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qemu/hw/ppc4xx_pci.c

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/*
* 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"
#include "exec-memory.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 {
PCIHostState pci_state;
struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
qemu_irq irq[4];
MemoryRegion container;
MemoryRegion iomem;
};
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_BASE 0x800000
#define PCI_REG_SIZE 0x40
#define PCI_ALL_SIZE (PCI_REG_BASE + PCI_REG_SIZE)
static uint64_t pci4xx_cfgaddr_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
PPC4xxPCIState *ppc4xx_pci = opaque;
return ppc4xx_pci->pci_state.config_reg;
}
static void pci4xx_cfgaddr_write(void *opaque, target_phys_addr_t addr,
uint64_t value, unsigned size)
{
PPC4xxPCIState *ppc4xx_pci = opaque;
ppc4xx_pci->pci_state.config_reg = value & ~0x3;
}
static const MemoryRegionOps pci4xx_cfgaddr_ops = {
.read = pci4xx_cfgaddr_read,
.write = pci4xx_cfgaddr_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void ppc4xx_pci_reg_write4(void *opaque, target_phys_addr_t offset,
uint64_t value, unsigned size)
{
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 uint64_t ppc4xx_pci_reg_read4(void *opaque, target_phys_addr_t offset,
unsigned size)
{
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 const MemoryRegionOps pci_reg_ops = {
.read = ppc4xx_pci_reg_read4,
.write = ppc4xx_pci_reg_write4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
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);
if (irq_num < 0) {
fprintf(stderr, "%s: PCI irq %d\n", __func__, irq_num);
return;
}
qemu_set_irq(pci_irqs[irq_num], level);
}
static const VMStateDescription vmstate_pci_master_map = {
.name = "pci_master_map",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT32(la, struct PCIMasterMap),
VMSTATE_UINT32(ma, struct PCIMasterMap),
VMSTATE_UINT32(pcila, struct PCIMasterMap),
VMSTATE_UINT32(pciha, struct PCIMasterMap),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_pci_target_map = {
.name = "pci_target_map",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT32(ms, struct PCITargetMap),
VMSTATE_UINT32(la, struct PCITargetMap),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_ppc4xx_pci = {
.name = "ppc4xx_pci",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT_ARRAY(pmm, PPC4xxPCIState, PPC4xx_PCI_NR_PMMS, 1,
vmstate_pci_master_map,
struct PCIMasterMap),
VMSTATE_STRUCT_ARRAY(ptm, PPC4xxPCIState, PPC4xx_PCI_NR_PTMS, 1,
vmstate_pci_target_map,
struct PCITargetMap),
VMSTATE_END_OF_LIST()
}
};
/* XXX Interrupt acknowledge cycles not supported. */
static int ppc4xx_pcihost_initfn(SysBusDevice *dev)
{
PPC4xxPCIState *s;
PCIHostState *h;
PCIBus *b;
int i;
h = FROM_SYSBUS(PCIHostState, sysbus_from_qdev(dev));
s = DO_UPCAST(PPC4xxPCIState, pci_state, h);
for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
sysbus_init_irq(dev, &s->irq[i]);
}
b = pci_register_bus(&s->pci_state.busdev.qdev, NULL, ppc4xx_pci_set_irq,
ppc4xx_pci_map_irq, s->irq, get_system_memory(),
get_system_io(), 0, 4);
s->pci_state.bus = b;
pci_create_simple(b, 0, "ppc4xx-host-bridge");
/* XXX split into 2 memory regions, one for config space, one for regs */
memory_region_init(&s->container, "pci-container", PCI_ALL_SIZE);
memory_region_init_io(&h->conf_mem, &pci_host_conf_le_ops, h,
"pci-conf-idx", 4);
memory_region_init_io(&h->data_mem, &pci_host_data_le_ops, h,
"pci-conf-data", 4);
memory_region_init_io(&s->iomem, &pci_reg_ops, s,
"pci.reg", PCI_REG_SIZE);
memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem);
memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem);
memory_region_add_subregion(&s->container, PCI_REG_BASE, &s->iomem);
sysbus_init_mmio(dev, &s->container);
qemu_register_reset(ppc4xx_pci_reset, s);
return 0;
}
static void ppc4xx_host_bridge_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Host bridge";
k->vendor_id = PCI_VENDOR_ID_IBM;
k->device_id = PCI_DEVICE_ID_IBM_440GX;
k->class_id = PCI_CLASS_BRIDGE_OTHER;
}
static TypeInfo ppc4xx_host_bridge_info = {
.name = "ppc4xx-host-bridge",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIDevice),
.class_init = ppc4xx_host_bridge_class_init,
};
static void ppc4xx_pcihost_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->init = ppc4xx_pcihost_initfn;
dc->vmsd = &vmstate_ppc4xx_pci;
}
static TypeInfo ppc4xx_pcihost_info = {
.name = "ppc4xx-pcihost",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(PPC4xxPCIState),
.class_init = ppc4xx_pcihost_class_init,
};
static void ppc4xx_pci_register_types(void)
{
type_register_static(&ppc4xx_pcihost_info);
type_register_static(&ppc4xx_host_bridge_info);
}
type_init(ppc4xx_pci_register_types)
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