diff options
Diffstat (limited to 'arch/mips/mm/tlbex.c')
| -rw-r--r-- | arch/mips/mm/tlbex.c | 132 |
1 files changed, 119 insertions, 13 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 820e6612d74..4d46d378757 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -29,6 +29,7 @@ #include <linux/init.h> #include <linux/cache.h> +#include <asm/mmu_context.h> #include <asm/cacheflush.h> #include <asm/pgtable.h> #include <asm/war.h> @@ -305,6 +306,78 @@ static struct uasm_reloc relocs[128] __cpuinitdata; static int check_for_high_segbits __cpuinitdata; #endif +static void __cpuinit insn_fixup(unsigned int **start, unsigned int **stop, + unsigned int i_const) +{ + unsigned int **p; + + for (p = start; p < stop; p++) { +#ifndef CONFIG_CPU_MICROMIPS + unsigned int *ip; + + ip = *p; + *ip = (*ip & 0xffff0000) | i_const; +#else + unsigned short *ip; + + ip = ((unsigned short *)((unsigned int)*p - 1)); + if ((*ip & 0xf000) == 0x4000) { + *ip &= 0xfff1; + *ip |= (i_const << 1); + } else if ((*ip & 0xf000) == 0x6000) { + *ip &= 0xfff1; + *ip |= ((i_const >> 2) << 1); + } else { + ip++; + *ip = i_const; + } +#endif + local_flush_icache_range((unsigned long)ip, + (unsigned long)ip + sizeof(*ip)); + } +} + +#define asid_insn_fixup(section, const) \ +do { \ + extern unsigned int *__start_ ## section; \ + extern unsigned int *__stop_ ## section; \ + insn_fixup(&__start_ ## section, &__stop_ ## section, const); \ +} while(0) + +/* + * Caller is assumed to flush the caches before the first context switch. + */ +static void __cpuinit setup_asid(unsigned int inc, unsigned int mask, + unsigned int version_mask, + unsigned int first_version) +{ + extern asmlinkage void handle_ri_rdhwr_vivt(void); + unsigned long *vivt_exc; + +#ifdef CONFIG_CPU_MICROMIPS + /* + * Worst case optimised microMIPS addiu instructions support + * only a 3-bit immediate value. + */ + if(inc > 7) + panic("Invalid ASID increment value!"); +#endif + asid_insn_fixup(__asid_inc, inc); + asid_insn_fixup(__asid_mask, mask); + asid_insn_fixup(__asid_version_mask, version_mask); + asid_insn_fixup(__asid_first_version, first_version); + + /* Patch up the 'handle_ri_rdhwr_vivt' handler. */ + vivt_exc = (unsigned long *) &handle_ri_rdhwr_vivt; +#ifdef CONFIG_CPU_MICROMIPS + vivt_exc = (unsigned long *)((unsigned long) vivt_exc - 1); +#endif + vivt_exc++; + *vivt_exc = (*vivt_exc & ~mask) | mask; + + current_cpu_data.asid_cache = first_version; +} + static int check_for_high_segbits __cpuinitdata; static unsigned int kscratch_used_mask __cpuinitdata; @@ -1458,17 +1531,17 @@ u32 handle_tlbl[FASTPATH_SIZE] __cacheline_aligned; u32 handle_tlbs[FASTPATH_SIZE] __cacheline_aligned; u32 handle_tlbm[FASTPATH_SIZE] __cacheline_aligned; #ifdef CONFIG_MIPS_PGD_C0_CONTEXT -u32 tlbmiss_handler_setup_pgd[16] __cacheline_aligned; +u32 tlbmiss_handler_setup_pgd_array[16] __cacheline_aligned; static void __cpuinit build_r4000_setup_pgd(void) { const int a0 = 4; const int a1 = 5; - u32 *p = tlbmiss_handler_setup_pgd; + u32 *p = tlbmiss_handler_setup_pgd_array; struct uasm_label *l = labels; struct uasm_reloc *r = relocs; - memset(tlbmiss_handler_setup_pgd, 0, sizeof(tlbmiss_handler_setup_pgd)); + memset(tlbmiss_handler_setup_pgd_array, 0, sizeof(tlbmiss_handler_setup_pgd_array)); memset(labels, 0, sizeof(labels)); memset(relocs, 0, sizeof(relocs)); @@ -1496,15 +1569,15 @@ static void __cpuinit build_r4000_setup_pgd(void) uasm_i_jr(&p, 31); UASM_i_MTC0(&p, a0, 31, pgd_reg); } - if (p - tlbmiss_handler_setup_pgd > ARRAY_SIZE(tlbmiss_handler_setup_pgd)) - panic("tlbmiss_handler_setup_pgd space exceeded"); + if (p - tlbmiss_handler_setup_pgd_array > ARRAY_SIZE(tlbmiss_handler_setup_pgd_array)) + panic("tlbmiss_handler_setup_pgd_array space exceeded"); uasm_resolve_relocs(relocs, labels); - pr_debug("Wrote tlbmiss_handler_setup_pgd (%u instructions).\n", - (unsigned int)(p - tlbmiss_handler_setup_pgd)); + pr_debug("Wrote tlbmiss_handler_setup_pgd_array (%u instructions).\n", + (unsigned int)(p - tlbmiss_handler_setup_pgd_array)); dump_handler("tlbmiss_handler", - tlbmiss_handler_setup_pgd, - ARRAY_SIZE(tlbmiss_handler_setup_pgd)); + tlbmiss_handler_setup_pgd_array, + ARRAY_SIZE(tlbmiss_handler_setup_pgd_array)); } #endif @@ -2030,6 +2103,13 @@ static void __cpuinit build_r4000_tlb_load_handler(void) uasm_l_nopage_tlbl(&l, p); build_restore_work_registers(&p); +#ifdef CONFIG_CPU_MICROMIPS + if ((unsigned long)tlb_do_page_fault_0 & 1) { + uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_0)); + uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_0)); + uasm_i_jr(&p, K0); + } else +#endif uasm_i_j(&p, (unsigned long)tlb_do_page_fault_0 & 0x0fffffff); uasm_i_nop(&p); @@ -2077,6 +2157,13 @@ static void __cpuinit build_r4000_tlb_store_handler(void) uasm_l_nopage_tlbs(&l, p); build_restore_work_registers(&p); +#ifdef CONFIG_CPU_MICROMIPS + if ((unsigned long)tlb_do_page_fault_1 & 1) { + uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_1)); + uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_1)); + uasm_i_jr(&p, K0); + } else +#endif uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); uasm_i_nop(&p); @@ -2125,6 +2212,13 @@ static void __cpuinit build_r4000_tlb_modify_handler(void) uasm_l_nopage_tlbm(&l, p); build_restore_work_registers(&p); +#ifdef CONFIG_CPU_MICROMIPS + if ((unsigned long)tlb_do_page_fault_1 & 1) { + uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_1)); + uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_1)); + uasm_i_jr(&p, K0); + } else +#endif uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); uasm_i_nop(&p); @@ -2162,8 +2256,12 @@ void __cpuinit build_tlb_refill_handler(void) case CPU_TX3922: case CPU_TX3927: #ifndef CONFIG_MIPS_PGD_C0_CONTEXT - build_r3000_tlb_refill_handler(); + setup_asid(0x40, 0xfc0, 0xf000, ASID_FIRST_VERSION_R3000); + if (cpu_has_local_ebase) + build_r3000_tlb_refill_handler(); if (!run_once) { + if (!cpu_has_local_ebase) + build_r3000_tlb_refill_handler(); build_r3000_tlb_load_handler(); build_r3000_tlb_store_handler(); build_r3000_tlb_modify_handler(); @@ -2184,6 +2282,11 @@ void __cpuinit build_tlb_refill_handler(void) break; default: +#ifndef CONFIG_MIPS_MT_SMTC + setup_asid(0x1, 0xff, 0xff00, ASID_FIRST_VERSION_R4000); +#else + setup_asid(0x1, smtc_asid_mask, 0xff00, ASID_FIRST_VERSION_R4000); +#endif if (!run_once) { scratch_reg = allocate_kscratch(); #ifdef CONFIG_MIPS_PGD_C0_CONTEXT @@ -2192,9 +2295,12 @@ void __cpuinit build_tlb_refill_handler(void) build_r4000_tlb_load_handler(); build_r4000_tlb_store_handler(); build_r4000_tlb_modify_handler(); + if (!cpu_has_local_ebase) + build_r4000_tlb_refill_handler(); run_once++; } - build_r4000_tlb_refill_handler(); + if (cpu_has_local_ebase) + build_r4000_tlb_refill_handler(); } } @@ -2207,7 +2313,7 @@ void __cpuinit flush_tlb_handlers(void) local_flush_icache_range((unsigned long)handle_tlbm, (unsigned long)handle_tlbm + sizeof(handle_tlbm)); #ifdef CONFIG_MIPS_PGD_C0_CONTEXT - local_flush_icache_range((unsigned long)tlbmiss_handler_setup_pgd, - (unsigned long)tlbmiss_handler_setup_pgd + sizeof(handle_tlbm)); + local_flush_icache_range((unsigned long)tlbmiss_handler_setup_pgd_array, + (unsigned long)tlbmiss_handler_setup_pgd_array + sizeof(handle_tlbm)); #endif } |