diff options
author | Richard Henderson <richard.henderson@linaro.org> | 2018-05-22 19:36:27 -0700 |
---|---|---|
committer | Stafford Horne <shorne@gmail.com> | 2018-07-03 00:05:28 +0900 |
commit | 2acaa2331b96ee92f0df213784f9b6454c3d5edc (patch) | |
tree | 9d7ab5c3ccdb64dd7e462810e81e63571ea2f4fa | |
parent | fd992ee7e3fb12aea888744313a2869c8848ef9d (diff) |
target/openrisc: Reduce tlb to a single dimension
While we had defines for *_WAYS, we didn't define more than 1.
Reduce the complexity by eliminating this unused dimension.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
-rw-r--r-- | target/openrisc/cpu.h | 6 | ||||
-rw-r--r-- | target/openrisc/machine.c | 6 | ||||
-rw-r--r-- | target/openrisc/mmu.c | 30 | ||||
-rw-r--r-- | target/openrisc/sys_helper.c | 20 |
4 files changed, 30 insertions, 32 deletions
diff --git a/target/openrisc/cpu.h b/target/openrisc/cpu.h index a27adad085..eaf6cdd40e 100644 --- a/target/openrisc/cpu.h +++ b/target/openrisc/cpu.h @@ -222,10 +222,8 @@ enum { /* TLB size */ enum { - DTLB_WAYS = 1, DTLB_SIZE = 64, DTLB_MASK = (DTLB_SIZE-1), - ITLB_WAYS = 1, ITLB_SIZE = 64, ITLB_MASK = (ITLB_SIZE-1), }; @@ -256,8 +254,8 @@ typedef struct OpenRISCTLBEntry { #ifndef CONFIG_USER_ONLY typedef struct CPUOpenRISCTLBContext { - OpenRISCTLBEntry itlb[ITLB_WAYS][ITLB_SIZE]; - OpenRISCTLBEntry dtlb[DTLB_WAYS][DTLB_SIZE]; + OpenRISCTLBEntry itlb[ITLB_SIZE]; + OpenRISCTLBEntry dtlb[DTLB_SIZE]; int (*cpu_openrisc_map_address_code)(struct OpenRISCCPU *cpu, hwaddr *physical, diff --git a/target/openrisc/machine.c b/target/openrisc/machine.c index 73e0abcfd7..b795b56dc6 100644 --- a/target/openrisc/machine.c +++ b/target/openrisc/machine.c @@ -42,11 +42,9 @@ static const VMStateDescription vmstate_cpu_tlb = { .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField[]) { - VMSTATE_STRUCT_2DARRAY(itlb, CPUOpenRISCTLBContext, - ITLB_WAYS, ITLB_SIZE, 0, + VMSTATE_STRUCT_ARRAY(itlb, CPUOpenRISCTLBContext, ITLB_SIZE, 0, vmstate_tlb_entry, OpenRISCTLBEntry), - VMSTATE_STRUCT_2DARRAY(dtlb, CPUOpenRISCTLBContext, - DTLB_WAYS, DTLB_SIZE, 0, + VMSTATE_STRUCT_ARRAY(dtlb, CPUOpenRISCTLBContext, DTLB_SIZE, 0, vmstate_tlb_entry, OpenRISCTLBEntry), VMSTATE_END_OF_LIST() } diff --git a/target/openrisc/mmu.c b/target/openrisc/mmu.c index 9b4b5cf04f..856969a7f2 100644 --- a/target/openrisc/mmu.c +++ b/target/openrisc/mmu.c @@ -43,19 +43,21 @@ static int get_phys_code(OpenRISCCPU *cpu, hwaddr *physical, int *prot, int vpn = address >> TARGET_PAGE_BITS; int idx = vpn & ITLB_MASK; int right = 0; + uint32_t mr = cpu->env.tlb.itlb[idx].mr; + uint32_t tr = cpu->env.tlb.itlb[idx].tr; - if ((cpu->env.tlb.itlb[0][idx].mr >> TARGET_PAGE_BITS) != vpn) { + if ((mr >> TARGET_PAGE_BITS) != vpn) { return TLBRET_NOMATCH; } - if (!(cpu->env.tlb.itlb[0][idx].mr & 1)) { + if (!(mr & 1)) { return TLBRET_INVALID; } if (supervisor) { - if (cpu->env.tlb.itlb[0][idx].tr & SXE) { + if (tr & SXE) { right |= PAGE_EXEC; } } else { - if (cpu->env.tlb.itlb[0][idx].tr & UXE) { + if (tr & UXE) { right |= PAGE_EXEC; } } @@ -63,8 +65,7 @@ static int get_phys_code(OpenRISCCPU *cpu, hwaddr *physical, int *prot, return TLBRET_BADADDR; } - *physical = (cpu->env.tlb.itlb[0][idx].tr & TARGET_PAGE_MASK) | - (address & (TARGET_PAGE_SIZE-1)); + *physical = (tr & TARGET_PAGE_MASK) | (address & ~TARGET_PAGE_MASK); *prot = right; return TLBRET_MATCH; } @@ -75,25 +76,27 @@ static int get_phys_data(OpenRISCCPU *cpu, hwaddr *physical, int *prot, int vpn = address >> TARGET_PAGE_BITS; int idx = vpn & DTLB_MASK; int right = 0; + uint32_t mr = cpu->env.tlb.dtlb[idx].mr; + uint32_t tr = cpu->env.tlb.dtlb[idx].tr; - if ((cpu->env.tlb.dtlb[0][idx].mr >> TARGET_PAGE_BITS) != vpn) { + if ((mr >> TARGET_PAGE_BITS) != vpn) { return TLBRET_NOMATCH; } - if (!(cpu->env.tlb.dtlb[0][idx].mr & 1)) { + if (!(mr & 1)) { return TLBRET_INVALID; } if (supervisor) { - if (cpu->env.tlb.dtlb[0][idx].tr & SRE) { + if (tr & SRE) { right |= PAGE_READ; } - if (cpu->env.tlb.dtlb[0][idx].tr & SWE) { + if (tr & SWE) { right |= PAGE_WRITE; } } else { - if (cpu->env.tlb.dtlb[0][idx].tr & URE) { + if (tr & URE) { right |= PAGE_READ; } - if (cpu->env.tlb.dtlb[0][idx].tr & UWE) { + if (tr & UWE) { right |= PAGE_WRITE; } } @@ -105,8 +108,7 @@ static int get_phys_data(OpenRISCCPU *cpu, hwaddr *physical, int *prot, return TLBRET_BADADDR; } - *physical = (cpu->env.tlb.dtlb[0][idx].tr & TARGET_PAGE_MASK) | - (address & (TARGET_PAGE_SIZE-1)); + *physical = (tr & TARGET_PAGE_MASK) | (address & ~TARGET_PAGE_MASK); *prot = right; return TLBRET_MATCH; } diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c index 9b4339b34e..7f458b0d17 100644 --- a/target/openrisc/sys_helper.c +++ b/target/openrisc/sys_helper.c @@ -86,14 +86,14 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */ idx = spr - TO_SPR(1, 512); if (!(rb & 1)) { - tlb_flush_page(cs, env->tlb.dtlb[0][idx].mr & TARGET_PAGE_MASK); + tlb_flush_page(cs, env->tlb.dtlb[idx].mr & TARGET_PAGE_MASK); } - env->tlb.dtlb[0][idx].mr = rb; + env->tlb.dtlb[idx].mr = rb; break; case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */ idx = spr - TO_SPR(1, 640); - env->tlb.dtlb[0][idx].tr = rb; + env->tlb.dtlb[idx].tr = rb; break; case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ @@ -105,14 +105,14 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */ idx = spr - TO_SPR(2, 512); if (!(rb & 1)) { - tlb_flush_page(cs, env->tlb.itlb[0][idx].mr & TARGET_PAGE_MASK); + tlb_flush_page(cs, env->tlb.itlb[idx].mr & TARGET_PAGE_MASK); } - env->tlb.itlb[0][idx].mr = rb; + env->tlb.itlb[idx].mr = rb; break; case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */ idx = spr - TO_SPR(2, 640); - env->tlb.itlb[0][idx].tr = rb; + env->tlb.itlb[idx].tr = rb; break; case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ @@ -244,11 +244,11 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd, case TO_SPR(1, 512) ... TO_SPR(1, 512+DTLB_SIZE-1): /* DTLBW0MR 0-127 */ idx = spr - TO_SPR(1, 512); - return env->tlb.dtlb[0][idx].mr; + return env->tlb.dtlb[idx].mr; case TO_SPR(1, 640) ... TO_SPR(1, 640+DTLB_SIZE-1): /* DTLBW0TR 0-127 */ idx = spr - TO_SPR(1, 640); - return env->tlb.dtlb[0][idx].tr; + return env->tlb.dtlb[idx].tr; case TO_SPR(1, 768) ... TO_SPR(1, 895): /* DTLBW1MR 0-127 */ case TO_SPR(1, 896) ... TO_SPR(1, 1023): /* DTLBW1TR 0-127 */ @@ -260,11 +260,11 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd, case TO_SPR(2, 512) ... TO_SPR(2, 512+ITLB_SIZE-1): /* ITLBW0MR 0-127 */ idx = spr - TO_SPR(2, 512); - return env->tlb.itlb[0][idx].mr; + return env->tlb.itlb[idx].mr; case TO_SPR(2, 640) ... TO_SPR(2, 640+ITLB_SIZE-1): /* ITLBW0TR 0-127 */ idx = spr - TO_SPR(2, 640); - return env->tlb.itlb[0][idx].tr; + return env->tlb.itlb[idx].tr; case TO_SPR(2, 768) ... TO_SPR(2, 895): /* ITLBW1MR 0-127 */ case TO_SPR(2, 896) ... TO_SPR(2, 1023): /* ITLBW1TR 0-127 */ |