diff options
Diffstat (limited to 'hw/hppa/dino.c')
| -rw-r--r-- | hw/hppa/dino.c | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/hw/hppa/dino.c b/hw/hppa/dino.c new file mode 100644 index 0000000000..15aefde09c --- /dev/null +++ b/hw/hppa/dino.c @@ -0,0 +1,518 @@ +/* + * HP-PARISC Dino PCI chipset emulation. + * + * (C) 2017 by Helge Deller <deller@gmx.de> + * + * This work is licensed under the GNU GPL license version 2 or later. + * + * Documentation available at: + * https://parisc.wiki.kernel.org/images-parisc/9/91/Dino_ers.pdf + * https://parisc.wiki.kernel.org/images-parisc/7/70/Dino_3_1_Errata.pdf + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "cpu.h" +#include "hw/hw.h" +#include "hw/devices.h" +#include "sysemu/sysemu.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_bus.h" +#include "hppa_sys.h" +#include "exec/address-spaces.h" + + +#define TYPE_DINO_PCI_HOST_BRIDGE "dino-pcihost" + +#define DINO_IAR0 0x004 +#define DINO_IODC 0x008 +#define DINO_IRR0 0x00C /* RO */ +#define DINO_IAR1 0x010 +#define DINO_IRR1 0x014 /* RO */ +#define DINO_IMR 0x018 +#define DINO_IPR 0x01C +#define DINO_TOC_ADDR 0x020 +#define DINO_ICR 0x024 +#define DINO_ILR 0x028 /* RO */ +#define DINO_IO_COMMAND 0x030 /* WO */ +#define DINO_IO_STATUS 0x034 /* RO */ +#define DINO_IO_CONTROL 0x038 +#define DINO_IO_GSC_ERR_RESP 0x040 /* RO */ +#define DINO_IO_ERR_INFO 0x044 /* RO */ +#define DINO_IO_PCI_ERR_RESP 0x048 /* RO */ +#define DINO_IO_FBB_EN 0x05c +#define DINO_IO_ADDR_EN 0x060 +#define DINO_PCI_CONFIG_ADDR 0x064 +#define DINO_PCI_CONFIG_DATA 0x068 +#define DINO_PCI_IO_DATA 0x06c +#define DINO_PCI_MEM_DATA 0x070 /* Dino 3.x only */ +#define DINO_GSC2X_CONFIG 0x7b4 /* RO */ +#define DINO_GMASK 0x800 +#define DINO_PAMR 0x804 +#define DINO_PAPR 0x808 +#define DINO_DAMODE 0x80c +#define DINO_PCICMD 0x810 +#define DINO_PCISTS 0x814 /* R/WC */ +#define DINO_MLTIM 0x81c +#define DINO_BRDG_FEAT 0x820 +#define DINO_PCIROR 0x824 +#define DINO_PCIWOR 0x828 +#define DINO_TLTIM 0x830 + +#define DINO_IRQS 11 /* bits 0-10 are architected */ +#define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ +#define DINO_LOCAL_IRQS (DINO_IRQS + 1) +#define DINO_MASK_IRQ(x) (1 << (x)) + +#define PCIINTA 0x001 +#define PCIINTB 0x002 +#define PCIINTC 0x004 +#define PCIINTD 0x008 +#define PCIINTE 0x010 +#define PCIINTF 0x020 +#define GSCEXTINT 0x040 +/* #define xxx 0x080 - bit 7 is "default" */ +/* #define xxx 0x100 - bit 8 not used */ +/* #define xxx 0x200 - bit 9 not used */ +#define RS232INT 0x400 + +#define DINO_MEM_CHUNK_SIZE (8 * 1024 * 1024) /* 8MB */ + +#define DINO_PCI_HOST_BRIDGE(obj) \ + OBJECT_CHECK(DinoState, (obj), TYPE_DINO_PCI_HOST_BRIDGE) + +typedef struct DinoState { + PCIHostState parent_obj; + + /* PCI_CONFIG_ADDR is parent_obj.config_reg, via pci_host_conf_be_ops, + so that we can map PCI_CONFIG_DATA to pci_host_data_be_ops. */ + + uint32_t iar0; + uint32_t iar1; + uint32_t imr; + uint32_t ipr; + uint32_t icr; + uint32_t ilr; + uint32_t io_addr_en; + uint32_t io_control; + + MemoryRegion this_mem; + MemoryRegion pci_mem; + MemoryRegion pci_mem_alias[32]; + + AddressSpace bm_as; + MemoryRegion bm; + MemoryRegion bm_ram_alias; + MemoryRegion bm_pci_alias; + + MemoryRegion cpu0_eir_mem; +} DinoState; + +/* + * Dino can forward memory accesses from the CPU in the range between + * 0xf0800000 and 0xff000000 to the PCI bus. + */ +static void gsc_to_pci_forwarding(DinoState *s) +{ + uint32_t io_addr_en, tmp; + int enabled, i; + + tmp = extract32(s->io_control, 7, 2); + enabled = (tmp == 0x01); + io_addr_en = s->io_addr_en; + + memory_region_transaction_begin(); + for (i = 1; i < 31; i++) { + MemoryRegion *mem = &s->pci_mem_alias[i]; + if (enabled && (io_addr_en & (1U << i))) { + if (!memory_region_is_mapped(mem)) { + uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; + memory_region_add_subregion(get_system_memory(), addr, mem); + } + } else if (memory_region_is_mapped(mem)) { + memory_region_del_subregion(get_system_memory(), mem); + } + } + memory_region_transaction_commit(); +} + +static bool dino_chip_mem_valid(void *opaque, hwaddr addr, + unsigned size, bool is_write) +{ + switch (addr) { + case DINO_IAR0: + case DINO_IAR1: + case DINO_IRR0: + case DINO_IRR1: + case DINO_IMR: + case DINO_IPR: + case DINO_ICR: + case DINO_ILR: + case DINO_IO_CONTROL: + case DINO_IO_ADDR_EN: + case DINO_PCI_IO_DATA: + return true; + case DINO_PCI_IO_DATA + 2: + return size <= 2; + case DINO_PCI_IO_DATA + 1: + case DINO_PCI_IO_DATA + 3: + return size == 1; + } + return false; +} + +static MemTxResult dino_chip_read_with_attrs(void *opaque, hwaddr addr, + uint64_t *data, unsigned size, + MemTxAttrs attrs) +{ + DinoState *s = opaque; + MemTxResult ret = MEMTX_OK; + AddressSpace *io; + uint16_t ioaddr; + uint32_t val; + + switch (addr) { + case DINO_PCI_IO_DATA ... DINO_PCI_IO_DATA + 3: + /* Read from PCI IO space. */ + io = &address_space_io; + ioaddr = s->parent_obj.config_reg; + switch (size) { + case 1: + val = address_space_ldub(io, ioaddr, attrs, &ret); + break; + case 2: + val = address_space_lduw_be(io, ioaddr, attrs, &ret); + break; + case 4: + val = address_space_ldl_be(io, ioaddr, attrs, &ret); + break; + default: + g_assert_not_reached(); + } + break; + + case DINO_IO_ADDR_EN: + val = s->io_addr_en; + break; + case DINO_IO_CONTROL: + val = s->io_control; + break; + + case DINO_IAR0: + val = s->iar0; + break; + case DINO_IAR1: + val = s->iar1; + break; + case DINO_IMR: + val = s->imr; + break; + case DINO_ICR: + val = s->icr; + break; + case DINO_IPR: + val = s->ipr; + /* Any read to IPR clears the register. */ + s->ipr = 0; + break; + case DINO_ILR: + val = s->ilr; + break; + case DINO_IRR0: + val = s->ilr & s->imr & ~s->icr; + break; + case DINO_IRR1: + val = s->ilr & s->imr & s->icr; + break; + + default: + /* Controlled by dino_chip_mem_valid above. */ + g_assert_not_reached(); + } + + *data = val; + return ret; +} + +static MemTxResult dino_chip_write_with_attrs(void *opaque, hwaddr addr, + uint64_t val, unsigned size, + MemTxAttrs attrs) +{ + DinoState *s = opaque; + AddressSpace *io; + MemTxResult ret; + uint16_t ioaddr; + + switch (addr) { + case DINO_IO_DATA ... DINO_PCI_IO_DATA + 3: + /* Write into PCI IO space. */ + io = &address_space_io; + ioaddr = s->parent_obj.config_reg; + switch (size) { + case 1: + address_space_stb(io, ioaddr, val, attrs, &ret); + break; + case 2: + address_space_stw_be(io, ioaddr, val, attrs, &ret); + break; + case 4: + address_space_stl_be(io, ioaddr, val, attrs, &ret); + break; + default: + g_assert_not_reached(); + } + return ret; + + case DINO_IO_ADDR_EN: + /* Never allow first (=firmware) and last (=Dino) areas. */ + s->io_addr_en = val & 0x7ffffffe; + gsc_to_pci_forwarding(s); + break; + case DINO_IO_CONTROL: + s->io_control = val; + gsc_to_pci_forwarding(s); + break; + + case DINO_IAR0: + s->iar0 = val; + break; + case DINO_IAR1: + s->iar1 = val; + break; + case DINO_IMR: + s->imr = val; + break; + case DINO_ICR: + s->icr = val; + break; + case DINO_IPR: + /* Any write to IPR clears the register. */ + s->ipr = 0; + break; + + case DINO_ILR: + case DINO_IRR0: + case DINO_IRR1: + /* These registers are read-only. */ + break; + + default: + /* Controlled by dino_chip_mem_valid above. */ + g_assert_not_reached(); + } + return MEMTX_OK; +} + +static const MemoryRegionOps dino_chip_ops = { + .read_with_attrs = dino_chip_read_with_attrs, + .write_with_attrs = dino_chip_write_with_attrs, + .endianness = DEVICE_BIG_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 4, + .accepts = dino_chip_mem_valid, + }, + .impl = { + .min_access_size = 1, + .max_access_size = 4, + }, +}; + +static const VMStateDescription vmstate_dino = { + .name = "Dino", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(iar0, DinoState), + VMSTATE_UINT32(iar1, DinoState), + VMSTATE_UINT32(imr, DinoState), + VMSTATE_UINT32(ipr, DinoState), + VMSTATE_UINT32(icr, DinoState), + VMSTATE_UINT32(ilr, DinoState), + VMSTATE_UINT32(io_addr_en, DinoState), + VMSTATE_UINT32(io_control, DinoState), + VMSTATE_END_OF_LIST() + } +}; + + +/* Unlike pci_config_data_le_ops, no check of high bit set in config_reg. */ + +static uint64_t dino_config_data_read(void *opaque, hwaddr addr, unsigned len) +{ + PCIHostState *s = opaque; + return pci_data_read(s->bus, s->config_reg | (addr & 3), len); +} + +static void dino_config_data_write(void *opaque, hwaddr addr, + uint64_t val, unsigned len) +{ + PCIHostState *s = opaque; + pci_data_write(s->bus, s->config_reg | (addr & 3), val, len); +} + +static const MemoryRegionOps dino_config_data_ops = { + .read = dino_config_data_read, + .write = dino_config_data_write, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static AddressSpace *dino_pcihost_set_iommu(PCIBus *bus, void *opaque, + int devfn) +{ + DinoState *s = opaque; + + return &s->bm_as; +} + +/* + * Dino interrupts are connected as shown on Page 78, Table 23 + * (Little-endian bit numbers) + * 0 PCI INTA + * 1 PCI INTB + * 2 PCI INTC + * 3 PCI INTD + * 4 PCI INTE + * 5 PCI INTF + * 6 GSC External Interrupt + * 7 Bus Error for "less than fatal" mode + * 8 PS2 + * 9 Unused + * 10 RS232 + */ + +static void dino_set_irq(void *opaque, int irq, int level) +{ + DinoState *s = opaque; + uint32_t bit = 1u << irq; + uint32_t old_ilr = s->ilr; + + if (level) { + uint32_t ena = bit & ~old_ilr; + s->ipr |= ena; + s->ilr = old_ilr | bit; + if (ena & s->imr) { + uint32_t iar = (ena & s->icr ? s->iar1 : s->iar0); + stl_be_phys(&address_space_memory, iar & -32, iar & 31); + } + } else { + s->ilr = old_ilr & ~bit; + } +} + +static int dino_pci_map_irq(PCIDevice *d, int irq_num) +{ + int slot = d->devfn >> 3; + int local_irq; + + assert(irq_num >= 0 && irq_num <= 3); + + local_irq = slot & 0x03; + + return local_irq; +} + +static void dino_set_timer_irq(void *opaque, int irq, int level) +{ + /* ??? Not connected. */ +} + +static void dino_set_serial_irq(void *opaque, int irq, int level) +{ + dino_set_irq(opaque, 10, level); +} + +PCIBus *dino_init(MemoryRegion *addr_space, + qemu_irq *p_rtc_irq, qemu_irq *p_ser_irq) +{ + DeviceState *dev; + DinoState *s; + PCIBus *b; + int i; + + dev = qdev_create(NULL, TYPE_DINO_PCI_HOST_BRIDGE); + s = DINO_PCI_HOST_BRIDGE(dev); + + /* Dino PCI access from main memory. */ + memory_region_init_io(&s->this_mem, OBJECT(s), &dino_chip_ops, + s, "dino", 4096); + memory_region_add_subregion(addr_space, DINO_HPA, &s->this_mem); + + /* Dino PCI config. */ + memory_region_init_io(&s->parent_obj.conf_mem, OBJECT(&s->parent_obj), + &pci_host_conf_be_ops, dev, "pci-conf-idx", 4); + memory_region_init_io(&s->parent_obj.data_mem, OBJECT(&s->parent_obj), + &dino_config_data_ops, dev, "pci-conf-data", 4); + memory_region_add_subregion(&s->this_mem, DINO_PCI_CONFIG_ADDR, + &s->parent_obj.conf_mem); + memory_region_add_subregion(&s->this_mem, DINO_CONFIG_DATA, + &s->parent_obj.data_mem); + + /* Dino PCI bus memory. */ + memory_region_init(&s->pci_mem, OBJECT(s), "pci-memory", 1ull << 32); + + b = pci_register_root_bus(dev, "pci", dino_set_irq, dino_pci_map_irq, s, + &s->pci_mem, get_system_io(), + PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS); + s->parent_obj.bus = b; + qdev_init_nofail(dev); + + /* Set up windows into PCI bus memory. */ + for (i = 1; i < 31; i++) { + uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; + char *name = g_strdup_printf("PCI Outbound Window %d", i); + memory_region_init_alias(&s->pci_mem_alias[i], OBJECT(s), + name, &s->pci_mem, addr, + DINO_MEM_CHUNK_SIZE); + } + + /* Set up PCI view of memory: Bus master address space. */ + memory_region_init(&s->bm, OBJECT(s), "bm-dino", 1ull << 32); + memory_region_init_alias(&s->bm_ram_alias, OBJECT(s), + "bm-system", addr_space, 0, + 0xf0000000 + DINO_MEM_CHUNK_SIZE); + memory_region_init_alias(&s->bm_pci_alias, OBJECT(s), + "bm-pci", &s->pci_mem, + 0xf0000000 + DINO_MEM_CHUNK_SIZE, + 31 * DINO_MEM_CHUNK_SIZE); + memory_region_add_subregion(&s->bm, 0, + &s->bm_ram_alias); + memory_region_add_subregion(&s->bm, + 0xf0000000 + DINO_MEM_CHUNK_SIZE, + &s->bm_pci_alias); + address_space_init(&s->bm_as, &s->bm, "pci-bm"); + pci_setup_iommu(b, dino_pcihost_set_iommu, s); + + *p_rtc_irq = qemu_allocate_irq(dino_set_timer_irq, s, 0); + *p_ser_irq = qemu_allocate_irq(dino_set_serial_irq, s, 0); + + return b; +} + +static int dino_pcihost_init(SysBusDevice *dev) +{ + return 0; +} + +static void dino_pcihost_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->init = dino_pcihost_init; + dc->vmsd = &vmstate_dino; +} + +static const TypeInfo dino_pcihost_info = { + .name = TYPE_DINO_PCI_HOST_BRIDGE, + .parent = TYPE_PCI_HOST_BRIDGE, + .instance_size = sizeof(DinoState), + .class_init = dino_pcihost_class_init, +}; + +static void dino_register_types(void) +{ + type_register_static(&dino_pcihost_info); +} + +type_init(dino_register_types) |