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authorMarek Vasut <marek.vasut@gmail.com>2010-07-06 02:48:35 +0200
committerMarek Vasut <marek.vasut@gmail.com>2010-07-14 22:41:39 +0200
commit5ab877b688983f5926de829cda3f1d65feb57331 (patch)
tree8fe47276410762e9a0955ab02a938537bc223eeb /arch
parent8c77f232f0bfdd846ddd971f8a41b96da7585b66 (diff)
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PXA: Add OneNAND booting support to start.S
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/pxa/start.S48
1 files changed, 43 insertions, 5 deletions
diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index e07c8c2..8010b0e 100644
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -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 */
/****************************************************************************/