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-rw-r--r--cpu/arm1136/start.S42
1 files changed, 42 insertions, 0 deletions
diff --git a/cpu/arm1136/start.S b/cpu/arm1136/start.S
index 17c7a83..8b765f1 100644
--- a/cpu/arm1136/start.S
+++ b/cpu/arm1136/start.S
@@ -35,6 +35,25 @@
#endif
.globl _start
_start: b reset
+#ifdef CONFIG_ONENAND_IPL
+ 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
@@ -51,6 +70,7 @@ _not_used: .word not_used
_irq: .word irq
_fiq: .word fiq
_pad: .word 0x12345678 /* now 16*4=64 */
+#endif /* CONFIG_ONENAND_IPL */
.global _end_vect
_end_vect:
@@ -139,7 +159,9 @@ 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 */
cmp r0, r1 /* don't reloc during debug */
+#ifndef CONFIG_ONENAND_IPL
beq stack_setup
+#endif /* CONFIG_ONENAND_IPL */
ldr r2, _armboot_start
ldr r3, _bss_start
@@ -156,26 +178,36 @@ copy_loop:
/* Set up the stack */
stack_setup:
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
+#ifdef CONFIG_ONENAND_IPL
+ sub sp, r0, #128 /* leave 32 words for abort-stack */
+#else
sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
#ifdef CONFIG_USE_IRQ
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+#endif /* CONFIG_ONENAND_IPL */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
ldr r1, _bss_end /* stop here */
mov r2, #0x00000000 /* clear */
+#ifndef CONFIG_ONENAND_IPL
clbss_l:str r2, [r0] /* clear loop... */
add r0, r0, #4
cmp r0, r1
bne clbss_l
+#endif
ldr pc, _start_armboot
+#ifdef CONFIG_ONENAND_IPL
+_start_armboot: .word start_oneboot
+#else
_start_armboot: .word start_armboot
+#endif
/*
@@ -214,6 +246,8 @@ cpu_init_crit:
bl lowlevel_init /* go setup pll,mux,memory */
mov lr, ip /* restore link */
mov pc, lr /* back to my caller */
+
+#ifndef CONFIG_ONENAND_IPL
/*
*************************************************************************
*
@@ -326,10 +360,17 @@ cpu_init_crit:
.macro get_fiq_stack @ setup FIQ stack
ldr sp, FIQ_STACK_START
.endm
+#endif /* CONFIG_ONENAND_IPL */
/*
* exception handlers
*/
+#ifdef CONFIG_ONENAND_IPL
+ .align 5
+do_hang:
+ ldr sp, _TEXT_BASE /* use 32 words about stack */
+ bl hang /* hang and never return */
+#else /* !CONFIG_ONENAND IPL */
.align 5
undefined_instruction:
get_bad_stack
@@ -415,3 +456,4 @@ rstctl:
.word PM_RSTCTRL_WKUP
#endif
+#endif /* CONFIG_ONENAND_IPL */