50 lines
868 B
C
50 lines
868 B
C
#include <am.h>
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#include <riscv/riscv.h>
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#include <klib.h>
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static Context* (*user_handler)(Event, Context*) = NULL;
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Context* __am_irq_handle(Context *c) {
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if (user_handler) {
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Event ev = {0};
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switch (c->mcause) {
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default: ev.event = EVENT_ERROR; break;
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}
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c = user_handler(ev, c);
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assert(c != NULL);
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}
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return c;
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}
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extern void __am_asm_trap(void);
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bool cte_init(Context*(*handler)(Event, Context*)) {
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// initialize exception entry
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asm volatile("csrw mtvec, %0" : : "r"(__am_asm_trap));
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// register event handler
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user_handler = handler;
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return true;
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}
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Context *kcontext(Area kstack, void (*entry)(void *), void *arg) {
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return NULL;
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}
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void yield() {
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#ifdef __riscv_e
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asm volatile("li a5, -1; ecall");
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#else
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asm volatile("li a7, -1; ecall");
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#endif
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}
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bool ienabled() {
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return false;
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}
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void iset(bool enable) {
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}
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