初始提交

2025-06-27 00:32:57 +08:00
commit e40bb2ba8a
5134 changed files with 2158460 additions and 0 deletions
--- a/Project/Src/rt-thread/libcpu/mips/xburst/cache_gcc.S
+++ b/Project/Src/rt-thread/libcpu/mips/xburst/cache_gcc.S
@@ -0,0 +1,42 @@
+/*
+ * File      : cache_init.S
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ */
+#include "../common/mips.inc"
+#include "../common/mipsregs.h"
+#include "../common/stackframe.h"
+
+    .text
+    .set noreorder
+
+    .globl  cache_init
+    .ent    cache_init
+cache_init:
+    .set    noreorder
+    mtc0    zero, CP0_TAGLO
+    move    t0, a0                  // cache total size
+    move    t1, a1                  // cache line size
+    li      t2, 0x80000000
+    addu    t3, t0, t2
+
+_cache_init_loop:
+    cache   8, 0(t2)                // icache_index_store_tag
+    cache   9, 0(t2)                // dcache_index_store_tag
+    addu    t2, t1
+    bne     t2, t3, _cache_init_loop
+    nop
+
+    mfc0    t0, CP0_CONFIG
+    li      t1, 0x7
+    not     t1
+    and     t0, t0, t1
+    or      t0, 0x3                 // cacheable, noncoherent, write-back, write allocate
+    mtc0    t0, CP0_CONFIG
+
+    jr      ra
+    nop
+
+    .set    reorder
+    .end    cache_init