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Implement sun4u PCI IRQ routing.

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Allow multiple PCI busses and PCI-PCI bridges.
Fix bugs in Versatile PCI implementation.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2166 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2006-09-24 17:01:44 +00:00
parent d2b5931756
commit 80b3ada7dd
8 changed files with 146 additions and 39 deletions
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37
hw/apb_pci.c
View File

@ -21,6 +21,11 @@
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* XXX This file and most of its contests are somewhat misnamed. The
Ultrasparc PCI host is called the PCI Bus Module (PBM). The APB is
the secondary PCI bridge. */
#include "vl.h"
typedef target_phys_addr_t pci_addr_t;
#include "pci_host.h"
@ -179,17 +184,25 @@ static CPUReadMemoryFunc *pci_apb_ioread[] = {
&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)
{
/* ??? As mentioned below this is probably wrong. */
return 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 *pic, int irq_num, int level)
{
/* ??? This is almost certainly wrong. However the rest of the sun4u
IRQ handling is missing, as is OpenBIOS support, so it wouldn't work
anyway. */
/* PCI IRQ map onto the first 32 INO. */
pic_set_irq_new(pic, irq_num, level);
}
@ -199,10 +212,12 @@ PCIBus *pci_apb_init(target_ulong special_base, target_ulong mem_base,
APBState *s;
PCIDevice *d;
int pci_mem_config, pci_mem_data, apb_config, pci_ioport;
PCIDevice *apb;
PCIBus *secondary;
s = qemu_mallocz(sizeof(APBState));
/* Ultrasparc APB main bus */
s->bus = pci_register_bus(pci_apb_set_irq, pci_apb_map_irq, pic, 0);
/* Ultrasparc PBM main bus */
s->bus = pci_register_bus(pci_apb_set_irq, pci_pbm_map_irq, pic, 0, 32);
pci_mem_config = cpu_register_io_memory(0, pci_apb_config_read,
pci_apb_config_write, s);
@ -219,7 +234,7 @@ PCIBus *pci_apb_init(target_ulong special_base, target_ulong mem_base,
cpu_register_physical_memory(mem_base, 0x10000000, pci_mem_data); // XXX size should be 4G-prom
d = pci_register_device(s->bus, "Advanced PCI Bus", sizeof(PCIDevice),
-1, NULL, NULL);
0, NULL, NULL);
d->config[0x00] = 0x8e; // vendor_id : Sun
d->config[0x01] = 0x10;
d->config[0x02] = 0x00; // device_id
@ -234,7 +249,11 @@ PCIBus *pci_apb_init(target_ulong special_base, target_ulong mem_base,
d->config[0x0B] = 0x06; // class_base = PCI_bridge
d->config[0x0D] = 0x10; // latency_timer
d->config[0x0E] = 0x00; // header_type
return s->bus;
/* APB secondary busses */
secondary = pci_bridge_init(s->bus, 8, 0x108e5000, pci_apb_map_irq);
pci_bridge_init(s->bus, 9, 0x108e5000, pci_apb_map_irq);
return secondary;
}

3
hw/grackle_pci.c
View File

@ -92,7 +92,8 @@ PCIBus *pci_grackle_init(uint32_t base, void *pic)
int pci_mem_config, pci_mem_data;
s = qemu_mallocz(sizeof(GrackleState));
s->bus = pci_register_bus(pci_grackle_set_irq, pci_grackle_map_irq, pic, 0);
s->bus = pci_register_bus(pci_grackle_set_irq, pci_grackle_map_irq,
pic, 0, 0);
pci_mem_config = cpu_register_io_memory(0, pci_grackle_config_read,
pci_grackle_config_write, s);

103
hw/pci.c
View File

@ -35,9 +35,11 @@ struct PCIBus {
SetIRQFunc *low_set_irq;
void *irq_opaque;
PCIDevice *devices[256];
PCIDevice *parent_dev;
PCIBus *next;
/* The bus IRQ state is the logical OR of the connected devices.
Keep a count of the number of devices with raised IRQs. */
int irq_count[4];
int irq_count[];
};
static void pci_update_mappings(PCIDevice *d);
@ -47,19 +49,29 @@ static int pci_irq_index;
static PCIBus *first_bus;
PCIBus *pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *pic, int devfn_min)
void *pic, int devfn_min, int nirq)
{
PCIBus *bus;
bus = qemu_mallocz(sizeof(PCIBus));
bus = qemu_mallocz(sizeof(PCIBus) + (nirq * sizeof(int)));
bus->set_irq = set_irq;
bus->map_irq = map_irq;
bus->irq_opaque = pic;
bus->devfn_min = devfn_min;
memset(bus->irq_count, 0, sizeof(bus->irq_count));
first_bus = bus;
return bus;
}
PCIBus *pci_register_secondary_bus(PCIDevice *dev, pci_map_irq_fn map_irq)
{
PCIBus *bus;
bus = qemu_mallocz(sizeof(PCIBus));
bus->map_irq = map_irq;
bus->parent_dev = dev;
bus->next = dev->bus->next;
dev->bus->next = bus;
return bus;
}
int pci_bus_num(PCIBus *s)
{
return s->bus_num;
@ -351,7 +363,9 @@ void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
addr, val, len);
#endif
bus_num = (addr >> 16) & 0xff;
if (bus_num != 0)
while (s && s->bus_num != bus_num)
s = s->next;
if (!s)
return;
pci_dev = s->devices[(addr >> 8) & 0xff];
if (!pci_dev)
@ -372,7 +386,9 @@ uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
uint32_t val;
bus_num = (addr >> 16) & 0xff;
if (bus_num != 0)
while (s && s->bus_num != bus_num)
s= s->next;
if (!s)
goto fail;
pci_dev = s->devices[(addr >> 8) & 0xff];
if (!pci_dev) {
@ -411,11 +427,21 @@ uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
/* 0 <= irq_num <= 3. level must be 0 or 1 */
void pci_set_irq(PCIDevice *pci_dev, int irq_num, int level)
{
PCIBus *bus = pci_dev->bus;
PCIBus *bus;
int change;
change = level - pci_dev->irq_state[irq_num];
if (!change)
return;
irq_num = bus->map_irq(pci_dev, irq_num);
bus->irq_count[irq_num] += level - pci_dev->irq_state[irq_num];
pci_dev->irq_state[irq_num] = level;
bus = pci_dev->bus;
while (!bus->set_irq) {
irq_num = bus->map_irq(pci_dev, irq_num);
pci_dev = bus->parent_dev;
bus = pci_dev->bus;
}
bus->irq_count[irq_num] += change;
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
}
@ -465,6 +491,9 @@ static void pci_info_device(PCIDevice *d)
if (d->config[PCI_INTERRUPT_PIN] != 0) {
term_printf(" IRQ %d.\n", d->config[PCI_INTERRUPT_LINE]);
}
if (class == 0x0604) {
term_printf(" BUS %d.\n", d->config[0x19]);
}
for(i = 0;i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
if (r->size != 0) {
@ -478,14 +507,19 @@ static void pci_info_device(PCIDevice *d)
}
}
}
if (class == 0x0604 && d->config[0x19] != 0) {
pci_for_each_device(d->config[0x19], pci_info_device);
}
}
void pci_for_each_device(void (*fn)(PCIDevice *d))
void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d))
{
PCIBus *bus = first_bus;
PCIDevice *d;
int devfn;
while (bus && bus->bus_num != bus_num)
bus = bus->next;
if (bus) {
for(devfn = 0; devfn < 256; devfn++) {
d = bus->devices[devfn];
@ -497,7 +531,7 @@ void pci_for_each_device(void (*fn)(PCIDevice *d))
void pci_info(void)
{
pci_for_each_device(pci_info_device);
pci_for_each_device(0, pci_info_device);
}
/* Initialize a PCI NIC. */
@ -515,3 +549,50 @@ void pci_nic_init(PCIBus *bus, NICInfo *nd)
}
}
typedef struct {
PCIDevice dev;
PCIBus *bus;
} PCIBridge;
void pci_bridge_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
PCIBridge *s = (PCIBridge *)d;
if (address == 0x19 || (address == 0x18 && len > 1)) {
if (address == 0x19)
s->bus->bus_num = val & 0xff;
else
s->bus->bus_num = (val >> 8) & 0xff;
#if defined(DEBUG_PCI)
printf ("pci-bridge: %s: Assigned bus %d\n", d->name, s->bus->bus_num);
#endif
}
pci_default_write_config(d, address, val, len);
}
PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
pci_map_irq_fn map_irq, const char *name)
{
PCIBridge *s;
s = (PCIBridge *)pci_register_device(bus, name, sizeof(PCIBridge),
devfn, NULL, pci_bridge_write_config);
s->dev.config[0x00] = id >> 16;
s->dev.config[0x01] = id > 24;
s->dev.config[0x02] = id; // device_id
s->dev.config[0x03] = id >> 8;
s->dev.config[0x04] = 0x06; // command = bus master, pci mem
s->dev.config[0x05] = 0x00;
s->dev.config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
s->dev.config[0x07] = 0x00; // status = fast devsel
s->dev.config[0x08] = 0x00; // revision
s->dev.config[0x09] = 0x00; // programming i/f
s->dev.config[0x0A] = 0x04; // class_sub = PCI to PCI bridge
s->dev.config[0x0B] = 0x06; // class_base = PCI_bridge
s->dev.config[0x0D] = 0x10; // latency_timer
s->dev.config[0x0E] = 0x81; // header_type
s->dev.config[0x1E] = 0xa0; // secondary status
s->bus = pci_register_secondary_bus(&s->dev, map_irq);
return s->bus;
}

14
hw/piix_pci.c
View File

@ -59,7 +59,7 @@ PCIBus *i440fx_init(void)
I440FXState *s;
s = qemu_mallocz(sizeof(I440FXState));
b = pci_register_bus(piix3_set_irq, pci_slot_get_pirq, NULL, 0);
b = pci_register_bus(piix3_set_irq, pci_slot_get_pirq, NULL, 0, 4);
s->bus = b;
register_ioport_write(0xcf8, 4, 4, i440fx_addr_writel, s);
@ -226,6 +226,7 @@ static uint32_t pci_bios_io_addr;
static uint32_t pci_bios_mem_addr;
/* host irqs corresponding to PCI irqs A-D */
static uint8_t pci_irqs[4] = { 11, 9, 11, 9 };
static int pci_bios_next_bus;
static void pci_config_writel(PCIDevice *d, uint32_t addr, uint32_t val)
{
@ -320,6 +321,14 @@ static void pci_bios_init_device(PCIDevice *d)
pci_set_io_region_addr(d, 3, 0x374);
}
break;
case 0x0604:
/* PCI to PCI bridge. Assign bus ID and recurse to configure
devices on the secondary bus. */
i = pci_bios_next_bus++;
pci_config_writeb(d, 0x18, pci_bus_num(d->bus));
pci_config_writeb(d, 0x19, i);
pci_for_each_device(i, pci_bios_init_device);
break;
case 0x0300:
if (vendor_id != 0x1234)
goto default_map;
@ -398,6 +407,7 @@ void pci_bios_init(void)
isa_outb(elcr[0], 0x4d0);
isa_outb(elcr[1], 0x4d1);
pci_for_each_device(pci_bios_init_device);
pci_bios_next_bus = 1;
pci_for_each_device(0, pci_bios_init_device);
}

12
hw/prep_pci.c
View File

@ -120,18 +120,12 @@ static CPUReadMemoryFunc *PPC_PCIIO_read[] = {
/* Don't know if this matches real hardware, but it agrees with OHW. */
static int prep_map_irq(PCIDevice *pci_dev, int irq_num)
{
return (irq_num + (pci_dev->devfn >> 3)) & 3;
return (irq_num + (pci_dev->devfn >> 3)) & 1;
}
static int prep_irq_levels[4];
static void prep_set_irq(void *pic, int irq_num, int level)
{
int pic_irq_num;
prep_irq_levels[irq_num] = level;
level |= prep_irq_levels[irq_num ^ 2];
pic_irq_num = (irq_num == 0 || irq_num == 2) ? 9 : 11;
pic_set_irq(pic_irq_num, level);
pic_set_irq(irq_num ? 11 : 9, level);
}
PCIBus *pci_prep_init(void)
@ -141,7 +135,7 @@ PCIBus *pci_prep_init(void)
int PPC_io_memory;
s = qemu_mallocz(sizeof(PREPPCIState));
s->bus = pci_register_bus(prep_set_irq, prep_map_irq, NULL, 0);
s->bus = pci_register_bus(prep_set_irq, prep_map_irq, NULL, 0, 2);
register_ioport_write(0xcf8, 4, 4, pci_prep_addr_writel, s);
register_ioport_read(0xcf8, 4, 4, pci_prep_addr_readl, s);

2
hw/unin_pci.c
View File

@ -161,7 +161,7 @@ PCIBus *pci_pmac_init(void *pic)
/* Uninorth main bus */
s = qemu_mallocz(sizeof(UNINState));
s->bus = pci_register_bus(pci_unin_set_irq, pci_unin_map_irq,
pic, 11 << 3);
pic, 11 << 3, 4);
pci_mem_config = cpu_register_io_memory(0, pci_unin_main_config_read,
pci_unin_main_config_write, s);

8
hw/versatile_pci.c
View File

@ -11,7 +11,7 @@
static inline uint32_t vpb_pci_config_addr(target_phys_addr_t addr)
{
return addr & 0xf8ff;
return addr & 0xffffff;
}
static void pci_vpb_config_writeb (void *opaque, target_phys_addr_t addr,
@ -105,15 +105,15 @@ PCIBus *pci_vpb_init(void *pic, int irq, int realview)
base = 0x40000000;
name = "Versatile/PB PCI Controller";
}
s = pci_register_bus(pci_vpb_set_irq, pci_vpb_map_irq, pic, 11 << 3);
s = pci_register_bus(pci_vpb_set_irq, pci_vpb_map_irq, pic, 11 << 3, 4);
/* ??? Register memory space. */
mem_config = cpu_register_io_memory(0, pci_vpb_config_read,
pci_vpb_config_write, s);
/* Selfconfig area. */
cpu_register_physical_memory(base + 0x01000000, 0x10000, mem_config);
cpu_register_physical_memory(base + 0x01000000, 0x1000000, mem_config);
/* Normal config area. */
cpu_register_physical_memory(base + 0x02000000, 0x10000, mem_config);
cpu_register_physical_memory(base + 0x02000000, 0x1000000, mem_config);
d = pci_register_device(s, name, sizeof(PCIDevice), -1, NULL, NULL);

6
vl.h
View File

@ -759,15 +759,17 @@ int pci_device_load(PCIDevice *s, QEMUFile *f);
typedef void (*pci_set_irq_fn)(void *pic, int irq_num, int level);
typedef int (*pci_map_irq_fn)(PCIDevice *pci_dev, int irq_num);
PCIBus *pci_register_bus(pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *pic, int devfn_min);
void *pic, int devfn_min, int nirq);
void pci_nic_init(PCIBus *bus, NICInfo *nd);
void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len);
uint32_t pci_data_read(void *opaque, uint32_t addr, int len);
int pci_bus_num(PCIBus *s);
void pci_for_each_device(void (*fn)(PCIDevice *d));
void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d));
void pci_info(void);
PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint32_t id,
pci_map_irq_fn map_irq, const char *name);
/* prep_pci.c */
PCIBus *pci_prep_init(void);