openwrt/openwrt/target/linux/linux-2.4/patches/brcm/004-bcm94710_mmu.patch

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	2005-05-28 17:42:06.000000000 +0200
+++ linux.dev/arch/mips/mm/c-r4k.c	2005-05-29 18:26:34.000000000 +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>
@@ -390,6 +396,11 @@
 			addr = start & ~(dc_lsize - 1);
 			aend = (end - 1) & ~(dc_lsize - 1);
 
+#ifdef CONFIG_BCM4710
+			BCM4710_FILL_TLB(addr);
+			BCM4710_FILL_TLB(aend);
+#endif
+
 			while (1) {
 				/* Hit_Writeback_Inv_D */
 				protected_writeback_dcache_line(addr);
@@ -509,6 +520,10 @@
 		R4600_HIT_CACHEOP_WAR_IMPL;
 		a = addr & ~(dc_lsize - 1);
 		end = (addr + size - 1) & ~(dc_lsize - 1);
+#ifdef CONFIG_BCM4710
+		BCM4710_FILL_TLB(a);
+		BCM4710_FILL_TLB(end);
+#endif
 		while (1) {
 			flush_dcache_line(a);	/* Hit_Writeback_Inv_D */
 			if (a == end)
@@ -576,6 +591,10 @@
 	unsigned long ic_lsize = current_cpu_data.icache.linesz;
 	unsigned long dc_lsize = current_cpu_data.dcache.linesz;
 
+#ifdef CONFIG_BCM4710
+	BCM4710_PROTECTED_FILL_TLB(addr);
+	BCM4710_PROTECTED_FILL_TLB(addr + 4);
+#endif
 	R4600_HIT_CACHEOP_WAR_IMPL;
 	protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
 	protected_flush_icache_line(addr & ~(ic_lsize - 1));
diff -urN linux.old/include/asm-mips/r4kcache.h linux.dev/include/asm-mips/r4kcache.h
--- linux.old/include/asm-mips/r4kcache.h	2005-05-28 17:42:06.000000000 +0200
+++ linux.dev/include/asm-mips/r4kcache.h	2005-05-29 18:34:46.000000000 +0200
@@ -15,6 +15,25 @@
 #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)); })
+
+#define cache_op(op,addr)						\
+	BCM4710_DUMMY_RREG();						\
+	__asm__ __volatile__(						\
+	"	.set	noreorder				\n"	\
+	"	.set	mips3\n\t				\n"	\
+	"	cache	%0, %1					\n"	\
+	"	.set	mips0					\n"	\
+	"	.set	reorder"					\
+	:								\
+	: "i" (op), "m" (*(unsigned char *)(addr)))
+
+#else
+
 #define cache_op(op,addr)						\
 	__asm__ __volatile__(						\
 	"	.set	noreorder				\n"	\
@@ -24,6 +43,8 @@
 	"	.set	reorder"					\
 	:								\
 	: "i" (op), "m" (*(unsigned char *)(addr)))
+#endif
+
 
 static inline void flush_icache_line_indexed(unsigned long addr)
 {
@@ -47,6 +68,10 @@
 
 static inline void flush_dcache_line(unsigned long addr)
 {
+
+#ifdef CONFIG_BCM4710	
+	BCM4710_DUMMY_RREG();
+#endif
 	cache_op(Hit_Writeback_Inv_D, addr);
 }
 
@@ -196,7 +221,13 @@
 	unsigned long start = page;
 	unsigned long end = start + PAGE_SIZE;
 
+#ifdef CONFIG_BCM4710	
+	BCM4710_FILL_TLB(start);
+#endif
 	do {
+#ifdef CONFIG_BCM4710	
+		BCM4710_DUMMY_RREG();
+#endif
 		cache16_unroll32(start,Hit_Invalidate_I);
 		start += 0x200;
 	} while (start < end);
@@ -291,8 +322,12 @@
 	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) {
+#ifdef CONFIG_BCM4710	
+			BCM4710_DUMMY_RREG();
+#endif
 			cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+		}
 }
 
 static inline void blast_dcache32_page(unsigned long page)
@@ -300,6 +335,9 @@
 	unsigned long start = page;
 	unsigned long end = start + PAGE_SIZE;
 
+#ifdef CONFIG_BCM4710	
+	__asm__ __volatile__("nop;nop;nop;nop");
+#endif
 	do {
 		cache32_unroll32(start,Hit_Writeback_Inv_D);
 		start += 0x400;
@@ -339,6 +377,9 @@
 	unsigned long start = page;
 	unsigned long end = start + PAGE_SIZE;
 
+#ifdef CONFIG_BCM4710	
+	BCM4710_FILL_TLB(start);
+#endif
 	do {
 		cache32_unroll32(start,Hit_Invalidate_I);
 		start += 0x400;