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qemu-patch-raspberry4/hw/ppce500_pci.c
Alexander Graf 6ebf5905f4 pci-host: Delegate bswap to mmio layer 
The only reason we have bswap versions of the pci host code is that
most pci host devices are little endian. The ppc e500 is the only
odd one here, being big endian.

So let's directly pass the endianness down to the mmio layer and not
worry about it on the pci host layer.

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

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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 "ppce500.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_REG_SIZE (0x1000 - PCIE500_REG_BASE)
#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;
};
struct PPCE500PCIState {
struct pci_outbound pob[PPCE500_PCI_NR_POBS];
struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
uint32_t gasket_time;
PCIHostState pci_state;
PCIDevice *pci_dev;
};
typedef struct PPCE500PCIState PPCE500PCIState;
static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
{
PPCE500PCIState *pci = opaque;
unsigned long win;
uint32_t value = 0;
win = addr & 0xfe0;
switch (win) {
case PPCE500_PCI_OW1:
case PPCE500_PCI_OW2:
case PPCE500_PCI_OW3:
case PPCE500_PCI_OW4:
switch (addr & 0xC) {
case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
default: break;
}
break;
case PPCE500_PCI_IW3:
case PPCE500_PCI_IW2:
case PPCE500_PCI_IW1:
switch (addr & 0xC) {
case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].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 CPUReadMemoryFunc * const e500_pci_reg_read[] = {
&pci_reg_read4,
&pci_reg_read4,
&pci_reg_read4,
};
static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
PPCE500PCIState *pci = opaque;
unsigned long win;
win = addr & 0xfe0;
pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
__func__, value, win, addr);
switch (win) {
case PPCE500_PCI_OW1:
case PPCE500_PCI_OW2:
case PPCE500_PCI_OW3:
case PPCE500_PCI_OW4:
switch (addr & 0xC) {
case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
default: break;
};
break;
case PPCE500_PCI_IW3:
case PPCE500_PCI_IW2:
case PPCE500_PCI_IW1:
switch (addr & 0xC) {
case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
default: break;
};
break;
case PPCE500_PCI_GASKET_TIMR:
pci->gasket_time = value;
break;
default:
break;
};
}
static CPUWriteMemoryFunc * const e500_pci_reg_write[] = {
&pci_reg_write4,
&pci_reg_write4,
&pci_reg_write4,
};
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:unknow 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 void ppce500_pci_save(QEMUFile *f, void *opaque)
{
PPCE500PCIState *controller = opaque;
int i;
pci_device_save(controller->pci_dev, f);
for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
qemu_put_be32s(f, &controller->pob[i].potar);
qemu_put_be32s(f, &controller->pob[i].potear);
qemu_put_be32s(f, &controller->pob[i].powbar);
qemu_put_be32s(f, &controller->pob[i].powar);
}
for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
qemu_put_be32s(f, &controller->pib[i].pitar);
qemu_put_be32s(f, &controller->pib[i].piwbar);
qemu_put_be32s(f, &controller->pib[i].piwbear);
qemu_put_be32s(f, &controller->pib[i].piwar);
}
qemu_put_be32s(f, &controller->gasket_time);
}
static int ppce500_pci_load(QEMUFile *f, void *opaque, int version_id)
{
PPCE500PCIState *controller = opaque;
int i;
if (version_id != 1)
return -EINVAL;
pci_device_load(controller->pci_dev, f);
for (i = 0; i < PPCE500_PCI_NR_POBS; i++) {
qemu_get_be32s(f, &controller->pob[i].potar);
qemu_get_be32s(f, &controller->pob[i].potear);
qemu_get_be32s(f, &controller->pob[i].powbar);
qemu_get_be32s(f, &controller->pob[i].powar);
}
for (i = 0; i < PPCE500_PCI_NR_PIBS; i++) {
qemu_get_be32s(f, &controller->pib[i].pitar);
qemu_get_be32s(f, &controller->pib[i].piwbar);
qemu_get_be32s(f, &controller->pib[i].piwbear);
qemu_get_be32s(f, &controller->pib[i].piwar);
}
qemu_get_be32s(f, &controller->gasket_time);
return 0;
}
PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
{
PPCE500PCIState *controller;
PCIDevice *d;
int index;
static int ppce500_pci_id;
controller = qemu_mallocz(sizeof(PPCE500PCIState));
controller->pci_state.bus = pci_register_bus(NULL, "pci",
mpc85xx_pci_set_irq,
mpc85xx_pci_map_irq,
pci_irqs, PCI_DEVFN(0x11, 0),
4);
d = pci_register_device(controller->pci_state.bus,
"host bridge", sizeof(PCIDevice),
0, NULL, NULL);
pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FREESCALE);
pci_config_set_device_id(d->config, PCI_DEVICE_ID_MPC8533E);
pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
controller->pci_dev = d;
/* CFGADDR */
index = pci_host_conf_register_mmio(&controller->pci_state,
DEVICE_BIG_ENDIAN);
if (index < 0)
goto free;
cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);
/* CFGDATA */
index = pci_host_data_register_mmio(&controller->pci_state,
DEVICE_BIG_ENDIAN);
if (index < 0)
goto free;
cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
index = cpu_register_io_memory(e500_pci_reg_read,
e500_pci_reg_write, controller,
DEVICE_NATIVE_ENDIAN);
if (index < 0)
goto free;
cpu_register_physical_memory(registers + PCIE500_REG_BASE,
PCIE500_REG_SIZE, index);
/* XXX load/save code not tested. */
register_savevm(&d->qdev, "ppce500_pci", ppce500_pci_id++,
1, ppce500_pci_save, ppce500_pci_load, controller);
return controller->pci_state.bus;
free:
printf("%s error\n", __func__);
qemu_free(controller);
return NULL;
}
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