diff options
Diffstat (limited to 'target/image/generic/lzma-loader/src/start.S')
| -rw-r--r-- | target/image/generic/lzma-loader/src/start.S | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/target/image/generic/lzma-loader/src/start.S b/target/image/generic/lzma-loader/src/start.S deleted file mode 100644 index 9a85c4c35..000000000 --- a/target/image/generic/lzma-loader/src/start.S +++ /dev/null @@ -1,160 +0,0 @@ -#include <asm/asm.h> -#include <asm/regdef.h> - -#define KSEG0 0x80000000 - -#define C0_CONFIG $16 -#define C0_TAGLO $28 -#define C0_TAGHI $29 - -#define CONF1_DA_SHIFT 7 /* D$ associativity */ -#define CONF1_DA_MASK 0x00000380 -#define CONF1_DA_BASE 1 -#define CONF1_DL_SHIFT 10 /* D$ line size */ -#define CONF1_DL_MASK 0x00001c00 -#define CONF1_DL_BASE 2 -#define CONF1_DS_SHIFT 13 /* D$ sets/way */ -#define CONF1_DS_MASK 0x0000e000 -#define CONF1_DS_BASE 64 -#define CONF1_IA_SHIFT 16 /* I$ associativity */ -#define CONF1_IA_MASK 0x00070000 -#define CONF1_IA_BASE 1 -#define CONF1_IL_SHIFT 19 /* I$ line size */ -#define CONF1_IL_MASK 0x00380000 -#define CONF1_IL_BASE 2 -#define CONF1_IS_SHIFT 22 /* Instruction cache sets/way */ -#define CONF1_IS_MASK 0x01c00000 -#define CONF1_IS_BASE 64 - -#define Index_Invalidate_I 0x00 -#define Index_Writeback_Inv_D 0x01 - -LEAF(_start) - - .set mips32 - .set noreorder - - /* save argument registers */ - move t4, a0 - move t5, a1 - move t6, a2 - move t7, a3 - - /* set up stack */ - li sp, 0xa0000000 + RAMSIZE - 16 - -#ifdef IMAGE_COPY - /* Copy decompressor code to the right place */ - li t2, LOADADDR - add a0, t2, 0 - la a1, code_start - la a2, code_stop -$L1: - lw t0, 0(a1) - sw t0, 0(a0) - add a1, 4 - add a0, 4 - blt a1, a2, $L1 - nop -#endif - - /* At this point we need to invalidate dcache and */ - /* icache before jumping to new code */ - -1: /* Get cache sizes */ - mfc0 s0,C0_CONFIG,1 - - li s1,CONF1_DL_MASK - and s1,s0 - beq s1,zero,nodc - nop - - srl s1,CONF1_DL_SHIFT - li t0,CONF1_DL_BASE - sll s1,t0,s1 /* s1 has D$ cache line size */ - - li s2,CONF1_DA_MASK - and s2,s0 - srl s2,CONF1_DA_SHIFT - addiu s2,CONF1_DA_BASE /* s2 now has D$ associativity */ - - li t0,CONF1_DS_MASK - and t0,s0 - srl t0,CONF1_DS_SHIFT - li s3,CONF1_DS_BASE - sll s3,s3,t0 /* s3 has D$ sets per way */ - - multu s2,s3 /* sets/way * associativity */ - mflo t0 /* total cache lines */ - - multu s1,t0 /* D$ linesize * lines */ - mflo s2 /* s2 is now D$ size in bytes */ - - /* Initilize the D$: */ - mtc0 zero,C0_TAGLO - mtc0 zero,C0_TAGHI - - li t0,KSEG0 /* Just an address for the first $ line */ - addu t1,t0,s2 /* + size of cache == end */ - -1: cache Index_Writeback_Inv_D,0(t0) - bne t0,t1,1b - addu t0,s1 - -nodc: - /* Now we get to do it all again for the I$ */ - - move s3,zero /* just in case there is no icache */ - move s4,zero - - li t0,CONF1_IL_MASK - and t0,s0 - beq t0,zero,noic - nop - - srl t0,CONF1_IL_SHIFT - li s3,CONF1_IL_BASE - sll s3,t0 /* s3 has I$ cache line size */ - - li t0,CONF1_IA_MASK - and t0,s0 - srl t0,CONF1_IA_SHIFT - addiu s4,t0,CONF1_IA_BASE /* s4 now has I$ associativity */ - - li t0,CONF1_IS_MASK - and t0,s0 - srl t0,CONF1_IS_SHIFT - li s5,CONF1_IS_BASE - sll s5,t0 /* s5 has I$ sets per way */ - - multu s4,s5 /* sets/way * associativity */ - mflo t0 /* s4 is now total cache lines */ - - multu s3,t0 /* I$ linesize * lines */ - mflo s4 /* s4 is cache size in bytes */ - - /* Initilize the I$: */ - mtc0 zero,C0_TAGLO - mtc0 zero,C0_TAGHI - - li t0,KSEG0 /* Just an address for the first $ line */ - addu t1,t0,s4 /* + size of cache == end */ - -1: cache Index_Invalidate_I,0(t0) - bne t0,t1,1b - addu t0,s3 -noic: - /* jump to main */ - move a0,s3 /* icache line size */ - move a1,s4 /* icache size */ - move a2,s1 /* dcache line size */ -#ifdef IMAGE_COPY - jal t2 -#else - jal entry -#endif - move a3,s2 /* dcache size */ - - .set reorder -END(_start) - |