add initial 2.6.28 support for brcm47xx target

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 13909

1 files changed, 370 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-2.6.28/150-cpu_fixes.patch b/target/linux/brcm47xx/patches-2.6.28/150-cpu_fixes.patch
new file mode 100644
index 0000000..e3d8899
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.28/150-cpu_fixes.patch
@@ -0,0 +1,370 @@
+diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
+--- a/arch/mips/include/asm/r4kcache.h
++++ b/arch/mips/include/asm/r4kcache.h
+@@ -17,6 +17,20 @@
+ #include <asm/cpu-features.h>
+ #include <asm/mipsmtregs.h>
+ 
++#ifdef CONFIG_BCM47XX
++#include <asm/paccess.h>
++#include <linux/ssb/ssb.h>
++#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE + SSB_IMSTATE)))
++
++#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:
+@@ -150,6 +164,7 @@ static inline void flush_icache_line_indexed(unsigned long addr)
+ static inline void flush_dcache_line_indexed(unsigned long addr)
+ {
+ 	__dflush_prologue
++	BCM4710_DUMMY_RREG();
+ 	cache_op(Index_Writeback_Inv_D, addr);
+ 	__dflush_epilogue
+ }
+@@ -169,6 +184,7 @@ static inline void flush_icache_line(unsigned long addr)
+ static inline void flush_dcache_line(unsigned long addr)
+ {
+ 	__dflush_prologue
++	BCM4710_DUMMY_RREG();
+ 	cache_op(Hit_Writeback_Inv_D, addr);
+ 	__dflush_epilogue
+ }
+@@ -176,6 +192,7 @@ static inline void flush_dcache_line(unsigned long addr)
+ static inline void invalidate_dcache_line(unsigned long addr)
+ {
+ 	__dflush_prologue
++	BCM4710_DUMMY_RREG();
+ 	cache_op(Hit_Invalidate_D, addr);
+ 	__dflush_epilogue
+ }
+@@ -208,6 +225,7 @@ static inline void flush_scache_line(unsigned long addr)
+  */
+ static inline void protected_flush_icache_line(unsigned long addr)
+ {
++	BCM4710_DUMMY_RREG();
+ 	protected_cache_op(Hit_Invalidate_I, addr);
+ }
+ 
+@@ -219,6 +237,7 @@ static inline void protected_flush_icache_line(unsigned long addr)
+  */
+ static inline void protected_writeback_dcache_line(unsigned long addr)
+ {
++	BCM4710_DUMMY_RREG();
+ 	protected_cache_op(Hit_Writeback_Inv_D, addr);
+ }
+ 
+@@ -339,8 +358,52 @@ static inline void invalidate_tcache_page(unsigned long addr)
+ 		: "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);
++		}
++	}
++}
++
++
+ /* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
+-#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
++#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, war) \
+ static inline void blast_##pfx##cache##lsize(void)			\
+ {									\
+ 	unsigned long start = INDEX_BASE;				\
+@@ -352,6 +415,7 @@ static inline void blast_##pfx##cache##lsize(void)			\
+ 									\
+ 	__##pfx##flush_prologue						\
+ 									\
++	war								\
+ 	for (ws = 0; ws < ws_end; ws += ws_inc)				\
+ 		for (addr = start; addr < end; addr += lsize * 32)	\
+ 			cache##lsize##_unroll32(addr|ws, indexop);	\
+@@ -366,6 +430,7 @@ static inline void blast_##pfx##cache##lsize##_page(unsigned long page)	\
+ 									\
+ 	__##pfx##flush_prologue						\
+ 									\
++	war								\
+ 	do {								\
+ 		cache##lsize##_unroll32(start, hitop);			\
+ 		start += lsize * 32;					\
+@@ -384,6 +449,8 @@ static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page)
+ 	                       current_cpu_data.desc.waybit;		\
+ 	unsigned long ws, addr;						\
+ 									\
++	war								\
++									\
+ 	__##pfx##flush_prologue						\
+ 									\
+ 	for (ws = 0; ws < ws_end; ws += ws_inc)				\
+@@ -393,35 +460,37 @@ static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page)
+ 	__##pfx##flush_epilogue						\
+ }
+ 
+-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
+-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
+-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
+-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
+-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
+-
+-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
+-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
+-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
+-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
+-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
+-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128)
++__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, )
++__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16, BCM4710_FILL_TLB(start);)
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16, )
++__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32, )
++__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32, BCM4710_FILL_TLB(start);)
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, )
++__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, BCM4710_FILL_TLB(start);)
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, )
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, )
++
++__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
++__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, )
++__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, )
++__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, )
++__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )
++__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, )
+ 
+ /* build blast_xxx_range, protected_blast_xxx_range */
+-#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
++#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, war, war2) \
+ static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
+ 						    unsigned long end)	\
+ {									\
+ 	unsigned long lsize = cpu_##desc##_line_size();			\
+ 	unsigned long addr = start & ~(lsize - 1);			\
+ 	unsigned long aend = (end - 1) & ~(lsize - 1);			\
++	war								\
+ 									\
+ 	__##pfx##flush_prologue						\
+ 									\
+ 	while (1) {							\
++		war2						\
+ 		prot##cache_op(hitop, addr);				\
+ 		if (addr == aend)					\
+ 			break;						\
+@@ -431,13 +500,13 @@ static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
+ 	__##pfx##flush_epilogue						\
+ }
+ 
+-__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
+-__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, )
+-__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
++__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 --git a/arch/mips/include/asm/stackframe.h b/arch/mips/include/asm/stackframe.h
+--- a/arch/mips/include/asm/stackframe.h
++++ b/arch/mips/include/asm/stackframe.h
+@@ -409,6 +409,10 @@
+ 		.macro	RESTORE_SP_AND_RET
+ 		LONG_L	sp, PT_R29(sp)
+ 		.set	mips3
++#ifdef CONFIG_BCM47XX
++		nop
++		nop
++#endif
+ 		eret
+ 		.set	mips0
+ 		.endm
+diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
+--- a/arch/mips/kernel/genex.S
++++ b/arch/mips/kernel/genex.S
+@@ -52,6 +52,10 @@ NESTED(except_vec1_generic, 0, sp)
+ NESTED(except_vec3_generic, 0, sp)
+ 	.set	push
+ 	.set	noat
++#ifdef CONFIG_BCM47XX
++	nop
++	nop
++#endif
+ #if R5432_CP0_INTERRUPT_WAR
+ 	mfc0	k0, CP0_INDEX
+ #endif
+diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
+--- a/arch/mips/mm/c-r4k.c
++++ b/arch/mips/mm/c-r4k.c
+@@ -34,6 +34,9 @@
+ #include <asm/cacheflush.h> /* for run_uncached() */
+ 
+ 
++/* For enabling BCM4710 cache workarounds */
++int bcm4710 = 0;
++
+ /*
+  * Special Variant of smp_call_function for use by cache functions:
+  *
+@@ -104,6 +107,9 @@ static void __cpuinit r4k_blast_dcache_page_setup(void)
+ {
+ 	unsigned long  dc_lsize = cpu_dcache_line_size();
+ 
++	if (bcm4710)
++		r4k_blast_dcache_page = blast_dcache_page;
++	else
+ 	if (dc_lsize == 0)
+ 		r4k_blast_dcache_page = (void *)cache_noop;
+ 	else if (dc_lsize == 16)
+@@ -118,6 +124,9 @@ static void __cpuinit r4k_blast_dcache_page_indexed_setup(void)
+ {
+ 	unsigned long dc_lsize = cpu_dcache_line_size();
+ 
++	if (bcm4710)
++		r4k_blast_dcache_page_indexed = blast_dcache_page_indexed;
++	else
+ 	if (dc_lsize == 0)
+ 		r4k_blast_dcache_page_indexed = (void *)cache_noop;
+ 	else if (dc_lsize == 16)
+@@ -132,6 +141,9 @@ static void __cpuinit r4k_blast_dcache_setup(void)
+ {
+ 	unsigned long dc_lsize = cpu_dcache_line_size();
+ 
++	if (bcm4710)
++		r4k_blast_dcache = blast_dcache;
++	else
+ 	if (dc_lsize == 0)
+ 		r4k_blast_dcache = (void *)cache_noop;
+ 	else if (dc_lsize == 16)
+@@ -647,6 +659,8 @@ static void local_r4k_flush_cache_sigtramp(void * arg)
+ 	unsigned long addr = (unsigned long) arg;
+ 
+ 	R4600_HIT_CACHEOP_WAR_IMPL;
++	BCM4710_PROTECTED_FILL_TLB(addr);
++	BCM4710_PROTECTED_FILL_TLB(addr + 4);
+ 	if (dc_lsize)
+ 		protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
+ 	if (!cpu_icache_snoops_remote_store && scache_size)
+@@ -1271,6 +1285,17 @@ static void __cpuinit coherency_setup(void)
+ 	 * silly idea of putting something else there ...
+ 	 */
+ 	switch (current_cpu_type()) {
++	case CPU_BCM3302:
++		{
++			u32 cm;
++			cm = read_c0_diag();
++			/* Enable icache */
++			cm |= (1 << 31);
++			/* Enable dcache */
++			cm |= (1 << 30);
++			write_c0_diag(cm);
++		}
++		break;
+ 	case CPU_R4000PC:
+ 	case CPU_R4000SC:
+ 	case CPU_R4000MC:
+@@ -1328,6 +1353,15 @@ void __cpuinit r4k_cache_init(void)
+ 		break;
+ 	}
+ 
++	/* Check if special workarounds are required */
++#ifdef CONFIG_BCM47XX
++	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();
+ 
+@@ -1386,5 +1420,13 @@ void __cpuinit r4k_cache_init(void)
+ #if !defined(CONFIG_MIPS_CMP)
+ 	local_r4k___flush_cache_all(NULL);
+ #endif
++#ifdef CONFIG_BCM47XX
++	{
++		static void (*_coherency_setup)(void);
++		_coherency_setup = (void (*)(void)) KSEG1ADDR(coherency_setup);
++		_coherency_setup();
++	}
++#else
+ 	coherency_setup();
++#endif
+ }
+diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
+--- a/arch/mips/mm/tlbex.c
++++ b/arch/mips/mm/tlbex.c
+@@ -678,6 +678,9 @@ static void __cpuinit build_r4000_tlb_refill_handler(void)
+ 		/* No need for uasm_i_nop */
+ 	}
+ 
++#ifdef CONFIG_BCM47XX
++	uasm_i_nop(&p);
++#endif
+ #ifdef CONFIG_64BIT
+ 	build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */
+ #else
+@@ -1085,6 +1088,9 @@ build_r4000_tlbchange_handler_head(u32 **p, struct uasm_label **l,
+ 				   struct uasm_reloc **r, unsigned int pte,
+ 				   unsigned int ptr)
+ {
++#ifdef CONFIG_BCM47XX
++	uasm_i_nop(p);
++#endif
+ #ifdef CONFIG_64BIT
+ 	build_get_pmde64(p, l, r, pte, ptr); /* get pmd in ptr */
+ #else