mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
756f586a73
- Add support for HIDDEN_DRAGON board - fix endianess problem in driver/rtl1839.c * Patch by Allen Curtis, 21 Oct 2004: support multiple serial ports
152 lines
5.2 KiB
ArmAsm
152 lines
5.2 KiB
ArmAsm
/*
|
|
* (C) Copyright 2001
|
|
* Thomas Koeller, tkoeller@gmx.net
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define __ASSEMBLY__ 1
|
|
#endif
|
|
|
|
#include <config.h>
|
|
#include <asm/processor.h>
|
|
#include <mpc824x.h>
|
|
#include <ppc_asm.tmpl>
|
|
|
|
#if defined(USE_DINK32)
|
|
/* We are running from RAM, so do not clear the MCCR1_MEMGO bit! */
|
|
#define MCCR1VAL ((CFG_ROMNAL << MCCR1_ROMNAL_SHIFT) | (CFG_ROMFAL << MCCR1_ROMFAL_SHIFT) | MCCR1_MEMGO)
|
|
#else
|
|
#define MCCR1VAL (CFG_ROMNAL << MCCR1_ROMNAL_SHIFT) | (CFG_ROMFAL << MCCR1_ROMFAL_SHIFT)
|
|
#endif
|
|
|
|
.text
|
|
|
|
/* Values to program into memory controller registers */
|
|
tbl: .long MCCR1, MCCR1VAL
|
|
.long MCCR2, CFG_REFINT << MCCR2_REFINT_SHIFT
|
|
.long MCCR3
|
|
.long (((CFG_BSTOPRE & 0x000000f0) >> 4) << MCCR3_BSTOPRE2TO5_SHIFT) | \
|
|
(CFG_REFREC << MCCR3_REFREC_SHIFT) | \
|
|
(CFG_RDLAT << MCCR3_RDLAT_SHIFT)
|
|
.long MCCR4
|
|
.long (CFG_PRETOACT << MCCR4_PRETOACT_SHIFT) | (CFG_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) | \
|
|
(CFG_REGISTERD_TYPE_BUFFER << 20) | \
|
|
(((CFG_BSTOPRE & 0x00000300) >> 8) << MCCR4_BSTOPRE0TO1_SHIFT ) | \
|
|
((CFG_SDMODE_CAS_LAT << 4) | (CFG_SDMODE_WRAP << 3) | \
|
|
(CFG_SDMODE_BURSTLEN) << MCCR4_SDMODE_SHIFT) | \
|
|
(CFG_ACTTORW << MCCR4_ACTTORW_SHIFT) | \
|
|
((CFG_BSTOPRE & 0x0000000f) << MCCR4_BSTOPRE6TO9_SHIFT )
|
|
.long MSAR1
|
|
.long (((CFG_BANK0_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK1_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK2_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK3_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24)
|
|
.long EMSAR1
|
|
.long (((CFG_BANK0_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK1_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK2_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK3_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24)
|
|
.long MSAR2
|
|
.long (((CFG_BANK4_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK5_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK6_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK7_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24)
|
|
.long EMSAR2
|
|
.long (((CFG_BANK4_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK5_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK6_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK7_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24)
|
|
.long MEAR1
|
|
.long (((CFG_BANK0_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK1_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK2_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK3_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24)
|
|
.long EMEAR1
|
|
.long (((CFG_BANK0_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK1_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK2_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK3_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24)
|
|
.long MEAR2
|
|
.long (((CFG_BANK4_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK5_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK6_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK7_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24)
|
|
.long EMEAR2
|
|
.long (((CFG_BANK4_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 0) | \
|
|
(((CFG_BANK5_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) | \
|
|
(((CFG_BANK6_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) | \
|
|
(((CFG_BANK7_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24)
|
|
.long 0
|
|
|
|
|
|
/*
|
|
* Early CPU initialization. Set up memory controller, so we can access any RAM at all. This
|
|
* must be done in assembly, since we have no stack at this point.
|
|
*/
|
|
.global early_init_f
|
|
early_init_f:
|
|
mflr r10
|
|
|
|
/* basic memory controller configuration */
|
|
lis r3, CONFIG_ADDR_HIGH
|
|
lis r4, CONFIG_DATA_HIGH
|
|
bl lab
|
|
lab: mflr r5
|
|
lwzu r0, tbl - lab(r5)
|
|
loop: lwz r1, 4(r5)
|
|
stwbrx r0, 0, r3
|
|
eieio
|
|
stwbrx r1, 0, r4
|
|
eieio
|
|
lwzu r0, 8(r5)
|
|
cmpli cr0, 0, r0, 0
|
|
bne cr0, loop
|
|
|
|
/* set bank enable bits */
|
|
lis r0, MBER@h
|
|
ori r0, 0, MBER@l
|
|
li r1, CFG_BANK_ENABLE
|
|
stwbrx r0, 0, r3
|
|
eieio
|
|
stb r1, 0(r4)
|
|
eieio
|
|
|
|
/* delay loop */
|
|
lis r0, 0x0003
|
|
mtctr r0
|
|
delay: bdnz delay
|
|
|
|
/* enable memory controller */
|
|
lis r0, MCCR1@h
|
|
ori r0, 0, MCCR1@l
|
|
stwbrx r0, 0, r3
|
|
eieio
|
|
lwbrx r0, 0, r4
|
|
oris r0, 0, MCCR1_MEMGO@h
|
|
stwbrx r0, 0, r4
|
|
eieio
|
|
|
|
/* set up stack pointer */
|
|
lis r1, CFG_INIT_SP_OFFSET@h
|
|
ori r1, r1, CFG_INIT_SP_OFFSET@l
|
|
|
|
mtlr r10
|
|
blr
|