openwrt/target/linux/brcm47xx/patches-4.0/920-cache-wround.patch

--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -28,10 +28,28 @@ extern void (*r4k_blast_icache)(void);
 #ifdef CONFIG_BCM47XX
 #include <asm/paccess.h>
 #include <linux/ssb/ssb.h>
-#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE)))
+#define BCM4710_DUMMY_RREG() bcm4710_dummy_rreg()
+
+static inline unsigned long bcm4710_dummy_rreg(void)
+{
+      return *(volatile unsigned long *)(KSEG1ADDR(SSB_ENUM_BASE));
+}
+
+#define BCM4710_FILL_TLB(addr) bcm4710_fill_tlb((void *)(addr))
+
+static inline unsigned long bcm4710_fill_tlb(void *addr)
+{
+      return *(unsigned long *)addr;
+}
+
+#define BCM4710_PROTECTED_FILL_TLB(addr) bcm4710_protected_fill_tlb((void *)(addr))
+
+static inline void bcm4710_protected_fill_tlb(void *addr)
+{
+      unsigned long x;
+      get_dbe(x, (unsigned long *)addr);;
+}
 
-#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()
 
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -924,6 +924,9 @@ build_get_pgde32(u32 **p, unsigned int t
 		uasm_i_srl(p, ptr, ptr, SMP_CPUID_PTRSHIFT);
 		uasm_i_addu(p, ptr, tmp, ptr);
 #else
+#ifdef CONFIG_BCM47XX
+		uasm_i_nop(p);
+#endif
 		UASM_i_LA_mostly(p, ptr, pgdc);
 #endif
 		uasm_i_mfc0(p, tmp, C0_BADVADDR); /* get faulting address */
@@ -1269,12 +1272,12 @@ static void build_r4000_tlb_refill_handl
 			/* 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
+# ifdef CONFIG_BCM47XX
+		uasm_i_nop(&p);
+# endif
 		build_get_pgde32(&p, K0, K1); /* get pgd in K1 */
 #endif
 
@@ -1286,6 +1289,9 @@ static void build_r4000_tlb_refill_handl
 		build_update_entries(&p, K0, K1);
 		build_tlb_write_entry(&p, &l, &r, tlb_random);
 		uasm_l_leave(&l, p);
+#ifdef CONFIG_BCM47XX
+		uasm_i_nop(&p);
+#endif
 		uasm_i_eret(&p); /* return from trap */
 	}
 #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
@@ -1834,12 +1840,12 @@ build_r4000_tlbchange_handler_head(u32 *
 {
 	struct work_registers wr = build_get_work_registers(p);
 
-#ifdef CONFIG_BCM47XX
-	uasm_i_nop(p);
-#endif
 #ifdef CONFIG_64BIT
 	build_get_pmde64(p, l, r, wr.r1, wr.r2); /* get pmd in ptr */
 #else
+# ifdef CONFIG_BCM47XX
+	uasm_i_nop(p);
+# endif
 	build_get_pgde32(p, wr.r1, wr.r2); /* get pgd in ptr */
 #endif
 
@@ -1886,6 +1892,9 @@ build_r4000_tlbchange_handler_tail(u32 *
 	build_tlb_write_entry(p, l, r, tlb_indexed);
 	uasm_l_leave(l, *p);
 	build_restore_work_registers(p);
+#ifdef CONFIG_BCM47XX
+	uasm_i_nop(p);
+#endif
 	uasm_i_eret(p); /* return from trap */
 
 #ifdef CONFIG_64BIT
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -21,6 +21,19 @@
 #include <asm/war.h>
 #include <asm/thread_info.h>
 
+#ifdef CONFIG_BCM47XX
+# ifdef eret
+#  undef eret
+# endif
+# define eret 					\
+	.set push;				\
+	.set noreorder;				\
+	 nop; 					\
+	 nop;					\
+	 eret;					\
+	.set pop;
+#endif
+
 	__INIT
 
 /*
@@ -34,7 +47,6 @@ NESTED(except_vec3_generic, 0, sp)
 	.set	noat
 #ifdef CONFIG_BCM47XX
 	nop
-	nop
 #endif
 #if R5432_CP0_INTERRUPT_WAR
 	mfc0	k0, CP0_INDEX
@@ -59,6 +71,9 @@ NESTED(except_vec3_r4000, 0, sp)
 	.set	push
 	.set	arch=r4000
 	.set	noat
+#ifdef CONFIG_BCM47XX
+	nop
+#endif
 	mfc0	k1, CP0_CAUSE
 	li	k0, 31<<2
 	andi	k1, k1, 0x7c