diff options
Diffstat (limited to 'target/linux/adm5120/image/lzma-loader/src/head.S')
| -rw-r--r-- | target/linux/adm5120/image/lzma-loader/src/head.S | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/target/linux/adm5120/image/lzma-loader/src/head.S b/target/linux/adm5120/image/lzma-loader/src/head.S deleted file mode 100644 index ee8b320..0000000 --- a/target/linux/adm5120/image/lzma-loader/src/head.S +++ /dev/null @@ -1,209 +0,0 @@ -/* Copyright 2007 Gabor Juhos <juhosg@freemail.hu> */ -/* keep original values of the a0,a1,a2,a3 registers */ -/* modifed to support user defined entry point address */ -/* Copyright 2005 Oleg I. Vdovikin (oleg@cs.msu.su) */ -/* cache manipulation adapted from Broadcom code */ -/* idea taken from original bunzip2 decompressor code */ -/* Copyright 2004 Manuel Novoa III (mjn3@codepoet.org) */ -/* Licensed under the linux kernel's version of the GPL.*/ - -#include <asm/asm.h> -#include <asm/regdef.h> - -#define KSEG0 0x80000000 - -#define C0_STATUS $12 -#define C0_CAUSE $13 -#define C0_CONFIG $16 -#define C0_WATCHLO $18 -#define C0_WATCHHI $19 -#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 - - .text - -#if (LZMA_STARTUP_ORG) - .set noreorder - - b startup - nop - - .org LZMA_STARTUP_ORG -#endif - -LEAF(startup) - .set noreorder - .set mips32 - - mtc0 zero, C0_WATCHLO # clear watch registers - mtc0 zero, C0_WATCHHI - - mtc0 zero, C0_CAUSE # clear before writing status register - - mfc0 t0, C0_STATUS # get status register - li t1, ~(0xFF01) - and t0, t1 # mask interrupts - mtc0 t0, C0_STATUS # set up status register - - move t1, ra # save return address - la t0, __reloc_label # get linked address of label - bal __reloc_label # branch and link to label to - nop # get actual address -__reloc_label: - subu t0, ra, t0 # get reloc_delta - move ra, t1 # restore return address - - beqz t0, __reloc_end # if delta is 0 we are in the right place - nop - - /* Copy our code to the right place */ - la t1, _code_start # get linked address of _code_start - la t2, _code_end # get linked address of _code_end - addu t0, t0, t1 # calculate actual address of _code_start - -__reloc_copy: - lw t3, 0(t0) - sw t3, 0(t1) - add t1, 4 - blt t1, t2, __reloc_copy - add t0, 4 - -__reloc_end: - - /* At this point we need to invalidate dcache and */ - /* icache before jumping to new code */ - -1: /* Get cache sizes */ - .set mips32 - mfc0 s0,C0_CONFIG,1 - .set mips0 - - 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 */ - - .set mips3 -1: cache Index_Writeback_Inv_D,0(t0) - .set mips0 - 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 */ - - .set mips3 -1: cache Index_Invalidate_I,0(t0) - .set mips0 - bne t0,t1,1b - addu t0,s3 - -noic: - /* Setup new "C" stack */ - la sp, _stack - - addiu sp, -32 /* reserve stack for parameters */ -#if 0 - sw a0, 0(sp) - sw a1, 4(sp) - sw a2, 8(sp) - sw a3, 12(sp) -#endif - sw s3, 16(sp) /* icache line size */ - sw s4, 20(sp) /* icache size */ - sw s1, 24(sp) /* dcache line size */ - sw s2, 28(sp) /* dcache size */ - - /* jump to the decompressor routine */ - la t0, decompress_entry - jr t0 - nop - - .set reorder -END(startup) |