Working SERV cpu

2026-02-22 18:48:17 +01:00
parent ac6aea90b6
commit 5e951f9b61
24 changed files with 534 additions and 157 deletions
--- a/sw/blinky/start.s
+++ b/sw/blinky/start.s
@@ -0,0 +1,23 @@
+.section .text.init
+.globl _start
+.type _start, @function
+
+_start:
+    la sp, __stack_top
+
+    # Zero .bss
+    la t0, __bss_start
+    la t1, __bss_end
+1:
+    bgeu t0, t1, 2f
+    sw zero, 0(t0)
+    addi t0, t0, 4
+    j 1b
+
+2:
+    call main
+
+3:
+    j 3b
+
+.size _start, .-_start