From 1ccd08f0e7b541f492aec896ef6fc9de3e11480e Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 6 Jul 2005 11:31:58 +0000
Subject: [PATCH] really fix v1 hardware bug now (there was a bug in
blast_dcache in the last fix)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1361 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../brcm/003-bcm47xx_cache_fixes.patch | 327 ++++++------------
1 file changed, 97 insertions(+), 230 deletions(-)
diff --git a/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_cache_fixes.patch b/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_cache_fixes.patch
index da40a4796..e971e7fdf 100644
--- a/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_cache_fixes.patch
+++ b/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_cache_fixes.patch
@@ -1,6 +1,6 @@
diff -urN linux.old/arch/mips/kernel/entry.S linux.dev/arch/mips/kernel/entry.S
--- linux.old/arch/mips/kernel/entry.S 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/arch/mips/kernel/entry.S 2005-07-05 16:42:36.000000000 +0200
++++ linux.dev/arch/mips/kernel/entry.S 2005-07-06 11:23:55.000000000 +0200
@@ -100,6 +100,10 @@
* and R4400 SC and MC versions.
*/
@@ -14,7 +14,7 @@ diff -urN linux.old/arch/mips/kernel/entry.S linux.dev/arch/mips/kernel/entry.S
#endif
diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
--- linux.old/arch/mips/mm/c-r4k.c 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/arch/mips/mm/c-r4k.c 2005-07-05 16:48:47.000000000 +0200
++++ linux.dev/arch/mips/mm/c-r4k.c 2005-07-06 11:23:55.000000000 +0200
@@ -14,6 +14,12 @@
#include <linux/mm.h>
#include <linux/bitops.h>
@@ -28,15 +28,16 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
#include <asm/bcache.h>
#include <asm/bootinfo.h>
#include <asm/cacheops.h>
-@@ -40,6 +46,7 @@
+@@ -40,6 +46,8 @@
.bc_inv = (void *)no_sc_noop
};
-+static int bcm4710 = 0;
++int bcm4710 = 0;
++EXPORT_SYMBOL(bcm4710);
struct bcache_ops *bcops = &no_sc_ops;
#define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x2010)
-@@ -64,8 +71,10 @@
+@@ -64,8 +72,10 @@
static inline void r4k_blast_dcache_page_setup(void)
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
@@ -49,7 +50,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
r4k_blast_dcache_page = blast_dcache16_page;
else if (dc_lsize == 32)
r4k_blast_dcache_page = r4k_blast_dcache_page_dc32;
-@@ -77,7 +86,9 @@
+@@ -77,7 +87,9 @@
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
@@ -60,7 +61,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
r4k_blast_dcache_page_indexed = blast_dcache16_page_indexed;
else if (dc_lsize == 32)
r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed;
-@@ -89,7 +100,9 @@
+@@ -89,7 +101,9 @@
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
@@ -71,7 +72,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
r4k_blast_dcache = blast_dcache16;
else if (dc_lsize == 32)
r4k_blast_dcache = blast_dcache32;
-@@ -266,6 +279,7 @@
+@@ -266,6 +280,7 @@
r4k_blast_dcache();
r4k_blast_icache();
@@ -79,7 +80,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
switch (current_cpu_data.cputype) {
case CPU_R4000SC:
case CPU_R4000MC:
-@@ -304,10 +318,10 @@
+@@ -304,10 +319,10 @@
* Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we
* only flush the primary caches but R10000 and R12000 behave sane ...
*/
@@ -92,7 +93,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
r4k_blast_scache();
}
-@@ -383,12 +397,15 @@
+@@ -383,12 +398,15 @@
unsigned long ic_lsize = current_cpu_data.icache.linesz;
unsigned long addr, aend;
@@ -110,7 +111,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
/* Hit_Writeback_Inv_D */
-@@ -403,8 +420,6 @@
+@@ -403,8 +421,6 @@
if (end - start > icache_size)
r4k_blast_icache();
else {
@@ -119,7 +120,17 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
/* Hit_Invalidate_I */
protected_flush_icache_line(addr);
-@@ -443,7 +458,8 @@
+@@ -413,6 +429,9 @@
+ addr += ic_lsize;
+ }
+ }
++
++ if (bcm4710)
++ flush_cache_all();
+ }
+
+ /*
+@@ -443,7 +462,8 @@
if (cpu_has_subset_pcaches) {
unsigned long addr = (unsigned long) page_address(page);
@@ -129,7 +140,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
ClearPageDcacheDirty(page);
return;
-@@ -451,6 +467,7 @@
+@@ -451,6 +471,7 @@
if (!cpu_has_ic_fills_f_dc) {
unsigned long addr = (unsigned long) page_address(page);
@@ -137,7 +148,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
r4k_blast_dcache_page(addr);
ClearPageDcacheDirty(page);
}
-@@ -477,7 +494,7 @@
+@@ -477,7 +498,7 @@
/* Catch bad driver code */
BUG_ON(size == 0);
@@ -146,7 +157,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
unsigned long sc_lsize = current_cpu_data.scache.linesz;
if (size >= scache_size) {
-@@ -509,6 +526,8 @@
+@@ -509,6 +530,8 @@
R4600_HIT_CACHEOP_WAR_IMPL;
a = addr & ~(dc_lsize - 1);
end = (addr + size - 1) & ~(dc_lsize - 1);
@@ -155,7 +166,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
flush_dcache_line(a); /* Hit_Writeback_Inv_D */
if (a == end)
-@@ -527,7 +546,7 @@
+@@ -527,7 +550,7 @@
/* Catch bad driver code */
BUG_ON(size == 0);
@@ -164,7 +175,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
unsigned long sc_lsize = current_cpu_data.scache.linesz;
if (size >= scache_size) {
-@@ -554,6 +573,8 @@
+@@ -554,6 +577,8 @@
R4600_HIT_CACHEOP_WAR_IMPL;
a = addr & ~(dc_lsize - 1);
end = (addr + size - 1) & ~(dc_lsize - 1);
@@ -173,7 +184,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
while (1) {
flush_dcache_line(a); /* Hit_Writeback_Inv_D */
if (a == end)
-@@ -577,6 +598,8 @@
+@@ -577,6 +602,8 @@
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
R4600_HIT_CACHEOP_WAR_IMPL;
@@ -182,7 +193,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
protected_flush_icache_line(addr & ~(ic_lsize - 1));
if (MIPS4K_ICACHE_REFILL_WAR) {
-@@ -986,10 +1009,12 @@
+@@ -986,10 +1013,12 @@
case CPU_R4000MC:
case CPU_R4400SC:
case CPU_R4400MC:
@@ -199,7 +210,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
break;
case CPU_R10000:
-@@ -1041,6 +1066,19 @@
+@@ -1041,6 +1070,19 @@
static inline void coherency_setup(void)
{
change_c0_config(CONF_CM_CMASK, CONF_CM_DEFAULT);
@@ -219,50 +230,7 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
/*
* c0_status.cu=0 specifies that updates by the sc instruction use
-@@ -1062,6 +1100,42 @@
-
- }
-
-+#ifdef CONFIG_BCM4704
-+static void __init mips32_icache_fill(unsigned long addr, uint nbytes)
-+{
-+ unsigned long ic_lsize = current_cpu_data.icache.linesz;
-+ int i;
-+ for (i = 0; i < nbytes; i += ic_lsize)
-+ fill_icache_line((addr + i));
-+}
-+
-+/*
-+ * This must be run from the cache on 4704A0
-+ * so there are no mips core BIU ops in progress
-+ * when the PFC is enabled.
-+ */
-+#define PFC_CR0 0xff400000 /* control reg 0 */
-+#define PFC_CR1 0xff400004 /* control reg 1 */
-+static void __init enable_pfc(u32 mode)
-+{
-+ /* write range */
-+ *(volatile u32 *)PFC_CR1 = 0xffff0000;
-+
-+ /* enable */
-+ *(volatile u32 *)PFC_CR0 = mode;
-+}
-+
-+void check_enable_mips_pfc(int val)
-+{
-+ /* enable prefetch cache */
-+ if (BCM330X(current_cpu_data.processor_id)
-+ && (read_c0_diag() & (1 << 29))) {
-+ mips32_icache_fill((unsigned long) &enable_pfc, 64);
-+ enable_pfc(val);
-+ }
-+}
-+#endif
-+
- void __init ld_mmu_r4xx0(void)
- {
- extern void build_clear_page(void);
-@@ -1073,6 +1147,12 @@
+@@ -1073,6 +1115,12 @@
memcpy((void *)(KSEG0 + 0x100), &except_vec2_generic, 0x80);
memcpy((void *)(KSEG1 + 0x100), &except_vec2_generic, 0x80);
@@ -275,118 +243,9 @@ diff -urN linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
probe_pcache();
setup_scache();
-@@ -1117,47 +1197,9 @@
-
- build_clear_page();
- build_copy_page();
--}
--
--#ifdef CONFIG_BCM4704
--static void __init mips32_icache_fill(unsigned long addr, uint nbytes)
--{
-- unsigned long ic_lsize = current_cpu_data.icache.linesz;
-- int i;
-- for (i = 0; i < nbytes; i += ic_lsize)
-- fill_icache_line((addr + i));
--}
--
--/*
-- * This must be run from the cache on 4704A0
-- * so there are no mips core BIU ops in progress
-- * when the PFC is enabled.
-- */
--#define PFC_CR0 0xff400000 /* control reg 0 */
--#define PFC_CR1 0xff400004 /* control reg 1 */
--static void __init enable_pfc(u32 mode)
--{
-- /* write range */
-- *(volatile u32 *)PFC_CR1 = 0xffff0000;
--
-- /* enable */
-- *(volatile u32 *)PFC_CR0 = mode;
--}
--#endif
--
--
--void check_enable_mips_pfc(int val)
--{
--
-+
- #ifdef CONFIG_BCM4704
-- struct cpuinfo_mips *c = ¤t_cpu_data;
--
-- /* enable prefetch cache */
-- if (((c->processor_id & (PRID_COMP_MASK | PRID_IMP_MASK)) == PRID_IMP_BCM3302)
-- && (read_c0_diag() & (1 << 29))) {
-- mips32_icache_fill((unsigned long) &enable_pfc, 64);
-- enable_pfc(val);
-- }
-+ check_enable_mips_pfc(0x15);
- #endif
- }
-
-diff -urN linux.old/arch/mips/mm/tlb-r4k.c linux.dev/arch/mips/mm/tlb-r4k.c
---- linux.old/arch/mips/mm/tlb-r4k.c 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/arch/mips/mm/tlb-r4k.c 2005-07-05 16:42:36.000000000 +0200
-@@ -38,6 +38,7 @@
- old_ctx = read_c0_entryhi();
- write_c0_entrylo0(0);
- write_c0_entrylo1(0);
-+ BARRIER;
-
- entry = read_c0_wired();
-
-@@ -47,6 +48,7 @@
- write_c0_index(entry);
- mtc0_tlbw_hazard();
- tlb_write_indexed();
-+ BARRIER;
- entry++;
- }
- tlbw_use_hazard();
-@@ -98,6 +100,7 @@
- write_c0_entryhi(KSEG0 + idx*0x2000);
- mtc0_tlbw_hazard();
- tlb_write_indexed();
-+ BARRIER;
- }
- tlbw_use_hazard();
- write_c0_entryhi(oldpid);
-@@ -136,6 +139,7 @@
- tlbw_use_hazard();
-
- finish:
-+ BARRIER;
- write_c0_entryhi(oldpid);
- local_irq_restore(flags);
- }
-@@ -204,6 +208,7 @@
- pmdp = pmd_offset(pgdp, address);
- idx = read_c0_index();
- ptep = pte_offset(pmdp, address);
-+ BARRIER;
- #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
- write_c0_entrylo0(ptep->pte_high);
- ptep++;
-@@ -220,6 +225,7 @@
- tlb_write_indexed();
- tlbw_use_hazard();
- write_c0_entryhi(pid);
-+ BARRIER;
- local_irq_restore(flags);
- }
-
-@@ -317,6 +323,7 @@
- }
-
- write_c0_index(temp_tlb_entry);
-+ BARRIER;
- write_c0_pagemask(pagemask);
- write_c0_entryhi(entryhi);
- write_c0_entrylo0(entrylo0);
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 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/arch/mips/mm/tlbex-mips32.S 2005-07-05 16:42:36.000000000 +0200
++++ linux.dev/arch/mips/mm/tlbex-mips32.S 2005-07-06 11:23:56.000000000 +0200
@@ -90,6 +90,9 @@
.set noat
LEAF(except_vec0_r4000)
@@ -399,7 +258,7 @@ diff -urN linux.old/arch/mips/mm/tlbex-mips32.S linux.dev/arch/mips/mm/tlbex-mip
la k0, pgd_current
diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
--- linux.old/include/asm-mips/r4kcache.h 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/include/asm-mips/r4kcache.h 2005-07-05 16:42:36.000000000 +0200
++++ linux.dev/include/asm-mips/r4kcache.h 2005-07-06 12:52:57.000000000 +0200
@@ -15,6 +15,18 @@
#include <asm/asm.h>
#include <asm/cacheops.h>
@@ -419,15 +278,35 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
#define cache_op(op,addr) \
__asm__ __volatile__( \
" .set noreorder \n" \
-@@ -32,6 +44,7 @@
+@@ -27,12 +39,25 @@
+
+ static inline void flush_icache_line_indexed(unsigned long addr)
+ {
+- cache_op(Index_Invalidate_I, addr);
++ unsigned int way;
++ unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
++
++ for (way = 0; way < current_cpu_data.dcache.ways; way++) {
++ cache_op(Index_Invalidate_I, addr);
++ addr += ws_inc;
++ }
+ }
static inline void flush_dcache_line_indexed(unsigned long addr)
{
-+ BCM4710_DUMMY_RREG();
- cache_op(Index_Writeback_Inv_D, addr);
+- cache_op(Index_Writeback_Inv_D, addr);
++ unsigned int way;
++ unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
++
++ for (way = 0; way < current_cpu_data.dcache.ways; way++) {
++ BCM4710_DUMMY_RREG();
++ cache_op(Index_Writeback_Inv_D, addr);
++ addr += ws_inc;
++ }
}
-@@ -47,6 +60,7 @@
+ static inline void flush_scache_line_indexed(unsigned long addr)
+@@ -47,6 +72,7 @@
static inline void flush_dcache_line(unsigned long addr)
{
@@ -435,7 +314,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
cache_op(Hit_Writeback_Inv_D, addr);
}
-@@ -91,6 +105,7 @@
+@@ -91,6 +117,7 @@
*/
static inline void protected_writeback_dcache_line(unsigned long addr)
{
@@ -443,7 +322,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
__asm__ __volatile__(
".set noreorder\n\t"
".set mips3\n"
-@@ -138,6 +153,59 @@
+@@ -138,6 +165,62 @@
: "r" (base), \
"i" (op));
@@ -462,7 +341,8 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
+static inline void blast_dcache(void)
+{
+ unsigned long start = KSEG0;
-+ unsigned long end = start + current_cpu_data.dcache.waysize;
++ unsigned long dcache_size = current_cpu_data.dcache.waysize * current_cpu_data.dcache.ways;
++ unsigned long end = (start + dcache_size);
+
+ while(start < end) {
+ BCM4710_DUMMY_RREG();
@@ -493,17 +373,19 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
+ current_cpu_data.dcache.waybit;
+ unsigned long ws, addr;
+
-+ for (ws = 0; ws < ws_end; ws += ws_inc)
-+ for (addr = start; addr < end; addr += start += current_cpu_data.dcache.linesz) {
++ for (ws = 0; ws < ws_end; ws += ws_inc) {
++ start = page + ws;
++ for (addr = start; addr < end; addr += current_cpu_data.dcache.linesz) {
+ BCM4710_DUMMY_RREG();
+ cache_unroll(addr,Index_Writeback_Inv_D);
+ }
++ }
+}
+
static inline void blast_dcache16(void)
{
unsigned long start = KSEG0;
-@@ -148,8 +216,9 @@
+@@ -148,8 +231,9 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
@@ -514,7 +396,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
}
static inline void blast_dcache16_page(unsigned long page)
-@@ -173,8 +242,9 @@
+@@ -173,8 +257,9 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
@@ -525,7 +407,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
}
static inline void blast_icache16(void)
-@@ -196,6 +266,7 @@
+@@ -196,6 +281,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
@@ -533,7 +415,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
do {
cache16_unroll32(start,Hit_Invalidate_I);
start += 0x200;
-@@ -281,6 +352,7 @@
+@@ -281,6 +367,7 @@
: "r" (base), \
"i" (op));
@@ -541,7 +423,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
static inline void blast_dcache32(void)
{
unsigned long start = KSEG0;
-@@ -291,8 +363,9 @@
+@@ -291,8 +378,9 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
@@ -552,7 +434,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
}
static inline void blast_dcache32_page(unsigned long page)
-@@ -316,8 +389,9 @@
+@@ -316,8 +404,9 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
@@ -563,7 +445,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
}
static inline void blast_icache32(void)
-@@ -339,6 +413,7 @@
+@@ -339,6 +428,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
@@ -571,7 +453,7 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
do {
cache32_unroll32(start,Hit_Invalidate_I);
start += 0x400;
-@@ -443,6 +518,7 @@
+@@ -443,6 +533,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
@@ -581,51 +463,36 @@ diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kca
start += 0x800;
diff -urN linux.old/include/asm-mips/stackframe.h linux.dev/include/asm-mips/stackframe.h
--- linux.old/include/asm-mips/stackframe.h 2005-07-05 16:46:49.000000000 +0200
-+++ linux.dev/include/asm-mips/stackframe.h 2005-07-05 16:42:36.000000000 +0200
-@@ -172,6 +172,46 @@
- rfe; \
- .set pop
++++ linux.dev/include/asm-mips/stackframe.h 2005-07-06 11:23:56.000000000 +0200
+@@ -209,6 +209,20 @@
-+#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)
+ #endif
+
++#if defined(CONFIG_BCM4710) || defined(CONFIG_BCM4704)
+
++#undef RESTORE_SP_AND_RET
+#define RESTORE_SP_AND_RET \
+ lw sp, PT_R29(sp); \
++ .set mips3; \
+ nop; \
+ nop; \
-+ .set mips3; \
+ eret; \
+ .set mips0
+
- #else
++#endif
++
++
+ #define RESTORE_SP \
+ lw sp, PT_R29(sp); \
+
+diff -urN linux.old/mm/memory.c linux.dev/mm/memory.c
+--- linux.old/mm/memory.c 2005-04-04 03:42:20.000000000 +0200
++++ linux.dev/mm/memory.c 2005-07-06 11:23:56.000000000 +0200
+@@ -925,6 +925,7 @@
+ flush_page_to_ram(new_page);
+ flush_cache_page(vma, address);
+ establish_pte(vma, address, page_table, pte_mkwrite(pte_mkdirty(mk_pte(new_page, vma->vm_page_prot))));
++ flush_icache_page(vma, new_page);
+ }
- #define RESTORE_SOME \
+ /*
--
2.20.1