添加文档图片 部分注释

src/core/kmain.c

@@ -12,7 +12,6 @@ int kmain() {
     proc_init();
     disk_init();
     fs_init();
-    // clean_dwm();
     user_init();
 
     Log("kernel: finish\n");

src/core/mm.c

@@ -4,7 +4,6 @@
 #include "memlayout.h"
 
 extern char kernel_end[];
-// void * kernel_end = 0x10000000 + 0x9000000000000000;
 
 void * kernel_paddr(void * kva){
     if (kva > (void *)kernel_end || kva < KERNBASE){
@@ -62,19 +61,7 @@ lo0 0x0000000000000000
 lo1 0x0000000097fdb193
 hi 0x00000000000fe00c
 */
-// void tlb_handler() {
-    // uint64_t vaddr = r_csr_tlbrbadv();
-    // vaddr &= ~((1<<13)-1);
-    // printf("tlb fill at: %p\n", vaddr);
-    // uint64_t tlbrelo0, tlbrelo1, tlbrehi;
-    // tlbrelo0 = (0 << 12) | 0x1;
-    // tlbrelo1 = (0 << 12) | 0x1;
-    // tlbrehi = vaddr | stlbps;
-    // w_csr_tlbrelo0(tlbrelo0);
-    // w_csr_tlbrelo1(tlbrelo1);
-    // w_csr_tlbrehi(tlbrehi);
-    // tlbfill();
-// }
+
 void dwm_init() {
     w_csr_dwm0(get_dmw_data(0x9000, 1, DMW_PLV0));
     w_csr_dwm1(get_dmw_data(0x0000, 1, DMW_PLV0));
@@ -82,7 +69,9 @@ void dwm_init() {
 }
 
 void tlb_init() {
+    // 防止STLB和MTLB出现同时命中的情况
     w_csr_stlbps(0xE);
+    // 刷新TLB
     asm volatile("invtlb  0x0,$zero,$zero");
     w_csr_asid(0x0U);//todo
 }

src/core/proc.c

@@ -230,15 +230,6 @@ int exec(char *path, char *argv[]) {
     p->context = (void*)sp;
     memset(p->context, '\0', sizeof(struct context));
 
-/* UnixBench:
-        ...
-        ptr_argv1
-        ptr_argv0
-  ->sp  ptr_argc
-        ra (without syscall exit)
-  ->    main() stack
-*/
-
     sp -= sizeof(uint64_t) * (ARGS_MAX+2);
     int argc;
     uint64_t *ustack = (void*)sp;

src/core/trap.c

@@ -22,6 +22,7 @@ void trap_handler() {
     } else if (estat & ecfg & TI_VEC) {
         // timer interrupt
         clock_handler();
+        // 清除时钟中断
         w_csr_ticlr(r_csr_ticlr() | CSR_TICLR_CLR);
     } else {
         era += 4;

src/core/user.c

@@ -21,6 +21,6 @@ void user_init() {
     for (int i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
         exec_file(tests[i]);
     }
-    // exec_file("clone");
+    
     shutdown();
 }

src/core/vm.c

@@ -32,7 +32,7 @@ void vm_init(void)//todo
   // kvmmap(kpgtbl, KERNBASE, kernel_end, KERNBASE, PTE_DEFAULT);
 
   w_csr_pgdl((uint64_t)kpgtbl);
-
+  // 根据设计的虚拟地址划分格式配置相应寄存器
   w_csr_pwcl((PTEWIDTH << 30)|(DIR2WIDTH << 25)|(DIR2BASE << 20)|(DIR1WIDTH << 15)|(DIR1BASE << 10)|(PTWIDTH << 5)|(PTBASE << 0));
   w_csr_pwch((DIR4WIDTH << 18)|(DIR3WIDTH << 6)|(DIR3BASE << 0));
 }