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-rw-r--r--target/linux/linux-2.6/patches/brcm/003-bcm4710_cache_fixes.patch316
1 files changed, 316 insertions, 0 deletions
diff --git a/target/linux/linux-2.6/patches/brcm/003-bcm4710_cache_fixes.patch b/target/linux/linux-2.6/patches/brcm/003-bcm4710_cache_fixes.patch
new file mode 100644
index 000000000..76e90584d
--- /dev/null
+++ b/target/linux/linux-2.6/patches/brcm/003-bcm4710_cache_fixes.patch
@@ -0,0 +1,316 @@
+diff -urN linux.old/arch/mips/kernel/genex.S linux.dev/arch/mips/kernel/genex.S
+--- linux.old/arch/mips/kernel/genex.S 2005-12-04 06:10:42.000000000 +0100
++++ linux.dev/arch/mips/kernel/genex.S 2005-12-18 05:30:48.564937750 +0100
+@@ -72,6 +72,10 @@
+ .set push
+ .set mips3
+ .set noat
++#ifdef CONFIG_BCM4710
++ nop
++ nop
++#endif
+ mfc0 k1, CP0_CAUSE
+ li k0, 31<<2
+ andi k1, k1, 0x7c
+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 2005-12-04 06:10:42.000000000 +0100
++++ linux.dev/arch/mips/mm/c-r4k.c 2005-12-18 06:08:19.112437750 +0100
+@@ -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/cache.h>
+@@ -29,6 +35,9 @@
+ #include <asm/war.h>
+ #include <asm/cacheflush.h> /* for run_uncached() */
+
++/* For enabling BCM4710 cache workarounds */
++int bcm4710 = 0;
++
+ /*
+ * Must die.
+ */
+@@ -73,7 +82,9 @@
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
+- 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;
+@@ -85,7 +96,9 @@
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
+- 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;
+@@ -97,7 +110,9 @@
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
+- 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;
+@@ -486,6 +501,9 @@
+ 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 */
+ protected_writeback_dcache_line(addr);
+@@ -657,6 +675,10 @@
+ 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)
+@@ -702,6 +724,10 @@
+ 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)
+@@ -727,6 +753,8 @@
+ unsigned long addr = (unsigned long) arg;
+
+ R4600_HIT_CACHEOP_WAR_IMPL;
++ BCM4710_PROTECTED_FILL_TLB(addr);
++ BCM4710_PROTECTED_FILL_TLB(addr + 4);
+ protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
+ if (!cpu_icache_snoops_remote_store)
+ protected_writeback_scache_line(addr & ~(sc_lsize - 1));
+@@ -1202,6 +1230,16 @@
+ 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)) {
++ __u32 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
+@@ -1231,6 +1269,15 @@
+
+ /* Default cache error handler for R4000 and R5000 family */
+ set_uncached_handler (0x100, &except_vec2_generic, 0x80);
++
++ /* Check if special workarounds are required */
++#ifdef CONFIG_BCM4710
++ if (current_cpu_data.cputype == CPU_BCM4710 && (current_cpu_data.processor_id & 0xff) == 0) {
++ printk("Enabling BCM4710A0 cache workarounds.\n");
++ bcm4710 = 1;
++ } else
++#endif
++ bcm4710 = 0;
+
+ probe_pcache();
+ setup_scache();
+diff -urN linux.old/arch/mips/mm/tlbex.c linux.dev/arch/mips/mm/tlbex.c
+--- linux.old/arch/mips/mm/tlbex.c 2005-12-15 12:57:27.945158000 +0100
++++ linux.dev/arch/mips/mm/tlbex.c 2005-12-18 06:06:17.916863500 +0100
+@@ -28,6 +28,10 @@
+
+ /* #define DEBUG_TLB */
+
++#ifdef CONFIG_BCM4710
++extern int bcm4710;
++#endif
++
+ static __init int __attribute__((unused)) r45k_bvahwbug(void)
+ {
+ /* XXX: We should probe for the presence of this bug, but we don't. */
+@@ -1152,6 +1156,12 @@
+ memset(relocs, 0, sizeof(relocs));
+ memset(final_handler, 0, sizeof(final_handler));
+
++#ifdef CONFIG_BCM4710
++ if (bcm4710) {
++ i_nop(&p);
++ }
++#endif
++
+ /*
+ * create the plain linear handler
+ */
+diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
+--- linux.old/include/asm-mips/r4kcache.h 2005-12-17 22:39:19.281320000 +0100
++++ linux.dev/include/asm-mips/r4kcache.h 2005-12-18 05:22:06.020280750 +0100
+@@ -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
++
+ /*
+ * This macro return a properly sign-extended address suitable as base address
+ * for indexed cache operations. Two issues here:
+@@ -45,6 +57,7 @@
+
+ static inline void flush_dcache_line_indexed(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ cache_op(Index_Writeback_Inv_D, addr);
+ }
+
+@@ -60,11 +73,13 @@
+
+ static inline void flush_dcache_line(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ cache_op(Hit_Writeback_Inv_D, addr);
+ }
+
+ static inline void invalidate_dcache_line(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ cache_op(Hit_Invalidate_D, addr);
+ }
+
+@@ -104,6 +119,7 @@
+ */
+ static inline void protected_writeback_dcache_line(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set noreorder \n"
+@@ -166,6 +182,49 @@
+ : "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);
++
++ do {
++ BCM4710_DUMMY_RREG();
++ cache_op(Index_Writeback_Inv_D, start);
++ start += current_cpu_data.dcache.linesz;
++ } while(start < end);
++}
++
++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_op(Hit_Writeback_Inv_D, start);
++ 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_op(Index_Writeback_Inv_D, addr);
++ }
++ }
++}
++
+ static inline void blast_dcache16(void)
+ {
+ unsigned long start = INDEX_BASE;
+@@ -213,7 +272,8 @@
+ unsigned long ws_end = current_cpu_data.icache.ways <<
+ current_cpu_data.icache.waybit;
+ unsigned long ws, addr;
+-
++
++ BCM4710_FILL_TLB(start);
+ for (ws = 0; ws < ws_end; ws += ws_inc)
+ for (addr = start; addr < end; addr += 0x200)
+ cache16_unroll32(addr|ws,Index_Invalidate_I);
+@@ -357,6 +417,7 @@
+ current_cpu_data.icache.waybit;
+ unsigned long ws, addr;
+
++ BCM4710_FILL_TLB(start);
+ for (ws = 0; ws < ws_end; ws += ws_inc)
+ for (addr = start; addr < end; addr += 0x400)
+ cache32_unroll32(addr|ws,Index_Invalidate_I);
+@@ -471,6 +532,7 @@
+ 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 2005-12-04 06:10:42.000000000 +0100
++++ linux.dev/include/asm-mips/stackframe.h 2005-12-18 05:33:02.405302250 +0100
+@@ -285,6 +285,10 @@
+ .macro RESTORE_SP_AND_RET
+ LONG_L sp, PT_R29(sp)
+ .set mips3
++#ifdef CONFIG_BCM4710
++ nop
++ nop
++#endif
+ eret
+ .set mips0
+ .endm
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