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| author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
|---|---|---|
| committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
| commit | 92988a21ad4c4c9504295ccb580c9f806134471b (patch) | |
| tree | 5effc9f14170112450de05c67dafbe8d5034d595 /u-boot/board/qemu-mips/lowlevel_init.S | |
| parent | ca2b506783b676c95762c54ea24dcfdaae1947c9 (diff) | |
| download | bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.zip bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.gz bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.bz2 | |
added boot script files to repository
Diffstat (limited to 'u-boot/board/qemu-mips/lowlevel_init.S')
| -rw-r--r-- | u-boot/board/qemu-mips/lowlevel_init.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/u-boot/board/qemu-mips/lowlevel_init.S b/u-boot/board/qemu-mips/lowlevel_init.S new file mode 100644 index 0000000..b0f7072 --- /dev/null +++ b/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 |