MIPS:Target support for qemu -M mips
[platform/kernel/u-boot.git] / board / qemu-mips / lowlevel_init.S
1 /* Memory sub-system initialization code */
2
3 #include <config.h>
4 #include <version.h>
5 #include <asm/regdef.h>
6 #include <asm/mipsregs.h>
7
8         .text
9         .set noreorder
10         .set mips32
11
12         .globl  lowlevel_init
13 lowlevel_init:
14
15         /*
16          * Step 2) Establish Status Register
17          * (set BEV, clear ERL, clear EXL, clear IE)
18          */
19         li      t1, 0x00400000
20         mtc0    t1, CP0_STATUS
21
22         /*
23          * Step 3) Establish CP0 Config0
24          * (set K0=3)
25          */
26         li      t1, 0x00000003
27         mtc0    t1, CP0_CONFIG
28
29         /*
30          * Step 7) Establish Cause
31          * (set IV bit)
32          */
33         li      t1, 0x00800000
34         mtc0    t1, CP0_CAUSE
35
36         /* Establish Wired (and Random) */
37         mtc0    zero, CP0_WIRED
38         nop
39
40         j       ra
41         nop