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-rw-r--r--target/linux/brcm-2.4/patches/003-bcm47xx_cache_fixes.patch498
1 files changed, 498 insertions, 0 deletions
diff --git a/target/linux/brcm-2.4/patches/003-bcm47xx_cache_fixes.patch b/target/linux/brcm-2.4/patches/003-bcm47xx_cache_fixes.patch
new file mode 100644
index 0000000000..e971e7fdfd
--- /dev/null
+++ b/target/linux/brcm-2.4/patches/003-bcm47xx_cache_fixes.patch
@@ -0,0 +1,498 @@
+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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