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| author | Nicholas Piggin <npiggin@gmail.com> | 2023-06-25 22:20:45 +1000 |
|---|---|---|
| committer | Daniel Henrique Barboza <danielhb413@gmail.com> | 2023-07-07 04:18:26 -0300 |
| commit | a5ff7875a9e50180c354471f931f863a26283ce1 (patch) | |
| tree | 52de6c240005c4324242a88c07c563e3eaef6e09 /hw/ppc | |
| parent | b5ea6754e8f913c82197dc26973d7d7ee4aef91f (diff) | |
| download | qemu-a5ff7875a9e50180c354471f931f863a26283ce1.zip qemu-a5ff7875a9e50180c354471f931f863a26283ce1.tar.gz qemu-a5ff7875a9e50180c354471f931f863a26283ce1.tar.bz2 | |
target/ppc: Make HDECR underflow edge triggered
HDEC interrupts are edge-triggered on HDECR underflow (notably different
from DEC which is level-triggered).
HDEC interrupts already clear the irq on delivery so that does not need
to be changed.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230625122045.15544-1-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'hw/ppc')
| -rw-r--r-- | hw/ppc/ppc.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c index 82e4408..0fc82bb 100644 --- a/hw/ppc/ppc.c +++ b/hw/ppc/ppc.c @@ -788,8 +788,8 @@ static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp, QEMUTimer *timer, void (*raise_excp)(void *), void (*lower_excp)(PowerPCCPU *), - target_ulong decr, target_ulong value, - int nr_bits) + uint32_t flags, target_ulong decr, + target_ulong value, int nr_bits) { CPUPPCState *env = &cpu->env; ppc_tb_t *tb_env = env->tb_env; @@ -819,15 +819,15 @@ static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp, * On MSB edge based DEC implementations the MSB going from 0 -> 1 triggers * an edge interrupt, so raise it here too. */ - if (((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && signed_value < 0) || - ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && signed_value < 0 + if (((flags & PPC_DECR_UNDERFLOW_LEVEL) && signed_value < 0) || + ((flags & PPC_DECR_UNDERFLOW_TRIGGERED) && signed_value < 0 && signed_decr >= 0)) { (*raise_excp)(cpu); return; } /* On MSB level based systems a 0 for the MSB stops interrupt delivery */ - if (signed_value >= 0 && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL)) { + if (signed_value >= 0 && (flags & PPC_DECR_UNDERFLOW_LEVEL)) { (*lower_excp)(cpu); } @@ -846,8 +846,8 @@ static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, target_ulong decr, ppc_tb_t *tb_env = cpu->env.tb_env; __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer, - tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr, - value, nr_bits); + tb_env->decr_timer->cb, &cpu_ppc_decr_lower, + tb_env->flags, decr, value, nr_bits); } void cpu_ppc_store_decr(CPUPPCState *env, target_ulong value) @@ -876,8 +876,10 @@ static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, target_ulong hdecr, ppc_tb_t *tb_env = cpu->env.tb_env; if (tb_env->hdecr_timer != NULL) { + /* HDECR (Book3S 64bit) is edge-based, not level like DECR */ __cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer, tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower, + PPC_DECR_UNDERFLOW_TRIGGERED, hdecr, value, nr_bits); } } |