diff options
Diffstat (limited to 'hw/ppc.c')
| -rw-r--r-- | hw/ppc.c | 126 |
1 files changed, 88 insertions, 38 deletions
@@ -1,5 +1,5 @@ /* - * QEMU generic PPC hardware System Emulator + * QEMU generic PowerPC hardware System Emulator * * Copyright (c) 2003-2007 Jocelyn Mayer * @@ -24,18 +24,13 @@ #include "vl.h" #include "m48t59.h" +//#define PPC_DEBUG_IRQ + extern FILE *logfile; extern int loglevel; -/*****************************************************************************/ -/* PowerPC internal fake IRQ controller - * used to manage multiple sources hardware events - */ -static void ppc_set_irq (void *opaque, int n_IRQ, int level) +void ppc_set_irq (CPUState *env, int n_IRQ, int level) { - CPUState *env; - - env = opaque; if (level) { env->pending_interrupts |= 1 << n_IRQ; cpu_interrupt(env, CPU_INTERRUPT_HARD); @@ -44,49 +39,104 @@ static void ppc_set_irq (void *opaque, int n_IRQ, int level) if (env->pending_interrupts == 0) cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); } -#if 0 +#if defined(PPC_DEBUG_IRQ) printf("%s: %p n_IRQ %d level %d => pending %08x req %08x\n", __func__, env, n_IRQ, level, env->pending_interrupts, env->interrupt_request); #endif } -void cpu_ppc_irq_init_cpu(CPUState *env) +/* PowerPC 6xx / 7xx internal IRQ controller */ +static void ppc6xx_set_irq (void *opaque, int pin, int level) { - qemu_irq *qi; - int i; + CPUState *env = opaque; + int cur_level; - qi = qemu_allocate_irqs(ppc_set_irq, env, 32); - for (i = 0; i < 32; i++) { - env->irq[i] = qi[i]; +#if defined(PPC_DEBUG_IRQ) + printf("%s: env %p pin %d level %d\n", __func__, env, pin, level); +#endif + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0) || 0) { + switch (pin) { + case PPC_INPUT_INT: + /* Level sensitive - asserted high */ +#if defined(PPC_DEBUG_IRQ) + printf("%s: set the external IRQ state to %d\n", __func__, level); +#endif + ppc_set_irq(env, PPC_INTERRUPT_EXT, level); + break; + case PPC_INPUT_SMI: + /* Level sensitive - active high */ +#if defined(PPC_DEBUG_IRQ) + printf("%s: set the SMI IRQ state to %d\n", __func__, level); +#endif + ppc_set_irq(env, PPC_INTERRUPT_SMI, level); + break; + case PPC_INPUT_MCP: + /* Negative edge sensitive */ + /* XXX: TODO: actual reaction may depends on HID0 status + * 603/604/740/750: check HID0[EMCP] + */ + if (cur_level == 1 && level == 0) { +#if defined(PPC_DEBUG_IRQ) + printf("%s: raise machine check state\n", __func__); +#endif + ppc_set_irq(env, PPC_INTERRUPT_MCK, 1); + } + break; + case PPC_INPUT_CKSTP_IN: + /* Level sensitive - active low */ + /* XXX: TODO: relay the signal to CKSTP_OUT pin */ + if (level) { +#if defined(PPC_DEBUG_IRQ) + printf("%s: stop the CPU\n", __func__); +#endif + env->halted = 1; + } else { +#if defined(PPC_DEBUG_IRQ) + printf("%s: restart the CPU\n", __func__); +#endif + env->halted = 0; + } + break; + case PPC_INPUT_HRESET: + /* Level sensitive - active low */ + if (level) { +#if 0 // XXX: TOFIX +#if defined(PPC_DEBUG_IRQ) + printf("%s: reset the CPU\n", __func__); +#endif + cpu_reset(env); +#endif + } + break; + case PPC_INPUT_SRESET: +#if defined(PPC_DEBUG_IRQ) + printf("%s: set the RESET IRQ state to %d\n", __func__, level); +#endif + ppc_set_irq(env, PPC_INTERRUPT_RESET, level); + break; + default: + /* Unknown pin - do nothing */ +#if defined(PPC_DEBUG_IRQ) + printf("%s: unknown IRQ pin %d\n", __func__, pin); +#endif + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); } } -/* External IRQ callback from OpenPIC IRQ controller */ -void ppc_openpic_irq (void *opaque, int n_IRQ, int level) +void ppc6xx_irq_init (CPUState *env) { - switch (n_IRQ) { - case OPENPIC_EVT_INT: - n_IRQ = PPC_INTERRUPT_EXT; - break; - case OPENPIC_EVT_CINT: - /* On PowerPC BookE, critical input use vector 0 */ - n_IRQ = PPC_INTERRUPT_RESET; - break; - case OPENPIC_EVT_MCK: - n_IRQ = PPC_INTERRUPT_MCK; - break; - case OPENPIC_EVT_DEBUG: - n_IRQ = PPC_INTERRUPT_DEBUG; - break; - case OPENPIC_EVT_RESET: - qemu_system_reset_request(); - return; - } - ppc_set_irq(opaque, n_IRQ, level); + env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env, 6); } /*****************************************************************************/ -/* PPC time base and decrementer emulation */ +/* PowerPC time base and decrementer emulation */ //#define DEBUG_TB struct ppc_tb_t { |