diff options
| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-06-01 21:57:32 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-06-01 21:57:32 +0000 |
| commit | 1e3d0552f561429ed8236f71857f28c1903e5774 (patch) | |
| tree | 44db3a30f46a62c9c06856fba9204d4d96d72835 /target-mips | |
| parent | 8487327a1dabd9ce8899d0e1af151b334980c575 (diff) | |
Update some comments, 64bit FPU support is functional regardless of
funny non-standard fcr0 bits on earlier CPUs.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2919 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/TODO | 2 | ||||
| -rw-r--r-- | target-mips/translate_init.c | 11 |
2 files changed, 8 insertions, 5 deletions
diff --git a/target-mips/TODO b/target-mips/TODO index 988a902627..2ff95df99d 100644 --- a/target-mips/TODO +++ b/target-mips/TODO @@ -16,7 +16,7 @@ General MIPS64 ------ -- 64bit FPU enable flag not handled correctly +- Only lighly tested but apparently functional as of 2007-05-31. "Generic" 4Kc system emulation ------------------------------ diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c index d793c9a70c..bbfa63b309 100644 --- a/target-mips/translate_init.c +++ b/target-mips/translate_init.c @@ -146,7 +146,7 @@ static mips_def_t mips_defs[] = .SYNCI_Step = 16, .CCRes = 2, .Status_rw_bitmask = 0x3678FFFF, - /* XXX: The R4000 has a full 64bit FPU doesn't use the fcr0 bits. */ + /* The R4000 has a full 64bit FPU doesn't use the fcr0 bits. */ .CP1_fcr0 = (0x5 << FCR0_PRID) | (0x0 << FCR0_REV), }, { @@ -176,7 +176,7 @@ static mips_def_t mips_defs[] = .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3678FFFF, - /* XXX: The 5Kf has F64 / L / W but doesn't use the fcr0 bits. */ + /* The 5Kf has F64 / L / W but doesn't use the fcr0 bits. */ .CP1_fcr0 = (1 << FCR0_D) | (1 << FCR0_S) | (0x81 << FCR0_PRID) | (0x0 << FCR0_REV), }, @@ -193,7 +193,7 @@ static mips_def_t mips_defs[] = .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x36FBFFFF, - /* XXX: The 20Kc has F64 / L / W but doesn't use the fcr0 bits. */ + /* The 20Kc has F64 / L / W but doesn't use the fcr0 bits. */ .CP1_fcr0 = (1 << FCR0_3D) | (1 << FCR0_PS) | (1 << FCR0_D) | (1 << FCR0_S) | (0x82 << FCR0_PRID) | (0x0 << FCR0_REV), @@ -279,6 +279,10 @@ int cpu_mips_register (CPUMIPSState *env, mips_def_t *def) if (env->fcr0 & (1 << FCR0_F64)) env->hflags |= MIPS_HFLAG_F64; #else + /* There are more full-featured MMU variants in older MIPS CPUs, + R3000, R6000 and R8000 come to mind. If we ever support them, + this check will need to look up a different place than those + newfangled config registers. */ switch ((env->CP0_Config0 >> CP0C0_MT) & 3) { case 0: no_mmu_init(env, def); @@ -290,7 +294,6 @@ int cpu_mips_register (CPUMIPSState *env, mips_def_t *def) fixed_mmu_init(env, def); break; default: - /* Older CPUs like the R3000 may need nonstandard handling here. */ cpu_abort(env, "MMU type not supported\n"); } env->CP0_Random = env->nb_tlb - 1; |