add bcm94710a0 cache workarounds to brcm47xx-2.6 (fix #1502)
SVN-Revision: 6649
This commit is contained in:
Felix Fietkau
parent
b04ef81416
commit
e224d3e42d
1 changed files with 316 additions and 6 deletions
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@ -1,6 +1,6 @@
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diff -urN linux-2.6.19.ref/arch/mips/kernel/genex.S linux-2.6.19/arch/mips/kernel/genex.S
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diff -ur linux.old/arch/mips/kernel/genex.S linux.dev/arch/mips/kernel/genex.S
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--- linux-2.6.19.ref/arch/mips/kernel/genex.S 2006-11-29 22:57:37.000000000 +0100
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--- linux.old/arch/mips/kernel/genex.S 2007-03-23 16:10:35.572499592 +0100
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+++ linux-2.6.19/arch/mips/kernel/genex.S 2006-12-04 21:34:09.000000000 +0100
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+++ linux.dev/arch/mips/kernel/genex.S 2007-03-16 11:54:34.901251992 +0100
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@@ -73,6 +73,10 @@
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@@ -73,6 +73,10 @@
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.set push
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.set push
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.set mips3
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.set mips3
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@ -12,9 +12,319 @@ diff -urN linux-2.6.19.ref/arch/mips/kernel/genex.S linux-2.6.19/arch/mips/kerne
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mfc0 k1, CP0_CAUSE
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mfc0 k1, CP0_CAUSE
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li k0, 31<<2
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li k0, 31<<2
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andi k1, k1, 0x7c
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andi k1, k1, 0x7c
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diff -urN linux-2.6.19.ref/include/asm-mips/stackframe.h linux-2.6.19/include/asm-mips/stackframe.h
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diff -ur linux.old/arch/mips/mm/c-r4k.c linux.dev/arch/mips/mm/c-r4k.c
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--- linux-2.6.19.ref/include/asm-mips/stackframe.h 2006-11-29 22:57:37.000000000 +0100
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--- linux.old/arch/mips/mm/c-r4k.c 2007-03-16 12:11:00.344441000 +0100
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+++ linux-2.6.19/include/asm-mips/stackframe.h 2006-12-04 21:34:09.000000000 +0100
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+++ linux.dev/arch/mips/mm/c-r4k.c 2007-03-23 16:03:23.596169976 +0100
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@@ -29,6 +29,9 @@
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#include <asm/cacheflush.h> /* for run_uncached() */
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+/* For enabling BCM4710 cache workarounds */
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+int bcm4710 = 0;
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+
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/*
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* Special Variant of smp_call_function for use by cache functions:
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*
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@@ -93,6 +96,9 @@
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{
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unsigned long dc_lsize = cpu_dcache_line_size();
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+ if (bcm4710)
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+ r4k_blast_dcache_page = blast_dcache_page;
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+ else
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if (dc_lsize == 0)
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r4k_blast_dcache_page = (void *)cache_noop;
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else if (dc_lsize == 16)
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@@ -107,6 +113,9 @@
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{
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unsigned long dc_lsize = cpu_dcache_line_size();
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+ if (bcm4710)
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+ r4k_blast_dcache_page_indexed = blast_dcache_page_indexed;
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+ else
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if (dc_lsize == 0)
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r4k_blast_dcache_page_indexed = (void *)cache_noop;
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else if (dc_lsize == 16)
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@@ -121,6 +130,9 @@
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{
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unsigned long dc_lsize = cpu_dcache_line_size();
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+ if (bcm4710)
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+ r4k_blast_dcache = blast_dcache;
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+ else
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if (dc_lsize == 0)
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r4k_blast_dcache = (void *)cache_noop;
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else if (dc_lsize == 16)
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@@ -538,6 +550,9 @@
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r4k_blast_icache();
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else
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protected_blast_icache_range(start, end);
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+
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+ if (bcm4710)
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+ r4k_flush_cache_all();
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}
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static void r4k_flush_icache_range(unsigned long start, unsigned long end)
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@@ -618,6 +633,8 @@
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unsigned long addr = (unsigned long) arg;
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R4600_HIT_CACHEOP_WAR_IMPL;
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+ BCM4710_PROTECTED_FILL_TLB(addr);
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+ BCM4710_PROTECTED_FILL_TLB(addr + 4);
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if (dc_lsize)
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protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
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if (!cpu_icache_snoops_remote_store && scache_size)
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@@ -1199,6 +1216,15 @@
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/* Default cache error handler for R4000 and R5000 family */
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set_uncached_handler (0x100, &except_vec2_generic, 0x80);
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+
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+ /* Check if special workarounds are required */
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+#ifdef CONFIG_BCM947XX
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+ if (current_cpu_data.cputype == CPU_BCM4710 && (current_cpu_data.processor_id & 0xff) == 0) {
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+ printk("Enabling BCM4710A0 cache workarounds.\n");
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+ bcm4710 = 1;
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+ } else
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+#endif
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+ bcm4710 = 0;
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probe_pcache();
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setup_scache();
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diff -ur linux.old/arch/mips/mm/tlbex.c linux.dev/arch/mips/mm/tlbex.c
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--- linux.old/arch/mips/mm/tlbex.c 2007-03-16 11:54:34.826263000 +0100
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+++ linux.dev/arch/mips/mm/tlbex.c 2007-03-23 16:03:23.608168152 +0100
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@@ -1174,6 +1174,10 @@
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#endif
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}
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+#ifdef CONFIG_BCM947XX
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+extern int bcm4710;
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+#endif
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+
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static void __init build_r4000_tlb_refill_handler(void)
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{
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u32 *p = tlb_handler;
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@@ -1188,6 +1192,12 @@
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memset(relocs, 0, sizeof(relocs));
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memset(final_handler, 0, sizeof(final_handler));
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+#ifdef CONFIG_BCM947XX
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+ if (bcm4710) {
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+ i_nop(&p);
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+ }
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+#endif
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+
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/*
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* create the plain linear handler
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*/
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diff -ur linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
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--- linux.old/include/asm-mips/r4kcache.h 2007-01-10 20:10:37.000000000 +0100
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+++ linux.dev/include/asm-mips/r4kcache.h 2007-03-23 16:38:44.603727816 +0100
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@@ -17,6 +17,20 @@
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#include <asm/cpu-features.h>
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#include <asm/mipsmtregs.h>
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+#ifdef CONFIG_BCM947XX
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+#include <asm/paccess.h>
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+#include <linux/ssb/ssb.h>
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+#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE + SSB_IMSTATE)))
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+
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+#define BCM4710_FILL_TLB(addr) (*(volatile unsigned long *)(addr))
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+#define BCM4710_PROTECTED_FILL_TLB(addr) ({ unsigned long x; get_dbe(x, (volatile unsigned long *)(addr)); })
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+#else
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+#define BCM4710_DUMMY_RREG()
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+
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+#define BCM4710_FILL_TLB(addr)
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+#define BCM4710_PROTECTED_FILL_TLB(addr)
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+#endif
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+
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/*
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* This macro return a properly sign-extended address suitable as base address
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* for indexed cache operations. Two issues here:
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@@ -150,6 +164,7 @@
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static inline void flush_dcache_line_indexed(unsigned long addr)
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{
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__dflush_prologue
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+ BCM4710_DUMMY_RREG();
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cache_op(Index_Writeback_Inv_D, addr);
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__dflush_epilogue
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}
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@@ -169,6 +184,7 @@
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static inline void flush_dcache_line(unsigned long addr)
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{
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__dflush_prologue
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+ BCM4710_DUMMY_RREG();
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cache_op(Hit_Writeback_Inv_D, addr);
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__dflush_epilogue
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}
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@@ -176,6 +192,7 @@
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static inline void invalidate_dcache_line(unsigned long addr)
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{
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__dflush_prologue
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+ BCM4710_DUMMY_RREG();
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cache_op(Hit_Invalidate_D, addr);
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__dflush_epilogue
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}
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@@ -208,6 +225,7 @@
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*/
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static inline void protected_flush_icache_line(unsigned long addr)
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{
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+ BCM4710_DUMMY_RREG();
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protected_cache_op(Hit_Invalidate_I, addr);
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}
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@@ -219,6 +237,7 @@
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*/
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static inline void protected_writeback_dcache_line(unsigned long addr)
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{
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+ BCM4710_DUMMY_RREG();
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protected_cache_op(Hit_Writeback_Inv_D, addr);
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}
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@@ -339,8 +358,52 @@
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: "r" (base), \
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"i" (op));
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+static inline void blast_dcache(void)
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+{
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+ unsigned long start = KSEG0;
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+ unsigned long dcache_size = current_cpu_data.dcache.waysize * current_cpu_data.dcache.ways;
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+ unsigned long end = (start + dcache_size);
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+
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+ do {
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+ BCM4710_DUMMY_RREG();
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+ cache_op(Index_Writeback_Inv_D, start);
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+ start += current_cpu_data.dcache.linesz;
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+ } while(start < end);
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+}
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+
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+static inline void blast_dcache_page(unsigned long page)
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+{
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+ unsigned long start = page;
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+ unsigned long end = start + PAGE_SIZE;
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+
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+ BCM4710_FILL_TLB(start);
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+ do {
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+ BCM4710_DUMMY_RREG();
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+ cache_op(Hit_Writeback_Inv_D, start);
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+ start += current_cpu_data.dcache.linesz;
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+ } while(start < end);
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+}
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+
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+static inline void blast_dcache_page_indexed(unsigned long page)
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+{
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+ unsigned long start = page;
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+ unsigned long end = start + PAGE_SIZE;
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+ unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
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+ unsigned long ws_end = current_cpu_data.dcache.ways <<
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+ current_cpu_data.dcache.waybit;
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+ unsigned long ws, addr;
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+ for (ws = 0; ws < ws_end; ws += ws_inc) {
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+ start = page + ws;
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+ for (addr = start; addr < end; addr += current_cpu_data.dcache.linesz) {
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+ BCM4710_DUMMY_RREG();
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+ cache_op(Index_Writeback_Inv_D, addr);
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+ }
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+ }
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+}
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+
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+
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/* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
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-#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
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+#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, war) \
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static inline void blast_##pfx##cache##lsize(void) \
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{ \
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unsigned long start = INDEX_BASE; \
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@@ -352,6 +415,7 @@
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\
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__##pfx##flush_prologue \
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\
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+ war \
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for (ws = 0; ws < ws_end; ws += ws_inc) \
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for (addr = start; addr < end; addr += lsize * 32) \
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cache##lsize##_unroll32(addr|ws,indexop); \
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@@ -366,6 +430,7 @@
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\
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__##pfx##flush_prologue \
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\
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+ war \
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do { \
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cache##lsize##_unroll32(start,hitop); \
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start += lsize * 32; \
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@@ -384,6 +449,8 @@
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current_cpu_data.desc.waybit; \
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unsigned long ws, addr; \
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\
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+ war \
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+ \
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__##pfx##flush_prologue \
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\
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for (ws = 0; ws < ws_end; ws += ws_inc) \
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@@ -393,28 +460,30 @@
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__##pfx##flush_epilogue \
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}
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-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
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-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
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-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
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-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
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-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
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-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
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-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
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-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
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-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
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+__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, )
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+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16, BCM4710_FILL_TLB(start);)
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+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16, )
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+__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32, )
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+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32, BCM4710_FILL_TLB(start);)
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+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, )
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+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, BCM4710_FILL_TLB(start);)
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+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, )
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+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, )
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/* build blast_xxx_range, protected_blast_xxx_range */
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-#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
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+#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, war, war2) \
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static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
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unsigned long end) \
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{ \
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unsigned long lsize = cpu_##desc##_line_size(); \
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unsigned long addr = start & ~(lsize - 1); \
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unsigned long aend = (end - 1) & ~(lsize - 1); \
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+ war \
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\
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__##pfx##flush_prologue \
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\
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while (1) { \
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+ war2 \
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prot##cache_op(hitop, addr); \
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if (addr == aend) \
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break; \
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@@ -424,13 +493,13 @@
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__##pfx##flush_epilogue \
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}
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-__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
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-__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
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-__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
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-__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
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-__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
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+__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, BCM4710_PROTECTED_FILL_TLB(addr); BCM4710_PROTECTED_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_,, )
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_,, )
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D,, BCM4710_FILL_TLB(addr); BCM4710_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD,,, )
|
||||||
|
/* blast_inv_dcache_range */
|
||||||
|
-__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
|
||||||
|
-__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D,,,BCM4710_DUMMY_RREG();)
|
||||||
|
+__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD,,, )
|
||||||
|
|
||||||
|
#endif /* _ASM_R4KCACHE_H */
|
||||||
|
diff -ur linux.old/include/asm-mips/stackframe.h linux.dev/include/asm-mips/stackframe.h
|
||||||
|
--- linux.old/include/asm-mips/stackframe.h 2007-03-23 16:10:35.573499440 +0100
|
||||||
|
+++ linux.dev/include/asm-mips/stackframe.h 2007-03-16 11:54:34.903251688 +0100
|
||||||
@@ -334,6 +334,10 @@
|
@@ -334,6 +334,10 @@
|
||||||
.macro RESTORE_SP_AND_RET
|
.macro RESTORE_SP_AND_RET
|
||||||
LONG_L sp, PT_R29(sp)
|
LONG_L sp, PT_R29(sp)
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue