Release 6 Virtual Processor based Multi-threading support. This patch is based on VPE implementation of MT-ASE.
References: MIPS Architecture Reference Manual Volume II-A: The MIPS32 Instruction Set, Revision 6.02 MIPS Architecture Reference Manual Volume III: The MIPS32 and microMIPS32 Privileged Resource Architecture, Revision 6.01 Signed-off-by: Yongbok Kim <[email protected]> --- disas/mips.c | 4 +++ target-mips/cpu.c | 9 ++++++ target-mips/cpu.h | 25 +++++++++++++++++ target-mips/helper.h | 4 +++ target-mips/op_helper.c | 49 ++++++++++++++++++++++++++++++++++ target-mips/translate.c | 59 ++++++++++++++++++++++++++++++++++++++++++ target-mips/translate_init.c | 1 + 7 files changed, 151 insertions(+), 0 deletions(-) diff --git a/disas/mips.c b/disas/mips.c index 1afe0c5..6b4b894 100644 --- a/disas/mips.c +++ b/disas/mips.c @@ -1404,6 +1404,10 @@ const struct mips_opcode mips_builtin_opcodes[] = {"cmp.sor.d", "D,S,T", 0x46a00019, 0xffe0003f, RD_S|RD_T|WR_D|FP_D, 0, I32R6}, {"cmp.sune.d", "D,S,T", 0x46a0001a, 0xffe0003f, RD_S|RD_T|WR_D|FP_D, 0, I32R6}, {"cmp.sne.d", "D,S,T", 0x46a0001b, 0xffe0003f, RD_S|RD_T|WR_D|FP_D, 0, I32R6}, +{"dvp", "", 0x41600024, 0xffffffff, TRAP, 0, I32R6}, +{"dvp", "t", 0x41600024, 0xffe0ffff, TRAP|WR_t, 0, I32R6}, +{"evp", "", 0x41600004, 0xffffffff, TRAP, 0, I32R6}, +{"evp", "t", 0x41600004, 0xffe0ffff, TRAP|WR_t, 0, I32R6}, /* MSA */ {"sll.b", "+d,+e,+f", 0x7800000d, 0xffe0003f, WR_VD|RD_VS|RD_VT, 0, MSA}, diff --git a/target-mips/cpu.c b/target-mips/cpu.c index 958c999..34fbd7c 100644 --- a/target-mips/cpu.c +++ b/target-mips/cpu.c @@ -73,6 +73,15 @@ static bool mips_cpu_has_work(CPUState *cs) has_work = false; } } + /* MIPS Release 6 has the ability to halt the CPU. */ + if (env->CP0_Config5 & (1 << CP0C5_VP)) { + if (cs->interrupt_request & CPU_INTERRUPT_WAKE) { + has_work = true; + } + if (!mips_vp_active(env)) { + has_work = false; + } + } return has_work; } diff --git a/target-mips/cpu.h b/target-mips/cpu.h index f9d2b4c..d1afd6f 100644 --- a/target-mips/cpu.h +++ b/target-mips/cpu.h @@ -232,6 +232,8 @@ struct CPUMIPSState { int32_t CP0_Index; /* CP0_MVP* are per MVP registers. */ + int32_t CP0_VPControl; +#define CP0VPCtl_DIS 0 int32_t CP0_Random; int32_t CP0_VPEControl; #define CP0VPECo_YSI 21 @@ -281,6 +283,8 @@ struct CPUMIPSState { # define CP0EnLo_RI 31 # define CP0EnLo_XI 30 #endif + int32_t CP0_GlobalNumer; +#define CP0GN_VPId 0 target_ulong CP0_Context; target_ulong CP0_KScratch[MIPS_KSCRATCH_NUM]; int32_t CP0_PageMask; @@ -462,6 +466,7 @@ struct CPUMIPSState { #define CP0C5_CV 29 #define CP0C5_EVA 28 #define CP0C5_MSAEn 27 +#define CP0C5_VP 7 #define CP0C5_SBRI 6 #define CP0C5_UFR 2 #define CP0C5_NFExists 0 @@ -836,6 +841,26 @@ static inline int mips_vpe_active(CPUMIPSState *env) return active; } +static inline int mips_vp_active(CPUMIPSState *env) +{ + CPUState *other_cs = first_cpu; + + /* Check if the VP disabled other VPs (which means the VP is enabled) */ + if ((env->CP0_VPControl >> CP0VPCtl_DIS) &1) { + return 1; + } + + /* Check if the virtual processor is disabled due to a DVP */ + CPU_FOREACH(other_cs) { + MIPSCPU *other_cpu = MIPS_CPU(other_cs); + if ((&other_cpu->env != env) && + ((other_cpu->env.CP0_VPControl >> CP0VPCtl_DIS) &1)) { + return 0; + } + } + return 1; +} + #include "exec/exec-all.h" static inline void compute_hflags(CPUMIPSState *env) diff --git a/target-mips/helper.h b/target-mips/helper.h index bdd5ba5..f1f7d3a 100644 --- a/target-mips/helper.h +++ b/target-mips/helper.h @@ -173,6 +173,10 @@ DEF_HELPER_0(dmt, tl) DEF_HELPER_0(emt, tl) DEF_HELPER_1(dvpe, tl, env) DEF_HELPER_1(evpe, tl, env) + +/* R6 Multi-threading */ +DEF_HELPER_1(dvp, tl, env) +DEF_HELPER_1(evp, tl, env) #endif /* !CONFIG_USER_ONLY */ /* microMIPS functions */ diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c index a404b4f..34bdb2d 100644 --- a/target-mips/op_helper.c +++ b/target-mips/op_helper.c @@ -547,6 +547,14 @@ static bool mips_vpe_is_wfi(MIPSCPU *c) return cpu->halted && mips_vpe_active(env); } +static bool mips_vp_is_wfi(MIPSCPU *c) +{ + CPUState *cpu = CPU(c); + CPUMIPSState *env = &c->env; + + return cpu->halted && mips_vp_active(env); +} + static inline void mips_vpe_wake(MIPSCPU *c) { /* Dont set ->halted = 0 directly, let it be done via cpu_has_work @@ -1806,6 +1814,47 @@ target_ulong helper_yield(CPUMIPSState *env, target_ulong arg) return env->CP0_YQMask; } +/* R6 Multi-threading */ +#ifndef CONFIG_USER_ONLY +target_ulong helper_dvp(CPUMIPSState *env) +{ + CPUState *other_cs = first_cpu; + target_ulong prev = env->CP0_VPControl; + + if (!((env->CP0_VPControl >> CP0VPCtl_DIS) &1)) { + CPU_FOREACH(other_cs) { + MIPSCPU *other_cpu = MIPS_CPU(other_cs); + /* Turn off all VPs except the one executing the dvp. */ + if (&other_cpu->env != env) { + mips_vpe_sleep(other_cpu); + } + } + env->CP0_VPControl |= (1 << CP0VPCtl_DIS); + } + return prev; +} + +target_ulong helper_evp(CPUMIPSState *env) +{ + CPUState *other_cs = first_cpu; + target_ulong prev = env->CP0_VPControl; + + if (((env->CP0_VPControl >> CP0VPCtl_DIS) &1)) { + CPU_FOREACH(other_cs) { + MIPSCPU *other_cpu = MIPS_CPU(other_cs); + if (&other_cpu->env != env + && !mips_vp_is_wfi(other_cpu)) { + /* If the VP is WFI, don't disturb its sleep. + * Otherwise, wake it up. */ + mips_vpe_wake(other_cpu); + } + } + env->CP0_VPControl &= ~(1 << CP0VPCtl_DIS); + } + return prev; +} +#endif /* !CONFIG_USER_ONLY */ + #ifndef CONFIG_USER_ONLY /* TLB management */ static void cpu_mips_tlb_flush (CPUMIPSState *env, int flush_global) diff --git a/target-mips/translate.c b/target-mips/translate.c index 4cef739..a788827 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -890,6 +890,8 @@ enum { OPC_EVPE = 0x01 | (1 << 5) | OPC_MFMC0, OPC_DI = (0 << 5) | (0x0C << 11) | OPC_MFMC0, OPC_EI = (1 << 5) | (0x0C << 11) | OPC_MFMC0, + OPC_DVP = 0x04 | (0 << 3) | (1 << 5) | (0 << 11) | OPC_MFMC0, + OPC_EVP = 0x04 | (0 << 3) | (0 << 5) | (0 << 11) | OPC_MFMC0, }; /* Coprocessor 0 (with rs == C0) */ @@ -1424,6 +1426,7 @@ typedef struct DisasContext { int ie; bool bi; bool bp; + bool vp; } DisasContext; enum { @@ -4903,6 +4906,11 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_helper_mfc0_mvpconf1(arg, cpu_env); rn = "MVPConf1"; break; + case 4: + CP0_CHECK(ctx->vp); + gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPControl)); + rn = "VPControl"; + break; default: goto cp0_unimplemented; } @@ -5024,6 +5032,11 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel) tcg_gen_ext32s_tl(arg, arg); rn = "EntryLo1"; break; + case 1: + CP0_CHECK(ctx->vp); + gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_GlobalNumer)); + rn = "GlobalNumber"; + break; default: goto cp0_unimplemented; } @@ -5539,6 +5552,11 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel) /* ignored */ rn = "MVPConf1"; break; + case 4: + CP0_CHECK(ctx->vp); + /* ignored */ + rn = "VPControl"; + break; default: goto cp0_unimplemented; } @@ -5639,6 +5657,11 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_helper_mtc0_entrylo1(cpu_env, arg); rn = "EntryLo1"; break; + case 1: + CP0_CHECK(ctx->vp); + /* ignored */ + rn = "GlobalNumber"; + break; default: goto cp0_unimplemented; } @@ -6173,6 +6196,11 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_helper_mfc0_mvpconf1(arg, cpu_env); rn = "MVPConf1"; break; + case 4: + CP0_CHECK(ctx->vp); + gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPControl)); + rn = "VPControl"; + break; default: goto cp0_unimplemented; } @@ -6274,6 +6302,11 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel) tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_EntryLo1)); rn = "EntryLo1"; break; + case 1: + CP0_CHECK(ctx->vp); + gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_GlobalNumer)); + rn = "GlobalNumber"; + break; default: goto cp0_unimplemented; } @@ -6780,6 +6813,11 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel) /* ignored */ rn = "MVPConf1"; break; + case 4: + CP0_CHECK(ctx->vp); + /* ignored */ + rn = "VPControl"; + break; default: goto cp0_unimplemented; } @@ -6880,6 +6918,11 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel) gen_helper_dmtc0_entrylo1(cpu_env, arg); rn = "EntryLo1"; break; + case 1: + CP0_CHECK(ctx->vp); + /* ignored */ + rn = "GlobalNumber"; + break; default: goto cp0_unimplemented; } @@ -18625,6 +18668,20 @@ static void decode_opc(CPUMIPSState *env, DisasContext *ctx) gen_helper_evpe(t0, cpu_env); gen_store_gpr(t0, rt); break; + case OPC_DVP: + check_insn(ctx, ISA_MIPS32R6); + if (ctx->vp) { + gen_helper_dvp(t0, cpu_env); + gen_store_gpr(t0, rt); + } + break; + case OPC_EVP: + check_insn(ctx, ISA_MIPS32R6); + if (ctx->vp) { + gen_helper_evp(t0, cpu_env); + gen_store_gpr(t0, rt); + } + break; case OPC_DI: check_insn(ctx, ISA_MIPS32R2); save_cpu_state(ctx, 1); @@ -19157,6 +19214,7 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb, /* Restore delay slot state from the tb context. */ ctx.hflags = (uint32_t)tb->flags; /* FIXME: maybe use 64 bits here? */ ctx.ulri = (env->CP0_Config3 >> CP0C3_ULRI) & 1; + ctx.vp = (env->CP0_Config5 >> CP0C5_VP) & 1; restore_cpu_state(env, &ctx); #ifdef CONFIG_USER_ONLY ctx.mem_idx = MIPS_HFLAG_UM; @@ -19597,6 +19655,7 @@ void cpu_state_reset(CPUMIPSState *env) env->CP0_Random = env->tlb->nb_tlb - 1; env->tlb->tlb_in_use = env->tlb->nb_tlb; env->CP0_Wired = 0; + env->CP0_GlobalNumer = (cs->cpu_index & 0xFF) << CP0GN_VPId; env->CP0_EBase = (cs->cpu_index & 0x3FF); if (kvm_enabled()) { env->CP0_EBase |= 0x40000000; diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c index ec54fef..06c6a31 100644 --- a/target-mips/translate_init.c +++ b/target-mips/translate_init.c @@ -622,6 +622,7 @@ static const mips_def_t mips_defs[] = (1 << CP0C3_BI) | (1 << CP0C3_ULRI) | (1U << CP0C3_M), .CP0_Config4 = MIPS_CONFIG4 | (0xfc << CP0C4_KScrExist) | (3 << CP0C4_IE) | (1 << CP0C4_M), + .CP0_Config5 = MIPS_CONFIG5 | (1 << CP0C5_VP), .CP0_Config5_rw_bitmask = (1 << CP0C5_SBRI), .CP0_LLAddr_rw_bitmask = 0, .CP0_LLAddr_shift = 0, -- 1.7.5.4
