diff options
| -rw-r--r-- | target/linux/brcm47xx/patches-2.6.28/920-cache-wround.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.28/920-cache-wround.patch b/target/linux/brcm47xx/patches-2.6.28/920-cache-wround.patch new file mode 100644 index 0000000..9986f5a --- /dev/null +++ b/target/linux/brcm47xx/patches-2.6.28/920-cache-wround.patch @@ -0,0 +1,135 @@ +--- a/arch/mips/include/asm/r4kcache.h ++++ b/arch/mips/include/asm/r4kcache.h +@@ -20,10 +20,25 @@ + #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_DUMMY_RREG() bcm4710_dummy_rreg() ++ ++static inline unsigned long bcm4710_dummy_rreg(void) { ++ return (*(volatile unsigned long *)(KSEG1ADDR(SSB_ENUM_BASE + SSB_IMSTATE))); ++} ++ ++#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 +@@ -548,6 +548,9 @@ build_get_pgde32(u32 **p, unsigned int t + #endif + 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 */ +@@ -678,12 +681,12 @@ static void __cpuinit build_r4000_tlb_re + /* 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 + +@@ -691,6 +694,9 @@ static void __cpuinit build_r4000_tlb_re + 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_64BIT +@@ -1088,12 +1094,12 @@ build_r4000_tlbchange_handler_head(u32 * + 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 ++# ifdef CONFIG_BCM47XX ++ uasm_i_nop(p); ++# endif + build_get_pgde32(p, pte, ptr); /* get pgd in ptr */ + #endif + +@@ -1121,6 +1127,9 @@ build_r4000_tlbchange_handler_tail(u32 * + build_update_entries(p, tmp, ptr); + build_tlb_write_entry(p, l, r, tlb_indexed); + uasm_l_leave(l, *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 +@@ -22,6 +22,19 @@ + #include <asm/page.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 ++ + #define PANIC_PIC(msg) \ + .set push; \ + .set reorder; \ +@@ -54,7 +67,6 @@ NESTED(except_vec3_generic, 0, sp) + .set noat + #ifdef CONFIG_BCM47XX + nop +- nop + #endif + #if R5432_CP0_INTERRUPT_WAR + mfc0 k0, CP0_INDEX +@@ -79,6 +91,9 @@ NESTED(except_vec3_r4000, 0, sp) + .set push + .set mips3 + .set noat ++#ifdef CONFIG_BCM47XX ++ nop ++#endif + mfc0 k1, CP0_CAUSE + li k0, 31<<2 + andi k1, k1, 0x7c |