diff options
Diffstat (limited to 'payloads/libpayload/arch/arm')
| -rw-r--r-- | payloads/libpayload/arch/arm/head.S | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/payloads/libpayload/arch/arm/head.S b/payloads/libpayload/arch/arm/head.S index c5c96ea38f..788e328322 100644 --- a/payloads/libpayload/arch/arm/head.S +++ b/payloads/libpayload/arch/arm/head.S @@ -34,14 +34,25 @@ */ ENTRY(_entry) + /* TODO: disable interrupts */ + + /* Clear BSS */ + mov r12, #0 + ldr r2, bss_boundaries + ldr r3, bss_boundaries + 4 + cmp r2, r3 + beq no_bss + + sub r3, #4 /* Account for late condition check. */ +loop: + cmp r2, r3 + str r12, [r2], #4 + blt loop +no_bss: /* Save off the location of the coreboot tables */ ldr r1, 1f str r0, [r1] - /* TODO: disable interrupts */ - - /* TODO: Clear BSS */ - /* Setup new stack */ ldr sp, 2f @@ -59,6 +70,9 @@ ENTRY(_entry) ENDPROC(_entry) .align 4 +bss_boundaries: + .word _edata + .word _end 1: .word cb_header_ptr 2: |