30 lines
702 B
C
30 lines
702 B
C
typedef unsigned char uint8_t;
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typedef unsigned int uint32_t;
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typedef uint32_t size_t;
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extern char __bss[], __bss_end[], __stack_top[];
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void *memset(void *buf, char c, size_t n) {
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uint8_t *p = (uint8_t *) buf;
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while (n--)
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*p++ = c;
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return buf;
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}
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void kernel_main(void) {
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memset(__bss, 0, (size_t) __bss_end - (size_t) __bss);
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for (;;);
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}
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__attribute__((section(".text.boot")))
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__attribute__((naked))
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void boot(void) {
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__asm__ __volatile__(
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"mv sp, %[stack_top]\n" // Set stacker point
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"j kernel_main\n" // Jump to the kernel function
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:
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: [stack_top] "r" (__stack_top) // Pass the stack top address as %[stack_top]
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);
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}
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