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PXA: Add OneNAND booting support to start.S

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Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
This commit is contained in:
Marek Vasut 2010-07-06 02:48:35 +02:00
parent 8c77f232f0
commit 5ab877b688
1 changed files with 43 additions and 5 deletions
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48
arch/arm/cpu/pxa/start.S
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@ -34,6 +34,25 @@
.globl _start
_start: b reset
#ifdef CONFIG_PRELOADER
ldr pc, _hang
ldr pc, _hang
ldr pc, _hang
ldr pc, _hang
ldr pc, _hang
ldr pc, _hang
ldr pc, _hang
_hang:
.word do_hang
.word 0x12345678
.word 0x12345678
.word 0x12345678
.word 0x12345678
.word 0x12345678
.word 0x12345678
.word 0x12345678 /* now 16*4=64 */
#else
ldr pc, _undefined_instruction
ldr pc, _software_interrupt
ldr pc, _prefetch_abort
@ -49,6 +68,7 @@ _data_abort: .word data_abort
_not_used: .word not_used
_irq: .word irq
_fiq: .word fiq
#endif /* CONFIG_PRELOADER */
.balignl 16,0xdeadbeef
@ -117,8 +137,10 @@ reset:
relocate: /* relocate U-Boot to RAM */
adr r0, _start /* r0 <- current position of code */
ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
#ifndef CONFIG_PRELOADER
cmp r0, r1 /* don't reloc during debug */
beq stack_setup
#endif
ldr r2, _armboot_start
ldr r3, _bss_start
@ -135,28 +157,37 @@ copy_loop:
/* Set up the stack */
stack_setup:
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
#ifdef CONFIG_PRELOADER
sub sp, r0, #128 /* leave 32 words for abort-stack */
#else
sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
#ifdef CONFIG_USE_IRQ
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif /* CONFIG_USE_IRQ */
sub sp, r0, #12 /* leave 3 words for abort-stack */
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
#endif
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
ldr r1, _bss_end /* stop here */
mov r2, #0x00000000 /* clear */
#ifndef CONFIG_PRELOADER
clbss_l:str r2, [r0] /* clear loop... */
add r0, r0, #4
cmp r0, r1
ble clbss_l
#endif
ldr pc, _start_armboot
#ifdef CONFIG_ONENAND_IPL
_start_armboot: .word start_oneboot
#else
_start_armboot: .word start_armboot
#endif
/****************************************************************************/
/* */
@ -296,7 +327,7 @@ setspeed_done:
*/
mov pc, lr
#ifndef CONFIG_PRELOADER
/****************************************************************************/
/* */
/* Interrupt handling */
@ -394,6 +425,7 @@ setspeed_done:
.macro get_fiq_stack @ setup FIQ stack
ldr sp, FIQ_STACK_START
.endm
#endif /* CONFIG_PRELOADER */
/****************************************************************************/
@ -402,6 +434,12 @@ setspeed_done:
/* */
/****************************************************************************/
#ifdef CONFIG_PRELOADER
.align 5
do_hang:
ldr sp, _TEXT_BASE /* use 32 words abort stack */
bl hang /* hang and never return */
#else /* !CONFIG_PRELOADER */
.align 5
undefined_instruction:
get_bad_stack
@ -461,7 +499,7 @@ fiq:
get_bad_stack
bad_save_user_regs
bl do_fiq
#endif /* CONFIG_PRELOADER */
#endif /* CONFIG_USE_IRQ */
/****************************************************************************/