149ab747fSPaolo Bonzini /* 249ab747fSPaolo Bonzini * Heathrow PIC support (OldWorld PowerMac) 349ab747fSPaolo Bonzini * 449ab747fSPaolo Bonzini * Copyright (c) 2005-2007 Fabrice Bellard 549ab747fSPaolo Bonzini * Copyright (c) 2007 Jocelyn Mayer 649ab747fSPaolo Bonzini * 749ab747fSPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy 849ab747fSPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal 949ab747fSPaolo Bonzini * in the Software without restriction, including without limitation the rights 1049ab747fSPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 1149ab747fSPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is 1249ab747fSPaolo Bonzini * furnished to do so, subject to the following conditions: 1349ab747fSPaolo Bonzini * 1449ab747fSPaolo Bonzini * The above copyright notice and this permission notice shall be included in 1549ab747fSPaolo Bonzini * all copies or substantial portions of the Software. 1649ab747fSPaolo Bonzini * 1749ab747fSPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1849ab747fSPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1949ab747fSPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 2049ab747fSPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 2149ab747fSPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 2249ab747fSPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 2349ab747fSPaolo Bonzini * THE SOFTWARE. 2449ab747fSPaolo Bonzini */ 2590191d07SPeter Maydell #include "qemu/osdep.h" 2649ab747fSPaolo Bonzini #include "hw/hw.h" 2749ab747fSPaolo Bonzini #include "hw/ppc/mac.h" 28086df4f3SMark Cave-Ayland #include "hw/intc/heathrow_pic.h" 29ec7c2709SMark Cave-Ayland #include "trace.h" 3049ab747fSPaolo Bonzini 31086df4f3SMark Cave-Ayland static inline int heathrow_check_irq(HeathrowPICState *pic) 3249ab747fSPaolo Bonzini { 3349ab747fSPaolo Bonzini return (pic->events | (pic->levels & pic->level_triggered)) & pic->mask; 3449ab747fSPaolo Bonzini } 3549ab747fSPaolo Bonzini 3649ab747fSPaolo Bonzini /* update the CPU irq state */ 37086df4f3SMark Cave-Ayland static void heathrow_update_irq(HeathrowState *s) 3849ab747fSPaolo Bonzini { 39086df4f3SMark Cave-Ayland if (heathrow_check_irq(&s->pics[0]) || 40086df4f3SMark Cave-Ayland heathrow_check_irq(&s->pics[1])) { 4149ab747fSPaolo Bonzini qemu_irq_raise(s->irqs[0]); 4249ab747fSPaolo Bonzini } else { 4349ab747fSPaolo Bonzini qemu_irq_lower(s->irqs[0]); 4449ab747fSPaolo Bonzini } 4549ab747fSPaolo Bonzini } 4649ab747fSPaolo Bonzini 47086df4f3SMark Cave-Ayland static void heathrow_write(void *opaque, hwaddr addr, 4849ab747fSPaolo Bonzini uint64_t value, unsigned size) 4949ab747fSPaolo Bonzini { 50086df4f3SMark Cave-Ayland HeathrowState *s = opaque; 51086df4f3SMark Cave-Ayland HeathrowPICState *pic; 5249ab747fSPaolo Bonzini unsigned int n; 5349ab747fSPaolo Bonzini 5449ab747fSPaolo Bonzini n = ((addr & 0xfff) - 0x10) >> 4; 55ec7c2709SMark Cave-Ayland trace_heathrow_write(addr, n, value); 5649ab747fSPaolo Bonzini if (n >= 2) 5749ab747fSPaolo Bonzini return; 5849ab747fSPaolo Bonzini pic = &s->pics[n]; 5949ab747fSPaolo Bonzini switch(addr & 0xf) { 6049ab747fSPaolo Bonzini case 0x04: 6149ab747fSPaolo Bonzini pic->mask = value; 62086df4f3SMark Cave-Ayland heathrow_update_irq(s); 6349ab747fSPaolo Bonzini break; 6449ab747fSPaolo Bonzini case 0x08: 6549ab747fSPaolo Bonzini /* do not reset level triggered IRQs */ 6649ab747fSPaolo Bonzini value &= ~pic->level_triggered; 6749ab747fSPaolo Bonzini pic->events &= ~value; 68086df4f3SMark Cave-Ayland heathrow_update_irq(s); 6949ab747fSPaolo Bonzini break; 7049ab747fSPaolo Bonzini default: 7149ab747fSPaolo Bonzini break; 7249ab747fSPaolo Bonzini } 7349ab747fSPaolo Bonzini } 7449ab747fSPaolo Bonzini 75086df4f3SMark Cave-Ayland static uint64_t heathrow_read(void *opaque, hwaddr addr, 7649ab747fSPaolo Bonzini unsigned size) 7749ab747fSPaolo Bonzini { 78086df4f3SMark Cave-Ayland HeathrowState *s = opaque; 79086df4f3SMark Cave-Ayland HeathrowPICState *pic; 8049ab747fSPaolo Bonzini unsigned int n; 8149ab747fSPaolo Bonzini uint32_t value; 8249ab747fSPaolo Bonzini 8349ab747fSPaolo Bonzini n = ((addr & 0xfff) - 0x10) >> 4; 8449ab747fSPaolo Bonzini if (n >= 2) { 8549ab747fSPaolo Bonzini value = 0; 8649ab747fSPaolo Bonzini } else { 8749ab747fSPaolo Bonzini pic = &s->pics[n]; 8849ab747fSPaolo Bonzini switch(addr & 0xf) { 8949ab747fSPaolo Bonzini case 0x0: 9049ab747fSPaolo Bonzini value = pic->events; 9149ab747fSPaolo Bonzini break; 9249ab747fSPaolo Bonzini case 0x4: 9349ab747fSPaolo Bonzini value = pic->mask; 9449ab747fSPaolo Bonzini break; 9549ab747fSPaolo Bonzini case 0xc: 9649ab747fSPaolo Bonzini value = pic->levels; 9749ab747fSPaolo Bonzini break; 9849ab747fSPaolo Bonzini default: 9949ab747fSPaolo Bonzini value = 0; 10049ab747fSPaolo Bonzini break; 10149ab747fSPaolo Bonzini } 10249ab747fSPaolo Bonzini } 103ec7c2709SMark Cave-Ayland trace_heathrow_read(addr, n, value); 10449ab747fSPaolo Bonzini return value; 10549ab747fSPaolo Bonzini } 10649ab747fSPaolo Bonzini 107086df4f3SMark Cave-Ayland static const MemoryRegionOps heathrow_ops = { 108086df4f3SMark Cave-Ayland .read = heathrow_read, 109086df4f3SMark Cave-Ayland .write = heathrow_write, 11049ab747fSPaolo Bonzini .endianness = DEVICE_LITTLE_ENDIAN, 11149ab747fSPaolo Bonzini }; 11249ab747fSPaolo Bonzini 113086df4f3SMark Cave-Ayland static void heathrow_set_irq(void *opaque, int num, int level) 11449ab747fSPaolo Bonzini { 115086df4f3SMark Cave-Ayland HeathrowState *s = opaque; 116086df4f3SMark Cave-Ayland HeathrowPICState *pic; 11749ab747fSPaolo Bonzini unsigned int irq_bit; 118ec7c2709SMark Cave-Ayland int last_level; 11949ab747fSPaolo Bonzini 12049ab747fSPaolo Bonzini pic = &s->pics[1 - (num >> 5)]; 12149ab747fSPaolo Bonzini irq_bit = 1 << (num & 0x1f); 122ec7c2709SMark Cave-Ayland last_level = (pic->levels & irq_bit) ? 1 : 0; 123ec7c2709SMark Cave-Ayland 12449ab747fSPaolo Bonzini if (level) { 12549ab747fSPaolo Bonzini pic->events |= irq_bit & ~pic->level_triggered; 12649ab747fSPaolo Bonzini pic->levels |= irq_bit; 12749ab747fSPaolo Bonzini } else { 12849ab747fSPaolo Bonzini pic->levels &= ~irq_bit; 12949ab747fSPaolo Bonzini } 130ec7c2709SMark Cave-Ayland 131ec7c2709SMark Cave-Ayland if (last_level != level) { 132ec7c2709SMark Cave-Ayland trace_heathrow_set_irq(num, level); 133ec7c2709SMark Cave-Ayland } 134ec7c2709SMark Cave-Ayland 135086df4f3SMark Cave-Ayland heathrow_update_irq(s); 13649ab747fSPaolo Bonzini } 13749ab747fSPaolo Bonzini 13849ab747fSPaolo Bonzini static const VMStateDescription vmstate_heathrow_pic_one = { 13949ab747fSPaolo Bonzini .name = "heathrow_pic_one", 14049ab747fSPaolo Bonzini .version_id = 0, 14149ab747fSPaolo Bonzini .minimum_version_id = 0, 14249ab747fSPaolo Bonzini .fields = (VMStateField[]) { 143086df4f3SMark Cave-Ayland VMSTATE_UINT32(events, HeathrowPICState), 144086df4f3SMark Cave-Ayland VMSTATE_UINT32(mask, HeathrowPICState), 145086df4f3SMark Cave-Ayland VMSTATE_UINT32(levels, HeathrowPICState), 146086df4f3SMark Cave-Ayland VMSTATE_UINT32(level_triggered, HeathrowPICState), 14749ab747fSPaolo Bonzini VMSTATE_END_OF_LIST() 14849ab747fSPaolo Bonzini } 14949ab747fSPaolo Bonzini }; 15049ab747fSPaolo Bonzini 151086df4f3SMark Cave-Ayland static const VMStateDescription vmstate_heathrow = { 15249ab747fSPaolo Bonzini .name = "heathrow_pic", 15349ab747fSPaolo Bonzini .version_id = 1, 15449ab747fSPaolo Bonzini .minimum_version_id = 1, 15549ab747fSPaolo Bonzini .fields = (VMStateField[]) { 156086df4f3SMark Cave-Ayland VMSTATE_STRUCT_ARRAY(pics, HeathrowState, 2, 1, 157086df4f3SMark Cave-Ayland vmstate_heathrow_pic_one, HeathrowPICState), 15849ab747fSPaolo Bonzini VMSTATE_END_OF_LIST() 15949ab747fSPaolo Bonzini } 16049ab747fSPaolo Bonzini }; 16149ab747fSPaolo Bonzini 162086df4f3SMark Cave-Ayland static void heathrow_reset(DeviceState *d) 16349ab747fSPaolo Bonzini { 164086df4f3SMark Cave-Ayland HeathrowState *s = HEATHROW(d); 16549ab747fSPaolo Bonzini 16649ab747fSPaolo Bonzini s->pics[0].level_triggered = 0; 16749ab747fSPaolo Bonzini s->pics[1].level_triggered = 0x1ff00000; 16849ab747fSPaolo Bonzini } 16949ab747fSPaolo Bonzini 170086df4f3SMark Cave-Ayland static void heathrow_init(Object *obj) 171086df4f3SMark Cave-Ayland { 172086df4f3SMark Cave-Ayland HeathrowState *s = HEATHROW(obj); 173c2964600SMark Cave-Ayland SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 174086df4f3SMark Cave-Ayland 175*a5ed75feSMark Cave-Ayland /* only 1 CPU */ 176*a5ed75feSMark Cave-Ayland qdev_init_gpio_out(DEVICE(obj), s->irqs, 1); 177*a5ed75feSMark Cave-Ayland 178*a5ed75feSMark Cave-Ayland qdev_init_gpio_in(DEVICE(obj), heathrow_set_irq, HEATHROW_NUM_IRQS); 179*a5ed75feSMark Cave-Ayland 180086df4f3SMark Cave-Ayland memory_region_init_io(&s->mem, OBJECT(s), &heathrow_ops, s, 181086df4f3SMark Cave-Ayland "heathrow-pic", 0x1000); 182c2964600SMark Cave-Ayland sysbus_init_mmio(sbd, &s->mem); 183086df4f3SMark Cave-Ayland } 184086df4f3SMark Cave-Ayland 185086df4f3SMark Cave-Ayland static void heathrow_class_init(ObjectClass *oc, void *data) 186086df4f3SMark Cave-Ayland { 187086df4f3SMark Cave-Ayland DeviceClass *dc = DEVICE_CLASS(oc); 188086df4f3SMark Cave-Ayland 189086df4f3SMark Cave-Ayland dc->reset = heathrow_reset; 190086df4f3SMark Cave-Ayland dc->vmsd = &vmstate_heathrow; 191086df4f3SMark Cave-Ayland set_bit(DEVICE_CATEGORY_MISC, dc->categories); 192086df4f3SMark Cave-Ayland } 193086df4f3SMark Cave-Ayland 194086df4f3SMark Cave-Ayland static const TypeInfo heathrow_type_info = { 195086df4f3SMark Cave-Ayland .name = TYPE_HEATHROW, 196086df4f3SMark Cave-Ayland .parent = TYPE_SYS_BUS_DEVICE, 197086df4f3SMark Cave-Ayland .instance_size = sizeof(HeathrowState), 198086df4f3SMark Cave-Ayland .instance_init = heathrow_init, 199086df4f3SMark Cave-Ayland .class_init = heathrow_class_init, 200086df4f3SMark Cave-Ayland }; 201086df4f3SMark Cave-Ayland 202086df4f3SMark Cave-Ayland static void heathrow_register_types(void) 203086df4f3SMark Cave-Ayland { 204086df4f3SMark Cave-Ayland type_register_static(&heathrow_type_info); 205086df4f3SMark Cave-Ayland } 206086df4f3SMark Cave-Ayland 207086df4f3SMark Cave-Ayland type_init(heathrow_register_types) 208