openwrtv3/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_workarounds.patch

122 lines
4.1 KiB
Diff

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
diff -urN linux.old/arch/mips/kernel/entry.S linux.dev/arch/mips/kernel/entry.S
--- linux.old/arch/mips/kernel/entry.S 2003-08-25 13:44:40.000000000 +0200
+++ linux.dev/arch/mips/kernel/entry.S 2005-06-01 20:10:36.000000000 +0200
@@ -100,6 +100,10 @@
* and R4400 SC and MC versions.
*/
NESTED(except_vec3_generic, 0, sp)
+#ifdef CONFIG_BCM4710
+ nop
+ nop
+#endif
#if R5432_CP0_INTERRUPT_WAR
mfc0 k0, CP0_INDEX
#endif