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-rw-r--r--hw/pci-host/apb.c542
1 files changed, 542 insertions, 0 deletions
diff --git a/hw/pci-host/apb.c b/hw/pci-host/apb.c
new file mode 100644
index 0000000000..b4981d7005
--- /dev/null
+++ b/hw/pci-host/apb.c
@@ -0,0 +1,542 @@
+/*
+ * QEMU Ultrasparc APB PCI host
+ *
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/* XXX This file and most of its contents are somewhat misnamed. The
+ Ultrasparc PCI host is called the PCI Bus Module (PBM). The APB is
+ the secondary PCI bridge. */
+
+#include "hw/sysbus.h"
+#include "hw/pci/pci.h"
+#include "hw/pci/pci_host.h"
+#include "hw/pci/pci_bridge.h"
+#include "hw/pci/pci_bus.h"
+#include "hw/pci-host/apb.h"
+#include "sysemu/sysemu.h"
+#include "exec/address-spaces.h"
+
+/* debug APB */
+//#define DEBUG_APB
+
+#ifdef DEBUG_APB
+#define APB_DPRINTF(fmt, ...) \
+do { printf("APB: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define APB_DPRINTF(fmt, ...)
+#endif
+
+/*
+ * Chipset docs:
+ * PBM: "UltraSPARC IIi User's Manual",
+ * http://www.sun.com/processors/manuals/805-0087.pdf
+ *
+ * APB: "Advanced PCI Bridge (APB) User's Manual",
+ * http://www.sun.com/processors/manuals/805-1251.pdf
+ */
+
+#define PBM_PCI_IMR_MASK 0x7fffffff
+#define PBM_PCI_IMR_ENABLED 0x80000000
+
+#define POR (1 << 31)
+#define SOFT_POR (1 << 30)
+#define SOFT_XIR (1 << 29)
+#define BTN_POR (1 << 28)
+#define BTN_XIR (1 << 27)
+#define RESET_MASK 0xf8000000
+#define RESET_WCMASK 0x98000000
+#define RESET_WMASK 0x60000000
+
+#define MAX_IVEC 0x30
+
+typedef struct APBState {
+ SysBusDevice busdev;
+ PCIBus *bus;
+ MemoryRegion apb_config;
+ MemoryRegion pci_config;
+ MemoryRegion pci_mmio;
+ MemoryRegion pci_ioport;
+ uint32_t iommu[4];
+ uint32_t pci_control[16];
+ uint32_t pci_irq_map[8];
+ uint32_t obio_irq_map[32];
+ qemu_irq *pbm_irqs;
+ qemu_irq *ivec_irqs;
+ uint32_t reset_control;
+ unsigned int nr_resets;
+} APBState;
+
+static void pci_apb_set_irq(void *opaque, int irq_num, int level);
+
+static void apb_config_writel (void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ APBState *s = opaque;
+
+ APB_DPRINTF("%s: addr " TARGET_FMT_plx " val %" PRIx64 "\n", __func__, addr, val);
+
+ switch (addr & 0xffff) {
+ case 0x30 ... 0x4f: /* DMA error registers */
+ /* XXX: not implemented yet */
+ break;
+ case 0x200 ... 0x20b: /* IOMMU */
+ s->iommu[(addr & 0xf) >> 2] = val;
+ break;
+ case 0x20c ... 0x3ff: /* IOMMU flush */
+ break;
+ case 0xc00 ... 0xc3f: /* PCI interrupt control */
+ if (addr & 4) {
+ s->pci_irq_map[(addr & 0x3f) >> 3] &= PBM_PCI_IMR_MASK;
+ s->pci_irq_map[(addr & 0x3f) >> 3] |= val & ~PBM_PCI_IMR_MASK;
+ }
+ break;
+ case 0x1000 ... 0x1080: /* OBIO interrupt control */
+ if (addr & 4) {
+ s->obio_irq_map[(addr & 0xff) >> 3] &= PBM_PCI_IMR_MASK;
+ s->obio_irq_map[(addr & 0xff) >> 3] |= val & ~PBM_PCI_IMR_MASK;
+ }
+ break;
+ case 0x1400 ... 0x143f: /* PCI interrupt clear */
+ if (addr & 4) {
+ pci_apb_set_irq(s, (addr & 0x3f) >> 3, 0);
+ }
+ break;
+ case 0x1800 ... 0x1860: /* OBIO interrupt clear */
+ if (addr & 4) {
+ pci_apb_set_irq(s, 0x20 | ((addr & 0xff) >> 3), 0);
+ }
+ break;
+ case 0x2000 ... 0x202f: /* PCI control */
+ s->pci_control[(addr & 0x3f) >> 2] = val;
+ break;
+ case 0xf020 ... 0xf027: /* Reset control */
+ if (addr & 4) {
+ val &= RESET_MASK;
+ s->reset_control &= ~(val & RESET_WCMASK);
+ s->reset_control |= val & RESET_WMASK;
+ if (val & SOFT_POR) {
+ s->nr_resets = 0;
+ qemu_system_reset_request();
+ } else if (val & SOFT_XIR) {
+ qemu_system_reset_request();
+ }
+ }
+ break;
+ case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
+ case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
+ case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
+ case 0xf000 ... 0xf01f: /* FFB config, memory control */
+ /* we don't care */
+ default:
+ break;
+ }
+}
+
+static uint64_t apb_config_readl (void *opaque,
+ hwaddr addr, unsigned size)
+{
+ APBState *s = opaque;
+ uint32_t val;
+
+ switch (addr & 0xffff) {
+ case 0x30 ... 0x4f: /* DMA error registers */
+ val = 0;
+ /* XXX: not implemented yet */
+ break;
+ case 0x200 ... 0x20b: /* IOMMU */
+ val = s->iommu[(addr & 0xf) >> 2];
+ break;
+ case 0x20c ... 0x3ff: /* IOMMU flush */
+ val = 0;
+ break;
+ case 0xc00 ... 0xc3f: /* PCI interrupt control */
+ if (addr & 4) {
+ val = s->pci_irq_map[(addr & 0x3f) >> 3];
+ } else {
+ val = 0;
+ }
+ break;
+ case 0x1000 ... 0x1080: /* OBIO interrupt control */
+ if (addr & 4) {
+ val = s->obio_irq_map[(addr & 0xff) >> 3];
+ } else {
+ val = 0;
+ }
+ break;
+ case 0x2000 ... 0x202f: /* PCI control */
+ val = s->pci_control[(addr & 0x3f) >> 2];
+ break;
+ case 0xf020 ... 0xf027: /* Reset control */
+ if (addr & 4) {
+ val = s->reset_control;
+ } else {
+ val = 0;
+ }
+ break;
+ case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
+ case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
+ case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
+ case 0xf000 ... 0xf01f: /* FFB config, memory control */
+ /* we don't care */
+ default:
+ val = 0;
+ break;
+ }
+ APB_DPRINTF("%s: addr " TARGET_FMT_plx " -> %x\n", __func__, addr, val);
+
+ return val;
+}
+
+static const MemoryRegionOps apb_config_ops = {
+ .read = apb_config_readl,
+ .write = apb_config_writel,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void apb_pci_config_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ APBState *s = opaque;
+
+ val = qemu_bswap_len(val, size);
+ APB_DPRINTF("%s: addr " TARGET_FMT_plx " val %" PRIx64 "\n", __func__, addr, val);
+ pci_data_write(s->bus, addr, val, size);
+}
+
+static uint64_t apb_pci_config_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ uint32_t ret;
+ APBState *s = opaque;
+
+ ret = pci_data_read(s->bus, addr, size);
+ ret = qemu_bswap_len(ret, size);
+ APB_DPRINTF("%s: addr " TARGET_FMT_plx " -> %x\n", __func__, addr, ret);
+ return ret;
+}
+
+static void pci_apb_iowriteb (void *opaque, hwaddr addr,
+ uint32_t val)
+{
+ cpu_outb(addr & IOPORTS_MASK, val);
+}
+
+static void pci_apb_iowritew (void *opaque, hwaddr addr,
+ uint32_t val)
+{
+ cpu_outw(addr & IOPORTS_MASK, bswap16(val));
+}
+
+static void pci_apb_iowritel (void *opaque, hwaddr addr,
+ uint32_t val)
+{
+ cpu_outl(addr & IOPORTS_MASK, bswap32(val));
+}
+
+static uint32_t pci_apb_ioreadb (void *opaque, hwaddr addr)
+{
+ uint32_t val;
+
+ val = cpu_inb(addr & IOPORTS_MASK);
+ return val;
+}
+
+static uint32_t pci_apb_ioreadw (void *opaque, hwaddr addr)
+{
+ uint32_t val;
+
+ val = bswap16(cpu_inw(addr & IOPORTS_MASK));
+ return val;
+}
+
+static uint32_t pci_apb_ioreadl (void *opaque, hwaddr addr)
+{
+ uint32_t val;
+
+ val = bswap32(cpu_inl(addr & IOPORTS_MASK));
+ return val;
+}
+
+static const MemoryRegionOps pci_ioport_ops = {
+ .old_mmio = {
+ .read = { pci_apb_ioreadb, pci_apb_ioreadw, pci_apb_ioreadl },
+ .write = { pci_apb_iowriteb, pci_apb_iowritew, pci_apb_iowritel, },
+ },
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+/* The APB host has an IRQ line for each IRQ line of each slot. */
+static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
+{
+ return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
+}
+
+static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
+{
+ int bus_offset;
+ if (pci_dev->devfn & 1)
+ bus_offset = 16;
+ else
+ bus_offset = 0;
+ return bus_offset + irq_num;
+}
+
+static void pci_apb_set_irq(void *opaque, int irq_num, int level)
+{
+ APBState *s = opaque;
+
+ /* PCI IRQ map onto the first 32 INO. */
+ if (irq_num < 32) {
+ if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) {
+ APB_DPRINTF("%s: set irq %d level %d\n", __func__, irq_num, level);
+ qemu_set_irq(s->ivec_irqs[irq_num], level);
+ } else {
+ APB_DPRINTF("%s: not enabled: lower irq %d\n", __func__, irq_num);
+ qemu_irq_lower(s->ivec_irqs[irq_num]);
+ }
+ } else {
+ /* OBIO IRQ map onto the next 16 INO. */
+ if (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED) {
+ APB_DPRINTF("%s: set irq %d level %d\n", __func__, irq_num, level);
+ qemu_set_irq(s->ivec_irqs[irq_num], level);
+ } else {
+ APB_DPRINTF("%s: not enabled: lower irq %d\n", __func__, irq_num);
+ qemu_irq_lower(s->ivec_irqs[irq_num]);
+ }
+ }
+}
+
+static int apb_pci_bridge_initfn(PCIDevice *dev)
+{
+ int rc;
+
+ rc = pci_bridge_initfn(dev, TYPE_PCI_BUS);
+ if (rc < 0) {
+ return rc;
+ }
+
+ /*
+ * command register:
+ * According to PCI bridge spec, after reset
+ * bus master bit is off
+ * memory space enable bit is off
+ * According to manual (805-1251.pdf).
+ * the reset value should be zero unless the boot pin is tied high
+ * (which is true) and thus it should be PCI_COMMAND_MEMORY.
+ */
+ pci_set_word(dev->config + PCI_COMMAND,
+ PCI_COMMAND_MEMORY);
+ pci_set_word(dev->config + PCI_STATUS,
+ PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
+ PCI_STATUS_DEVSEL_MEDIUM);
+ return 0;
+}
+
+PCIBus *pci_apb_init(hwaddr special_base,
+ hwaddr mem_base,
+ qemu_irq *ivec_irqs, PCIBus **bus2, PCIBus **bus3,
+ qemu_irq **pbm_irqs)
+{
+ DeviceState *dev;
+ SysBusDevice *s;
+ APBState *d;
+ PCIDevice *pci_dev;
+ PCIBridge *br;
+
+ /* Ultrasparc PBM main bus */
+ dev = qdev_create(NULL, "pbm");
+ qdev_init_nofail(dev);
+ s = SYS_BUS_DEVICE(dev);
+ /* apb_config */
+ sysbus_mmio_map(s, 0, special_base);
+ /* PCI configuration space */
+ sysbus_mmio_map(s, 1, special_base + 0x1000000ULL);
+ /* pci_ioport */
+ sysbus_mmio_map(s, 2, special_base + 0x2000000ULL);
+ d = FROM_SYSBUS(APBState, s);
+
+ memory_region_init(&d->pci_mmio, "pci-mmio", 0x100000000ULL);
+ memory_region_add_subregion(get_system_memory(), mem_base, &d->pci_mmio);
+
+ d->bus = pci_register_bus(&d->busdev.qdev, "pci",
+ pci_apb_set_irq, pci_pbm_map_irq, d,
+ &d->pci_mmio,
+ get_system_io(),
+ 0, 32, TYPE_PCI_BUS);
+
+ *pbm_irqs = d->pbm_irqs;
+ d->ivec_irqs = ivec_irqs;
+
+ pci_create_simple(d->bus, 0, "pbm-pci");
+
+ /* APB secondary busses */
+ pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 0), true,
+ "pbm-bridge");
+ br = DO_UPCAST(PCIBridge, dev, pci_dev);
+ pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 1",
+ pci_apb_map_irq);
+ qdev_init_nofail(&pci_dev->qdev);
+ *bus2 = pci_bridge_get_sec_bus(br);
+
+ pci_dev = pci_create_multifunction(d->bus, PCI_DEVFN(1, 1), true,
+ "pbm-bridge");
+ br = DO_UPCAST(PCIBridge, dev, pci_dev);
+ pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 2",
+ pci_apb_map_irq);
+ qdev_init_nofail(&pci_dev->qdev);
+ *bus3 = pci_bridge_get_sec_bus(br);
+
+ return d->bus;
+}
+
+static void pci_pbm_reset(DeviceState *d)
+{
+ unsigned int i;
+ APBState *s = container_of(d, APBState, busdev.qdev);
+
+ for (i = 0; i < 8; i++) {
+ s->pci_irq_map[i] &= PBM_PCI_IMR_MASK;
+ }
+ for (i = 0; i < 32; i++) {
+ s->obio_irq_map[i] &= PBM_PCI_IMR_MASK;
+ }
+
+ if (s->nr_resets++ == 0) {
+ /* Power on reset */
+ s->reset_control = POR;
+ }
+}
+
+static const MemoryRegionOps pci_config_ops = {
+ .read = apb_pci_config_read,
+ .write = apb_pci_config_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static int pci_pbm_init_device(SysBusDevice *dev)
+{
+ APBState *s;
+ unsigned int i;
+
+ s = FROM_SYSBUS(APBState, dev);
+ for (i = 0; i < 8; i++) {
+ s->pci_irq_map[i] = (0x1f << 6) | (i << 2);
+ }
+ for (i = 0; i < 32; i++) {
+ s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i;
+ }
+ s->pbm_irqs = qemu_allocate_irqs(pci_apb_set_irq, s, MAX_IVEC);
+
+ /* apb_config */
+ memory_region_init_io(&s->apb_config, &apb_config_ops, s, "apb-config",
+ 0x10000);
+ /* at region 0 */
+ sysbus_init_mmio(dev, &s->apb_config);
+
+ memory_region_init_io(&s->pci_config, &pci_config_ops, s, "apb-pci-config",
+ 0x1000000);
+ /* at region 1 */
+ sysbus_init_mmio(dev, &s->pci_config);
+
+ /* pci_ioport */
+ memory_region_init_io(&s->pci_ioport, &pci_ioport_ops, s,
+ "apb-pci-ioport", 0x10000);
+ /* at region 2 */
+ sysbus_init_mmio(dev, &s->pci_ioport);
+
+ return 0;
+}
+
+static int pbm_pci_host_init(PCIDevice *d)
+{
+ pci_set_word(d->config + PCI_COMMAND,
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+ pci_set_word(d->config + PCI_STATUS,
+ PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
+ PCI_STATUS_DEVSEL_MEDIUM);
+ return 0;
+}
+
+static void pbm_pci_host_class_init(ObjectClass *klass, void *data)
+{
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = pbm_pci_host_init;
+ k->vendor_id = PCI_VENDOR_ID_SUN;
+ k->device_id = PCI_DEVICE_ID_SUN_SABRE;
+ k->class_id = PCI_CLASS_BRIDGE_HOST;
+}
+
+static const TypeInfo pbm_pci_host_info = {
+ .name = "pbm-pci",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(PCIDevice),
+ .class_init = pbm_pci_host_class_init,
+};
+
+static void pbm_host_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = pci_pbm_init_device;
+ dc->reset = pci_pbm_reset;
+}
+
+static const TypeInfo pbm_host_info = {
+ .name = "pbm",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(APBState),
+ .class_init = pbm_host_class_init,
+};
+
+static void pbm_pci_bridge_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = apb_pci_bridge_initfn;
+ k->exit = pci_bridge_exitfn;
+ k->vendor_id = PCI_VENDOR_ID_SUN;
+ k->device_id = PCI_DEVICE_ID_SUN_SIMBA;
+ k->revision = 0x11;
+ k->config_write = pci_bridge_write_config;
+ k->is_bridge = 1;
+ dc->reset = pci_bridge_reset;
+ dc->vmsd = &vmstate_pci_device;
+}
+
+static const TypeInfo pbm_pci_bridge_info = {
+ .name = "pbm-bridge",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(PCIBridge),
+ .class_init = pbm_pci_bridge_class_init,
+};
+
+static void pbm_register_types(void)
+{
+ type_register_static(&pbm_host_info);
+ type_register_static(&pbm_pci_host_info);
+ type_register_static(&pbm_pci_bridge_info);
+}
+
+type_init(pbm_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-24 00:59:37 +0000