On Mon, Mar 15, 2021 at 12:46:00PM -0600, Richard Henderson wrote: > Keep all hflags computation in one place, as this will be > especially important later. > > Introduce a new POWERPC_FLAG_HID0_LE bit to indicate when > LE should be taken from HID0. This appears to be set if > and only if POWERPC_FLAG_RTC_CLK is set, but we're not > short of bits and having both names will avoid confusion. > > Note that this was the only user of hflags_nmsr, so we can > perform a straight assignment rather than mask and set. > > Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
Applied to ppc-for-6.0, thanks. > --- > target/ppc/cpu.h | 2 ++ > target/ppc/helper_regs.c | 13 +++++++++++-- > target/ppc/misc_helper.c | 8 +++----- > target/ppc/translate_init.c.inc | 4 ++-- > 4 files changed, 18 insertions(+), 9 deletions(-) > > diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h > index e73416da68..061d2eed1b 100644 > --- a/target/ppc/cpu.h > +++ b/target/ppc/cpu.h > @@ -581,6 +581,8 @@ enum { > POWERPC_FLAG_TM = 0x00100000, > /* Has SCV (ISA 3.00) > */ > POWERPC_FLAG_SCV = 0x00200000, > + /* Has HID0 for LE bit (601) > */ > + POWERPC_FLAG_HID0_LE = 0x00400000, > }; > > > /*****************************************************************************/ > diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c > index 5e18232b84..95b9aca61f 100644 > --- a/target/ppc/helper_regs.c > +++ b/target/ppc/helper_regs.c > @@ -96,8 +96,17 @@ void hreg_compute_hflags(CPUPPCState *env) > hflags_mask |= (1ULL << MSR_CM) | (1ULL << MSR_SF) | MSR_HVB; > hreg_compute_mem_idx(env); > env->hflags = env->msr & hflags_mask; > - /* Merge with hflags coming from other registers */ > - env->hflags |= env->hflags_nmsr; > + > + if (env->flags & POWERPC_FLAG_HID0_LE) { > + /* > + * Note that MSR_LE is not set in env->msr_mask for this cpu, > + * and so will never be set in msr or hflags at this point. > + */ > + uint32_t le = extract32(env->spr[SPR_HID0], 3, 1); > + env->hflags |= le << MSR_LE; > + /* Retain for backward compatibility with migration. */ > + env->hflags_nmsr = le << MSR_LE; > + } > } > > void cpu_interrupt_exittb(CPUState *cs) > diff --git a/target/ppc/misc_helper.c b/target/ppc/misc_helper.c > index 5d6e0de396..63e3147eb4 100644 > --- a/target/ppc/misc_helper.c > +++ b/target/ppc/misc_helper.c > @@ -194,16 +194,14 @@ void helper_store_hid0_601(CPUPPCState *env, > target_ulong val) > target_ulong hid0; > > hid0 = env->spr[SPR_HID0]; > + env->spr[SPR_HID0] = (uint32_t)val; > + > if ((val ^ hid0) & 0x00000008) { > /* Change current endianness */ > - env->hflags &= ~(1 << MSR_LE); > - env->hflags_nmsr &= ~(1 << MSR_LE); > - env->hflags_nmsr |= (1 << MSR_LE) & (((val >> 3) & 1) << MSR_LE); > - env->hflags |= env->hflags_nmsr; > + hreg_compute_hflags(env); > qemu_log("%s: set endianness to %c => " TARGET_FMT_lx "\n", __func__, > val & 0x8 ? 'l' : 'b', env->hflags); > } > - env->spr[SPR_HID0] = (uint32_t)val; > } > > void helper_store_403_pbr(CPUPPCState *env, uint32_t num, target_ulong value) > diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc > index c03a7c4f52..049d76cfd1 100644 > --- a/target/ppc/translate_init.c.inc > +++ b/target/ppc/translate_init.c.inc > @@ -5441,7 +5441,7 @@ POWERPC_FAMILY(601)(ObjectClass *oc, void *data) > pcc->excp_model = POWERPC_EXCP_601; > pcc->bus_model = PPC_FLAGS_INPUT_6xx; > pcc->bfd_mach = bfd_mach_ppc_601; > - pcc->flags = POWERPC_FLAG_SE | POWERPC_FLAG_RTC_CLK; > + pcc->flags = POWERPC_FLAG_SE | POWERPC_FLAG_RTC_CLK | > POWERPC_FLAG_HID0_LE; > } > > #define POWERPC_MSRR_601v (0x0000000000001040ULL) > @@ -5485,7 +5485,7 @@ POWERPC_FAMILY(601v)(ObjectClass *oc, void *data) > #endif > pcc->bus_model = PPC_FLAGS_INPUT_6xx; > pcc->bfd_mach = bfd_mach_ppc_601; > - pcc->flags = POWERPC_FLAG_SE | POWERPC_FLAG_RTC_CLK; > + pcc->flags = POWERPC_FLAG_SE | POWERPC_FLAG_RTC_CLK | > POWERPC_FLAG_HID0_LE; > } > > static void init_proc_602(CPUPPCState *env) -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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