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openwrt-xburst/openwrt/target/linux/linux-2.4/patches/brcm/003-bcm47xx_cache_fixes.patch
nbd b0fa7eb5fd clean up mmu/cache patch for bcm4710 - improves stability a lot 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1297 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-06-30 21:17:39 +00:00

560 lines
15 KiB
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diff -urN linux.old/arch/mips/kernel/entry.S linux.dev/arch/mips/kernel/entry.S
--- linux.old/arch/mips/kernel/entry.S 2005-06-26 16:27:01.000000000 +0200
+++ linux.dev/arch/mips/kernel/entry.S 2005-06-29 20:24:54.000000000 +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
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 2005-06-26 16:27:01.000000000 +0200
+++ linux.dev/arch/mips/mm/c-r4k.c 2005-06-30 22:24:29.000000000 +0200
@@ -14,6 +14,12 @@
#include <linux/mm.h>
#include <linux/bitops.h>
+#ifdef CONFIG_BCM4710
+#include "../bcm947xx/include/typedefs.h"
+#include "../bcm947xx/include/sbconfig.h"
+#include <asm/paccess.h>
+#endif
+
#include <asm/bcache.h>
#include <asm/bootinfo.h>
#include <asm/cacheops.h>
@@ -40,6 +46,7 @@
.bc_inv = (void *)no_sc_noop
};
+static int bcm4710 = 0;
struct bcache_ops *bcops = &no_sc_ops;
#define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x2010)
@@ -266,6 +273,7 @@
r4k_blast_dcache();
r4k_blast_icache();
+ if (!bcm4710)
switch (current_cpu_data.cputype) {
case CPU_R4000SC:
case CPU_R4000MC:
@@ -304,10 +312,10 @@
* Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we
* only flush the primary caches but R10000 and R12000 behave sane ...
*/
- if (current_cpu_data.cputype == CPU_R4000SC ||
+ if (!bcm4710 && (current_cpu_data.cputype == CPU_R4000SC ||
current_cpu_data.cputype == CPU_R4000MC ||
current_cpu_data.cputype == CPU_R4400SC ||
- current_cpu_data.cputype == CPU_R4400MC)
+ current_cpu_data.cputype == CPU_R4400MC))
r4k_blast_scache();
}
@@ -383,12 +391,15 @@
unsigned long ic_lsize = current_cpu_data.icache.linesz;
unsigned long addr, aend;
+ addr = start & ~(dc_lsize - 1);
+ aend = (end - 1) & ~(dc_lsize - 1);
+
if (!cpu_has_ic_fills_f_dc) {
if (end - start > dcache_size)
r4k_blast_dcache();
else {
- addr = start & ~(dc_lsize - 1);
- aend = (end - 1) & ~(dc_lsize - 1);
+ BCM4710_PROTECTED_FILL_TLB(addr);
+ BCM4710_PROTECTED_FILL_TLB(aend);
while (1) {
/* Hit_Writeback_Inv_D */
@@ -403,8 +414,6 @@
if (end - start > icache_size)
r4k_blast_icache();
else {
- addr = start & ~(ic_lsize - 1);
- aend = (end - 1) & ~(ic_lsize - 1);
while (1) {
/* Hit_Invalidate_I */
protected_flush_icache_line(addr);
@@ -443,7 +452,8 @@
if (cpu_has_subset_pcaches) {
unsigned long addr = (unsigned long) page_address(page);
- r4k_blast_scache_page(addr);
+ if (!bcm4710)
+ r4k_blast_scache_page(addr);
ClearPageDcacheDirty(page);
return;
@@ -451,6 +461,7 @@
if (!cpu_has_ic_fills_f_dc) {
unsigned long addr = (unsigned long) page_address(page);
+
r4k_blast_dcache_page(addr);
ClearPageDcacheDirty(page);
}
@@ -477,7 +488,7 @@
/* Catch bad driver code */
BUG_ON(size == 0);
- if (cpu_has_subset_pcaches) {
+ if (!bcm4710 && cpu_has_subset_pcaches) {
unsigned long sc_lsize = current_cpu_data.scache.linesz;
if (size >= scache_size) {
@@ -509,6 +520,8 @@
R4600_HIT_CACHEOP_WAR_IMPL;
a = addr & ~(dc_lsize - 1);
end = (addr + size - 1) & ~(dc_lsize - 1);
+ BCM4710_FILL_TLB(a);
+ BCM4710_FILL_TLB(end);
while (1) {
flush_dcache_line(a); /* Hit_Writeback_Inv_D */
if (a == end)
@@ -527,7 +540,7 @@
/* Catch bad driver code */
BUG_ON(size == 0);
- if (cpu_has_subset_pcaches) {
+ if (!bcm4710 && (cpu_has_subset_pcaches)) {
unsigned long sc_lsize = current_cpu_data.scache.linesz;
if (size >= scache_size) {
@@ -554,6 +567,8 @@
R4600_HIT_CACHEOP_WAR_IMPL;
a = addr & ~(dc_lsize - 1);
end = (addr + size - 1) & ~(dc_lsize - 1);
+ BCM4710_FILL_TLB(a);
+ BCM4710_FILL_TLB(end);
while (1) {
flush_dcache_line(a); /* Hit_Writeback_Inv_D */
if (a == end)
@@ -577,6 +592,8 @@
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
R4600_HIT_CACHEOP_WAR_IMPL;
+ BCM4710_PROTECTED_FILL_TLB(addr);
+ BCM4710_PROTECTED_FILL_TLB(addr + 4);
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
protected_flush_icache_line(addr & ~(ic_lsize - 1));
if (MIPS4K_ICACHE_REFILL_WAR) {
@@ -986,10 +1003,12 @@
case CPU_R4000MC:
case CPU_R4400SC:
case CPU_R4400MC:
- probe_scache_kseg1 = (probe_func_t) (KSEG1ADDR(&probe_scache));
- sc_present = probe_scache_kseg1(config);
- if (sc_present)
- c->options |= MIPS_CPU_CACHE_CDEX_S;
+ if (!bcm4710) {
+ probe_scache_kseg1 = (probe_func_t) (KSEG1ADDR(&probe_scache));
+ sc_present = probe_scache_kseg1(config);
+ if (sc_present)
+ c->options |= MIPS_CPU_CACHE_CDEX_S;
+ }
break;
case CPU_R10000:
@@ -1041,6 +1060,19 @@
static inline void coherency_setup(void)
{
change_c0_config(CONF_CM_CMASK, CONF_CM_DEFAULT);
+
+#if defined(CONFIG_BCM4310) || defined(CONFIG_BCM4704) || defined(CONFIG_BCM5365)
+ if (BCM330X(current_cpu_data.processor_id)) {
+ uint32 cm;
+
+ cm = read_c0_diag();
+ /* Enable icache */
+ cm |= (1 << 31);
+ /* Enable dcache */
+ cm |= (1 << 30);
+ write_c0_diag(cm);
+ }
+#endif
/*
* c0_status.cu=0 specifies that updates by the sc instruction use
@@ -1062,6 +1094,42 @@
}
+#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 +1141,11 @@
memcpy((void *)(KSEG0 + 0x100), &except_vec2_generic, 0x80);
memcpy((void *)(KSEG1 + 0x100), &except_vec2_generic, 0x80);
+ if (current_cpu_data.cputype == CPU_BCM4710 && (current_cpu_data.processor_id & PRID_REV_MASK) == 0)
+ bcm4710 = 1;
+ else
+ bcm4710 = 0;
+
probe_pcache();
setup_scache();
@@ -1117,47 +1190,9 @@
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 = &current_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 2005-06-26 16:24:26.000000000 +0200
+++ linux.dev/arch/mips/mm/tlb-r4k.c 2005-06-29 20:29:16.000000000 +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 2005-06-26 16:27:01.000000000 +0200
+++ linux.dev/arch/mips/mm/tlbex-mips32.S 2005-06-29 20:24:54.000000000 +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/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
--- linux.old/include/asm-mips/r4kcache.h 2005-06-26 16:27:01.000000000 +0200
+++ linux.dev/include/asm-mips/r4kcache.h 2005-06-30 22:39:42.000000000 +0200
@@ -15,6 +15,18 @@
#include <asm/asm.h>
#include <asm/cacheops.h>
+#ifdef CONFIG_BCM4710
+#define BCM4710_DUMMY_RREG() (((sbconfig_t *)(KSEG1ADDR(SB_ENUM_BASE + SBCONFIGOFF)))->sbimstate)
+
+#define BCM4710_FILL_TLB(addr) (*(volatile unsigned long *)(addr))
+#define BCM4710_PROTECTED_FILL_TLB(addr) ({ unsigned long x; get_dbe(x, (volatile unsigned long *)(addr)); })
+#else
+#define BCM4710_DUMMY_RREG()
+
+#define BCM4710_FILL_TLB(addr)
+#define BCM4710_PROTECTED_FILL_TLB(addr)
+#endif
+
#define cache_op(op,addr) \
__asm__ __volatile__( \
" .set noreorder \n" \
@@ -32,6 +44,7 @@
static inline void flush_dcache_line_indexed(unsigned long addr)
{
+ BCM4710_DUMMY_RREG();
cache_op(Index_Writeback_Inv_D, addr);
}
@@ -47,6 +60,7 @@
static inline void flush_dcache_line(unsigned long addr)
{
+ BCM4710_DUMMY_RREG();
cache_op(Hit_Writeback_Inv_D, addr);
}
@@ -91,6 +105,7 @@
*/
static inline void protected_writeback_dcache_line(unsigned long addr)
{
+ BCM4710_DUMMY_RREG();
__asm__ __volatile__(
".set noreorder\n\t"
".set mips3\n"
@@ -148,8 +163,10 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
- for (addr = start; addr < end; addr += 0x200)
+ for (addr = start; addr < end; addr += 0x200) {
+ BCM4710_DUMMY_RREG();
cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_dcache16_page(unsigned long page)
@@ -157,7 +174,9 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
+ BCM4710_FILL_TLB(start);
do {
+ BCM4710_DUMMY_RREG();
cache16_unroll32(start,Hit_Writeback_Inv_D);
start += 0x200;
} while (start < end);
@@ -173,8 +192,10 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
- for (addr = start; addr < end; addr += 0x200)
+ for (addr = start; addr < end; addr += 0x200) {
+ BCM4710_DUMMY_RREG();
cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_icache16(void)
@@ -196,6 +217,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
+ BCM4710_FILL_TLB(start);
do {
cache16_unroll32(start,Hit_Invalidate_I);
start += 0x200;
@@ -281,6 +303,7 @@
: "r" (base), \
"i" (op));
+
static inline void blast_dcache32(void)
{
unsigned long start = KSEG0;
@@ -291,8 +314,10 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
- for (addr = start; addr < end; addr += 0x400)
+ for (addr = start; addr < end; addr += 0x400) {
+ BCM4710_DUMMY_RREG();
cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_dcache32_page(unsigned long page)
@@ -300,7 +325,9 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
+ BCM4710_FILL_TLB(start);
do {
+ BCM4710_DUMMY_RREG();
cache32_unroll32(start,Hit_Writeback_Inv_D);
start += 0x400;
} while (start < end);
@@ -316,8 +343,10 @@
unsigned long ws, addr;
for (ws = 0; ws < ws_end; ws += ws_inc)
- for (addr = start; addr < end; addr += 0x400)
+ for (addr = start; addr < end; addr += 0x400) {
+ BCM4710_DUMMY_RREG();
cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_icache32(void)
@@ -339,6 +368,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
+ BCM4710_FILL_TLB(start);
do {
cache32_unroll32(start,Hit_Invalidate_I);
start += 0x400;
@@ -443,6 +473,7 @@
unsigned long start = page;
unsigned long end = start + PAGE_SIZE;
+ BCM4710_FILL_TLB(start);
do {
cache64_unroll32(start,Hit_Invalidate_I);
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 2005-06-26 16:27:01.000000000 +0200
+++ linux.dev/include/asm-mips/stackframe.h 2005-06-30 19:04:46.000000000 +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 \
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