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u-boot/arch/m68k/cpu/mcf5227x/start.S
Wolfgang Denk 25ddd1fb0a Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value 
CONFIG_SYS_GBL_DATA_SIZE has always been just a bad workarond for not
being able to use "sizeof(struct global_data)" in assembler files.
Recent experience has shown that manual synchronization is not
reliable enough.  This patch renames CONFIG_SYS_GBL_DATA_SIZE into
GENERATED_GBL_DATA_SIZE which gets automatically generated by the
asm-offsets tool.  In the result, all definitions of this value can be
deleted from the board config files.  We have to make sure that all
files that reference such data include the new <asm-offsets.h> file.

No other changes have been done yet, but it is obvious that similar
changes / simplifications can be done for other, related macro
definitions as well.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-26 21:05:30 +02:00

514 lines
13 KiB
ArmAsm
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/*
* Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
* Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <asm-offsets.h>
#include <config.h>
#include <timestamp.h>
#include "version.h"
#include <asm/cache.h>
#ifndef CONFIG_IDENT_STRING
#define CONFIG_IDENT_STRING ""
#endif
#define _START _start
#define _FAULT _fault
#define SAVE_ALL \
move.w #0x2700,%sr; /* disable intrs */ \
subl #60,%sp; /* space for 15 regs */ \
moveml %d0-%d7/%a0-%a6,%sp@;
#define RESTORE_ALL \
moveml %sp@,%d0-%d7/%a0-%a6; \
addl #60,%sp; /* space for 15 regs */ \
rte;
#if defined(CONFIG_CF_SBF)
#define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
#endif
.text
/*
* Vector table. This is used for initial platform startup.
* These vectors are to catch any un-intended traps.
*/
_vectors:
#if defined(CONFIG_CF_SBF)
INITSP: .long 0 /* Initial SP */
INITPC: .long ASM_DRAMINIT /* Initial PC */
#else
INITSP: .long 0 /* Initial SP */
INITPC: .long _START /* Initial PC */
#endif
vector02: .long _FAULT /* Access Error */
vector03: .long _FAULT /* Address Error */
vector04: .long _FAULT /* Illegal Instruction */
vector05: .long _FAULT /* Reserved */
vector06: .long _FAULT /* Reserved */
vector07: .long _FAULT /* Reserved */
vector08: .long _FAULT /* Privilege Violation */
vector09: .long _FAULT /* Trace */
vector0A: .long _FAULT /* Unimplemented A-Line */
vector0B: .long _FAULT /* Unimplemented F-Line */
vector0C: .long _FAULT /* Debug Interrupt */
vector0D: .long _FAULT /* Reserved */
vector0E: .long _FAULT /* Format Error */
vector0F: .long _FAULT /* Unitialized Int. */
/* Reserved */
vector10_17:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
vector18: .long _FAULT /* Spurious Interrupt */
vector19: .long _FAULT /* Autovector Level 1 */
vector1A: .long _FAULT /* Autovector Level 2 */
vector1B: .long _FAULT /* Autovector Level 3 */
vector1C: .long _FAULT /* Autovector Level 4 */
vector1D: .long _FAULT /* Autovector Level 5 */
vector1E: .long _FAULT /* Autovector Level 6 */
vector1F: .long _FAULT /* Autovector Level 7 */
#if !defined(CONFIG_CF_SBF)
/* TRAP #0 - #15 */
vector20_2F:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
/* Reserved */
vector30_3F:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
vector64_127:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
vector128_191:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
vector192_255:
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
#endif
#if defined(CONFIG_CF_SBF)
/* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
asm_sbf_img_hdr:
.long 0x00000000 /* checksum, not yet implemented */
.long 0x00020000 /* image length */
.long CONFIG_SYS_TEXT_BASE /* image to be relocated at */
asm_dram_init:
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
movec %d0, %RAMBAR1 /* init Rambar */
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
clr.l %sp@-
/* Must disable global address */
move.l #0xFC008000, %a1
move.l #(CONFIG_SYS_CS0_BASE), (%a1)
move.l #0xFC008008, %a1
move.l #(CONFIG_SYS_CS0_CTRL), (%a1)
move.l #0xFC008004, %a1
move.l #(CONFIG_SYS_CS0_MASK), (%a1)
/*
* Dram Initialization
* a1, a2, and d0
*/
/* mscr sdram */
move.l #0xFC0A4074, %a1
move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1)
nop
/* SDRAM Chip 0 and 1 */
move.l #0xFC0B8110, %a1
move.l #0xFC0B8114, %a2
/* calculate the size */
move.l #0x13, %d1
move.l #(CONFIG_SYS_SDRAM_SIZE), %d2
#ifdef CONFIG_SYS_SDRAM_BASE1
lsr.l #1, %d2
#endif
dramsz_loop:
lsr.l #1, %d2
add.l #1, %d1
cmp.l #1, %d2
bne dramsz_loop
/* SDRAM Chip 0 and 1 */
move.l #(CONFIG_SYS_SDRAM_BASE), (%a1)
or.l %d1, (%a1)
#ifdef CONFIG_SYS_SDRAM_BASE1
move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2)
or.l %d1, (%a2)
#endif
nop
/* dram cfg1 and cfg2 */
move.l #0xFC0B8008, %a1
move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1)
nop
move.l #0xFC0B800C, %a2
move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2)
nop
move.l #0xFC0B8000, %a1 /* Mode */
move.l #0xFC0B8004, %a2 /* Ctrl */
/* Issue PALL */
move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
nop
/* Issue LEMR */
move.l #(CONFIG_SYS_SDRAM_MODE), (%a1)
nop
move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1)
nop
move.l #1000, %d0
wait1000:
nop
subq.l #1, %d0
bne wait1000
/* Issue PALL */
move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
nop
/* Perform two refresh cycles */
move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0
nop
move.l %d0, (%a2)
move.l %d0, (%a2)
nop
move.l #(CONFIG_SYS_SDRAM_CTRL), %d0
and.l #0x7FFFFFFF, %d0
or.l #0x10000c00, %d0
move.l %d0, (%a2)
nop
/*
* DSPI Initialization
* a0 - general, sram - 0x80008000 - 32, see M52277EVB.h
* a1 - dspi status
* a2 - dtfr
* a3 - drfr
* a4 - Dst addr
*/
/* Enable pins for DSPI mode - chip-selects are enabled later */
move.l #0xFC0A4036, %a0
move.b #0x3F, %d0
move.b %d0, (%a0)
/* DSPI CS */
#ifdef CONFIG_SYS_DSPI_CS0
move.b (%a0), %d0
or.l #0xC0, %d0
move.b %d0, (%a0)
#endif
#ifdef CONFIG_SYS_DSPI_CS2
move.l #0xFC0A4037, %a0
move.b (%a0), %d0
or.l #0x10, %d0
move.b %d0, (%a0)
#endif
nop
/* Configure DSPI module */
move.l #0xFC05C000, %a0
move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */
move.l #0xFC05C00C, %a0
move.l #0x3E000011, (%a0)
move.l #0xFC05C034, %a2 /* dtfr */
move.l #0xFC05C03B, %a3 /* drfr */
move.l #(ASM_SBF_IMG_HDR + 4), %a1
move.l (%a1)+, %d5
move.l (%a1), %a4
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0
move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4
move.l #0xFC05C02C, %a1 /* dspi status */
/* Issue commands and address */
move.l #0x8004000B, %d2 /* Fast Read Cmd */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.l #0x80040000, %d2 /* Address byte 2 */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.l #0x80040000, %d2 /* Address byte 1 */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.l #0x80040000, %d2 /* Address byte 0 */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.l #0x80040000, %d2 /* Dummy Wr and Rd */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
/* Transfer serial boot header to sram */
asm_dspi_rd_loop1:
move.l #0x80040000, %d2
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.b %d1, (%a0) /* read, copy to dst */
add.l #1, %a0 /* inc dst by 1 */
sub.l #1, %d4 /* dec cnt by 1 */
bne asm_dspi_rd_loop1
/* Transfer u-boot from serial flash to memory */
asm_dspi_rd_loop2:
move.l #0x80040000, %d2
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
move.b %d1, (%a4) /* read, copy to dst */
add.l #1, %a4 /* inc dst by 1 */
sub.l #1, %d5 /* dec cnt by 1 */
bne asm_dspi_rd_loop2
move.l #0x00040000, %d2 /* Terminate */
jsr asm_dspi_wr_status
jsr asm_dspi_rd_status
/* jump to memory and execute */
move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0
move.l %a0, (%a1)
jmp (%a0)
asm_dspi_wr_status:
move.l (%a1), %d0 /* status */
and.l #0x0000F000, %d0
cmp.l #0x00003000, %d0
bgt asm_dspi_wr_status
move.l %d2, (%a2)
rts
asm_dspi_rd_status:
move.l (%a1), %d0 /* status */
and.l #0x000000F0, %d0
lsr.l #4, %d0
cmp.l #0, %d0
beq asm_dspi_rd_status
move.b (%a3), %d1
rts
#endif /* CONFIG_CF_SBF */
.text
. = 0x400
.globl _start
_start:
nop
nop
move.w #0x2700,%sr /* Mask off Interrupt */
/* Set vector base register at the beginning of the Flash */
#if defined(CONFIG_CF_SBF)
move.l #CONFIG_SYS_TEXT_BASE, %d0
movec %d0, %VBR
#else
move.l #CONFIG_SYS_FLASH_BASE, %d0
movec %d0, %VBR
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
movec %d0, %RAMBAR1
#endif
/* invalidate and disable cache */
move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */
movec %d0, %CACR /* Invalidate cache */
move.l #0, %d0
movec %d0, %ACR0
movec %d0, %ACR1
/* initialize general use internal ram */
move.l #0, %d0
move.l #(ICACHE_STATUS), %a1 /* icache */
move.l #(DCACHE_STATUS), %a2 /* icache */
move.l %d0, (%a1)
move.l %d0, (%a2)
/* set stackpointer to end of internal ram to get some stackspace for
the first c-code */
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
clr.l %sp@-
move.l #__got_start, %a5 /* put relocation table address to a5 */
bsr cpu_init_f /* run low-level CPU init code (from flash) */
bsr board_init_f /* run low-level board init code (from flash) */
/* board_init_f() does not return */
/*------------------------------------------------------------------------------*/
/*
* void relocate_code (addr_sp, gd, addr_moni)
*
* This "function" does not return, instead it continues in RAM
* after relocating the monitor code.
*
* r3 = dest
* r4 = src
* r5 = length in bytes
* r6 = cachelinesize
*/
.globl relocate_code
relocate_code:
link.w %a6,#0
move.l 8(%a6), %sp /* set new stack pointer */
move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
move.l 16(%a6), %a0 /* Save copy of Destination Address */
move.l #CONFIG_SYS_MONITOR_BASE, %a1
move.l #__init_end, %a2
move.l %a0, %a3
/* copy the code to RAM */
1:
move.l (%a1)+, (%a3)+
cmp.l %a1,%a2
bgt.s 1b
/*
* We are done. Do not return, instead branch to second part of board
* initialization, now running from RAM.
*/
move.l %a0, %a1
add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
jmp (%a1)
in_ram:
clear_bss:
/*
* Now clear BSS segment
*/
move.l %a0, %a1
add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a0, %d1
add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
6:
clr.l (%a1)+
cmp.l %a1,%d1
bgt.s 6b
/*
* fix got table in RAM
*/
move.l %a0, %a1
add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a1,%a5 /* * fix got pointer register a5 */
move.l %a0, %a2
add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
7:
move.l (%a1),%d1
sub.l #_start,%d1
add.l %a0,%d1
move.l %d1,(%a1)+
cmp.l %a2, %a1
bne 7b
/* calculate relative jump to board_init_r in ram */
move.l %a0, %a1
add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
/* set parameters for board_init_r */
move.l %a0,-(%sp) /* dest_addr */
move.l %d0,-(%sp) /* gd */
jsr (%a1)
/*------------------------------------------------------------------------------*/
/* exception code */
.globl _fault
_fault:
jmp _fault
.globl _exc_handler
_exc_handler:
SAVE_ALL
movel %sp,%sp@-
bsr exc_handler
addql #4,%sp
RESTORE_ALL
.globl _int_handler
_int_handler:
SAVE_ALL
movel %sp,%sp@-
bsr int_handler
addql #4,%sp
RESTORE_ALL
/*------------------------------------------------------------------------------*/
.globl version_string
version_string:
.ascii U_BOOT_VERSION
.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
.ascii CONFIG_IDENT_STRING, "\0"
.align 4
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