diff options
Diffstat (limited to 'arch/arm/cpu/pxa/start.S')
| -rw-r--r-- | arch/arm/cpu/pxa/start.S | 48 |
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 */ /****************************************************************************/ |