add csrc

2026-02-21 04:20:14 +00:00 · 2023-12-11 21:54:53 +08:00
parent 910ee11168
commit e720a0dfc2
57 changed files with 2621 additions and 2152 deletions
--- a/lab1/csrc/init.S
+++ b/lab1/csrc/init.S
@@ -15,7 +15,7 @@
 .section .text.init
 .globl _start
 _start:
-  li sp, 4096 # Initialize stack pointer
+  li sp, 0x10000000 # Initialize stack pointer
  call main   # Jump to main function
 loop:
  j loop      # Loop forever
@@ -26,6 +26,16 @@ enable_interrupt:
  li t0, 0x1888
  csrrw t1, mstatus, t0 # enable interrupt
  ret
+.globl enable_paging
+enable_paging:
+  li t0, 0x80000005 # ppn << 12 = 0x005000
+  csrw satp, t0
+  ret
+.globl get_mtval
+get_mtval:
+  csrr a0, mtval
+  ret
+
 .globl get_epc
 get_epc:
  csrr a0, mepc