diff options
Diffstat (limited to 'openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch')
| -rw-r--r-- | openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch b/openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch new file mode 100644 index 000000000..6e52e9c72 --- /dev/null +++ b/openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch @@ -0,0 +1,108 @@ +diff -urN linux.old/arch/mips/mm/tlbex-mips32.S linux.dev/arch/mips/mm/tlbex-mips32.S +--- linux.old/arch/mips/mm/tlbex-mips32.S 2005-05-28 17:42:03.000000000 +0200 ++++ linux.dev/arch/mips/mm/tlbex-mips32.S 2005-05-28 21:48:55.000000000 +0200 +@@ -90,6 +90,9 @@ + .set noat + LEAF(except_vec0_r4000) + .set mips3 ++#ifdef CONFIG_BCM4704 ++ nop ++#endif + #ifdef CONFIG_SMP + mfc0 k1, CP0_CONTEXT + la k0, pgd_current +diff -urN linux.old/arch/mips/mm/pg-r4k.c linux.dev/arch/mips/mm/pg-r4k.c +--- linux.old/arch/mips/mm/pg-r4k.c 2005-01-19 15:09:29.000000000 +0100 ++++ linux.dev/arch/mips/mm/pg-r4k.c 2005-05-28 21:57:52.000000000 +0200 +@@ -180,6 +180,7 @@ + + static inline void build_cdex_s(void) + { ++#if !defined(CONFIG_BCM4704) && !defined(CONFIG_BCM4710) + union mips_instruction mi; + + if ((store_offset & (cpu_scache_line_size() - 1))) +@@ -192,10 +193,12 @@ + mi.c_format.simmediate = store_offset; + + emit_instruction(mi); ++#endif + } + + static inline void build_cdex_p(void) + { ++#if !defined(CONFIG_BCM4704) && !defined(CONFIG_BCM4710) + union mips_instruction mi; + + if (store_offset & (cpu_dcache_line_size() - 1)) +@@ -218,6 +221,7 @@ + mi.c_format.simmediate = store_offset; + + emit_instruction(mi); ++#endif + } + + static void __build_store_reg(int reg) +diff -urN linux.old/include/asm-mips/stackframe.h linux.dev/include/asm-mips/stackframe.h +--- linux.old/include/asm-mips/stackframe.h 2002-11-29 00:53:15.000000000 +0100 ++++ linux.dev/include/asm-mips/stackframe.h 2005-05-28 21:53:03.000000000 +0200 +@@ -172,6 +172,46 @@ + rfe; \ + .set pop + ++#elif defined(CONFIG_BCM4710) || defined(CONFIG_BCM4704) ++ ++#define RESTORE_SOME \ ++ .set push; \ ++ .set reorder; \ ++ mfc0 t0, CP0_STATUS; \ ++ .set pop; \ ++ ori t0, 0x1f; \ ++ xori t0, 0x1f; \ ++ mtc0 t0, CP0_STATUS; \ ++ li v1, 0xff00; \ ++ and t0, v1; \ ++ lw v0, PT_STATUS(sp); \ ++ nor v1, $0, v1; \ ++ and v0, v1; \ ++ or v0, t0; \ ++ ori v1, v0, ST0_IE; \ ++ xori v1, v1, ST0_IE; \ ++ mtc0 v1, CP0_STATUS; \ ++ mtc0 v0, CP0_STATUS; \ ++ lw v1, PT_EPC(sp); \ ++ mtc0 v1, CP0_EPC; \ ++ lw $31, PT_R31(sp); \ ++ lw $28, PT_R28(sp); \ ++ lw $25, PT_R25(sp); \ ++ lw $7, PT_R7(sp); \ ++ lw $6, PT_R6(sp); \ ++ lw $5, PT_R5(sp); \ ++ lw $4, PT_R4(sp); \ ++ lw $3, PT_R3(sp); \ ++ lw $2, PT_R2(sp) ++ ++#define RESTORE_SP_AND_RET \ ++ lw sp, PT_R29(sp); \ ++ nop; \ ++ nop; \ ++ .set mips3; \ ++ eret; \ ++ .set mips0 ++ + #else + + #define RESTORE_SOME \ +diff -urN linux.old/arch/mips/mm/tlbex-r4k.S linux.dev/arch/mips/mm/tlbex-r4k.S +--- linux.old/arch/mips/mm/tlbex-r4k.S 2005-05-28 17:42:03.000000000 +0200 ++++ linux.dev/arch/mips/mm/tlbex-r4k.S 2005-05-29 15:04:43.000000000 +0200 +@@ -168,6 +168,9 @@ + .set noat + LEAF(except_vec0_r4000) + .set mips3 ++#ifdef CONFIG_BCM4704 ++ nop ++#endif + GET_PGD(k0, k1) # get pgd pointer + mfc0 k0, CP0_BADVADDR # Get faulting address + srl k0, k0, _PGDIR_SHIFT # get pgd only bits |