From cec56a733dd2c3fa81dbedbecf03922258747f7d Mon Sep 17 00:00:00 2001 From: James Hogan Date: Tue, 18 Jul 2017 12:55:56 +0100 Subject: target/mips: Add segmentation control registers The optional segmentation control registers CP0_SegCtl0, CP0_SegCtl1 & CP0_SegCtl2 control the behaviour and required privilege of the legacy virtual memory segments. Add them to the CP0 interface so they can be read and written when CP0_Config3.SC=1, and initialise them to describe the standard legacy layout so they can be used in future patches regardless of whether they are exposed to the guest. Signed-off-by: James Hogan Cc: Yongbok Kim Cc: Aurelien Jarno Reviewed-by: Yongbok Kim Signed-off-by: Yongbok Kim --- target/mips/cpu.h | 30 +++++++++++++++++ target/mips/helper.h | 3 ++ target/mips/machine.c | 7 ++-- target/mips/op_helper.c | 24 ++++++++++++++ target/mips/translate.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 150 insertions(+), 2 deletions(-) diff --git a/target/mips/cpu.h b/target/mips/cpu.h index c24b1f64c6..74f6a5b098 100644 --- a/target/mips/cpu.h +++ b/target/mips/cpu.h @@ -306,6 +306,36 @@ struct CPUMIPSState { #define CP0PG_XIE 30 #define CP0PG_ELPA 29 #define CP0PG_IEC 27 + target_ulong CP0_SegCtl0; + target_ulong CP0_SegCtl1; + target_ulong CP0_SegCtl2; +#define CP0SC_PA 9 +#define CP0SC_PA_MASK (0x7FULL << CP0SC_PA) +#define CP0SC_PA_1GMASK (0x7EULL << CP0SC_PA) +#define CP0SC_AM 4 +#define CP0SC_AM_MASK (0x7ULL << CP0SC_AM) +#define CP0SC_AM_UK 0ULL +#define CP0SC_AM_MK 1ULL +#define CP0SC_AM_MSK 2ULL +#define CP0SC_AM_MUSK 3ULL +#define CP0SC_AM_MUSUK 4ULL +#define CP0SC_AM_USK 5ULL +#define CP0SC_AM_UUSK 7ULL +#define CP0SC_EU 3 +#define CP0SC_EU_MASK (1ULL << CP0SC_EU) +#define CP0SC_C 0 +#define CP0SC_C_MASK (0x7ULL << CP0SC_C) +#define CP0SC_MASK (CP0SC_C_MASK | CP0SC_EU_MASK | CP0SC_AM_MASK | \ + CP0SC_PA_MASK) +#define CP0SC_1GMASK (CP0SC_C_MASK | CP0SC_EU_MASK | CP0SC_AM_MASK | \ + CP0SC_PA_1GMASK) +#define CP0SC0_MASK (CP0SC_MASK | (CP0SC_MASK << 16)) +#define CP0SC1_XAM 59 +#define CP0SC1_XAM_MASK (0x7ULL << CP0SC1_XAM) +#define CP0SC1_MASK (CP0SC_MASK | (CP0SC_MASK << 16) | CP0SC1_XAM_MASK) +#define CP0SC2_XR 56 +#define CP0SC2_XR_MASK (0xFFULL << CP0SC2_XR) +#define CP0SC2_MASK (CP0SC_1GMASK | (CP0SC_1GMASK << 16) | CP0SC2_XR_MASK) int32_t CP0_Wired; int32_t CP0_SRSConf0_rw_bitmask; int32_t CP0_SRSConf0; diff --git a/target/mips/helper.h b/target/mips/helper.h index 60efa01194..5f492348dd 100644 --- a/target/mips/helper.h +++ b/target/mips/helper.h @@ -115,6 +115,9 @@ DEF_HELPER_2(mtc0_entrylo1, void, env, tl) DEF_HELPER_2(mtc0_context, void, env, tl) DEF_HELPER_2(mtc0_pagemask, void, env, tl) DEF_HELPER_2(mtc0_pagegrain, void, env, tl) +DEF_HELPER_2(mtc0_segctl0, void, env, tl) +DEF_HELPER_2(mtc0_segctl1, void, env, tl) +DEF_HELPER_2(mtc0_segctl2, void, env, tl) DEF_HELPER_2(mtc0_wired, void, env, tl) DEF_HELPER_2(mtc0_srsconf0, void, env, tl) DEF_HELPER_2(mtc0_srsconf1, void, env, tl) diff --git a/target/mips/machine.c b/target/mips/machine.c index 91e31a7c2f..898825de3b 100644 --- a/target/mips/machine.c +++ b/target/mips/machine.c @@ -211,8 +211,8 @@ const VMStateDescription vmstate_tlb = { const VMStateDescription vmstate_mips_cpu = { .name = "cpu", - .version_id = 9, - .minimum_version_id = 9, + .version_id = 10, + .minimum_version_id = 10, .post_load = cpu_post_load, .fields = (VMStateField[]) { /* Active TC */ @@ -252,6 +252,9 @@ const VMStateDescription vmstate_mips_cpu = { VMSTATE_UINTTL(env.CP0_Context, MIPSCPU), VMSTATE_INT32(env.CP0_PageMask, MIPSCPU), VMSTATE_INT32(env.CP0_PageGrain, MIPSCPU), + VMSTATE_UINTTL(env.CP0_SegCtl0, MIPSCPU), + VMSTATE_UINTTL(env.CP0_SegCtl1, MIPSCPU), + VMSTATE_UINTTL(env.CP0_SegCtl2, MIPSCPU), VMSTATE_INT32(env.CP0_Wired, MIPSCPU), VMSTATE_INT32(env.CP0_SRSConf0, MIPSCPU), VMSTATE_INT32(env.CP0_SRSConf1, MIPSCPU), diff --git a/target/mips/op_helper.c b/target/mips/op_helper.c index c52a407e86..526f8e4969 100644 --- a/target/mips/op_helper.c +++ b/target/mips/op_helper.c @@ -1322,6 +1322,30 @@ void helper_mtc0_pagegrain(CPUMIPSState *env, target_ulong arg1) restore_pamask(env); } +void helper_mtc0_segctl0(CPUMIPSState *env, target_ulong arg1) +{ + CPUState *cs = CPU(mips_env_get_cpu(env)); + + env->CP0_SegCtl0 = arg1 & CP0SC0_MASK; + tlb_flush(cs); +} + +void helper_mtc0_segctl1(CPUMIPSState *env, target_ulong arg1) +{ + CPUState *cs = CPU(mips_env_get_cpu(env)); + + env->CP0_SegCtl1 = arg1 & CP0SC1_MASK; + tlb_flush(cs); +} + +void helper_mtc0_segctl2(CPUMIPSState *env, target_ulong arg1) +{ + CPUState *cs = CPU(mips_env_get_cpu(env)); + + env->CP0_SegCtl2 = arg1 & CP0SC2_MASK; + tlb_flush(cs); +} + void helper_mtc0_wired(CPUMIPSState *env, target_ulong arg1) { if (env->insn_flags & ISA_MIPS32R6) { diff --git a/target/mips/translate.c b/target/mips/translate.c index 4fb8217953..51626aead3 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -1450,6 +1450,7 @@ typedef struct DisasContext { uint64_t PAMask; bool mvh; bool eva; + bool sc; int CP0_LLAddr_shift; bool ps; bool vp; @@ -5232,6 +5233,24 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_PageGrain)); rn = "PageGrain"; break; + case 2: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl0)); + tcg_gen_ext32s_tl(arg, arg); + rn = "SegCtl0"; + break; + case 3: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl1)); + tcg_gen_ext32s_tl(arg, arg); + rn = "SegCtl1"; + break; + case 4: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl2)); + tcg_gen_ext32s_tl(arg, arg); + rn = "SegCtl2"; + break; default: goto cp0_unimplemented; } @@ -5886,6 +5905,21 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel) rn = "PageGrain"; ctx->bstate = BS_STOP; break; + case 2: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl0(cpu_env, arg); + rn = "SegCtl0"; + break; + case 3: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl1(cpu_env, arg); + rn = "SegCtl1"; + break; + case 4: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl2(cpu_env, arg); + rn = "SegCtl2"; + break; default: goto cp0_unimplemented; } @@ -6547,6 +6581,21 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_PageGrain)); rn = "PageGrain"; break; + case 2: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl0)); + rn = "SegCtl0"; + break; + case 3: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl1)); + rn = "SegCtl1"; + break; + case 4: + CP0_CHECK(ctx->sc); + tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_SegCtl2)); + rn = "SegCtl2"; + break; default: goto cp0_unimplemented; } @@ -7183,6 +7232,21 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_helper_mtc0_pagegrain(cpu_env, arg); rn = "PageGrain"; break; + case 2: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl0(cpu_env, arg); + rn = "SegCtl0"; + break; + case 3: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl1(cpu_env, arg); + rn = "SegCtl1"; + break; + case 4: + CP0_CHECK(ctx->sc); + gen_helper_mtc0_segctl2(cpu_env, arg); + rn = "SegCtl2"; + break; default: goto cp0_unimplemented; } @@ -20142,6 +20206,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb) ctx.PAMask = env->PAMask; ctx.mvh = (env->CP0_Config5 >> CP0C5_MVH) & 1; ctx.eva = (env->CP0_Config5 >> CP0C5_EVA) & 1; + ctx.sc = (env->CP0_Config3 >> CP0C3_SC) & 1; ctx.CP0_LLAddr_shift = env->CP0_LLAddr_shift; ctx.cmgcr = (env->CP0_Config3 >> CP0C3_CMGCR) & 1; /* Restore delay slot state from the tb context. */ @@ -20628,6 +20693,29 @@ void cpu_state_reset(CPUMIPSState *env) env->tcs[0].CP0_TCStatus = (1 << CP0TCSt_A); } } + + /* + * Configure default legacy segmentation control. We use this regardless of + * whether segmentation control is presented to the guest. + */ + /* KSeg3 (seg0 0xE0000000..0xFFFFFFFF) */ + env->CP0_SegCtl0 = (CP0SC_AM_MK << CP0SC_AM); + /* KSeg2 (seg1 0xC0000000..0xDFFFFFFF) */ + env->CP0_SegCtl0 |= ((CP0SC_AM_MSK << CP0SC_AM)) << 16; + /* KSeg1 (seg2 0xA0000000..0x9FFFFFFF) */ + env->CP0_SegCtl1 = (0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | + (2 << CP0SC_C); + /* KSeg0 (seg3 0x80000000..0x9FFFFFFF) */ + env->CP0_SegCtl1 |= ((0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | + (3 << CP0SC_C)) << 16; + /* USeg (seg4 0x40000000..0x7FFFFFFF) */ + env->CP0_SegCtl2 = (2 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | + (1 << CP0SC_EU) | (2 << CP0SC_C); + /* USeg (seg5 0x00000000..0x3FFFFFFF) */ + env->CP0_SegCtl2 |= ((0 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | + (1 << CP0SC_EU) | (2 << CP0SC_C)) << 16; + /* XKPhys (note, SegCtl2.XR = 0, so XAM won't be used) */ + env->CP0_SegCtl1 |= (CP0SC_AM_UK << CP0SC1_XAM); #endif if ((env->insn_flags & ISA_MIPS32R6) && (env->active_fpu.fcr0 & (1 << FCR0_F64))) { -- cgit v1.2.3