diff options
Diffstat (limited to 'cpu/ixp/start.S')
| -rw-r--r-- | cpu/ixp/start.S | 60 |
1 files changed, 16 insertions, 44 deletions
diff --git a/cpu/ixp/start.S b/cpu/ixp/start.S index d5fc9bf..09ecc73 100644 --- a/cpu/ixp/start.S +++ b/cpu/ixp/start.S @@ -101,42 +101,15 @@ _armboot_start: .word _start /* - * Note: _armboot_end_data and _armboot_end are defined - * by the (board-dependent) linker script. - * _armboot_end_data is the first usable FLASH address after armboot - */ -.globl _armboot_end_data -_armboot_end_data: - .word armboot_end_data -.globl _armboot_end -_armboot_end: - .word armboot_end - -/* - * This is defined in the board specific linker script + * These are defined in the board-specific linker script. */ .globl _bss_start _bss_start: - .word bss_start + .word __bss_start .globl _bss_end _bss_end: - .word bss_end - -/* - * _armboot_real_end is the first usable RAM address behind armboot - * and the various stacks - */ -.globl _armboot_real_end -_armboot_real_end: - .word 0x0badc0de - -/* - * We relocate uboot to this address (end of RAM - 128 KiB) - */ -.globl _uboot_reloc -_uboot_reloc: - .word TEXT_BASE + .word _end #ifdef CONFIG_USE_IRQ /* IRQ stack memory (calculated at run-time) */ @@ -294,7 +267,7 @@ relocate: /* relocate U-Boot to RAM */ beq stack_setup ldr r2, _armboot_start - ldr r3, _armboot_end + ldr r3, _bss_start sub r2, r3, r2 /* r2 <- size of armboot */ add r2, r0, r2 /* r2 <- source end address */ @@ -305,16 +278,16 @@ copy_loop: ble copy_loop /* Set up the stack */ - stack_setup: - - ldr r0, _uboot_reloc /* upper 128 KiB: relocated uboot */ - sub r0, r0, #CFG_MALLOC_LEN /* malloc area */ - /* FIXME: bdinfo should be here */ + ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */ + 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 */ clear_bss: - ldr r0, _bss_start /* find start of bss segment */ add r0, r0, #4 /* start at first byte of bss */ ldr r1, _bss_end /* stop here */ @@ -325,7 +298,6 @@ clbss_l:str r2, [r0] /* clear loop... */ cmp r0, r1 bne clbss_l - ldr pc, _start_armboot _start_armboot: .word start_armboot @@ -370,9 +342,9 @@ _start_armboot: .word start_armboot stmia sp, {r0 - r12} /* Calling r0-r12 */ add r8, sp, #S_PC - ldr r2, _armboot_end - add r2, r2, #CONFIG_STACKSIZE - sub r2, r2, #8 + ldr r2, _armboot_start + sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN) + sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack ldmia r2, {r2 - r4} /* get pc, cpsr, old_r0 */ add r0, sp, #S_FRAME_SIZE /* restore sp_SVC */ @@ -407,9 +379,9 @@ _start_armboot: .word start_armboot .endm .macro get_bad_stack - ldr r13, _armboot_end @ setup our mode stack - add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack - sub r13, r13, #8 + ldr r13, _armboot_start @ setup our mode stack + sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN) + sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack str lr, [r13] @ save caller lr / spsr mrs lr, spsr |