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Merge remote-tracking branch 'remotes/jovanovic/mips-ufrp' into staging
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* remotes/jovanovic/mips-ufrp:
  target-mips: add user-mode FR switch support for MIPS32r5
  target-mips: add support for CP0_Config5
  target-mips: add support for CP0_Config4
  target-mips: add CPU definition for MIPS32R5

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@pm215
pm215 committed Feb 15, 2014
2 parents 933b19e + 736d120 commit a50f98b
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Showing 6 changed files with 152 additions and 8 deletions.
13 changes: 13 additions & 0 deletions target-mips/cpu.h
View file
Expand Up @@ -73,6 +73,7 @@ struct CPUMIPSFPUContext {
float_status fp_status;
/* fpu implementation/revision register (fir) */
uint32_t fcr0;
#define FCR0_UFRP 28
#define FCR0_F64 22
#define FCR0_L 21
#define FCR0_W 20
Expand Down Expand Up @@ -368,6 +369,18 @@ struct CPUMIPSState {
#define CP0C3_MT 2
#define CP0C3_SM 1
#define CP0C3_TL 0
uint32_t CP0_Config4;
uint32_t CP0_Config4_rw_bitmask;
#define CP0C4_M 31
uint32_t CP0_Config5;
uint32_t CP0_Config5_rw_bitmask;
#define CP0C5_M 31
#define CP0C5_K 30
#define CP0C5_CV 29
#define CP0C5_EVA 28
#define CP0C5_MSAEn 27
#define CP0C5_UFR 2
#define CP0C5_NFExists 0
int32_t CP0_Config6;
int32_t CP0_Config7;
/* XXX: Maybe make LLAddr per-TC? */
Expand Down
4 changes: 3 additions & 1 deletion target-mips/helper.h
View file
Expand Up @@ -134,6 +134,8 @@ DEF_HELPER_2(mtc0_ebase, void, env, tl)
DEF_HELPER_2(mttc0_ebase, void, env, tl)
DEF_HELPER_2(mtc0_config0, void, env, tl)
DEF_HELPER_2(mtc0_config2, void, env, tl)
DEF_HELPER_2(mtc0_config4, void, env, tl)
DEF_HELPER_2(mtc0_config5, void, env, tl)
DEF_HELPER_2(mtc0_lladdr, void, env, tl)
DEF_HELPER_3(mtc0_watchlo, void, env, tl, i32)
DEF_HELPER_3(mtc0_watchhi, void, env, tl, i32)
Expand Down Expand Up @@ -177,7 +179,7 @@ DEF_HELPER_2(yield, tl, env, tl)

/* CP1 functions */
DEF_HELPER_2(cfc1, tl, env, i32)
DEF_HELPER_3(ctc1, void, env, tl, i32)
DEF_HELPER_4(ctc1, void, env, tl, i32, i32)

DEF_HELPER_2(float_cvtd_s, i64, env, i32)
DEF_HELPER_2(float_cvtd_w, i64, env, i32)
Expand Down
8 changes: 8 additions & 0 deletions target-mips/mips-defs.h
View file
Expand Up @@ -29,6 +29,8 @@
#define ISA_MIPS32R2 0x00000040
#define ISA_MIPS64 0x00000080
#define ISA_MIPS64R2 0x00000100
#define ISA_MIPS32R3 0x00000200
#define ISA_MIPS32R5 0x00000400

/* MIPS ASEs. */
#define ASE_MIPS16 0x00001000
Expand Down Expand Up @@ -64,6 +66,12 @@
#define CPU_MIPS32R2 (CPU_MIPS32 | ISA_MIPS32R2)
#define CPU_MIPS64R2 (CPU_MIPS64 | CPU_MIPS32R2 | ISA_MIPS64R2)

/* MIPS Technologies "Release 3" */
#define CPU_MIPS32R3 (CPU_MIPS32R2 | ISA_MIPS32R3)

/* MIPS Technologies "Release 5" */
#define CPU_MIPS32R5 (CPU_MIPS32R3 | ISA_MIPS32R5)

/* Strictly follow the architecture standard:
- Disallow "special" instruction handling for PMON/SPIM.
Note that we still maintain Count/Compare to match the host clock. */
Expand Down
53 changes: 50 additions & 3 deletions target-mips/op_helper.c
View file
Expand Up @@ -1489,6 +1489,18 @@ void helper_mtc0_config2(CPUMIPSState *env, target_ulong arg1)
env->CP0_Config2 = (env->CP0_Config2 & 0x8FFF0FFF);
}

void helper_mtc0_config4(CPUMIPSState *env, target_ulong arg1)
{
env->CP0_Config4 = (env->CP0_Config4 & (~env->CP0_Config4_rw_bitmask)) |
(arg1 & env->CP0_Config4_rw_bitmask);
}

void helper_mtc0_config5(CPUMIPSState *env, target_ulong arg1)
{
env->CP0_Config5 = (env->CP0_Config5 & (~env->CP0_Config5_rw_bitmask)) |
(arg1 & env->CP0_Config5_rw_bitmask);
}

void helper_mtc0_lladdr(CPUMIPSState *env, target_ulong arg1)
{
target_long mask = env->CP0_LLAddr_rw_bitmask;
Expand Down Expand Up @@ -2187,12 +2199,23 @@ static inline void restore_flush_mode(CPUMIPSState *env)

target_ulong helper_cfc1(CPUMIPSState *env, uint32_t reg)
{
target_ulong arg1;
target_ulong arg1 = 0;

switch (reg) {
case 0:
arg1 = (int32_t)env->active_fpu.fcr0;
break;
case 1:
/* UFR Support - Read Status FR */
if (env->active_fpu.fcr0 & (1 << FCR0_UFRP)) {
if (env->CP0_Config5 & (1 << CP0C5_UFR)) {
arg1 = (int32_t)
((env->CP0_Status & (1 << CP0St_FR)) >> CP0St_FR);
} else {
helper_raise_exception(env, EXCP_RI);
}
}
break;
case 25:
arg1 = ((env->active_fpu.fcr31 >> 24) & 0xfe) | ((env->active_fpu.fcr31 >> 23) & 0x1);
break;
Expand All @@ -2210,9 +2233,33 @@ target_ulong helper_cfc1(CPUMIPSState *env, uint32_t reg)
return arg1;
}

void helper_ctc1(CPUMIPSState *env, target_ulong arg1, uint32_t reg)
void helper_ctc1(CPUMIPSState *env, target_ulong arg1, uint32_t fs, uint32_t rt)
{
switch(reg) {
switch (fs) {
case 1:
/* UFR Alias - Reset Status FR */
if (!((env->active_fpu.fcr0 & (1 << FCR0_UFRP)) && (rt == 0))) {
return;
}
if (env->CP0_Config5 & (1 << CP0C5_UFR)) {
env->CP0_Status &= ~(1 << CP0St_FR);
compute_hflags(env);
} else {
helper_raise_exception(env, EXCP_RI);
}
break;
case 4:
/* UNFR Alias - Set Status FR */
if (!((env->active_fpu.fcr0 & (1 << FCR0_UFRP)) && (rt == 0))) {
return;
}
if (env->CP0_Config5 & (1 << CP0C5_UFR)) {
env->CP0_Status |= (1 << CP0St_FR);
compute_hflags(env);
} else {
helper_raise_exception(env, EXCP_RI);
}
break;
case 25:
if (arg1 & 0xffffff00)
return;
Expand Down
39 changes: 35 additions & 4 deletions target-mips/translate.c
View file
Expand Up @@ -4405,7 +4405,14 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_Config3));
rn = "Config3";
break;
/* 4,5 are reserved */
case 4:
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_Config4));
rn = "Config4";
break;
case 5:
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_Config5));
rn = "Config5";
break;
/* 6,7 are implementation dependent */
case 6:
gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_Config6));
Expand Down Expand Up @@ -4982,7 +4989,17 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
/* ignored, read only */
rn = "Config3";
break;
/* 4,5 are reserved */
case 4:
gen_helper_mtc0_config4(cpu_env, arg);
rn = "Config4";
ctx->bstate = BS_STOP;
break;
case 5:
gen_helper_mtc0_config5(cpu_env, arg);
rn = "Config5";
/* Stop translation as we may have switched the execution mode */
ctx->bstate = BS_STOP;
break;
/* 6,7 are implementation dependent */
case 6:
/* ignored */
Expand Down Expand Up @@ -6801,7 +6818,12 @@ static void gen_mttr(CPUMIPSState *env, DisasContext *ctx, int rd, int rt,
break;
case 3:
/* XXX: For now we support only a single FPU context. */
gen_helper_0e1i(ctc1, t0, rd);
{
TCGv_i32 fs_tmp = tcg_const_i32(rd);

gen_helper_0e2i(ctc1, t0, fs_tmp, rt);
tcg_temp_free_i32(fs_tmp);
}
break;
/* COP2: Not implemented. */
case 4:
Expand Down Expand Up @@ -7237,7 +7259,12 @@ static void gen_cp1 (DisasContext *ctx, uint32_t opc, int rt, int fs)
break;
case OPC_CTC1:
gen_load_gpr(t0, rt);
gen_helper_0e1i(ctc1, t0, fs);
{
TCGv_i32 fs_tmp = tcg_const_i32(fs);

gen_helper_0e2i(ctc1, t0, fs_tmp, rt);
tcg_temp_free_i32(fs_tmp);
}
opn = "ctc1";
break;
#if defined(TARGET_MIPS64)
Expand Down Expand Up @@ -15916,6 +15943,10 @@ void cpu_state_reset(CPUMIPSState *env)
env->CP0_Config1 = env->cpu_model->CP0_Config1;
env->CP0_Config2 = env->cpu_model->CP0_Config2;
env->CP0_Config3 = env->cpu_model->CP0_Config3;
env->CP0_Config4 = env->cpu_model->CP0_Config4;
env->CP0_Config4_rw_bitmask = env->cpu_model->CP0_Config4_rw_bitmask;
env->CP0_Config5 = env->cpu_model->CP0_Config5;
env->CP0_Config5_rw_bitmask = env->cpu_model->CP0_Config5_rw_bitmask;
env->CP0_Config6 = env->cpu_model->CP0_Config6;
env->CP0_Config7 = env->cpu_model->CP0_Config7;
env->CP0_LLAddr_rw_bitmask = env->cpu_model->CP0_LLAddr_rw_bitmask
Expand Down
43 changes: 43 additions & 0 deletions target-mips/translate_init.c
View file
Expand Up @@ -45,6 +45,12 @@
(0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \
(0 << CP0C3_SM) | (0 << CP0C3_TL))

#define MIPS_CONFIG4 \
((0 << CP0C4_M))

#define MIPS_CONFIG5 \
((0 << CP0C5_M))

/* MMU types, the first four entries have the same layout as the
CP0C0_MT field. */
enum mips_mmu_types {
Expand All @@ -64,6 +70,10 @@ struct mips_def_t {
int32_t CP0_Config1;
int32_t CP0_Config2;
int32_t CP0_Config3;
int32_t CP0_Config4;
int32_t CP0_Config4_rw_bitmask;
int32_t CP0_Config5;
int32_t CP0_Config5_rw_bitmask;
int32_t CP0_Config6;
int32_t CP0_Config7;
target_ulong CP0_LLAddr_rw_bitmask;
Expand Down Expand Up @@ -333,6 +343,39 @@ static const mips_def_t mips_defs[] =
.insn_flags = CPU_MIPS32R2 | ASE_MIPS16 | ASE_DSP | ASE_DSPR2,
.mmu_type = MMU_TYPE_R4000,
},
{
/* A generic CPU providing MIPS32 Release 5 features.
FIXME: Eventually this should be replaced by a real CPU model. */
.name = "mips32r5-generic",
.CP0_PRid = 0x00019700,
.CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) |
(MMU_TYPE_R4000 << CP0C0_MT),
.CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (15 << CP0C1_MMU) |
(0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) |
(0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA) |
(1 << CP0C1_CA),
.CP0_Config2 = MIPS_CONFIG2,
.CP0_Config3 = MIPS_CONFIG3 | (1 << CP0C3_M),
.CP0_Config4 = MIPS_CONFIG4 | (1 << CP0C4_M),
.CP0_Config4_rw_bitmask = 0,
.CP0_Config5 = MIPS_CONFIG5 | (1 << CP0C5_UFR),
.CP0_Config5_rw_bitmask = (0 << CP0C5_M) | (1 << CP0C5_K) |
(1 << CP0C5_CV) | (0 << CP0C5_EVA) |
(1 << CP0C5_MSAEn) | (1 << CP0C5_UFR) |
(0 << CP0C5_NFExists),
.CP0_LLAddr_rw_bitmask = 0,
.CP0_LLAddr_shift = 4,
.SYNCI_Step = 32,
.CCRes = 2,
.CP0_Status_rw_bitmask = 0x3778FF1F,
.CP1_fcr0 = (1 << FCR0_UFRP) | (1 << FCR0_F64) | (1 << FCR0_L) |
(1 << FCR0_W) | (1 << FCR0_D) | (1 << FCR0_S) |
(0x93 << FCR0_PRID),
.SEGBITS = 32,
.PABITS = 32,
.insn_flags = CPU_MIPS32R5 | ASE_MIPS16 | ASE_DSP | ASE_DSPR2,
.mmu_type = MMU_TYPE_R4000,
},
#if defined(TARGET_MIPS64)
{
.name = "R4000",
Expand Down

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