR,r0 /* clear Exception Syndrome Reg */
|
|
mttcr r0 /* timer control register */
|
|
mtexier r0 /* disable all interrupts */
|
|
addis r4,r0,0xFFFF /* set r4 to 0xFFFFFFFF (status in the */
|
|
ori r4,r4,0xFFFF /* dbsr is cleared by setting bits to 1) */
|
|
mtdbsr r4 /* clear/reset the dbsr */
|
|
mtexisr r4 /* clear all pending interrupts */
|
|
addis r4,r0,0x8000
|
|
mtexier r4 /* enable critical exceptions */
|
|
addis r4,r0,0x0000 /* assume 403GCX - enable core clk */
|
|
ori r4,r4,0x4020 /* dbling (no harm done on GA and GC */
|
|
mtiocr r4 /* since bit not used) & DRC to latch */
|
|
/* data bus on rising edge of CAS */
|
|
/*----------------------------------------------------------------------- */
|
|
/* Clear XER. */
|
|
/*----------------------------------------------------------------------- */
|
|
mtxer r0
|
|
/*----------------------------------------------------------------------- */
|
|
/* Invalidate i-cache and d-cache TAG arrays. */
|
|
/*----------------------------------------------------------------------- */
|
|
addi r3,0,1024 /* 1/4 of I-cache size, half of D-cache */
|
|
addi r4,0,1024 /* 1/4 of I-cache */
|
|
..cloop:
|
|
iccci 0,r3
|
|
iccci r4,r3
|
|
dccci 0,r3
|
|
addic. r3,r3,-16 /* move back one cache line */
|
|
bne ..cloop /* loop back to do rest until r3 = 0 */
|
|
|
|
/* */
|
|
/* initialize IOP480 so it can read 1 MB code area for SRAM spaces */
|
|
/* this requires enabling MA[17..0], by default only MA[12..0] are enabled. */
|
|
/* */
|
|
|
|
/* first copy IOP480 register base address into r3 */
|
|
addis r3,0,0x5000 /* IOP480 register base address hi */
|
|
/* ori r3,r3,0x0000 / IOP480 register base address lo */
|
|
|
|
#ifdef CONFIG_ADCIOP
|
|
/* use r4 as the working variable */
|
|
/* turn on CS3 (LOCCTL.7) */
|
|
lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
|
|
andi. r4,r4,0xff7f /* make bit 7 = 0 -- CS3 mode */
|
|
stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
|
|
#endif
|
|
|
|
#ifdef CONFIG_DASA_SIM
|
|
/* use r4 as the working variable */
|
|
/* turn on MA17 (LOCCTL.7) */
|
|
lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
|
|
ori r4,r4,0x80 /* make bit 7 = 1 -- MA17 mode */
|
|
stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
|
|
#endif
|
|
|
|
/* turn on MA16..13 (LCS0BRD.12 = 0) */
|
|
lwz r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
|
|
andi. r4,r4,0xefff /* make bit 12 = 0 */
|
|
stw r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
|
|
|
|
/* make sure above stores all comlete before going on */
|
|
sync
|
|
|
|
/* last thing, set local init status done bit (DEVINIT.31) */
|
|
lwz r4,0x80(r3) /* DEVINIT is at offset 0x80 */
|
|
oris r4,r4,0x8000 /* make bit 31 = 1 */
|
|
stw r4,0x80(r3) /* DEVINIT is at offset 0x80 */
|
|
|
|
/* clear all pending interrupts and disable all interrupts */
|
|
li r4,-1 /* set p1 to 0xffffffff */
|
|
stw r4,0x1b0(r3) /* clear all pending interrupts */
|
|
stw r4,0x1b8(r3) /* clear all pending interrupts */
|
|
li r4,0 /* set r4 to 0 */
|
|
stw r4,0x1b4(r3) /* disable all interrupts */
|
|
stw r4,0x1bc(r3) /* disable all interrupts */
|
|
|
|
/* make sure above stores all comlete before going on */
|
|
sync
|
|
|
|
/* Set-up icache cacheability. */
|
|
lis r1, CONFIG_SYS_ICACHE_SACR_VALUE@h
|
|
ori r1, r1, CONFIG_SYS_ICACHE_SACR_VALUE@l
|
|
mticcr r1
|
|
isync
|
|
|
|
/* Set-up dcache cacheability. */
|
|
lis r1, CONFIG_SYS_DCACHE_SACR_VALUE@h
|
|
ori r1, r1, CONFIG_SYS_DCACHE_SACR_VALUE@l
|
|
mtdccr r1
|
|
|
|
addis r1,r0,CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack to SDRAM */
|
|
li r0, 0 /* Make room for stack frame header and */
|
|
stwu r0, -4(r1) /* clear final stack frame so that */
|
|
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
|
|
|
|
GET_GOT /* initialize GOT access */
|
|
|
|
bl board_init_f /* run first part of init code (from Flash) */
|
|
|
|
#endif /* CONFIG_IOP480 */
|
|
|
|
/*****************************************************************************/
|
|
#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
|
|
defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
|
|
defined(CONFIG_405EX) || defined(CONFIG_405)
|
|
/*----------------------------------------------------------------------- */
|
|
/* Clear and set up some registers. */
|
|
/*----------------------------------------------------------------------- */
|
|
addi r4,r0,0x0000
|
|
#if !defined(CONFIG_405EX)
|
|
mtspr SPRN_SGR,r4
|
|
#else
|
|
/*
|
|
* On 405EX, completely clearing the SGR leads to PPC hangup
|
|
* upon PCIe configuration access. The PCIe memory regions
|
|
* need to be guarded!
|
|
*/
|
|
lis r3,0x0000
|
|
ori r3,r3,0x7FFC
|
|
mtspr SPRN_SGR,r3
|
|
#endif
|
|
mtspr SPRN_DCWR,r4
|
|
mtesr r4 /* clear Exception Syndrome Reg */
|
|
mttcr r4 /* clear Timer Control Reg */
|
|
mtxer r4 /* clear Fixed-Point Exception Reg */
|
|
mtevpr r4 /* clear Exception Vector Prefix Reg */
|
|
addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
|
|
/* dbsr is cleared by setting bits to 1) */
|
|
mtdbsr r4 /* clear/reset the dbsr */
|
|
|
|
/* Invalidate the i- and d-caches. */
|
|
bl invalidate_icache
|
|
bl invalidate_dcache
|
|
|
|
/* Set-up icache cacheability. */
|
|
lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
|
|
ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
|
|
mticcr r4
|
|
isync
|
|
|
|
/* Set-up dcache cacheability. */
|
|
lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
|
|
ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
|
|
mtdccr r4
|
|
|
|
#if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
|
|
&& !defined (CONFIG_XILINX_405)
|
|
/*----------------------------------------------------------------------- */
|
|
/* Tune the speed and size for flash CS0 */
|
|
/*----------------------------------------------------------------------- */
|
|
bl ext_bus_cntlr_init
|
|
#endif
|
|
|
|
#if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
|
|
/*
|
|
* For boards that don't have OCM and can't use the data cache
|
|
* for their primordial stack, setup stack here directly after the
|
|
* SDRAM is initialized in ext_bus_cntlr_init.
|
|
*/
|
|
lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
|
|
|
|
li r0, 0 /* Make room for stack frame header and */
|
|
stwu r0, -4(r1) /* clear final stack frame so that */
|
|
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
|
|
/*
|
|
* Set up a dummy frame to store reset vector as return address.
|
|
* this causes stack underflow to reset board.
|
|
*/
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
lis r0, RESET_VECTOR@h /* Address of reset vector */
|
|
ori r0, r0, RESET_VECTOR@l
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
stw r0, +12(r1) /* Save return addr (underflow vect) */
|
|
#endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
|
|
|
|
#if defined(CONFIG_405EP)
|
|
/*----------------------------------------------------------------------- */
|
|
/* DMA Status, clear to come up clean */
|
|
/*----------------------------------------------------------------------- */
|
|
addis r3,r0, 0xFFFF /* Clear all existing DMA status */
|
|
ori r3,r3, 0xFFFF
|
|
mtdcr DMASR, r3
|
|
|
|
bl ppc405ep_init /* do ppc405ep specific init */
|
|
#endif /* CONFIG_405EP */
|
|
|
|
#if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
|
|
#if defined(CONFIG_405EZ)
|
|
/********************************************************************
|
|
* Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
|
|
*******************************************************************/
|
|
/*
|
|
* We can map the OCM on the PLB3, so map it at
|
|
* CONFIG_SYS_OCM_DATA_ADDR + 0x8000
|
|
*/
|
|
lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
|
|
ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
|
|
ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
|
|
mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */
|
|
ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
|
|
mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */
|
|
isync
|
|
|
|
lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
|
|
ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
|
|
ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
|
|
mtdcr OCM0_DSRC1, r3 /* Set Data Side */
|
|
mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */
|
|
ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
|
|
mtdcr OCM0_DSRC2, r3 /* Set Data Side */
|
|
mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */
|
|
addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
|
|
mtdcr OCM0_DISDPC,r3
|
|
|
|
isync
|
|
#else /* CONFIG_405EZ */
|
|
/********************************************************************
|
|
* Setup OCM - On Chip Memory
|
|
*******************************************************************/
|
|
/* Setup OCM */
|
|
lis r0, 0x7FFF
|
|
ori r0, r0, 0xFFFF
|
|
mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */
|
|
mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */
|
|
and r3, r3, r0 /* disable data-side IRAM */
|
|
and r4, r4, r0 /* disable data-side IRAM */
|
|
mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */
|
|
mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */
|
|
isync
|
|
|
|
lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
|
|
ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
|
|
mtdcr OCM0_DSARC, r3
|
|
addis r4, 0, 0xC000 /* OCM data area enabled */
|
|
mtdcr OCM0_DSCNTL, r4
|
|
isync
|
|
#endif /* CONFIG_405EZ */
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------------- */
|
|
/* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
|
|
/*----------------------------------------------------------------------- */
|
|
#ifdef CONFIG_SYS_INIT_DCACHE_CS
|
|
li r4, PBxAP
|
|
mtdcr EBC0_CFGADDR, r4
|
|
lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
|
|
ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
|
|
mtdcr EBC0_CFGDATA, r4
|
|
|
|
addi r4, 0, PBxCR
|
|
mtdcr EBC0_CFGADDR, r4
|
|
lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
|
|
ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
|
|
mtdcr EBC0_CFGDATA, r4
|
|
|
|
/*
|
|
* Enable the data cache for the 128MB storage access control region
|
|
* at CONFIG_SYS_INIT_RAM_ADDR.
|
|
*/
|
|
mfdccr r4
|
|
oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
|
|
ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
|
|
mtdccr r4
|
|
|
|
/*
|
|
* Preallocate data cache lines to be used to avoid a subsequent
|
|
* cache miss and an ensuing machine check exception when exceptions
|
|
* are enabled.
|
|
*/
|
|
li r0, 0
|
|
|
|
lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
|
|
|
|
lis r4, CONFIG_SYS_INIT_RAM_END@h
|
|
ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
|
|
|
|
/*
|
|
* Convert the size, in bytes, to the number of cache lines/blocks
|
|
* to preallocate.
|
|
*/
|
|
clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
|
|
srwi r5, r4, L1_CACHE_SHIFT
|
|
beq ..load_counter
|
|
addi r5, r5, 0x0001
|
|
..load_counter:
|
|
mtctr r5
|
|
|
|
/* Preallocate the computed number of cache blocks. */
|
|
..alloc_dcache_block:
|
|
dcba r0, r3
|
|
addi r3, r3, L1_CACHE_BYTES
|
|
bdnz ..alloc_dcache_block
|
|
sync
|
|
|
|
/*
|
|
* Load the initial stack pointer and data area and convert the size,
|
|
* in bytes, to the number of words to initialize to a known value.
|
|
*/
|
|
lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
|
|
|
|
lis r4, (CONFIG_SYS_INIT_RAM_END >> 2)@h
|
|
ori r4, r4, (CONFIG_SYS_INIT_RAM_END >> 2)@l
|
|
mtctr r4
|
|
|
|
lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r2, r2, CONFIG_SYS_INIT_RAM_END@l
|
|
|
|
lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
|
|
ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
|
|
|
|
..stackloop:
|
|
stwu r4, -4(r2)
|
|
bdnz ..stackloop
|
|
|
|
/*
|
|
* Make room for stack frame header and clear final stack frame so
|
|
* that stack backtraces terminate cleanly.
|
|
*/
|
|
stwu r0, -4(r1)
|
|
stwu r0, -4(r1)
|
|
|
|
/*
|
|
* Set up a dummy frame to store reset vector as return address.
|
|
* this causes stack underflow to reset board.
|
|
*/
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
|
|
ori r0, r0, RESET_VECTOR@l
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
stw r0, +12(r1) /* Save return addr (underflow vect) */
|
|
|
|
#elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
|
|
(defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
|
|
/*
|
|
* Stack in OCM.
|
|
*/
|
|
|
|
/* Set up Stack at top of OCM */
|
|
lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
|
|
ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
|
|
|
|
/* Set up a zeroized stack frame so that backtrace works right */
|
|
li r0, 0
|
|
stwu r0, -4(r1)
|
|
stwu r0, -4(r1)
|
|
|
|
/*
|
|
* Set up a dummy frame to store reset vector as return address.
|
|
* this causes stack underflow to reset board.
|
|
*/
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
lis r0, RESET_VECTOR@h /* Address of reset vector */
|
|
ori r0, r0, RESET_VECTOR@l
|
|
stwu r1, -8(r1) /* Save back chain and move SP */
|
|
stw r0, +12(r1) /* Save return addr (underflow vect) */
|
|
#endif /* CONFIG_SYS_INIT_DCACHE_CS */
|
|
|
|
#ifdef CONFIG_NAND_SPL
|
|
bl nand_boot_common /* will not return */
|
|
#else
|
|
GET_GOT /* initialize GOT access */
|
|
|
|
bl cpu_init_f /* run low-level CPU init code (from Flash) */
|
|
|
|
/* NEVER RETURNS! */
|
|
bl board_init_f /* run first part of init code (from Flash) */
|
|
#endif /* CONFIG_NAND_SPL */
|
|
|
|
#endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */
|
|
/*----------------------------------------------------------------------- */
|
|
|
|
|
|
#ifndef CONFIG_NAND_SPL
|
|
/*
|
|
* This code finishes saving the registers to the exception frame
|
|
* and jumps to the appropriate handler for the exception.
|
|
* Register r21 is pointer into trap frame, r1 has new stack pointer.
|
|
*/
|
|
.globl transfer_to_handler
|
|
transfer_to_handler:
|
|
stw r22,_NIP(r21)
|
|
lis r22,MSR_POW@h
|
|
andc r23,r23,r22
|
|
stw r23,_MSR(r21)
|
|
SAVE_GPR(7, r21)
|
|
SAVE_4GPRS(8, r21)
|
|
SAVE_8GPRS(12, r21)
|
|
SAVE_8GPRS(24, r21)
|
|
mflr r23
|
|
andi. r24,r23,0x3f00 /* get vector offset */
|
|
stw r24,TRAP(r21)
|
|
li r22,0
|
|
stw r22,RESULT(r21)
|
|
mtspr SPRG2,r22 /* r1 is now kernel sp */
|
|
lwz r24,0(r23) /* virtual address of handler */
|
|
lwz r23,4(r23) /* where to go when done */
|
|
mtspr SRR0,r24
|
|
mtspr SRR1,r20
|
|
mtlr r23
|
|
SYNC
|
|
rfi /* jump to handler, enable MMU */
|
|
|
|
int_return:
|
|
mfmsr r28 /* Disable interrupts */
|
|
li r4,0
|
|
ori r4,r4,MSR_EE
|
|
andc r28,r28,r4
|
|
SYNC /* Some chip revs need this... */
|
|
mtmsr r28
|
|
SYNC
|
|
lwz r2,_CTR(r1)
|
|
lwz r0,_LINK(r1)
|
|
mtctr r2
|
|
mtlr r0
|
|
lwz r2,_XER(r1)
|
|
lwz r0,_CCR(r1)
|
|
mtspr XER,r2
|
|
mtcrf 0xFF,r0
|
|
REST_10GPRS(3, r1)
|
|
REST_10GPRS(13, r1)
|
|
REST_8GPRS(23, r1)
|
|
REST_GPR(31, r1)
|
|
lwz r2,_NIP(r1) /* Restore environment */
|
|
lwz r0,_MSR(r1)
|
|
mtspr SRR0,r2
|
|
mtspr SRR1,r0
|
|
lwz r0,GPR0(r1)
|
|
lwz r2,GPR2(r1)
|
|
lwz r1,GPR1(r1)
|
|
SYNC
|
|
rfi
|
|
|
|
crit_return:
|
|
mfmsr r28 /* Disable interrupts */
|
|
li r4,0
|
|
ori r4,r4,MSR_EE
|
|
andc r28,r28,r4
|
|
SYNC /* Some chip revs need this... */
|
|
mtmsr r28
|
|
SYNC
|
|
lwz r2,_CTR(r1)
|
|
lwz r0,_LINK(r1)
|
|
mtctr r2
|
|
mtlr r0
|
|
lwz r2,_XER(r1)
|
|
lwz r0,_CCR(r1)
|
|
mtspr XER,r2
|
|
mtcrf 0xFF,r0
|
|
REST_10GPRS(3, r1)
|
|
REST_10GPRS(13, r1)
|
|
REST_8GPRS(23, r1)
|
|
REST_GPR(31, r1)
|
|
lwz r2,_NIP(r1) /* Restore environment */
|
|
lwz r0,_MSR(r1)
|
|
mtspr SPRN_CSRR0,r2
|
|
mtspr SPRN_CSRR1,r0
|
|
lwz r0,GPR0(r1)
|
|
lwz r2,GPR2(r1)
|
|
lwz r1,GPR1(r1)
|
|
SYNC
|
|
rfci
|
|
|
|
#ifdef CONFIG_440
|
|
mck_return:
|
|
mfmsr r28 /* Disable interrupts */
|
|
li r4,0
|
|
ori r4,r4,MSR_EE
|
|
andc r28,r28,r4
|
|
SYNC /* Some chip revs need this... */
|
|
mtmsr r28
|
|
SYNC
|
|
lwz r2,_CTR(r1)
|
|
lwz r0,_LINK(r1)
|
|
mtctr r2
|
|
mtlr r0
|
|
lwz r2,_XER(r1)
|
|
lwz r0,_CCR(r1)
|
|
mtspr XER,r2
|
|
mtcrf 0xFF,r0
|
|
REST_10GPRS(3, r1)
|
|
REST_10GPRS(13, r1)
|
|
REST_8GPRS(23, r1)
|
|
REST_GPR(31, r1)
|
|
lwz r2,_NIP(r1) /* Restore environment */
|
|
lwz r0,_MSR(r1)
|
|
mtspr SPRN_MCSRR0,r2
|
|
mtspr SPRN_MCSRR1,r0
|
|
lwz r0,GPR0(r1)
|
|
lwz r2,GPR2(r1)
|
|
lwz r1,GPR1(r1)
|
|
SYNC
|
|
rfmci
|
|
#endif /* CONFIG_440 */
|
|
|
|
|
|
.globl get_pvr
|
|
get_pvr:
|
|
mfspr r3, PVR
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: out16 */
|
|
/* Description: Output 16 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl out16
|
|
out16:
|
|
sth r4,0x0000(r3)
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: out16r */
|
|
/* Description: Byte reverse and output 16 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl out16r
|
|
out16r:
|
|
sthbrx r4,r0,r3
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: out32r */
|
|
/* Description: Byte reverse and output 32 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl out32r
|
|
out32r:
|
|
stwbrx r4,r0,r3
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: in16 */
|
|
/* Description: Input 16 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl in16
|
|
in16:
|
|
lhz r3,0x0000(r3)
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: in16r */
|
|
/* Description: Input 16 bits and byte reverse */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl in16r
|
|
in16r:
|
|
lhbrx r3,r0,r3
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: in32r */
|
|
/* Description: Input 32 bits and byte reverse */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl in32r
|
|
in32r:
|
|
lwbrx r3,r0,r3
|
|
blr
|
|
|
|
/*
|
|
* void relocate_code (addr_sp, gd, addr_moni)
|
|
*
|
|
* This "function" does not return, instead it continues in RAM
|
|
* after relocating the monitor code.
|
|
*
|
|
* r3 = Relocated stack pointer
|
|
* r4 = Relocated global data pointer
|
|
* r5 = Relocated text pointer
|
|
*/
|
|
.globl relocate_code
|
|
relocate_code:
|
|
#if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
|
|
/*
|
|
* We need to flush the initial global data (gd_t) before the dcache
|
|
* will be invalidated.
|
|
*/
|
|
|
|
/* Save registers */
|
|
mr r9, r3
|
|
mr r10, r4
|
|
mr r11, r5
|
|
|
|
/* Flush initial global data range */
|
|
mr r3, r4
|
|
addi r4, r4, CONFIG_SYS_GBL_DATA_SIZE@l
|
|
bl flush_dcache_range
|
|
|
|
#if defined(CONFIG_SYS_INIT_DCACHE_CS)
|
|
/*
|
|
* Undo the earlier data cache set-up for the primordial stack and
|
|
* data area. First, invalidate the data cache and then disable data
|
|
* cacheability for that area. Finally, restore the EBC values, if
|
|
* any.
|
|
*/
|
|
|
|
/* Invalidate the primordial stack and data area in cache */
|
|
lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
|
|
ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
|
|
|
|
lis r4, CONFIG_SYS_INIT_RAM_END@h
|
|
ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
|
|
add r4, r4, r3
|
|
|
|
bl invalidate_dcache_range
|
|
|
|
/* Disable cacheability for the region */
|
|
mfdccr r3
|
|
lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
|
|
ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
|
|
and r3, r3, r4
|
|
mtdccr r3
|
|
|
|
/* Restore the EBC parameters */
|
|
li r3, PBxAP
|
|
mtdcr EBC0_CFGADDR, r3
|
|
lis r3, PBxAP_VAL@h
|
|
ori r3, r3, PBxAP_VAL@l
|
|
mtdcr EBC0_CFGDATA, r3
|
|
|
|
li r3, PBxCR
|
|
mtdcr EBC0_CFGADDR, r3
|
|
lis r3, PBxCR_VAL@h
|
|
ori r3, r3, PBxCR_VAL@l
|
|
mtdcr EBC0_CFGDATA, r3
|
|
#endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
|
|
|
|
/* Restore registers */
|
|
mr r3, r9
|
|
mr r4, r10
|
|
mr r5, r11
|
|
#endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
|
|
|
|
#ifdef CONFIG_SYS_INIT_RAM_DCACHE
|
|
/*
|
|
* Unlock the previously locked d-cache
|
|
*/
|
|
msync
|
|
isync
|
|
/* set TFLOOR/NFLOOR to 0 again */
|
|
lis r6,0x0001
|
|
ori r6,r6,0xf800
|
|
mtspr SPRN_DVLIM,r6
|
|
lis r6,0x0000
|
|
ori r6,r6,0x0000
|
|
mtspr SPRN_DNV0,r6
|
|
mtspr SPRN_DNV1,r6
|
|
mtspr SPRN_DNV2,r6
|
|
mtspr SPRN_DNV3,r6
|
|
mtspr SPRN_DTV0,r6
|
|
mtspr SPRN_DTV1,r6
|
|
mtspr SPRN_DTV2,r6
|
|
mtspr SPRN_DTV3,r6
|
|
msync
|
|
isync
|
|
#endif /* CONFIG_SYS_INIT_RAM_DCACHE */
|
|
|
|
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
|
|
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
|
|
defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
|
|
defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
|
|
defined(CONFIG_460SX)
|
|
/*
|
|
* On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
|
|
* to speed up the boot process. Now this cache needs to be disabled.
|
|
*/
|
|
iccci 0,0 /* Invalidate inst cache */
|
|
dccci 0,0 /* Invalidate data cache, now no longer our stack */
|
|
sync
|
|
isync
|
|
|
|
/* Clear all potential pending exceptions */
|
|
mfspr r1,SPRN_MCSR
|
|
mtspr SPRN_MCSR,r1
|
|
#ifdef CONFIG_SYS_TLB_FOR_BOOT_FLASH
|
|
addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
|
|
#else
|
|
addi r1,r0,0x0000 /* Default TLB entry is #0 */
|
|
#endif /* CONFIG_SYS_TLB_FOR_BOOT_FLASH */
|
|
tlbre r0,r1,0x0002 /* Read contents */
|
|
ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
|
|
tlbwe r0,r1,0x0002 /* Save it out */
|
|
sync
|
|
isync
|
|
#endif /* defined(CONFIG_440EP) || ... || defined(CONFIG_460GT) */
|
|
mr r1, r3 /* Set new stack pointer */
|
|
mr r9, r4 /* Save copy of Init Data pointer */
|
|
mr r10, r5 /* Save copy of Destination Address */
|
|
|
|
mr r3, r5 /* Destination Address */
|
|
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
|
|
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
|
|
lwz r5, GOT(__init_end)
|
|
sub r5, r5, r4
|
|
li r6, L1_CACHE_BYTES /* Cache Line Size */
|
|
|
|
/*
|
|
* Fix GOT pointer:
|
|
*
|
|
* New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
|
|
*
|
|
* Offset:
|
|
*/
|
|
sub r15, r10, r4
|
|
|
|
/* First our own GOT */
|
|
add r14, r14, r15
|
|
/* then the one used by the C code */
|
|
add r30, r30, r15
|
|
|
|
/*
|
|
* Now relocate code
|
|
*/
|
|
|
|
cmplw cr1,r3,r4
|
|
addi r0,r5,3
|
|
srwi. r0,r0,2
|
|
beq cr1,4f /* In place copy is not necessary */
|
|
beq 7f /* Protect against 0 count */
|
|
mtctr r0
|
|
bge cr1,2f
|
|
|
|
la r8,-4(r4)
|
|
la r7,-4(r3)
|
|
1: lwzu r0,4(r8)
|
|
stwu r0,4(r7)
|
|
bdnz 1b
|
|
b 4f
|
|
|
|
2: slwi r0,r0,2
|
|
add r8,r4,r0
|
|
add r7,r3,r0
|
|
3: lwzu r0,-4(r8)
|
|
stwu r0,-4(r7)
|
|
bdnz 3b
|
|
|
|
/*
|
|
* Now flush the cache: note that we must start from a cache aligned
|
|
* address. Otherwise we might miss one cache line.
|
|
*/
|
|
4: cmpwi r6,0
|
|
add r5,r3,r5
|
|
beq 7f /* Always flush prefetch queue in any case */
|
|
subi r0,r6,1
|
|
andc r3,r3,r0
|
|
mr r4,r3
|
|
5: dcbst 0,r4
|
|
add r4,r4,r6
|
|
cmplw r4,r5
|
|
blt 5b
|
|
sync /* Wait for all dcbst to complete on bus */
|
|
mr r4,r3
|
|
6: icbi 0,r4
|
|
add r4,r4,r6
|
|
cmplw r4,r5
|
|
blt 6b
|
|
7: sync /* Wait for all icbi to complete on bus */
|
|
isync
|
|
|
|
/*
|
|
* We are done. Do not return, instead branch to second part of board
|
|
* initialization, now running from RAM.
|
|
*/
|
|
|
|
addi r0, r10, in_ram - _start + _START_OFFSET
|
|
mtlr r0
|
|
blr /* NEVER RETURNS! */
|
|
|
|
in_ram:
|
|
|
|
/*
|
|
* Relocation Function, r14 point to got2+0x8000
|
|
*
|
|
* Adjust got2 pointers, no need to check for 0, this code
|
|
* already puts a few entries in the table.
|
|
*/
|
|
li r0,__got2_entries@sectoff@l
|
|
la r3,GOT(_GOT2_TABLE_)
|
|
lwz r11,GOT(_GOT2_TABLE_)
|
|
mtctr r0
|
|
sub r11,r3,r11
|
|
addi r3,r3,-4
|
|
1: lwzu r0,4(r3)
|
|
cmpwi r0,0
|
|
beq- 2f
|
|
add r0,r0,r11
|
|
stw r0,0(r3)
|
|
2: bdnz 1b
|
|
|
|
/*
|
|
* Now adjust the fixups and the pointers to the fixups
|
|
* in case we need to move ourselves again.
|
|
*/
|
|
li r0,__fixup_entries@sectoff@l
|
|
lwz r3,GOT(_FIXUP_TABLE_)
|
|
cmpwi r0,0
|
|
mtctr r0
|
|
addi r3,r3,-4
|
|
beq 4f
|
|
3: lwzu r4,4(r3)
|
|
lwzux r0,r4,r11
|
|
add r0,r0,r11
|
|
stw r10,0(r3)
|
|
stw r0,0(r4)
|
|
bdnz 3b
|
|
4:
|
|
clear_bss:
|
|
/*
|
|
* Now clear BSS segment
|
|
*/
|
|
lwz r3,GOT(__bss_start)
|
|
lwz r4,GOT(_end)
|
|
|
|
cmplw 0, r3, r4
|
|
beq 7f
|
|
|
|
li r0, 0
|
|
|
|
andi. r5, r4, 3
|
|
beq 6f
|
|
sub r4, r4, r5
|
|
mtctr r5
|
|
mr r5, r4
|
|
5: stb r0, 0(r5)
|
|
addi r5, r5, 1
|
|
bdnz 5b
|
|
6:
|
|
stw r0, 0(r3)
|
|
addi r3, r3, 4
|
|
cmplw 0, r3, r4
|
|
bne 6b
|
|
|
|
7:
|
|
mr r3, r9 /* Init Data pointer */
|
|
mr r4, r10 /* Destination Address */
|
|
bl board_init_r
|
|
|
|
/*
|
|
* Copy exception vector code to low memory
|
|
*
|
|
* r3: dest_addr
|
|
* r7: source address, r8: end address, r9: target address
|
|
*/
|
|
.globl trap_init
|
|
trap_init:
|
|
lwz r7, GOT(_start_of_vectors)
|
|
lwz r8, GOT(_end_of_vectors)
|
|
|
|
li r9, 0x100 /* reset vector always at 0x100 */
|
|
|
|
cmplw 0, r7, r8
|
|
bgelr /* return if r7>=r8 - just in case */
|
|
|
|
mflr r4 /* save link register */
|
|
1:
|
|
lwz r0, 0(r7)
|
|
stw r0, 0(r9)
|
|
addi r7, r7, 4
|
|
addi r9, r9, 4
|
|
cmplw 0, r7, r8
|
|
bne 1b
|
|
|
|
/*
|
|
* relocate `hdlr' and `int_return' entries
|
|
*/
|
|
li r7, .L_MachineCheck - _start + _START_OFFSET
|
|
li r8, Alignment - _start + _START_OFFSET
|
|
2:
|
|
bl trap_reloc
|
|
addi r7, r7, 0x100 /* next exception vector */
|
|
cmplw 0, r7, r8
|
|
blt 2b
|
|
|
|
li r7, .L_Alignment - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_ProgramCheck - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
#ifdef CONFIG_440
|
|
li r7, .L_FPUnavailable - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_Decrementer - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_APU - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_InstructionTLBError - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_DataTLBError - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
#else /* CONFIG_440 */
|
|
li r7, .L_PIT - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
li r7, .L_DataTLBMiss - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
#endif /* CONFIG_440 */
|
|
|
|
li r7, .L_DebugBreakpoint - _start + _START_OFFSET
|
|
bl trap_reloc
|
|
|
|
#if !defined(CONFIG_440)
|
|
addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
|
|
oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
|
|
mtmsr r7 /* change MSR */
|
|
#else
|
|
bl __440_msr_set
|
|
b __440_msr_continue
|
|
|
|
__440_msr_set:
|
|
addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
|
|
oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
|
|
mtspr SPRN_SRR1,r7
|
|
mflr r7
|
|
mtspr SPRN_SRR0,r7
|
|
rfi
|
|
__440_msr_continue:
|
|
#endif
|
|
|
|
mtlr r4 /* restore link register */
|
|
blr
|
|
|
|
/*
|
|
* Function: relocate entries for one exception vector
|
|
*/
|
|
trap_reloc:
|
|
lwz r0, 0(r7) /* hdlr ... */
|
|
add r0, r0, r3 /* ... += dest_addr */
|
|
stw r0, 0(r7)
|
|
|
|
lwz r0, 4(r7) /* int_return ... */
|
|
add r0, r0, r3 /* ... += dest_addr */
|
|
stw r0, 4(r7)
|
|
|
|
blr
|
|
|
|
#if defined(CONFIG_440)
|
|
/*----------------------------------------------------------------------------+
|
|
| dcbz_area.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(dcbz_area)
|
|
rlwinm. r5,r4,0,27,31
|
|
rlwinm r5,r4,27,5,31
|
|
beq ..d_ra2
|
|
addi r5,r5,0x0001
|
|
..d_ra2:mtctr r5
|
|
..d_ag2:dcbz r0,r3
|
|
addi r3,r3,32
|
|
bdnz ..d_ag2
|
|
sync
|
|
blr
|
|
function_epilog(dcbz_area)
|
|
#endif /* CONFIG_440 */
|
|
#endif /* CONFIG_NAND_SPL */
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: in8 */
|
|
/* Description: Input 8 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl in8
|
|
in8:
|
|
lbz r3,0x0000(r3)
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: out8 */
|
|
/* Description: Output 8 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl out8
|
|
out8:
|
|
stb r4,0x0000(r3)
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: out32 */
|
|
/* Description: Output 32 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl out32
|
|
out32:
|
|
stw r4,0x0000(r3)
|
|
blr
|
|
|
|
/*------------------------------------------------------------------------------- */
|
|
/* Function: in32 */
|
|
/* Description: Input 32 bits */
|
|
/*------------------------------------------------------------------------------- */
|
|
.globl in32
|
|
in32:
|
|
lwz 3,0x0000(3)
|
|
blr
|
|
|
|
/**************************************************************************/
|
|
/* PPC405EP specific stuff */
|
|
/**************************************************************************/
|
|
#ifdef CONFIG_405EP
|
|
ppc405ep_init:
|
|
|
|
#ifdef CONFIG_BUBINGA
|
|
/*
|
|
* Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
|
|
* function) to support FPGA and NVRAM accesses below.
|
|
*/
|
|
|
|
lis r3,GPIO0_OSRH@h /* config GPIO output select */
|
|
ori r3,r3,GPIO0_OSRH@l
|
|
lis r4,CONFIG_SYS_GPIO0_OSRH@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
|
|
stw r4,0(r3)
|
|
lis r3,GPIO0_OSRL@h
|
|
ori r3,r3,GPIO0_OSRL@l
|
|
lis r4,CONFIG_SYS_GPIO0_OSRL@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
|
|
stw r4,0(r3)
|
|
|
|
lis r3,GPIO0_ISR1H@h /* config GPIO input select */
|
|
ori r3,r3,GPIO0_ISR1H@l
|
|
lis r4,CONFIG_SYS_GPIO0_ISR1H@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
|
|
stw r4,0(r3)
|
|
lis r3,GPIO0_ISR1L@h
|
|
ori r3,r3,GPIO0_ISR1L@l
|
|
lis r4,CONFIG_SYS_GPIO0_ISR1L@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
|
|
stw r4,0(r3)
|
|
|
|
lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
|
|
ori r3,r3,GPIO0_TSRH@l
|
|
lis r4,CONFIG_SYS_GPIO0_TSRH@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
|
|
stw r4,0(r3)
|
|
lis r3,GPIO0_TSRL@h
|
|
ori r3,r3,GPIO0_TSRL@l
|
|
lis r4,CONFIG_SYS_GPIO0_TSRL@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
|
|
stw r4,0(r3)
|
|
|
|
lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
|
|
ori r3,r3,GPIO0_TCR@l
|
|
lis r4,CONFIG_SYS_GPIO0_TCR@h
|
|
ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
|
|
stw r4,0(r3)
|
|
|
|
li r3,PB1AP /* program EBC bank 1 for RTC access */
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB1AP@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
li r3,PB1CR
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB1CR@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
|
|
li r3,PB1AP /* program EBC bank 1 for RTC access */
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB1AP@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
li r3,PB1CR
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB1CR@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
|
|
li r3,PB4AP /* program EBC bank 4 for FPGA access */
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB4AP@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
li r3,PB4CR
|
|
mtdcr EBC0_CFGADDR,r3
|
|
lis r3,CONFIG_SYS_EBC_PB4CR@h
|
|
ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
|
|
mtdcr EBC0_CFGDATA,r3
|
|
#endif
|
|
|
|
/*
|
|
!-----------------------------------------------------------------------
|
|
! Check to see if chip is in bypass mode.
|
|
! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
|
|
! CPU reset Otherwise, skip this step and keep going.
|
|
! Note: Running BIOS in bypass mode is not supported since PLB speed
|
|
! will not be fast enough for the SDRAM (min 66MHz)
|
|
!-----------------------------------------------------------------------
|
|
*/
|
|
mfdcr r5, CPC0_PLLMR1
|
|
rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
|
|
cmpi cr0,0,r4,0x1
|
|
|
|
beq pll_done /* if SSCS =b'1' then PLL has */
|
|
/* already been set */
|
|
/* and CPU has been reset */
|
|
/* so skip to next section */
|
|
|
|
#ifdef CONFIG_BUBINGA
|
|
/*
|
|
!-----------------------------------------------------------------------
|
|
! Read NVRAM to get value to write in PLLMR.
|
|
! If value has not been correctly saved, write default value
|
|
! Default config values (assuming on-board 33MHz SYS_CLK) are above.
|
|
! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
|
|
!
|
|
! WARNING: This code assumes the first three words in the nvram_t
|
|
! structure in openbios.h. Changing the beginning of
|
|
! the structure will break this code.
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
*/
|
|
addis r3,0,NVRAM_BASE@h
|
|
addi r3,r3,NVRAM_BASE@l
|
|
|
|
lwz r4, 0(r3)
|
|
addis r5,0,NVRVFY1@h
|
|
addi r5,r5,NVRVFY1@l
|
|
cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
|
|
bne ..no_pllset
|
|
addi r3,r3,4
|
|
lwz r4, 0(r3)
|
|
addis r5,0,NVRVFY2@h
|
|
addi r5,r5,NVRVFY2@l
|
|
cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
|
|
bne ..no_pllset
|
|
addi r3,r3,8 /* Skip over conf_size */
|
|
lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
|
|
lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
|
|
rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
|
|
cmpi cr0,0,r5,1 /* See if PLL is locked */
|
|
beq pll_write
|
|
..no_pllset:
|
|
#endif /* CONFIG_BUBINGA */
|
|
|
|
#ifdef CONFIG_TAIHU
|
|
mfdcr r4, CPC0_BOOT
|
|
andi. r5, r4, CPC0_BOOT_SEP@l
|
|
bne strap_1 /* serial eeprom present */
|
|
addis r5,0,CPLD_REG0_ADDR@h
|
|
ori r5,r5,CPLD_REG0_ADDR@l
|
|
andi. r5, r5, 0x10
|
|
bne _pci_66mhz
|
|
#endif /* CONFIG_TAIHU */
|
|
|
|
#if defined(CONFIG_ZEUS)
|
|
mfdcr r4, CPC0_BOOT
|
|
andi. r5, r4, CPC0_BOOT_SEP@l
|
|
bne strap_1 /* serial eeprom present */
|
|
lis r3,0x0000
|
|
addi r3,r3,0x3030
|
|
lis r4,0x8042
|
|
addi r4,r4,0x223e
|
|
b 1f
|
|
strap_1:
|
|
mfdcr r3, CPC0_PLLMR0
|
|
mfdcr r4, CPC0_PLLMR1
|
|
b 1f
|
|
#endif
|
|
|
|
addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
|
|
ori r3,r3,PLLMR0_DEFAULT@l /* */
|
|
addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
|
|
ori r4,r4,PLLMR1_DEFAULT@l /* */
|
|
|
|
#ifdef CONFIG_TAIHU
|
|
b 1f
|
|
_pci_66mhz:
|
|
addis r3,0,PLLMR0_DEFAULT_PCI66@h
|
|
ori r3,r3,PLLMR0_DEFAULT_PCI66@l
|
|
addis r4,0,PLLMR1_DEFAULT_PCI66@h
|
|
ori r4,r4,PLLMR1_DEFAULT_PCI66@l
|
|
b 1f
|
|
strap_1:
|
|
mfdcr r3, CPC0_PLLMR0
|
|
mfdcr r4, CPC0_PLLMR1
|
|
#endif /* CONFIG_TAIHU */
|
|
|
|
1:
|
|
b pll_write /* Write the CPC0_PLLMR with new value */
|
|
|
|
pll_done:
|
|
/*
|
|
!-----------------------------------------------------------------------
|
|
! Clear Soft Reset Register
|
|
! This is needed to enable PCI if not booting from serial EPROM
|
|
!-----------------------------------------------------------------------
|
|
*/
|
|
addi r3, 0, 0x0
|
|
mtdcr CPC0_SRR, r3
|
|
|
|
addis r3,0,0x0010
|
|
mtctr r3
|
|
pci_wait:
|
|
bdnz pci_wait
|
|
|
|
blr /* return to main code */
|
|
|
|
/*
|
|
!-----------------------------------------------------------------------------
|
|
! Function: pll_write
|
|
! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
|
|
! That is:
|
|
! 1. Pll is first disabled (de-activated by putting in bypass mode)
|
|
! 2. PLL is reset
|
|
! 3. Clock dividers are set while PLL is held in reset and bypassed
|
|
! 4. PLL Reset is cleared
|
|
! 5. Wait 100us for PLL to lock
|
|
! 6. A core reset is performed
|
|
! Input: r3 = Value to write to CPC0_PLLMR0
|
|
! Input: r4 = Value to write to CPC0_PLLMR1
|
|
! Output r3 = none
|
|
!-----------------------------------------------------------------------------
|
|
*/
|
|
.globl pll_write
|
|
pll_write:
|
|
mfdcr r5, CPC0_UCR
|
|
andis. r5,r5,0xFFFF
|
|
ori r5,r5,0x0101 /* Stop the UART clocks */
|
|
mtdcr CPC0_UCR,r5 /* Before changing PLL */
|
|
|
|
mfdcr r5, CPC0_PLLMR1
|
|
rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
|
|
mtdcr CPC0_PLLMR1,r5
|
|
oris r5,r5,0x4000 /* Set PLL Reset */
|
|
mtdcr CPC0_PLLMR1,r5
|
|
|
|
mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
|
|
rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
|
|
oris r5,r5,0x4000 /* Set PLL Reset */
|
|
mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
|
|
rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
|
|
mtdcr CPC0_PLLMR1,r5
|
|
|
|
/*
|
|
! Wait min of 100us for PLL to lock.
|
|
! See CMOS 27E databook for more info.
|
|
! At 200MHz, that means waiting 20,000 instructions
|
|
*/
|
|
addi r3,0,20000 /* 2000 = 0x4e20 */
|
|
mtctr r3
|
|
pll_wait:
|
|
bdnz pll_wait
|
|
|
|
oris r5,r5,0x8000 /* Enable PLL */
|
|
mtdcr CPC0_PLLMR1,r5 /* Engage */
|
|
|
|
/*
|
|
* Reset CPU to guarantee timings are OK
|
|
* Not sure if this is needed...
|
|
*/
|
|
addis r3,0,0x1000
|
|
mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */
|
|
/* execution will continue from the poweron */
|
|
/* vector of 0xfffffffc */
|
|
#endif /* CONFIG_405EP */
|
|
|
|
#if defined(CONFIG_440)
|
|
/*----------------------------------------------------------------------------+
|
|
| mttlb3.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mttlb3)
|
|
TLBWE(4,3,2)
|
|
blr
|
|
function_epilog(mttlb3)
|
|
|
|
/*----------------------------------------------------------------------------+
|
|
| mftlb3.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mftlb3)
|
|
TLBRE(3,3,2)
|
|
blr
|
|
function_epilog(mftlb3)
|
|
|
|
/*----------------------------------------------------------------------------+
|
|
| mttlb2.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mttlb2)
|
|
TLBWE(4,3,1)
|
|
blr
|
|
function_epilog(mttlb2)
|
|
|
|
/*----------------------------------------------------------------------------+
|
|
| mftlb2.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mftlb2)
|
|
TLBRE(3,3,1)
|
|
blr
|
|
function_epilog(mftlb2)
|
|
|
|
/*----------------------------------------------------------------------------+
|
|
| mttlb1.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mttlb1)
|
|
TLBWE(4,3,0)
|
|
blr
|
|
function_epilog(mttlb1)
|
|
|
|
/*----------------------------------------------------------------------------+
|
|
| mftlb1.
|
|
+----------------------------------------------------------------------------*/
|
|
function_prolog(mftlb1)
|
|
TLBRE(3,3,0)
|
|
blr
|
|
function_epilog(mftlb1)
|
|
#endif /* CONFIG_440 */
|
|
|
|
#if defined(CONFIG_NAND_SPL)
|
|
/*
|
|
* void nand_boot_relocate(dst, src, bytes)
|
|
*
|
|
* r3 = Destination address to copy code to (in SDRAM)
|
|
* r4 = Source address to copy code from
|
|
* r5 = size to copy in bytes
|
|
*/
|
|
nand_boot_relocate:
|
|
mr r6,r3
|
|
mr r7,r4
|
|
mflr r8
|
|
|
|
/*
|
|
* Copy SPL from icache into SDRAM
|
|
*/
|
|
subi r3,r3,4
|
|
subi r4,r4,4
|
|
srwi r5,r5,2
|
|
mtctr r5
|
|
..spl_loop:
|
|
lwzu r0,4(r4)
|
|
stwu r0,4(r3)
|
|
bdnz ..spl_loop
|
|
|
|
/*
|
|
* Calculate "corrected" link register, so that we "continue"
|
|
* in execution in destination range
|
|
*/
|
|
sub r3,r7,r6 /* r3 = src - dst */
|
|
sub r8,r8,r3 /* r8 = link-reg - (src - dst) */
|
|
mtlr r8
|
|
blr
|
|
|
|
nand_boot_common:
|
|
/*
|
|
* First initialize SDRAM. It has to be available *before* calling
|
|
* nand_boot().
|
|
*/
|
|
lis r3,CONFIG_SYS_SDRAM_BASE@h
|
|
ori r3,r3,CONFIG_SYS_SDRAM_BASE@l
|
|
bl initdram
|
|
|
|
/*
|
|
* Now copy the 4k SPL code into SDRAM and continue execution
|
|
* from there.
|
|
*/
|
|
lis r3,CONFIG_SYS_NAND_BOOT_SPL_DST@h
|
|
ori r3,r3,CONFIG_SYS_NAND_BOOT_SPL_DST@l
|
|
lis r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@h
|
|
ori r4,r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@l
|
|
lis r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@h
|
|
ori r5,r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@l
|
|
bl nand_boot_relocate
|
|
|
|
/*
|
|
* We're running from SDRAM now!!!
|
|
*
|
|
* It is necessary for 4xx systems to relocate from running at
|
|
* the original location (0xfffffxxx) to somewhere else (SDRAM
|
|
* preferably). This is because CS0 needs to be reconfigured for
|
|
* NAND access. And we can't reconfigure this CS when currently
|
|
* "running" from it.
|
|
*/
|
|
|
|
/*
|
|
* Finally call nand_boot() to load main NAND U-Boot image from
|
|
* NAND and jump to it.
|
|
*/
|
|
bl nand_boot /* will not return */
|
|
#endif /* CONFIG_NAND_SPL */
|