mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 01:44:39 +02:00
f4aa4e469c
This is completly untested. Only a compile tests with the default config was done! git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17734 3c298f89-4303-0410-b956-a3cf2f4a3e73
368 lines
12 KiB
Diff
368 lines
12 KiB
Diff
--- a/arch/mips/include/asm/r4kcache.h
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+++ b/arch/mips/include/asm/r4kcache.h
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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_BCM47XX
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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 @@ static inline void flush_icache_line_ind
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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 @@ static inline void flush_icache_line(uns
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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 @@ static inline void flush_dcache_line(uns
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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 @@ static inline void flush_scache_line(uns
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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 @@ static inline void protected_flush_icach
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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 @@ static inline void invalidate_tcache_pag
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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 @@ static inline void blast_##pfx##cache##l
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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 @@ static inline void blast_##pfx##cache##l
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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 @@ static inline void blast_##pfx##cache##l
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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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@@ -393,36 +460,38 @@ static inline void blast_##pfx##cache##l
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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(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64)
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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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-
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-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
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-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
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-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
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-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
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-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
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-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_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(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64, )
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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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+
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+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
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+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, )
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+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, )
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+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, )
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+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )
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+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_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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@@ -432,13 +501,13 @@ static inline void prot##blast_##pfx##ca
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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();)
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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,, BCM4710_FILL_TLB(addr); BCM4710_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
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+__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD,,, )
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/* blast_inv_dcache_range */
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-__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
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-__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
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+__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D,,,BCM4710_DUMMY_RREG();)
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+__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD,,, )
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#endif /* _ASM_R4KCACHE_H */
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--- a/arch/mips/include/asm/stackframe.h
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+++ b/arch/mips/include/asm/stackframe.h
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@@ -426,6 +426,10 @@
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.macro RESTORE_SP_AND_RET
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LONG_L sp, PT_R29(sp)
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.set mips3
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+#ifdef CONFIG_BCM47XX
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+ nop
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+ nop
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+#endif
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eret
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.set mips0
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.endm
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--- a/arch/mips/kernel/genex.S
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+++ b/arch/mips/kernel/genex.S
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@@ -52,6 +52,10 @@ NESTED(except_vec1_generic, 0, sp)
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NESTED(except_vec3_generic, 0, sp)
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.set push
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.set noat
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+#ifdef CONFIG_BCM47XX
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+ nop
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+ nop
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+#endif
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#if R5432_CP0_INTERRUPT_WAR
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mfc0 k0, CP0_INDEX
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#endif
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--- a/arch/mips/mm/c-r4k.c
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+++ b/arch/mips/mm/c-r4k.c
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@@ -35,6 +35,9 @@
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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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@@ -111,6 +114,9 @@ static void __cpuinit r4k_blast_dcache_p
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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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@@ -127,6 +133,9 @@ static void __cpuinit r4k_blast_dcache_p
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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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@@ -143,6 +152,9 @@ static void __cpuinit r4k_blast_dcache_s
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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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@@ -680,6 +692,8 @@ static void local_r4k_flush_cache_sigtra
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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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@@ -1298,6 +1312,17 @@ static void __cpuinit coherency_setup(vo
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* silly idea of putting something else there ...
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*/
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switch (current_cpu_type()) {
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+ case CPU_BCM3302:
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+ {
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+ u32 cm;
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+ cm = read_c0_diag();
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+ /* Enable icache */
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+ cm |= (1 << 31);
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+ /* Enable dcache */
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+ cm |= (1 << 30);
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+ write_c0_diag(cm);
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+ }
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+ break;
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case CPU_R4000PC:
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case CPU_R4000SC:
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case CPU_R4000MC:
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@@ -1354,6 +1379,15 @@ void __cpuinit r4k_cache_init(void)
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break;
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}
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+ /* Check if special workarounds are required */
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+#ifdef CONFIG_BCM47XX
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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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+
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probe_pcache();
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setup_scache();
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@@ -1412,5 +1446,13 @@ void __cpuinit r4k_cache_init(void)
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#if !defined(CONFIG_MIPS_CMP)
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local_r4k___flush_cache_all(NULL);
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#endif
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+#ifdef CONFIG_BCM47XX
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+ {
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+ static void (*_coherency_setup)(void);
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+ _coherency_setup = (void (*)(void)) KSEG1ADDR(coherency_setup);
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+ _coherency_setup();
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+ }
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+#else
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coherency_setup();
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+#endif
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}
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--- a/arch/mips/mm/tlbex.c
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+++ b/arch/mips/mm/tlbex.c
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@@ -784,6 +784,9 @@ static void __cpuinit build_r4000_tlb_re
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/* No need for uasm_i_nop */
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}
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+#ifdef CONFIG_BCM47XX
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+ uasm_i_nop(&p);
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+#endif
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#ifdef CONFIG_64BIT
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build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */
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#else
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@@ -1238,6 +1241,9 @@ build_r4000_tlbchange_handler_head(u32 *
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struct uasm_reloc **r, unsigned int pte,
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unsigned int ptr)
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{
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+#ifdef CONFIG_BCM47XX
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+ uasm_i_nop(p);
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+#endif
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#ifdef CONFIG_64BIT
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build_get_pmde64(p, l, r, pte, ptr); /* get pmd in ptr */
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#else
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