| /* |
| * "Universal" Interrupt Controller for PowerPPC 4xx embedded processors |
| * |
| * Copyright (c) 2007 Jocelyn Mayer |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "hw/intc/ppc-uic.h" |
| #include "hw/irq.h" |
| #include "cpu.h" |
| #include "hw/ppc/ppc.h" |
| #include "hw/qdev-properties.h" |
| #include "migration/vmstate.h" |
| #include "qapi/error.h" |
| |
| enum { |
| DCR_UICSR = 0x000, |
| DCR_UICSRS = 0x001, |
| DCR_UICER = 0x002, |
| DCR_UICCR = 0x003, |
| DCR_UICPR = 0x004, |
| DCR_UICTR = 0x005, |
| DCR_UICMSR = 0x006, |
| DCR_UICVR = 0x007, |
| DCR_UICVCR = 0x008, |
| DCR_UICMAX = 0x009, |
| }; |
| |
| /*#define DEBUG_UIC*/ |
| |
| #ifdef DEBUG_UIC |
| # define LOG_UIC(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) |
| #else |
| # define LOG_UIC(...) do { } while (0) |
| #endif |
| |
| static void ppcuic_trigger_irq(PPCUIC *uic) |
| { |
| uint32_t ir, cr; |
| int start, end, inc, i; |
| |
| /* Trigger interrupt if any is pending */ |
| ir = uic->uicsr & uic->uicer & (~uic->uiccr); |
| cr = uic->uicsr & uic->uicer & uic->uiccr; |
| LOG_UIC("%s: uicsr %08" PRIx32 " uicer %08" PRIx32 |
| " uiccr %08" PRIx32 "\n" |
| " %08" PRIx32 " ir %08" PRIx32 " cr %08" PRIx32 "\n", |
| __func__, uic->uicsr, uic->uicer, uic->uiccr, |
| uic->uicsr & uic->uicer, ir, cr); |
| if (ir != 0x0000000) { |
| LOG_UIC("Raise UIC interrupt\n"); |
| qemu_irq_raise(uic->output_int); |
| } else { |
| LOG_UIC("Lower UIC interrupt\n"); |
| qemu_irq_lower(uic->output_int); |
| } |
| /* Trigger critical interrupt if any is pending and update vector */ |
| if (cr != 0x0000000) { |
| qemu_irq_raise(uic->output_cint); |
| if (uic->use_vectors) { |
| /* Compute critical IRQ vector */ |
| if (uic->uicvcr & 1) { |
| start = 31; |
| end = 0; |
| inc = -1; |
| } else { |
| start = 0; |
| end = 31; |
| inc = 1; |
| } |
| uic->uicvr = uic->uicvcr & 0xFFFFFFFC; |
| for (i = start; i <= end; i += inc) { |
| if (cr & (1 << i)) { |
| uic->uicvr += (i - start) * 512 * inc; |
| break; |
| } |
| } |
| } |
| LOG_UIC("Raise UIC critical interrupt - " |
| "vector %08" PRIx32 "\n", uic->uicvr); |
| } else { |
| LOG_UIC("Lower UIC critical interrupt\n"); |
| qemu_irq_lower(uic->output_cint); |
| uic->uicvr = 0x00000000; |
| } |
| } |
| |
| static void ppcuic_set_irq(void *opaque, int irq_num, int level) |
| { |
| PPCUIC *uic; |
| uint32_t mask, sr; |
| |
| uic = opaque; |
| mask = 1U << (31 - irq_num); |
| LOG_UIC("%s: irq %d level %d uicsr %08" PRIx32 |
| " mask %08" PRIx32 " => %08" PRIx32 " %08" PRIx32 "\n", |
| __func__, irq_num, level, |
| uic->uicsr, mask, uic->uicsr & mask, level << irq_num); |
| if (irq_num < 0 || irq_num > 31) { |
| return; |
| } |
| sr = uic->uicsr; |
| |
| /* Update status register */ |
| if (uic->uictr & mask) { |
| /* Edge sensitive interrupt */ |
| if (level == 1) { |
| uic->uicsr |= mask; |
| } |
| } else { |
| /* Level sensitive interrupt */ |
| if (level == 1) { |
| uic->uicsr |= mask; |
| uic->level |= mask; |
| } else { |
| uic->uicsr &= ~mask; |
| uic->level &= ~mask; |
| } |
| } |
| LOG_UIC("%s: irq %d level %d sr %" PRIx32 " => " |
| "%08" PRIx32 "\n", __func__, irq_num, level, uic->uicsr, sr); |
| if (sr != uic->uicsr) { |
| ppcuic_trigger_irq(uic); |
| } |
| } |
| |
| static uint32_t dcr_read_uic(void *opaque, int dcrn) |
| { |
| PPCUIC *uic; |
| uint32_t ret; |
| |
| uic = opaque; |
| dcrn -= uic->dcr_base; |
| switch (dcrn) { |
| case DCR_UICSR: |
| case DCR_UICSRS: |
| ret = uic->uicsr; |
| break; |
| case DCR_UICER: |
| ret = uic->uicer; |
| break; |
| case DCR_UICCR: |
| ret = uic->uiccr; |
| break; |
| case DCR_UICPR: |
| ret = uic->uicpr; |
| break; |
| case DCR_UICTR: |
| ret = uic->uictr; |
| break; |
| case DCR_UICMSR: |
| ret = uic->uicsr & uic->uicer; |
| break; |
| case DCR_UICVR: |
| if (!uic->use_vectors) { |
| goto no_read; |
| } |
| ret = uic->uicvr; |
| break; |
| case DCR_UICVCR: |
| if (!uic->use_vectors) { |
| goto no_read; |
| } |
| ret = uic->uicvcr; |
| break; |
| default: |
| no_read: |
| ret = 0x00000000; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void dcr_write_uic(void *opaque, int dcrn, uint32_t val) |
| { |
| PPCUIC *uic; |
| |
| uic = opaque; |
| dcrn -= uic->dcr_base; |
| LOG_UIC("%s: dcr %d val 0x%x\n", __func__, dcrn, val); |
| switch (dcrn) { |
| case DCR_UICSR: |
| uic->uicsr &= ~val; |
| uic->uicsr |= uic->level; |
| ppcuic_trigger_irq(uic); |
| break; |
| case DCR_UICSRS: |
| uic->uicsr |= val; |
| ppcuic_trigger_irq(uic); |
| break; |
| case DCR_UICER: |
| uic->uicer = val; |
| ppcuic_trigger_irq(uic); |
| break; |
| case DCR_UICCR: |
| uic->uiccr = val; |
| ppcuic_trigger_irq(uic); |
| break; |
| case DCR_UICPR: |
| uic->uicpr = val; |
| break; |
| case DCR_UICTR: |
| uic->uictr = val; |
| ppcuic_trigger_irq(uic); |
| break; |
| case DCR_UICMSR: |
| break; |
| case DCR_UICVR: |
| break; |
| case DCR_UICVCR: |
| uic->uicvcr = val & 0xFFFFFFFD; |
| ppcuic_trigger_irq(uic); |
| break; |
| } |
| } |
| |
| static void ppc_uic_reset(DeviceState *dev) |
| { |
| PPCUIC *uic = PPC_UIC(dev); |
| |
| uic->uiccr = 0x00000000; |
| uic->uicer = 0x00000000; |
| uic->uicpr = 0x00000000; |
| uic->uicsr = 0x00000000; |
| uic->uictr = 0x00000000; |
| if (uic->use_vectors) { |
| uic->uicvcr = 0x00000000; |
| uic->uicvr = 0x0000000; |
| } |
| } |
| |
| static void ppc_uic_realize(DeviceState *dev, Error **errp) |
| { |
| PPCUIC *uic = PPC_UIC(dev); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| PowerPCCPU *cpu; |
| int i; |
| |
| if (!uic->cpu) { |
| /* This is a programming error in the code using this device */ |
| error_setg(errp, "ppc-uic 'cpu' link property was not set"); |
| return; |
| } |
| |
| cpu = POWERPC_CPU(uic->cpu); |
| for (i = 0; i < DCR_UICMAX; i++) { |
| ppc_dcr_register(&cpu->env, uic->dcr_base + i, uic, |
| &dcr_read_uic, &dcr_write_uic); |
| } |
| |
| sysbus_init_irq(sbd, &uic->output_int); |
| sysbus_init_irq(sbd, &uic->output_cint); |
| qdev_init_gpio_in(dev, ppcuic_set_irq, UIC_MAX_IRQ); |
| } |
| |
| static Property ppc_uic_properties[] = { |
| DEFINE_PROP_LINK("cpu", PPCUIC, cpu, TYPE_CPU, CPUState *), |
| DEFINE_PROP_UINT32("dcr-base", PPCUIC, dcr_base, 0xc0), |
| DEFINE_PROP_BOOL("use-vectors", PPCUIC, use_vectors, true), |
| DEFINE_PROP_END_OF_LIST() |
| }; |
| |
| static const VMStateDescription ppc_uic_vmstate = { |
| .name = "ppc-uic", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(level, PPCUIC), |
| VMSTATE_UINT32(uicsr, PPCUIC), |
| VMSTATE_UINT32(uicer, PPCUIC), |
| VMSTATE_UINT32(uiccr, PPCUIC), |
| VMSTATE_UINT32(uicpr, PPCUIC), |
| VMSTATE_UINT32(uictr, PPCUIC), |
| VMSTATE_UINT32(uicvcr, PPCUIC), |
| VMSTATE_UINT32(uicvr, PPCUIC), |
| VMSTATE_END_OF_LIST() |
| }, |
| }; |
| |
| static void ppc_uic_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->reset = ppc_uic_reset; |
| dc->realize = ppc_uic_realize; |
| dc->vmsd = &ppc_uic_vmstate; |
| device_class_set_props(dc, ppc_uic_properties); |
| } |
| |
| static const TypeInfo ppc_uic_info = { |
| .name = TYPE_PPC_UIC, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(PPCUIC), |
| .class_init = ppc_uic_class_init, |
| }; |
| |
| static void ppc_uic_register_types(void) |
| { |
| type_register_static(&ppc_uic_info); |
| } |
| |
| type_init(ppc_uic_register_types); |
