Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / qemu-mips / lowlevel_init.S

diff --git a/qemu/roms/u-boot/board/qemu-mips/lowlevel_init.S b/qemu/roms/u-boot/board/qemu-mips/lowlevel_init.S
new file mode 100644 (file)
index 0000000..b0f7072
--- /dev/null
+++ b/qemu/roms/u-boot/board/qemu-mips/lowlevel_init.S
@@ -0,0 +1,40 @@
+/* Memory sub-system initialization code */
+
+#include <config.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+
+       .text
+       .set noreorder
+       .set mips32
+
+       .globl  lowlevel_init
+lowlevel_init:
+
+       /*
+        * Step 2) Establish Status Register
+        * (set BEV, clear ERL, clear EXL, clear IE)
+        */
+       li      t1, 0x00400000
+       mtc0    t1, CP0_STATUS
+
+       /*
+        * Step 3) Establish CP0 Config0
+        * (set K0=3)
+        */
+       li      t1, 0x00000003
+       mtc0    t1, CP0_CONFIG
+
+       /*
+        * Step 7) Establish Cause
+        * (set IV bit)
+        */
+       li      t1, 0x00800000
+       mtc0    t1, CP0_CAUSE
+
+       /* Establish Wired (and Random) */
+       mtc0    zero, CP0_WIRED
+       nop
+
+       jr      ra
+       nop