diff options
| author | Vlad Lungu <vlad@comsys.ro> | 2008-01-16 19:27:51 +0200 |
|---|---|---|
| committer | Shinya Kuribayashi <skuribay@ruby.dti.ne.jp> | 2008-01-17 08:28:08 +0900 |
| commit | 0764c164fed6277d359cf132d55187ea34290114 (patch) | |
| tree | f6862e709f1ce4f12a0e5dd0cf9746fa5f7d88c7 /board/qemu-mips/lowlevel_init.S | |
| parent | 4c9e98ace78e7de972adf7da7135a46ec0a4ee7e (diff) | |
MIPS:Target support for qemu -M mips
With serial, NE2000, IDE support. Tested in big-endian mode.
Memory size hard-coded to 128M for now, so don't play with
the -m option.
Signed-off-by: Vlad Lungu <vlad@comsys.ro>
Diffstat (limited to 'board/qemu-mips/lowlevel_init.S')
| -rw-r--r-- | board/qemu-mips/lowlevel_init.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/board/qemu-mips/lowlevel_init.S b/board/qemu-mips/lowlevel_init.S new file mode 100644 index 000000000..28166bceb --- /dev/null +++ b/board/qemu-mips/lowlevel_init.S @@ -0,0 +1,41 @@ +/* Memory sub-system initialization code */ + +#include <config.h> +#include <version.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 + + j ra + nop |