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qemu/hw/apb_pci.c

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/*
* 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 "sysbus.h"
#include "pci.h"
#include "pci_host.h"
#include "pci_bridge.h"
#include "pci_internals.h"
#include "rwhandler.h"
#include "apb_pci.h"
#include "sysemu.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
typedef struct APBState {
SysBusDevice busdev;
PCIBus *bus;
ReadWriteHandler pci_config_handler;
uint32_t iommu[4];
uint32_t pci_control[16];
uint32_t pci_irq_map[8];
uint32_t obio_irq_map[32];
qemu_irq pci_irqs[32];
uint32_t reset_control;
unsigned int nr_resets;
} APBState;
static void apb_config_writel (void *opaque, target_phys_addr_t addr,
uint32_t val)
{
APBState *s = opaque;
APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\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 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 uint32_t apb_config_readl (void *opaque,
target_phys_addr_t addr)
{
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 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_lx " -> %x\n", __func__, addr, val);
return val;
}
static CPUWriteMemoryFunc * const apb_config_write[] = {
&apb_config_writel,
&apb_config_writel,
&apb_config_writel,
};
static CPUReadMemoryFunc * const apb_config_read[] = {
&apb_config_readl,
&apb_config_readl,
&apb_config_readl,
};
static void apb_pci_config_write(ReadWriteHandler *h, pcibus_t addr,
uint32_t val, int size)
{
APBState *s = container_of(h, APBState, pci_config_handler);
val = qemu_bswap_len(val, size);
APB_DPRINTF("%s: addr " TARGET_FMT_lx " val %x\n", __func__, addr, val);
pci_data_write(s->bus, addr, val, size);
}
static uint32_t apb_pci_config_read(ReadWriteHandler *h, pcibus_t addr,
int size)
{
uint32_t ret;
APBState *s = container_of(h, APBState, pci_config_handler);
ret = pci_data_read(s->bus, addr, size);
ret = qemu_bswap_len(ret, size);
APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, ret);
return ret;
}
static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
uint32_t val)
{
cpu_outb(addr & IOPORTS_MASK, val);
}
static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
uint32_t val)
{
cpu_outw(addr & IOPORTS_MASK, bswap16(val));
}
static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
uint32_t val)
{
cpu_outl(addr & IOPORTS_MASK, bswap32(val));
}
static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
{
uint32_t val;
val = cpu_inb(addr & IOPORTS_MASK);
return val;
}
static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
{
uint32_t val;
val = bswap16(cpu_inw(addr & IOPORTS_MASK));
return val;
}
static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
{
uint32_t val;
val = bswap32(cpu_inl(addr & IOPORTS_MASK));
return val;
}
static CPUWriteMemoryFunc * const pci_apb_iowrite[] = {
&pci_apb_iowriteb,
&pci_apb_iowritew,
&pci_apb_iowritel,
};
static CPUReadMemoryFunc * const pci_apb_ioread[] = {
&pci_apb_ioreadb,
&pci_apb_ioreadw,
&pci_apb_ioreadl,
};
/* 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->pci_irqs[irq_num], level);
} else {
APB_DPRINTF("%s: not enabled: lower irq %d\n", __func__, irq_num);
qemu_irq_lower(s->pci_irqs[irq_num]);
}
}
}
static int apb_pci_bridge_initfn(PCIDevice *dev)
{
int rc;
rc = pci_bridge_initfn(dev);
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(target_phys_addr_t special_base,
target_phys_addr_t mem_base,
qemu_irq *pic, PCIBus **bus2, PCIBus **bus3)
{
DeviceState *dev;
SysBusDevice *s;
APBState *d;
unsigned int i;
PCIDevice *pci_dev;
PCIBridge *br;
/* Ultrasparc PBM main bus */
dev = qdev_create(NULL, "pbm");
qdev_init_nofail(dev);
s = sysbus_from_qdev(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);
d->bus = pci_register_bus(&d->busdev.qdev, "pci",
pci_apb_set_irq, pci_pbm_map_irq, d,
0, 32);
pci_bus_set_mem_base(d->bus, mem_base);
for (i = 0; i < 32; i++) {
sysbus_connect_irq(s, i, pic[i]);
}
pci_create_simple(d->bus, 0, "pbm");
/* 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;
}
if (s->nr_resets++ == 0) {
/* Power on reset */
s->reset_control = POR;
}
}
static int pci_pbm_init_device(SysBusDevice *dev)
{
APBState *s;
int pci_config, apb_config, pci_ioport;
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++) {
sysbus_init_irq(dev, &s->pci_irqs[i]);
}
/* apb_config */
apb_config = cpu_register_io_memory(apb_config_read,
apb_config_write, s,
DEVICE_NATIVE_ENDIAN);
/* at region 0 */
sysbus_init_mmio(dev, 0x10000ULL, apb_config);
/* PCI configuration space */
s->pci_config_handler.read = apb_pci_config_read;
s->pci_config_handler.write = apb_pci_config_write;
pci_config = cpu_register_io_memory_simple(&s->pci_config_handler,
DEVICE_NATIVE_ENDIAN);
assert(pci_config >= 0);
/* at region 1 */
sysbus_init_mmio(dev, 0x1000000ULL, pci_config);
/* pci_ioport */
pci_ioport = cpu_register_io_memory(pci_apb_ioread,
pci_apb_iowrite, s,
DEVICE_NATIVE_ENDIAN);
/* at region 2 */
sysbus_init_mmio(dev, 0x10000ULL, 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 PCIDeviceInfo pbm_pci_host_info = {
.qdev.name = "pbm",
.qdev.size = sizeof(PCIDevice),
.init = pbm_pci_host_init,
.vendor_id = PCI_VENDOR_ID_SUN,
.device_id = PCI_DEVICE_ID_SUN_SABRE,
.class_id = PCI_CLASS_BRIDGE_HOST,
.is_bridge = 1,
};
static SysBusDeviceInfo pbm_host_info = {
.qdev.name = "pbm",
.qdev.size = sizeof(APBState),
.qdev.reset = pci_pbm_reset,
.init = pci_pbm_init_device,
};
static PCIDeviceInfo pbm_pci_bridge_info = {
.qdev.name = "pbm-bridge",
.qdev.size = sizeof(PCIBridge),
.qdev.vmsd = &vmstate_pci_device,
.qdev.reset = pci_bridge_reset,
.init = apb_pci_bridge_initfn,
.exit = pci_bridge_exitfn,
.vendor_id = PCI_VENDOR_ID_SUN,
.device_id = PCI_DEVICE_ID_SUN_SIMBA,
.revision = 0x11,
.config_write = pci_bridge_write_config,
.is_bridge = 1,
};
static void pbm_register_devices(void)
{
sysbus_register_withprop(&pbm_host_info);
pci_qdev_register(&pbm_pci_host_info);
pci_qdev_register(&pbm_pci_bridge_info);
}
device_init(pbm_register_devices)
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