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ppc: Initial HDEC support

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The current behaviour isn't completely right, as for the DEC, we
don't properly re-arm when wrapping around, but I will fix this
in a separate patch.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: fixed checkpatch.pl errors ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2016-06-27 08:55:19 +02:00 • committed by David Gibson
parent b378bb0948
commit 4b236b621b
5 changed files with 66 additions and 15 deletions
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17
hw/ppc/ppc.c
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@ -699,9 +699,18 @@ static inline void cpu_ppc_decr_lower(PowerPCCPU *cpu)
static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu)
{
CPUPPCState *env = &cpu->env;
/* Raise it */
LOG_TB("raise decrementer exception\n");
ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
LOG_TB("raise hv decrementer exception\n");
/* The architecture specifies that we don't deliver HDEC
* interrupts in a PM state. Not only they don't cause a
* wakeup but they also get effectively discarded.
*/
if (!env->in_pm_state) {
ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
}
}
static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu)
@ -928,9 +937,7 @@ clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq)
}
/* Create new timer */
tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu);
if (0) {
/* XXX: find a suitable condition to enable the hypervisor decrementer
*/
if (env->has_hv_mode) {
tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb,
cpu);
} else {