diff options
Diffstat (limited to 'roms/u-boot/examples/api/crt0.S')
| -rw-r--r-- | roms/u-boot/examples/api/crt0.S | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/roms/u-boot/examples/api/crt0.S b/roms/u-boot/examples/api/crt0.S new file mode 100644 index 000000000..57bba9d85 --- /dev/null +++ b/roms/u-boot/examples/api/crt0.S @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2007 Semihalf + * + * Written by: Rafal Jaworowski <raj@semihalf.com> + */ + +#if defined(CONFIG_PPC) + + .text + .globl _start +_start: + lis %r11, search_hint@ha + addi %r11, %r11, search_hint@l + stw %r1, 0(%r11) + b main + + + .globl syscall +syscall: + lis %r11, syscall_ptr@ha + addi %r11, %r11, syscall_ptr@l + lwz %r11, 0(%r11) + mtctr %r11 + bctr + +#elif defined(CONFIG_ARM) + + .text + .globl _start +_start: + ldr ip, =search_hint + str sp, [ip] + b main + + + .globl syscall +syscall: + ldr ip, =syscall_ptr + ldr pc, [ip] + +#elif defined(CONFIG_MIPS) +#include <asm/asm.h> + .text + .globl __start + .ent __start +__start: + PTR_S $sp, search_hint + b main + .end __start + + .globl syscall + .ent syscall +syscall: + PTR_S $ra, return_addr + PTR_L $t9, syscall_ptr + jalr $t9 + nop + PTR_L $ra, return_addr + jr $ra + nop + .end syscall + +return_addr: + .align 8 + .long 0 +#else +#error No support for this arch! +#endif + + .globl syscall_ptr +syscall_ptr: + .align 8 + .long 0 + + .globl search_hint +search_hint: + .long 0 |