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qemu/hw/pci-host/sabre.c

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/*
* QEMU Ultrasparc Sabre PCI host (PBM)
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2012,2013 Artyom Tarasenko
* Copyright (c) 2018 Mark Cave-Ayland
*
* 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.
*/
#include "qemu/osdep.h"
#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-bridge/simba.h"
#include "hw/pci-host/sabre.h"
#include "sysemu/sysemu.h"
#include "exec/address-spaces.h"
#include "qemu/log.h"
#include "trace.h"
/*
* Chipset docs:
* PBM: "UltraSPARC IIi User's Manual",
* http://www.sun.com/processors/manuals/805-0087.pdf
*/
#define PBM_PCI_IMR_MASK 0x7fffffff
#define PBM_PCI_IMR_ENABLED 0x80000000
#define POR (1U << 31)
#define SOFT_POR (1U << 30)
#define SOFT_XIR (1U << 29)
#define BTN_POR (1U << 28)
#define BTN_XIR (1U << 27)
#define RESET_MASK 0xf8000000
#define RESET_WCMASK 0x98000000
#define RESET_WMASK 0x60000000
#define NO_IRQ_REQUEST (MAX_IVEC + 1)
static inline void sabre_set_request(SabreState *s, unsigned int irq_num)
{
trace_sabre_set_request(irq_num);
s->irq_request = irq_num;
qemu_set_irq(s->ivec_irqs[irq_num], 1);
}
static inline void sabre_check_irqs(SabreState *s)
{
unsigned int i;
/* Previous request is not acknowledged, resubmit */
if (s->irq_request != NO_IRQ_REQUEST) {
sabre_set_request(s, s->irq_request);
return;
}
/* no request pending */
if (s->pci_irq_in == 0ULL) {
return;
}
for (i = 0; i < 32; i++) {
if (s->pci_irq_in & (1ULL << i)) {
if (s->pci_irq_map[i >> 2] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, i);
return;
}
}
}
for (i = 32; i < 64; i++) {
if (s->pci_irq_in & (1ULL << i)) {
if (s->obio_irq_map[i - 32] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, i);
break;
}
}
}
}
static inline void sabre_clear_request(SabreState *s, unsigned int irq_num)
{
trace_sabre_clear_request(irq_num);
qemu_set_irq(s->ivec_irqs[irq_num], 0);
s->irq_request = NO_IRQ_REQUEST;
}
static AddressSpace *sabre_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
{
IOMMUState *is = opaque;
return &is->iommu_as;
}
static void sabre_config_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SabreState *s = opaque;
trace_sabre_config_write(addr, val);
switch (addr & 0xffff) {
case 0x30 ... 0x4f: /* DMA error registers */
/* XXX: not implemented yet */
break;
case 0xc00 ... 0xc3f: /* PCI interrupt control */
if (addr & 4) {
unsigned int ino = (addr & 0x3f) >> 3;
s->pci_irq_map[ino] &= PBM_PCI_IMR_MASK;
s->pci_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK;
if ((s->irq_request == ino) && !(val & ~PBM_PCI_IMR_MASK)) {
sabre_clear_request(s, ino);
}
sabre_check_irqs(s);
}
break;
case 0x1000 ... 0x107f: /* OBIO interrupt control */
if (addr & 4) {
unsigned int ino = ((addr & 0xff) >> 3);
s->obio_irq_map[ino] &= PBM_PCI_IMR_MASK;
s->obio_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK;
if ((s->irq_request == (ino | 0x20))
&& !(val & ~PBM_PCI_IMR_MASK)) {
sabre_clear_request(s, ino | 0x20);
}
sabre_check_irqs(s);
}
break;
case 0x1400 ... 0x14ff: /* PCI interrupt clear */
if (addr & 4) {
unsigned int ino = (addr & 0xff) >> 5;
if ((s->irq_request / 4) == ino) {
sabre_clear_request(s, s->irq_request);
sabre_check_irqs(s);
}
}
break;
case 0x1800 ... 0x1860: /* OBIO interrupt clear */
if (addr & 4) {
unsigned int ino = ((addr & 0xff) >> 3) | 0x20;
if (s->irq_request == ino) {
sabre_clear_request(s, ino);
sabre_check_irqs(s);
}
}
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(SHUTDOWN_CAUSE_GUEST_RESET);
} else if (val & SOFT_XIR) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
}
}
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 sabre_config_read(void *opaque,
hwaddr addr, unsigned size)
{
SabreState *s = opaque;
uint32_t val;
switch (addr & 0xffff) {
case 0x30 ... 0x4f: /* DMA error registers */
val = 0;
/* XXX: not implemented yet */
break;
case 0xc00 ... 0xc3f: /* PCI interrupt control */
if (addr & 4) {
val = s->pci_irq_map[(addr & 0x3f) >> 3];
} else {
val = 0;
}
break;
case 0x1000 ... 0x107f: /* OBIO interrupt control */
if (addr & 4) {
val = s->obio_irq_map[(addr & 0xff) >> 3];
} else {
val = 0;
}
break;
case 0x1080 ... 0x108f: /* PCI bus error */
if (addr & 4) {
val = s->pci_err_irq_map[(addr & 0xf) >> 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;
}
trace_sabre_config_read(addr, val);
return val;
}
static const MemoryRegionOps sabre_config_ops = {
.read = sabre_config_read,
.write = sabre_config_write,
.endianness = DEVICE_BIG_ENDIAN,
};
static void sabre_pci_config_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SabreState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
trace_sabre_pci_config_write(addr, val);
pci_data_write(phb->bus, addr, val, size);
}
static uint64_t sabre_pci_config_read(void *opaque, hwaddr addr,
unsigned size)
{
uint32_t ret;
SabreState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
ret = pci_data_read(phb->bus, addr, size);
trace_sabre_pci_config_read(addr, ret);
return ret;
}
/* The sabre host has an IRQ line for each IRQ line of each slot. */
static int pci_sabre_map_irq(PCIDevice *pci_dev, int irq_num)
{
/* Return the irq as swizzled by the PBM */
return irq_num;
}
static int pci_simbaA_map_irq(PCIDevice *pci_dev, int irq_num)
{
/* The on-board devices have fixed (legacy) OBIO intnos */
switch (PCI_SLOT(pci_dev->devfn)) {
case 1:
/* Onboard NIC */
return OBIO_NIC_IRQ;
case 3:
/* Onboard IDE */
return OBIO_HDD_IRQ;
default:
/* Normal intno, fall through */
break;
}
return ((PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f;
}
static int pci_simbaB_map_irq(PCIDevice *pci_dev, int irq_num)
{
return (0x10 + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f;
}
static void pci_sabre_set_irq(void *opaque, int irq_num, int level)
{
SabreState *s = opaque;
trace_sabre_pci_set_irq(irq_num, level);
/* PCI IRQ map onto the first 32 INO. */
if (irq_num < 32) {
if (level) {
s->pci_irq_in |= 1ULL << irq_num;
if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, irq_num);
}
} else {
s->pci_irq_in &= ~(1ULL << irq_num);
}
} else {
/* OBIO IRQ map onto the next 32 INO. */
if (level) {
trace_sabre_pci_set_obio_irq(irq_num, level);
s->pci_irq_in |= 1ULL << irq_num;
if ((s->irq_request == NO_IRQ_REQUEST)
&& (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED)) {
sabre_set_request(s, irq_num);
}
} else {
s->pci_irq_in &= ~(1ULL << irq_num);
}
}
}
static void sabre_reset(DeviceState *d)
{
SabreState *s = SABRE_DEVICE(d);
PCIDevice *pci_dev;
unsigned int i;
uint16_t cmd;
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;
}
s->irq_request = NO_IRQ_REQUEST;
s->pci_irq_in = 0ULL;
if (s->nr_resets++ == 0) {
/* Power on reset */
s->reset_control = POR;
}
/* As this is the busA PCI bridge which contains the on-board devices
* attached to the ebus, ensure that we initially allow IO transactions
* so that we get the early serial console until OpenBIOS can properly
* configure the PCI bridge itself */
pci_dev = PCI_DEVICE(s->bridgeA);
cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
pci_set_word(pci_dev->config + PCI_COMMAND, cmd | PCI_COMMAND_IO);
pci_bridge_update_mappings(PCI_BRIDGE(pci_dev));
}
static const MemoryRegionOps pci_config_ops = {
.read = sabre_pci_config_read,
.write = sabre_pci_config_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void sabre_realize(DeviceState *dev, Error **errp)
{
SabreState *s = SABRE_DEVICE(dev);
PCIHostState *phb = PCI_HOST_BRIDGE(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(s);
PCIDevice *pci_dev;
/* sabre_config */
sysbus_mmio_map(sbd, 0, s->special_base);
/* PCI configuration space */
sysbus_mmio_map(sbd, 1, s->special_base + 0x1000000ULL);
/* pci_ioport */
sysbus_mmio_map(sbd, 2, s->special_base + 0x2000000ULL);
memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL);
memory_region_add_subregion(get_system_memory(), s->mem_base,
&s->pci_mmio);
phb->bus = pci_register_root_bus(dev, "pci",
pci_sabre_set_irq, pci_sabre_map_irq, s,
&s->pci_mmio,
&s->pci_ioport,
0, 32, TYPE_PCI_BUS);
pci_create_simple(phb->bus, 0, TYPE_SABRE_PCI_DEVICE);
/* IOMMU */
memory_region_add_subregion_overlap(&s->sabre_config, 0x200,
sysbus_mmio_get_region(SYS_BUS_DEVICE(s->iommu), 0), 1);
pci_setup_iommu(phb->bus, sabre_pci_dma_iommu, s->iommu);
/* APB secondary busses */
pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 0), true,
TYPE_SIMBA_PCI_BRIDGE);
s->bridgeB = PCI_BRIDGE(pci_dev);
pci_bridge_map_irq(s->bridgeB, "pciB", pci_simbaB_map_irq);
qdev_init_nofail(&pci_dev->qdev);
pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 1), true,
TYPE_SIMBA_PCI_BRIDGE);
s->bridgeA = PCI_BRIDGE(pci_dev);
pci_bridge_map_irq(s->bridgeA, "pciA", pci_simbaA_map_irq);
qdev_init_nofail(&pci_dev->qdev);
}
static void sabre_init(Object *obj)
{
SabreState *s = SABRE_DEVICE(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
unsigned int i;
for (i = 0; i < 8; i++) {
s->pci_irq_map[i] = (0x1f << 6) | (i << 2);
}
for (i = 0; i < 2; i++) {
s->pci_err_irq_map[i] = (0x1f << 6) | 0x30;
}
for (i = 0; i < 32; i++) {
s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i;
}
qdev_init_gpio_in_named(DEVICE(s), pci_sabre_set_irq, "pbm-irq", MAX_IVEC);
qdev_init_gpio_out_named(DEVICE(s), s->ivec_irqs, "ivec-irq", MAX_IVEC);
s->irq_request = NO_IRQ_REQUEST;
s->pci_irq_in = 0ULL;
/* IOMMU */
object_property_add_link(obj, "iommu", TYPE_SUN4U_IOMMU,
(Object **) &s->iommu,
qdev_prop_allow_set_link_before_realize,
0, NULL);
/* sabre_config */
memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s,
"sabre-config", 0x10000);
/* at region 0 */
sysbus_init_mmio(sbd, &s->sabre_config);
memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s,
"sabre-pci-config", 0x1000000);
/* at region 1 */
sysbus_init_mmio(sbd, &s->pci_config);
/* pci_ioport */
memory_region_init(&s->pci_ioport, OBJECT(s), "sabre-pci-ioport",
0x1000000);
/* at region 2 */
sysbus_init_mmio(sbd, &s->pci_ioport);
}
static void sabre_pci_realize(PCIDevice *d, Error **errp)
{
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);
}
static void sabre_pci_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->realize = sabre_pci_realize;
k->vendor_id = PCI_VENDOR_ID_SUN;
k->device_id = PCI_DEVICE_ID_SUN_SABRE;
k->class_id = PCI_CLASS_BRIDGE_HOST;
/*
* PCI-facing part of the host bridge, not usable without the
* host-facing part, which can't be device_add'ed, yet.
*/
dc->user_creatable = false;
}
static const TypeInfo sabre_pci_info = {
.name = TYPE_SABRE_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(SabrePCIState),
.class_init = sabre_pci_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static char *sabre_ofw_unit_address(const SysBusDevice *dev)
{
SabreState *s = SABRE_DEVICE(dev);
return g_strdup_printf("%x,%x",
(uint32_t)((s->special_base >> 32) & 0xffffffff),
(uint32_t)(s->special_base & 0xffffffff));
}
static Property sabre_properties[] = {
DEFINE_PROP_UINT64("special-base", SabreState, special_base, 0),
DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void sabre_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
dc->realize = sabre_realize;
dc->reset = sabre_reset;
dc->props = sabre_properties;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->fw_name = "pci";
sbc->explicit_ofw_unit_address = sabre_ofw_unit_address;
}
static const TypeInfo sabre_info = {
.name = TYPE_SABRE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(SabreState),
.instance_init = sabre_init,
.class_init = sabre_class_init,
};
static void sabre_register_types(void)
{
type_register_static(&sabre_info);
type_register_static(&sabre_pci_info);
}
type_init(sabre_register_types)
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