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openwrt/target/linux/brcm-2.4/patches/003-bcm47xx_cache_fixes.patch

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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 2005-07-05 16:46:49.000000000 +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.
*/
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 2005-07-05 16:46:49.000000000 +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>
+#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 +46,8 @@
.bc_inv = (void *)no_sc_noop
};
+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 +72,10 @@
static inline void r4k_blast_dcache_page_setup(void)
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
-
- if (dc_lsize == 16)
+
+ if (bcm4710)
+ r4k_blast_dcache_page = blast_dcache_page;
+ else if (dc_lsize == 16)
r4k_blast_dcache_page = blast_dcache16_page;
else if (dc_lsize == 32)
r4k_blast_dcache_page = r4k_blast_dcache_page_dc32;
@@ -77,7 +87,9 @@
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
- if (dc_lsize == 16)
+ if (bcm4710)
+ r4k_blast_dcache_page_indexed = blast_dcache_page_indexed;
+ else if (dc_lsize == 16)
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 +101,9 @@
{
unsigned long dc_lsize = current_cpu_data.dcache.linesz;
- if (dc_lsize == 16)
+ if (bcm4710)
+ r4k_blast_dcache = blast_dcache;
+ else if (dc_lsize == 16)
r4k_blast_dcache = blast_dcache16;
else if (dc_lsize == 32)
r4k_blast_dcache = blast_dcache32;
@@ -266,6 +280,7 @@
r4k_blast_dcache();
r4k_blast_icache();
+ if (!bcm4710)
switch (current_cpu_data.cputype) {
case CPU_R4000SC:
case CPU_R4000MC:
@@ -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 ...
*/
- 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 +398,15 @@
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 +421,6 @@
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);
@@ -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);
- r4k_blast_scache_page(addr);
+ if (!bcm4710)
+ r4k_blast_scache_page(addr);
ClearPageDcacheDirty(page);
return;
@@ -451,6 +471,7 @@
if (!cpu_has_ic_fills_f_dc) {
unsigned long addr = (unsigned long) page_address(page);
+
r4k_blast_dcache_page(addr);
ClearPageDcacheDirty(page);
}
@@ -477,7 +498,7 @@
/* 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 +530,8 @@
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 +550,7 @@
/* 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 +577,8 @@
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 +602,8 @@
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 +1013,12 @@
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 +1070,19 @@
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
@@ -1073,6 +1115,12 @@
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) {
+ printk("Enabling BCM4710A0 cache workarounds.\n");
+ bcm4710 = 1;
+ } else
+ bcm4710 = 0;
+
probe_pcache();
setup_scache();
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 2005-07-06 11:23:56.000000000 +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 2005-07-05 16:46:49.000000000 +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>
+#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" \
@@ -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)
{
- 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;
+ }
}
static inline void flush_scache_line_indexed(unsigned long addr)
@@ -47,6 +72,7 @@
static inline void flush_dcache_line(unsigned long addr)
{
+ BCM4710_DUMMY_RREG();
cache_op(Hit_Writeback_Inv_D, addr);
}
@@ -91,6 +117,7 @@
*/
static inline void protected_writeback_dcache_line(unsigned long addr)
{
+ BCM4710_DUMMY_RREG();
__asm__ __volatile__(
".set noreorder\n\t"
".set mips3\n"
@@ -138,6 +165,62 @@
: "r" (base), \
"i" (op));
+#define cache_unroll(base,op) \
+ __asm__ __volatile__(" \
+ .set noreorder; \
+ .set mips3; \
+ cache %1, (%0); \
+ .set mips0; \
+ .set reorder" \
+ : \
+ : "r" (base), \
+ "i" (op));
+
+
+static inline void blast_dcache(void)
+{
+ unsigned long start = KSEG0;
+ 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();
+ cache_unroll(start,Index_Writeback_Inv_D);
+ start += current_cpu_data.dcache.linesz;
+ }
+}
+
+static inline void blast_dcache_page(unsigned long page)
+{
+ unsigned long start = page;
+ unsigned long end = start + PAGE_SIZE;
+
+ BCM4710_FILL_TLB(start);
+ do {
+ BCM4710_DUMMY_RREG();
+ cache_unroll(start,Hit_Writeback_Inv_D);
+ start += current_cpu_data.dcache.linesz;
+ } while (start < end);
+}
+
+static inline void blast_dcache_page_indexed(unsigned long page)
+{
+ unsigned long start = page;
+ unsigned long end = start + PAGE_SIZE;
+ unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
+ unsigned long ws_end = current_cpu_data.dcache.ways <<
+ current_cpu_data.dcache.waybit;
+ unsigned long ws, addr;
+
+ 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 +231,9 @@
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) {
cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_dcache16_page(unsigned long page)
@@ -173,8 +257,9 @@
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) {
cache16_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_icache16(void)
@@ -196,6 +281,7 @@
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 +367,7 @@
: "r" (base), \
"i" (op));
+
static inline void blast_dcache32(void)
{
unsigned long start = KSEG0;
@@ -291,8 +378,9 @@
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) {
cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_dcache32_page(unsigned long page)
@@ -316,8 +404,9 @@
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) {
cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+ }
}
static inline void blast_icache32(void)
@@ -339,6 +428,7 @@
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 +533,7 @@
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 2005-07-05 16:46:49.000000000 +0200
+++ linux.dev/include/asm-mips/stackframe.h 2005-07-06 11:23:56.000000000 +0200
@@ -209,6 +209,20 @@
#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; \
+ eret; \
+ .set mips0
+
+#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);
}
/*
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