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qemu/hw/ppc4xx_pci.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

407 lines
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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 "bswap.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 {
struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
PCIHostState pci_state;
PCIDevice *pci_dev;
};
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_SIZE 0x40
static uint32_t pci4xx_cfgaddr_readl(void *opaque, target_phys_addr_t addr)
{
PPC4xxPCIState *ppc4xx_pci = opaque;
return ppc4xx_pci->pci_state.config_reg;
}
static CPUReadMemoryFunc * const pci4xx_cfgaddr_read[] = {
&pci4xx_cfgaddr_readl,
&pci4xx_cfgaddr_readl,
&pci4xx_cfgaddr_readl,
};
static void pci4xx_cfgaddr_writel(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
PPC4xxPCIState *ppc4xx_pci = opaque;
#ifdef TARGET_WORDS_BIGENDIAN
value = bswap32(value);
#endif
ppc4xx_pci->pci_state.config_reg = value & ~0x3;
}
static CPUWriteMemoryFunc * const pci4xx_cfgaddr_write[] = {
&pci4xx_cfgaddr_writel,
&pci4xx_cfgaddr_writel,
&pci4xx_cfgaddr_writel,
};
static void ppc4xx_pci_reg_write4(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
struct PPC4xxPCIState *pci = opaque;
#ifdef TARGET_WORDS_BIGENDIAN
value = bswap32(value);
#endif
/* 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 uint32_t ppc4xx_pci_reg_read4(void *opaque, target_phys_addr_t offset)
{
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;
}
#ifdef TARGET_WORDS_BIGENDIAN
value = bswap32(value);
#endif
return value;
}
static CPUReadMemoryFunc * const pci_reg_read[] = {
&ppc4xx_pci_reg_read4,
&ppc4xx_pci_reg_read4,
&ppc4xx_pci_reg_read4,
};
static CPUWriteMemoryFunc * const pci_reg_write[] = {
&ppc4xx_pci_reg_write4,
&ppc4xx_pci_reg_write4,
&ppc4xx_pci_reg_write4,
};
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);
qemu_set_irq(pci_irqs[irq_num], level);
}
static void ppc4xx_pci_save(QEMUFile *f, void *opaque)
{
PPC4xxPCIState *controller = opaque;
int i;
pci_device_save(controller->pci_dev, f);
for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
qemu_put_be32s(f, &controller->pmm[i].la);
qemu_put_be32s(f, &controller->pmm[i].ma);
qemu_put_be32s(f, &controller->pmm[i].pcila);
qemu_put_be32s(f, &controller->pmm[i].pciha);
}
for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
qemu_put_be32s(f, &controller->ptm[i].ms);
qemu_put_be32s(f, &controller->ptm[i].la);
}
}
static int ppc4xx_pci_load(QEMUFile *f, void *opaque, int version_id)
{
PPC4xxPCIState *controller = opaque;
int i;
if (version_id != 1)
return -EINVAL;
pci_device_load(controller->pci_dev, f);
for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
qemu_get_be32s(f, &controller->pmm[i].la);
qemu_get_be32s(f, &controller->pmm[i].ma);
qemu_get_be32s(f, &controller->pmm[i].pcila);
qemu_get_be32s(f, &controller->pmm[i].pciha);
}
for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
qemu_get_be32s(f, &controller->ptm[i].ms);
qemu_get_be32s(f, &controller->ptm[i].la);
}
return 0;
}
/* XXX Interrupt acknowledge cycles not supported. */
PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4],
target_phys_addr_t config_space,
target_phys_addr_t int_ack,
target_phys_addr_t special_cycle,
target_phys_addr_t registers)
{
PPC4xxPCIState *controller;
int index;
static int ppc4xx_pci_id;
uint8_t *pci_conf;
controller = qemu_mallocz(sizeof(PPC4xxPCIState));
controller->pci_state.bus = pci_register_bus(NULL, "pci",
ppc4xx_pci_set_irq,
ppc4xx_pci_map_irq,
pci_irqs, 0, 4);
controller->pci_dev = pci_register_device(controller->pci_state.bus,
"host bridge", sizeof(PCIDevice),
0, NULL, NULL);
pci_conf = controller->pci_dev->config;
pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_IBM);
pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_IBM_440GX);
pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
/* CFGADDR */
index = cpu_register_io_memory(pci4xx_cfgaddr_read,
pci4xx_cfgaddr_write, controller,
DEVICE_NATIVE_ENDIAN);
if (index < 0)
goto free;
cpu_register_physical_memory(config_space + PCIC0_CFGADDR, 4, index);
/* CFGDATA */
index = pci_host_data_register_mmio(&controller->pci_state, 1);
if (index < 0)
goto free;
cpu_register_physical_memory(config_space + PCIC0_CFGDATA, 4, index);
/* Internal registers */
index = cpu_register_io_memory(pci_reg_read, pci_reg_write, controller,
DEVICE_NATIVE_ENDIAN);
if (index < 0)
goto free;
cpu_register_physical_memory(registers, PCI_REG_SIZE, index);
qemu_register_reset(ppc4xx_pci_reset, controller);
/* XXX load/save code not tested. */
register_savevm(&controller->pci_dev->qdev, "ppc4xx_pci", ppc4xx_pci_id++,
1, ppc4xx_pci_save, ppc4xx_pci_load, controller);
return controller->pci_state.bus;
free:
printf("%s error\n", __func__);
qemu_free(controller);
return NULL;
}
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