hw/hppa: Implement DINO system board

Now that we have the prerequisites in target/hppa/,
implement the hardware for a PA7100LC.

This also enables build for hppa-softmmu.

Signed-off-by: Helge Deller <deller@gmx.de>
[rth: Since it is all new code, squashed all branch development
withing hw/hppa/ to a single patch.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 518 insertions, 0 deletions

diff --git a/hw/hppa/dino.c b/hw/hppa/dino.c
new file mode 100644
index 0000000..15aefde
--- /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)