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qemu-e2k/hw/ppce500_pci.c
Alexander Graf a1bc20dfbb PPC: e500: Map PIO space into core memory region 
On PPC, we don't have PIO. So usually PIO space behind a PCI bridge is
accessible via MMIO. Do this mapping explicitly by mapping the PIO space
of our PCI bus into a memory region that lives in memory space.

Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-29 11:45:56 +01:00

394 lines
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/*
* QEMU PowerPC E500 embedded processors pci controller emulation
*
* Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, <yu.liu@freescale.com>
*
* This file is derived from hw/ppc4xx_pci.c,
* the copyright for that material belongs to the original owners.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include "hw.h"
#include "pci.h"
#include "pci_host.h"
#include "bswap.h"
#ifdef DEBUG_PCI
#define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
#else
#define pci_debug(fmt, ...)
#endif
#define PCIE500_CFGADDR 0x0
#define PCIE500_CFGDATA 0x4
#define PCIE500_REG_BASE 0xC00
#define PCIE500_ALL_SIZE 0x1000
#define PCIE500_REG_SIZE (PCIE500_ALL_SIZE - PCIE500_REG_BASE)
#define PCIE500_PCI_IOLEN 0x10000ULL
#define PPCE500_PCI_CONFIG_ADDR 0x0
#define PPCE500_PCI_CONFIG_DATA 0x4
#define PPCE500_PCI_INTACK 0x8
#define PPCE500_PCI_OW1 (0xC20 - PCIE500_REG_BASE)
#define PPCE500_PCI_OW2 (0xC40 - PCIE500_REG_BASE)
#define PPCE500_PCI_OW3 (0xC60 - PCIE500_REG_BASE)
#define PPCE500_PCI_OW4 (0xC80 - PCIE500_REG_BASE)
#define PPCE500_PCI_IW3 (0xDA0 - PCIE500_REG_BASE)
#define PPCE500_PCI_IW2 (0xDC0 - PCIE500_REG_BASE)
#define PPCE500_PCI_IW1 (0xDE0 - PCIE500_REG_BASE)
#define PPCE500_PCI_GASKET_TIMR (0xE20 - PCIE500_REG_BASE)
#define PCI_POTAR 0x0
#define PCI_POTEAR 0x4
#define PCI_POWBAR 0x8
#define PCI_POWAR 0x10
#define PCI_PITAR 0x0
#define PCI_PIWBAR 0x8
#define PCI_PIWBEAR 0xC
#define PCI_PIWAR 0x10
#define PPCE500_PCI_NR_POBS 5
#define PPCE500_PCI_NR_PIBS 3
struct pci_outbound {
uint32_t potar;
uint32_t potear;
uint32_t powbar;
uint32_t powar;
};
struct pci_inbound {
uint32_t pitar;
uint32_t piwbar;
uint32_t piwbear;
uint32_t piwar;
};
#define TYPE_PPC_E500_PCI_HOST_BRIDGE "e500-pcihost"
#define PPC_E500_PCI_HOST_BRIDGE(obj) \
OBJECT_CHECK(PPCE500PCIState, (obj), TYPE_PPC_E500_PCI_HOST_BRIDGE)
struct PPCE500PCIState {
PCIHostState parent_obj;
struct pci_outbound pob[PPCE500_PCI_NR_POBS];
struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
uint32_t gasket_time;
qemu_irq irq[4];
/* mmio maps */
MemoryRegion container;
MemoryRegion iomem;
MemoryRegion pio;
};
typedef struct PPCE500PCIState PPCE500PCIState;
static uint64_t pci_reg_read4(void *opaque, hwaddr addr,
unsigned size)
{
PPCE500PCIState *pci = opaque;
unsigned long win;
uint32_t value = 0;
int idx;
win = addr & 0xfe0;
switch (win) {
case PPCE500_PCI_OW1:
case PPCE500_PCI_OW2:
case PPCE500_PCI_OW3:
case PPCE500_PCI_OW4:
idx = (addr >> 5) & 0x7;
switch (addr & 0xC) {
case PCI_POTAR:
value = pci->pob[idx].potar;
break;
case PCI_POTEAR:
value = pci->pob[idx].potear;
break;
case PCI_POWBAR:
value = pci->pob[idx].powbar;
break;
case PCI_POWAR:
value = pci->pob[idx].powar;
break;
default:
break;
}
break;
case PPCE500_PCI_IW3:
case PPCE500_PCI_IW2:
case PPCE500_PCI_IW1:
idx = ((addr >> 5) & 0x3) - 1;
switch (addr & 0xC) {
case PCI_PITAR:
value = pci->pib[idx].pitar;
break;
case PCI_PIWBAR:
value = pci->pib[idx].piwbar;
break;
case PCI_PIWBEAR:
value = pci->pib[idx].piwbear;
break;
case PCI_PIWAR:
value = pci->pib[idx].piwar;
break;
default:
break;
};
break;
case PPCE500_PCI_GASKET_TIMR:
value = pci->gasket_time;
break;
default:
break;
}
pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,
win, addr, value);
return value;
}
static void pci_reg_write4(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
PPCE500PCIState *pci = opaque;
unsigned long win;
int idx;
win = addr & 0xfe0;
pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
__func__, (unsigned)value, win, addr);
switch (win) {
case PPCE500_PCI_OW1:
case PPCE500_PCI_OW2:
case PPCE500_PCI_OW3:
case PPCE500_PCI_OW4:
idx = (addr >> 5) & 0x7;
switch (addr & 0xC) {
case PCI_POTAR:
pci->pob[idx].potar = value;
break;
case PCI_POTEAR:
pci->pob[idx].potear = value;
break;
case PCI_POWBAR:
pci->pob[idx].powbar = value;
break;
case PCI_POWAR:
pci->pob[idx].powar = value;
break;
default:
break;
};
break;
case PPCE500_PCI_IW3:
case PPCE500_PCI_IW2:
case PPCE500_PCI_IW1:
idx = ((addr >> 5) & 0x3) - 1;
switch (addr & 0xC) {
case PCI_PITAR:
pci->pib[idx].pitar = value;
break;
case PCI_PIWBAR:
pci->pib[idx].piwbar = value;
break;
case PCI_PIWBEAR:
pci->pib[idx].piwbear = value;
break;
case PCI_PIWAR:
pci->pib[idx].piwar = value;
break;
default:
break;
};
break;
case PPCE500_PCI_GASKET_TIMR:
pci->gasket_time = value;
break;
default:
break;
};
}
static const MemoryRegionOps e500_pci_reg_ops = {
.read = pci_reg_read4,
.write = pci_reg_write4,
.endianness = DEVICE_BIG_ENDIAN,
};
static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
{
int devno = pci_dev->devfn >> 3, ret = 0;
switch (devno) {
/* Two PCI slot */
case 0x11:
case 0x12:
ret = (irq_num + devno - 0x10) % 4;
break;
default:
printf("Error:%s:unknown dev number\n", __func__);
}
pci_debug("%s: devfn %x irq %d -> %d devno:%x\n", __func__,
pci_dev->devfn, irq_num, ret, devno);
return ret;
}
static void mpc85xx_pci_set_irq(void *opaque, int irq_num, int level)
{
qemu_irq *pic = opaque;
pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
qemu_set_irq(pic[irq_num], level);
}
static const VMStateDescription vmstate_pci_outbound = {
.name = "pci_outbound",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT32(potar, struct pci_outbound),
VMSTATE_UINT32(potear, struct pci_outbound),
VMSTATE_UINT32(powbar, struct pci_outbound),
VMSTATE_UINT32(powar, struct pci_outbound),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_pci_inbound = {
.name = "pci_inbound",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT32(pitar, struct pci_inbound),
VMSTATE_UINT32(piwbar, struct pci_inbound),
VMSTATE_UINT32(piwbear, struct pci_inbound),
VMSTATE_UINT32(piwar, struct pci_inbound),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_ppce500_pci = {
.name = "ppce500_pci",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1,
vmstate_pci_outbound, struct pci_outbound),
VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1,
vmstate_pci_outbound, struct pci_inbound),
VMSTATE_UINT32(gasket_time, PPCE500PCIState),
VMSTATE_END_OF_LIST()
}
};
#include "exec-memory.h"
static int e500_pcihost_initfn(SysBusDevice *dev)
{
PCIHostState *h;
PPCE500PCIState *s;
PCIBus *b;
int i;
MemoryRegion *address_space_mem = get_system_memory();
h = PCI_HOST_BRIDGE(dev);
s = PPC_E500_PCI_HOST_BRIDGE(dev);
for (i = 0; i < ARRAY_SIZE(s->irq); i++) {
sysbus_init_irq(dev, &s->irq[i]);
}
memory_region_init(&s->pio, "pci-pio", PCIE500_PCI_IOLEN);
b = pci_register_bus(DEVICE(dev), NULL, mpc85xx_pci_set_irq,
mpc85xx_pci_map_irq, s->irq, address_space_mem,
&s->pio, PCI_DEVFN(0x11, 0), 4);
h->bus = b;
pci_create_simple(b, 0, "e500-host-bridge");
memory_region_init(&s->container, "pci-container", PCIE500_ALL_SIZE);
memory_region_init_io(&h->conf_mem, &pci_host_conf_be_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, &e500_pci_reg_ops, s,
"pci.reg", PCIE500_REG_SIZE);
memory_region_add_subregion(&s->container, PCIE500_CFGADDR, &h->conf_mem);
memory_region_add_subregion(&s->container, PCIE500_CFGDATA, &h->data_mem);
memory_region_add_subregion(&s->container, PCIE500_REG_BASE, &s->iomem);
sysbus_init_mmio(dev, &s->container);
sysbus_init_mmio(dev, &s->pio);
return 0;
}
static void e500_host_bridge_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->vendor_id = PCI_VENDOR_ID_FREESCALE;
k->device_id = PCI_DEVICE_ID_MPC8533E;
k->class_id = PCI_CLASS_PROCESSOR_POWERPC;
dc->desc = "Host bridge";
}
static const TypeInfo e500_host_bridge_info = {
.name = "e500-host-bridge",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIDevice),
.class_init = e500_host_bridge_class_init,
};
static void e500_pcihost_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = e500_pcihost_initfn;
dc->vmsd = &vmstate_ppce500_pci;
}
static const TypeInfo e500_pcihost_info = {
.name = TYPE_PPC_E500_PCI_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(PPCE500PCIState),
.class_init = e500_pcihost_class_init,
};
static void e500_pci_register_types(void)
{
type_register_static(&e500_pcihost_info);
type_register_static(&e500_host_bridge_info);
}
type_init(e500_pci_register_types)
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