mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 05:04:26 +00:00
941338725d
This is an init function so move it out of the common header. Avoid using the typedef so that we don't have to include the global_data header file. Also tidy up the function style in comments while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
274 lines
7 KiB
ArmAsm
274 lines
7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
|
|
* Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
|
|
*
|
|
* (C) Copyright 2004-2008 Freescale Semiconductor, Inc.
|
|
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include "version.h"
|
|
#include <asm/cache.h>
|
|
|
|
#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_MONITOR_IS_IN_RAM)
|
|
|
|
.text
|
|
|
|
/*
|
|
* Vector table. This is used for initial platform startup.
|
|
* These vectors are to catch any un-intended traps.
|
|
*/
|
|
_vectors:
|
|
INITSP: .long 0x00000000 /* Initial SP */
|
|
INITPC: .long _START /* Initial PC */
|
|
|
|
vector02_0F:
|
|
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
|
|
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
|
|
|
|
/* Reserved */
|
|
vector10_17:
|
|
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
|
|
|
|
vector18_1F:
|
|
.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
|
|
|
|
/* 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 /* !defined(CONFIG_MONITOR_IS_IN_RAM) */
|
|
|
|
.text
|
|
|
|
.globl _start
|
|
_start:
|
|
nop
|
|
nop
|
|
move.w #0x2700,%sr /* Mask off Interrupt */
|
|
|
|
#if !defined(CONFIG_MONITOR_IS_IN_RAM)
|
|
/* Set vector base register at the beginning of the Flash */
|
|
move.l #CONFIG_SYS_FLASH_BASE, %d0
|
|
movec %d0, %VBR
|
|
#endif
|
|
|
|
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
|
|
movec %d0, %RAMBAR1
|
|
|
|
/* invalidate and disable cache */
|
|
move.l #CF_CACR_CINVA, %d0 /* Invalidate cache cmd */
|
|
movec %d0, %CACR /* Invalidate cache */
|
|
move.l #0, %d0
|
|
movec %d0, %ACR0
|
|
movec %d0, %ACR1
|
|
|
|
#ifdef CONFIG_MCF5301x
|
|
move.l #(0xFC0a0010), %a0
|
|
move.w (%a0), %d0
|
|
and.l %d0, 0xEFFF
|
|
|
|
move.w %d0, (%a0)
|
|
#endif
|
|
|
|
/* 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)
|
|
|
|
/* put relocation table address to a5 */
|
|
move.l #__got_start, %a5
|
|
|
|
/* setup stack initially on top of internal static ram */
|
|
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
|
|
|
|
/*
|
|
* if configured, malloc_f arena will be reserved first,
|
|
* then (and always) gd struct space will be reserved
|
|
*/
|
|
move.l %sp, -(%sp)
|
|
move.l #board_init_f_alloc_reserve, %a1
|
|
jsr (%a1)
|
|
|
|
/* update stack and frame-pointers */
|
|
move.l %d0, %sp
|
|
move.l %sp, %fp
|
|
|
|
/* initialize reserved area */
|
|
move.l %d0, -(%sp)
|
|
move.l #board_init_f_init_reserve, %a1
|
|
jsr (%a1)
|
|
|
|
/* run low-level CPU init code (from flash) */
|
|
move.l #cpu_init_f, %a1
|
|
jsr (%a1)
|
|
|
|
/* run low-level board init code (from flash) */
|
|
clr.l %sp@-
|
|
move.l #board_init_f, %a1
|
|
jsr (%a1)
|
|
|
|
/* 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:
|
|
bra _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_STRING, "\0"
|
|
.align 4
|