diff options
Diffstat (limited to 'hw/ppc.c')
| -rw-r--r-- | hw/ppc.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/hw/ppc.c b/hw/ppc.c index 9a01c01748..b534e39562 100644 --- a/hw/ppc.c +++ b/hw/ppc.c @@ -314,6 +314,66 @@ void ppc40x_irq_init (CPUState *env) env, PPC40x_INPUT_NB); } +/* PowerPC E500 internal IRQ controller */ +static void ppce500_set_irq (void *opaque, int pin, int level) +{ + CPUState *env = opaque; + int cur_level; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { + switch (pin) { + case PPCE500_INPUT_MCK: + if (level) { + LOG_IRQ("%s: reset the PowerPC system\n", + __func__); + qemu_system_reset_request(); + } + break; + case PPCE500_INPUT_RESET_CORE: + if (level) { + LOG_IRQ("%s: reset the PowerPC core\n", __func__); + ppc_set_irq(env, PPC_INTERRUPT_MCK, level); + } + break; + case PPCE500_INPUT_CINT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the critical IRQ state to %d\n", + __func__, level); + ppc_set_irq(env, PPC_INTERRUPT_CEXT, level); + break; + case PPCE500_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the core IRQ state to %d\n", + __func__, level); + ppc_set_irq(env, PPC_INTERRUPT_EXT, level); + break; + case PPCE500_INPUT_DEBUG: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the debug pin state to %d\n", + __func__, level); + ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level); + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); + } +} + +void ppce500_irq_init (CPUState *env) +{ + env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq, + env, PPCE500_INPUT_NB); +} /*****************************************************************************/ /* PowerPC time base and decrementer emulation */ struct ppc_tb_t { |