/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. * * Copyright IBM Corp. 2008 * * Authors: Hollis Blanchard <hollisb@us.ibm.com> */ /* This file implements emulation of the 32-bit PCI controller found in some * 4xx SoCs, such as the 440EP. */ #include "hw.h" #include "ppc.h" #include "ppc4xx.h" #include "pci.h" #include "pci_host.h" #undef DEBUG #ifdef DEBUG #define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0) #else #define DPRINTF(fmt, ...) #endif /* DEBUG */ struct PCIMasterMap { uint32_t la; uint32_t ma; uint32_t pcila; uint32_t pciha; }; struct PCITargetMap { uint32_t ms; uint32_t la; }; #define PPC4xx_PCI_NR_PMMS 3 #define PPC4xx_PCI_NR_PTMS 2 struct PPC4xxPCIState { struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS]; struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS]; PCIHostState pci_state; PCIDevice *pci_dev; }; typedef struct PPC4xxPCIState PPC4xxPCIState; #define PCIC0_CFGADDR 0x0 #define PCIC0_CFGDATA 0x4 /* PLB Memory Map (PMM) registers specify which PLB addresses are translated to * PCI accesses. */ #define PCIL0_PMM0LA 0x0 #define PCIL0_PMM0MA 0x4 #define PCIL0_PMM0PCILA 0x8 #define PCIL0_PMM0PCIHA 0xc #define PCIL0_PMM1LA 0x10 #define PCIL0_PMM1MA 0x14 #define PCIL0_PMM1PCILA 0x18 #define PCIL0_PMM1PCIHA 0x1c #define PCIL0_PMM2LA 0x20 #define PCIL0_PMM2MA 0x24 #define PCIL0_PMM2PCILA 0x28 #define PCIL0_PMM2PCIHA 0x2c /* PCI Target Map (PTM) registers specify which PCI addresses are translated to * PLB accesses. */ #define PCIL0_PTM1MS 0x30 #define PCIL0_PTM1LA 0x34 #define PCIL0_PTM2MS 0x38 #define PCIL0_PTM2LA 0x3c #define PCI_REG_SIZE 0x40 static uint32_t pci4xx_cfgaddr_readl(void *opaque, target_phys_addr_t addr) { PPC4xxPCIState *ppc4xx_pci = opaque; return ppc4xx_pci->pci_state.config_reg; } static CPUReadMemoryFunc * const pci4xx_cfgaddr_read[] = { &pci4xx_cfgaddr_readl, &pci4xx_cfgaddr_readl, &pci4xx_cfgaddr_readl, }; static void pci4xx_cfgaddr_writel(void *opaque, target_phys_addr_t addr, uint32_t value) { PPC4xxPCIState *ppc4xx_pci = opaque; ppc4xx_pci->pci_state.config_reg = value & ~0x3; } static CPUWriteMemoryFunc * const pci4xx_cfgaddr_write[] = { &pci4xx_cfgaddr_writel, &pci4xx_cfgaddr_writel, &pci4xx_cfgaddr_writel, }; static void ppc4xx_pci_reg_write4(void *opaque, target_phys_addr_t offset, uint32_t value) { struct PPC4xxPCIState *pci = opaque; /* We ignore all target attempts at PCI configuration, effectively * assuming a bidirectional 1:1 mapping of PLB and PCI space. */ switch (offset) { case PCIL0_PMM0LA: pci->pmm[0].la = value; break; case PCIL0_PMM0MA: pci->pmm[0].ma = value; break; case PCIL0_PMM0PCIHA: pci->pmm[0].pciha = value; break; case PCIL0_PMM0PCILA: pci->pmm[0].pcila = value; break; case PCIL0_PMM1LA: pci->pmm[1].la = value; break; case PCIL0_PMM1MA: pci->pmm[1].ma = value; break; case PCIL0_PMM1PCIHA: pci->pmm[1].pciha = value; break; case PCIL0_PMM1PCILA: pci->pmm[1].pcila = value; break; case PCIL0_PMM2LA: pci->pmm[2].la = value; break; case PCIL0_PMM2MA: pci->pmm[2].ma = value; break; case PCIL0_PMM2PCIHA: pci->pmm[2].pciha = value; break; case PCIL0_PMM2PCILA: pci->pmm[2].pcila = value; break; case PCIL0_PTM1MS: pci->ptm[0].ms = value; break; case PCIL0_PTM1LA: pci->ptm[0].la = value; break; case PCIL0_PTM2MS: pci->ptm[1].ms = value; break; case PCIL0_PTM2LA: pci->ptm[1].la = value; break; default: printf("%s: unhandled PCI internal register 0x%lx\n", __func__, (unsigned long)offset); break; } } static uint32_t ppc4xx_pci_reg_read4(void *opaque, target_phys_addr_t offset) { struct PPC4xxPCIState *pci = opaque; uint32_t value; switch (offset) { case PCIL0_PMM0LA: value = pci->pmm[0].la; break; case PCIL0_PMM0MA: value = pci->pmm[0].ma; break; case PCIL0_PMM0PCIHA: value = pci->pmm[0].pciha; break; case PCIL0_PMM0PCILA: value = pci->pmm[0].pcila; break; case PCIL0_PMM1LA: value = pci->pmm[1].la; break; case PCIL0_PMM1MA: value = pci->pmm[1].ma; break; case PCIL0_PMM1PCIHA: value = pci->pmm[1].pciha; break; case PCIL0_PMM1PCILA: value = pci->pmm[1].pcila; break; case PCIL0_PMM2LA: value = pci->pmm[2].la; break; case PCIL0_PMM2MA: value = pci->pmm[2].ma; break; case PCIL0_PMM2PCIHA: value = pci->pmm[2].pciha; break; case PCIL0_PMM2PCILA: value = pci->pmm[2].pcila; break; case PCIL0_PTM1MS: value = pci->ptm[0].ms; break; case PCIL0_PTM1LA: value = pci->ptm[0].la; break; case PCIL0_PTM2MS: value = pci->ptm[1].ms; break; case PCIL0_PTM2LA: value = pci->ptm[1].la; break; default: printf("%s: invalid PCI internal register 0x%lx\n", __func__, (unsigned long)offset); value = 0; } return value; } static CPUReadMemoryFunc * const pci_reg_read[] = { &ppc4xx_pci_reg_read4, &ppc4xx_pci_reg_read4, &ppc4xx_pci_reg_read4, }; static CPUWriteMemoryFunc * const pci_reg_write[] = { &ppc4xx_pci_reg_write4, &ppc4xx_pci_reg_write4, &ppc4xx_pci_reg_write4, }; static void ppc4xx_pci_reset(void *opaque) { struct PPC4xxPCIState *pci = opaque; memset(pci->pmm, 0, sizeof(pci->pmm)); memset(pci->ptm, 0, sizeof(pci->ptm)); } /* On Bamboo, all pins from each slot are tied to a single board IRQ. This * may need further refactoring for other boards. */ static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num) { int slot = pci_dev->devfn >> 3; DPRINTF("%s: devfn %x irq %d -> %d\n", __func__, pci_dev->devfn, irq_num, slot); return slot - 1; } static void ppc4xx_pci_set_irq(void *opaque, int irq_num, int level) { qemu_irq *pci_irqs = opaque; DPRINTF("%s: PCI irq %d\n", __func__, irq_num); qemu_set_irq(pci_irqs[irq_num], level); } static void ppc4xx_pci_save(QEMUFile *f, void *opaque) { PPC4xxPCIState *controller = opaque; int i; pci_device_save(controller->pci_dev, f); for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) { qemu_put_be32s(f, &controller->pmm[i].la); qemu_put_be32s(f, &controller->pmm[i].ma); qemu_put_be32s(f, &controller->pmm[i].pcila); qemu_put_be32s(f, &controller->pmm[i].pciha); } for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) { qemu_put_be32s(f, &controller->ptm[i].ms); qemu_put_be32s(f, &controller->ptm[i].la); } } static int ppc4xx_pci_load(QEMUFile *f, void *opaque, int version_id) { PPC4xxPCIState *controller = opaque; int i; if (version_id != 1) return -EINVAL; pci_device_load(controller->pci_dev, f); for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) { qemu_get_be32s(f, &controller->pmm[i].la); qemu_get_be32s(f, &controller->pmm[i].ma); qemu_get_be32s(f, &controller->pmm[i].pcila); qemu_get_be32s(f, &controller->pmm[i].pciha); } for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) { qemu_get_be32s(f, &controller->ptm[i].ms); qemu_get_be32s(f, &controller->ptm[i].la); } return 0; } /* XXX Interrupt acknowledge cycles not supported. */ PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4], target_phys_addr_t config_space, target_phys_addr_t int_ack, target_phys_addr_t special_cycle, target_phys_addr_t registers) { PPC4xxPCIState *controller; int index; static int ppc4xx_pci_id; uint8_t *pci_conf; controller = qemu_mallocz(sizeof(PPC4xxPCIState)); controller->pci_state.bus = pci_register_bus(NULL, "pci", ppc4xx_pci_set_irq, ppc4xx_pci_map_irq, pci_irqs, 0, 4); controller->pci_dev = pci_register_device(controller->pci_state.bus, "host bridge", sizeof(PCIDevice), 0, NULL, NULL); pci_conf = controller->pci_dev->config; pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_IBM); pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_IBM_440GX); pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER); /* CFGADDR */ index = cpu_register_io_memory(pci4xx_cfgaddr_read, pci4xx_cfgaddr_write, controller, DEVICE_LITTLE_ENDIAN); if (index < 0) goto free; cpu_register_physical_memory(config_space + PCIC0_CFGADDR, 4, index); /* CFGDATA */ index = pci_host_data_register_mmio(&controller->pci_state, 1); if (index < 0) goto free; cpu_register_physical_memory(config_space + PCIC0_CFGDATA, 4, index); /* Internal registers */ index = cpu_register_io_memory(pci_reg_read, pci_reg_write, controller, DEVICE_LITTLE_ENDIAN); if (index < 0) goto free; cpu_register_physical_memory(registers, PCI_REG_SIZE, index); qemu_register_reset(ppc4xx_pci_reset, controller); /* XXX load/save code not tested. */ register_savevm(&controller->pci_dev->qdev, "ppc4xx_pci", ppc4xx_pci_id++, 1, ppc4xx_pci_save, ppc4xx_pci_load, controller); return controller->pci_state.bus; free: printf("%s error\n", __func__); qemu_free(controller); return NULL; }