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#include "../src/bootinfo.h"
/* to be provider by the bootloader including this header */
_Noreturn void bootloader(struct systemid *boot);
__asm__(
".text \n"
".extern __bss_start \n"
".extern __bss_end \n"
".global __start \n"
".type __start, @function \n"
"__start: \n"
/* zero any bss section */
" mov #0, r0 \n"
" mov.l 1f, r1 \n"
" mov.l 2f, r2 \n"
"0: cmp/hi r1, r2 \n"
" bf 0f \n"
" bra 0b \n"
" mov.l r0, @-r2 \n"
/* cannibalize code before this for stack space, and pass control to C */
"0: mov.l 3f, r15 \n"
" mov.l 4f, r4 \n"
" bra bootloader \n"
" nop \n"
".align 2 \n"
"1: .long __bss_start \n"
"2: .long __bss_end \n"
"3: .long __start \n"
"4: .long 0x06002000 \n"
);
/* helper to jump to the specified code with the specified stack */
static inline _Noreturn void jump(const void *code, long *stack)
{
__asm__ __volatile__(
" jmp @%0\n"
" mov %1, r15\n"
: : "r"(code), "r"(stack)
);
__builtin_unreachable();
}
/* helper to abort by repeatedly executing an illegal instruction */
static inline _Noreturn void fail(void)
{
__asm__ __volatile__(
"0: bra 0b\n"
" .word 0xfffd\n"
);
__builtin_unreachable();
}
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