/* * QEMU PowerPC E500 embedded processors pci controller emulation * * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved. * * Author: Yu Liu, * * This file is derived from hw/ppc4xx_pci.c, * the copyright for that material belongs to the original owners. * * This is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include "qemu/osdep.h" #include "hw/hw.h" #include "hw/irq.h" #include "hw/ppc/e500-ccsr.h" #include "migration/vmstate.h" #include "hw/pci/pci.h" #include "hw/pci/pci_host.h" #include "qemu/bswap.h" #include "qemu/module.h" #include "hw/pci-host/ppce500.h" #ifdef DEBUG_PCI #define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__) #else #define pci_debug(fmt, ...) #endif #define PCIE500_CFGADDR 0x0 #define PCIE500_CFGDATA 0x4 #define PCIE500_REG_BASE 0xC00 #define PCIE500_ALL_SIZE 0x1000 #define PCIE500_REG_SIZE (PCIE500_ALL_SIZE - PCIE500_REG_BASE) #define PCIE500_PCI_IOLEN 0x10000ULL #define PPCE500_PCI_CONFIG_ADDR 0x0 #define PPCE500_PCI_CONFIG_DATA 0x4 #define PPCE500_PCI_INTACK 0x8 #define PPCE500_PCI_OW1 (0xC20 - PCIE500_REG_BASE) #define PPCE500_PCI_OW2 (0xC40 - PCIE500_REG_BASE) #define PPCE500_PCI_OW3 (0xC60 - PCIE500_REG_BASE) #define PPCE500_PCI_OW4 (0xC80 - PCIE500_REG_BASE) #define PPCE500_PCI_IW3 (0xDA0 - PCIE500_REG_BASE) #define PPCE500_PCI_IW2 (0xDC0 - PCIE500_REG_BASE) #define PPCE500_PCI_IW1 (0xDE0 - PCIE500_REG_BASE) #define PPCE500_PCI_GASKET_TIMR (0xE20 - PCIE500_REG_BASE) #define PCI_POTAR 0x0 #define PCI_POTEAR 0x4 #define PCI_POWBAR 0x8 #define PCI_POWAR 0x10 #define PCI_PITAR 0x0 #define PCI_PIWBAR 0x8 #define PCI_PIWBEAR 0xC #define PCI_PIWAR 0x10 #define PPCE500_PCI_NR_POBS 5 #define PPCE500_PCI_NR_PIBS 3 #define PIWAR_EN 0x80000000 /* Enable */ #define PIWAR_PF 0x20000000 /* prefetch */ #define PIWAR_TGI_LOCAL 0x00f00000 /* target - local memory */ #define PIWAR_READ_SNOOP 0x00050000 #define PIWAR_WRITE_SNOOP 0x00005000 #define PIWAR_SZ_MASK 0x0000003f struct pci_outbound { uint32_t potar; uint32_t potear; uint32_t powbar; uint32_t powar; MemoryRegion mem; }; struct pci_inbound { uint32_t pitar; uint32_t piwbar; uint32_t piwbear; uint32_t piwar; MemoryRegion mem; }; #define TYPE_PPC_E500_PCI_HOST_BRIDGE "e500-pcihost" #define PPC_E500_PCI_HOST_BRIDGE(obj) \ OBJECT_CHECK(PPCE500PCIState, (obj), TYPE_PPC_E500_PCI_HOST_BRIDGE) struct PPCE500PCIState { PCIHostState parent_obj; struct pci_outbound pob[PPCE500_PCI_NR_POBS]; struct pci_inbound pib[PPCE500_PCI_NR_PIBS]; uint32_t gasket_time; qemu_irq irq[PCI_NUM_PINS]; uint32_t irq_num[PCI_NUM_PINS]; uint32_t first_slot; uint32_t first_pin_irq; AddressSpace bm_as; MemoryRegion bm; /* mmio maps */ MemoryRegion container; MemoryRegion iomem; MemoryRegion pio; MemoryRegion busmem; }; #define TYPE_PPC_E500_PCI_BRIDGE "e500-host-bridge" #define PPC_E500_PCI_BRIDGE(obj) \ OBJECT_CHECK(PPCE500PCIBridgeState, (obj), TYPE_PPC_E500_PCI_BRIDGE) struct PPCE500PCIBridgeState { /*< private >*/ PCIDevice parent; /*< public >*/ MemoryRegion bar0; }; typedef struct PPCE500PCIBridgeState PPCE500PCIBridgeState; typedef struct PPCE500PCIState PPCE500PCIState; static uint64_t pci_reg_read4(void *opaque, hwaddr addr, unsigned size) { PPCE500PCIState *pci = opaque; unsigned long win; uint32_t value = 0; int idx; win = addr & 0xfe0; switch (win) { case PPCE500_PCI_OW1: case PPCE500_PCI_OW2: case PPCE500_PCI_OW3: case PPCE500_PCI_OW4: idx = (addr >> 5) & 0x7; switch (addr & 0x1F) { case PCI_POTAR: value = pci->pob[idx].potar; break; case PCI_POTEAR: value = pci->pob[idx].potear; break; case PCI_POWBAR: value = pci->pob[idx].powbar; break; case PCI_POWAR: value = pci->pob[idx].powar; break; default: break; } break; case PPCE500_PCI_IW3: case PPCE500_PCI_IW2: case PPCE500_PCI_IW1: idx = ((addr >> 5) & 0x3) - 1; switch (addr & 0x1F) { case PCI_PITAR: value = pci->pib[idx].pitar; break; case PCI_PIWBAR: value = pci->pib[idx].piwbar; break; case PCI_PIWBEAR: value = pci->pib[idx].piwbear; break; case PCI_PIWAR: value = pci->pib[idx].piwar; break; default: break; }; break; case PPCE500_PCI_GASKET_TIMR: value = pci->gasket_time; break; default: break; } pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__, win, addr, value); return value; } /* DMA mapping */ static void e500_update_piw(PPCE500PCIState *pci, int idx) { uint64_t tar = ((uint64_t)pci->pib[idx].pitar) << 12; uint64_t wbar = ((uint64_t)pci->pib[idx].piwbar) << 12; uint64_t war = pci->pib[idx].piwar; uint64_t size = 2ULL << (war & PIWAR_SZ_MASK); MemoryRegion *address_space_mem = get_system_memory(); MemoryRegion *mem = &pci->pib[idx].mem; MemoryRegion *bm = &pci->bm; char *name; if (memory_region_is_mapped(mem)) { /* Before we modify anything, unmap and destroy the region */ memory_region_del_subregion(bm, mem); object_unparent(OBJECT(mem)); } if (!(war & PIWAR_EN)) { /* Not enabled, nothing to do */ return; } name = g_strdup_printf("PCI Inbound Window %d", idx); memory_region_init_alias(mem, OBJECT(pci), name, address_space_mem, tar, size); memory_region_add_subregion_overlap(bm, wbar, mem, -1); g_free(name); pci_debug("%s: Added window of size=%#lx from PCI=%#lx to CPU=%#lx\n", __func__, size, wbar, tar); } /* BAR mapping */ static void e500_update_pow(PPCE500PCIState *pci, int idx) { uint64_t tar = ((uint64_t)pci->pob[idx].potar) << 12; uint64_t wbar = ((uint64_t)pci->pob[idx].powbar) << 12; uint64_t war = pci->pob[idx].powar; uint64_t size = 2ULL << (war & PIWAR_SZ_MASK); MemoryRegion *mem = &pci->pob[idx].mem; MemoryRegion *address_space_mem = get_system_memory(); char *name; if (memory_region_is_mapped(mem)) { /* Before we modify anything, unmap and destroy the region */ memory_region_del_subregion(address_space_mem, mem); object_unparent(OBJECT(mem)); } if (!(war & PIWAR_EN)) { /* Not enabled, nothing to do */ return; } name = g_strdup_printf("PCI Outbound Window %d", idx); memory_region_init_alias(mem, OBJECT(pci), name, &pci->busmem, tar, size); memory_region_add_subregion(address_space_mem, wbar, mem); g_free(name); pci_debug("%s: Added window of size=%#lx from CPU=%#lx to PCI=%#lx\n", __func__, size, wbar, tar); } static void pci_reg_write4(void *opaque, hwaddr addr, uint64_t value, unsigned size) { PPCE500PCIState *pci = opaque; unsigned long win; int idx; win = addr & 0xfe0; pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n", __func__, (unsigned)value, win, addr); switch (win) { case PPCE500_PCI_OW1: case PPCE500_PCI_OW2: case PPCE500_PCI_OW3: case PPCE500_PCI_OW4: idx = (addr >> 5) & 0x7; switch (addr & 0x1F) { case PCI_POTAR: pci->pob[idx].potar = value; e500_update_pow(pci, idx); break; case PCI_POTEAR: pci->pob[idx].potear = value; e500_update_pow(pci, idx); break; case PCI_POWBAR: pci->pob[idx].powbar = value; e500_update_pow(pci, idx); break; case PCI_POWAR: pci->pob[idx].powar = value; e500_update_pow(pci, idx); break; default: break; }; break; case PPCE500_PCI_IW3: case PPCE500_PCI_IW2: case PPCE500_PCI_IW1: idx = ((addr >> 5) & 0x3) - 1; switch (addr & 0x1F) { case PCI_PITAR: pci->pib[idx].pitar = value; e500_update_piw(pci, idx); break; case PCI_PIWBAR: pci->pib[idx].piwbar = value; e500_update_piw(pci, idx); break; case PCI_PIWBEAR: pci->pib[idx].piwbear = value; e500_update_piw(pci, idx); break; case PCI_PIWAR: pci->pib[idx].piwar = value; e500_update_piw(pci, idx); break; default: break; }; break; case PPCE500_PCI_GASKET_TIMR: pci->gasket_time = value; break; default: break; }; } static const MemoryRegionOps e500_pci_reg_ops = { .read = pci_reg_read4, .write = pci_reg_write4, .endianness = DEVICE_BIG_ENDIAN, }; static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int pin) { int devno = pci_dev->devfn >> 3; int ret; ret = ppce500_pci_map_irq_slot(devno, pin); pci_debug("%s: devfn %x irq %d -> %d devno:%x\n", __func__, pci_dev->devfn, pin, ret, devno); return ret; } static void mpc85xx_pci_set_irq(void *opaque, int pin, int level) { PPCE500PCIState *s = opaque; qemu_irq *pic = s->irq; pci_debug("%s: PCI irq %d, level:%d\n", __func__, pin , level); qemu_set_irq(pic[pin], level); } static PCIINTxRoute e500_route_intx_pin_to_irq(void *opaque, int pin) { PCIINTxRoute route; PPCE500PCIState *s = opaque; route.mode = PCI_INTX_ENABLED; route.irq = s->irq_num[pin]; pci_debug("%s: PCI irq-pin = %d, irq_num= %d\n", __func__, pin, route.irq); return route; } static const VMStateDescription vmstate_pci_outbound = { .name = "pci_outbound", .version_id = 0, .minimum_version_id = 0, .fields = (VMStateField[]) { VMSTATE_UINT32(potar, struct pci_outbound), VMSTATE_UINT32(potear, struct pci_outbound), VMSTATE_UINT32(powbar, struct pci_outbound), VMSTATE_UINT32(powar, struct pci_outbound), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_pci_inbound = { .name = "pci_inbound", .version_id = 0, .minimum_version_id = 0, .fields = (VMStateField[]) { VMSTATE_UINT32(pitar, struct pci_inbound), VMSTATE_UINT32(piwbar, struct pci_inbound), VMSTATE_UINT32(piwbear, struct pci_inbound), VMSTATE_UINT32(piwar, struct pci_inbound), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_ppce500_pci = { .name = "ppce500_pci", .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1, vmstate_pci_outbound, struct pci_outbound), VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1, vmstate_pci_inbound, struct pci_inbound), VMSTATE_UINT32(gasket_time, PPCE500PCIState), VMSTATE_END_OF_LIST() } }; #include "exec/address-spaces.h" static void e500_pcihost_bridge_realize(PCIDevice *d, Error **errp) { PPCE500PCIBridgeState *b = PPC_E500_PCI_BRIDGE(d); PPCE500CCSRState *ccsr = CCSR(container_get(qdev_get_machine(), "/e500-ccsr")); memory_region_init_alias(&b->bar0, OBJECT(ccsr), "e500-pci-bar0", &ccsr->ccsr_space, 0, int128_get64(ccsr->ccsr_space.size)); pci_register_bar(d, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &b->bar0); } static AddressSpace *e500_pcihost_set_iommu(PCIBus *bus, void *opaque, int devfn) { PPCE500PCIState *s = opaque; return &s->bm_as; } static void e500_pcihost_realize(DeviceState *dev, Error **errp) { SysBusDevice *sbd = SYS_BUS_DEVICE(dev); PCIHostState *h; PPCE500PCIState *s; PCIBus *b; int i; h = PCI_HOST_BRIDGE(dev); s = PPC_E500_PCI_HOST_BRIDGE(dev); for (i = 0; i < ARRAY_SIZE(s->irq); i++) { sysbus_init_irq(sbd, &s->irq[i]); } for (i = 0; i < PCI_NUM_PINS; i++) { s->irq_num[i] = s->first_pin_irq + i; } memory_region_init(&s->pio, OBJECT(s), "pci-pio", PCIE500_PCI_IOLEN); memory_region_init(&s->busmem, OBJECT(s), "pci bus memory", UINT64_MAX); /* PIO lives at the bottom of our bus space */ memory_region_add_subregion_overlap(&s->busmem, 0, &s->pio, -2); b = pci_register_root_bus(dev, NULL, mpc85xx_pci_set_irq, mpc85xx_pci_map_irq, s, &s->busmem, &s->pio, PCI_DEVFN(s->first_slot, 0), 4, TYPE_PCI_BUS); h->bus = b; /* Set up PCI view of memory */ memory_region_init(&s->bm, OBJECT(s), "bm-e500", UINT64_MAX); memory_region_add_subregion(&s->bm, 0x0, &s->busmem); address_space_init(&s->bm_as, &s->bm, "pci-bm"); pci_setup_iommu(b, e500_pcihost_set_iommu, s); pci_create_simple(b, 0, "e500-host-bridge"); memory_region_init(&s->container, OBJECT(h), "pci-container", PCIE500_ALL_SIZE); memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_be_ops, h, "pci-conf-idx", 4); memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, h, "pci-conf-data", 4); memory_region_init_io(&s->iomem, OBJECT(s), &e500_pci_reg_ops, s, "pci.reg", PCIE500_REG_SIZE); memory_region_add_subregion(&s->container, PCIE500_CFGADDR, &h->conf_mem); memory_region_add_subregion(&s->container, PCIE500_CFGDATA, &h->data_mem); memory_region_add_subregion(&s->container, PCIE500_REG_BASE, &s->iomem); sysbus_init_mmio(sbd, &s->container); pci_bus_set_route_irq_fn(b, e500_route_intx_pin_to_irq); } static void e500_host_bridge_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->realize = e500_pcihost_bridge_realize; k->vendor_id = PCI_VENDOR_ID_FREESCALE; k->device_id = PCI_DEVICE_ID_MPC8533E; k->class_id = PCI_CLASS_PROCESSOR_POWERPC; dc->desc = "Host bridge"; /* * PCI-facing part of the host bridge, not usable without the * host-facing part, which can't be device_add'ed, yet. */ dc->user_creatable = false; } static const TypeInfo e500_host_bridge_info = { .name = "e500-host-bridge", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PPCE500PCIBridgeState), .class_init = e500_host_bridge_class_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { }, }, }; static Property pcihost_properties[] = { DEFINE_PROP_UINT32("first_slot", PPCE500PCIState, first_slot, 0x11), DEFINE_PROP_UINT32("first_pin_irq", PPCE500PCIState, first_pin_irq, 0x1), DEFINE_PROP_END_OF_LIST(), }; static void e500_pcihost_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = e500_pcihost_realize; set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); dc->props = pcihost_properties; dc->vmsd = &vmstate_ppce500_pci; } static const TypeInfo e500_pcihost_info = { .name = TYPE_PPC_E500_PCI_HOST_BRIDGE, .parent = TYPE_PCI_HOST_BRIDGE, .instance_size = sizeof(PPCE500PCIState), .class_init = e500_pcihost_class_init, }; static void e500_pci_register_types(void) { type_register_static(&e500_pcihost_info); type_register_static(&e500_host_bridge_info); } type_init(e500_pci_register_types)