63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#include "calls.h"
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extern char __bss[], __bss_end[], __stack_top[];
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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"
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"j kernel_main\n"
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:
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: [stack_top] "r" (__stack_top)
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);
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}
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sbiret sbi_call(long arg0, long arg1, long arg2, long arg3, long arg4,
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long arg5, long fid, long eid) {
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register long a0 __asm__("a0") = arg0;
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register long a1 __asm__("a1") = arg1;
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register long a2 __asm__("a2") = arg2;
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register long a3 __asm__("a3") = arg3;
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register long a4 __asm__("a4") = arg4;
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register long a5 __asm__("a5") = arg5;
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register long a6 __asm__("a6") = fid;
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register long a7 __asm__("a7") = eid;
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__asm__ __volatile__ ("ecall"
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: "=r"(a0), "=r"(a1)
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: "r"(a0), "r"(a1), "r"(a2), "r"(a3),
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"r"(a4), "r"(a5), "r"(a6), "r"(a7)
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: "memory");
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return (sbiret){ .error = a0, .value = a1 };
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}
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void putchar(char ch) {
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sbi_call(ch, 0, 0, 0, 0, 0, 0, 0x1 /* Console Putchar */);
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}
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int getchar(void) {
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sbiret r = sbi_call(0, 0, 0, 0, 0, 0, 0, 0x2);
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return r.error;
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}
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void sbi_shutdown(void) {
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sbi_call(0, 0, 0, 0, 0, 0, 0, 0x8);
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}
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sbiret sbi_get_impl_id(void) {
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return sbi_call(0, 0, 0, 0, 0, 0, 0x1, 0x10);
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}
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sbiret sbi_get_spec_version(void) {
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return sbi_call(0, 0, 0, 0, 0, 0, 0x2, 0x10);
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}
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sbiret sbi_hart_stop(void) {
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return sbi_call(0, 0, 0, 0, 0, 0, 0x1, 0x48534D);
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}
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sbiret sbi_hart_get_status(unsigned long hartid) {
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return sbi_call(hartid, 0, 0, 0, 0, 0, 0x2, 0x48534D);
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} |