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xemu/hw/pci-host/bonito.c
Philippe Mathieu-Daudé 711ef33731 hw/pci-host/bonito: Allow PCI config accesses smaller than 32-bit 
When running the official PMON firmware for the Fuloong 2E, we see
8-bit and 16-bit accesses to PCI config space:

  $ qemu-system-mips64el -M fuloong2e -bios pmon_2e.bin \
    -trace -trace bonito\* -trace pci_cfg\*

  pci_cfg_write vt82c686b-pm 05:4 @0x90 <- 0xeee1
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x4d2, size: 2
  pci_cfg_write vt82c686b-pm 05:4 @0xd2 <- 0x1
  pci_cfg_write vt82c686b-pm 05:4 @0x4 <- 0x1
  pci_cfg_write vt82c686b-isa 05:0 @0x4 <- 0x7
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x81, size: 1
  pci_cfg_read vt82c686b-isa 05:0 @0x81 -> 0x0
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x81, size: 1
  pci_cfg_write vt82c686b-isa 05:0 @0x81 <- 0x80
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x83, size: 1
  pci_cfg_write vt82c686b-isa 05:0 @0x83 <- 0x89
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x85, size: 1
  pci_cfg_write vt82c686b-isa 05:0 @0x85 <- 0x3
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x5a, size: 1
  pci_cfg_write vt82c686b-isa 05:0 @0x5a <- 0x7
  bonito_spciconf_small_access PCI config address is smaller then 32-bit, addr: 0x85, size: 1
  pci_cfg_write vt82c686b-isa 05:0 @0x85 <- 0x1

Also this is what the Linux kernel does since it supports the Bonito
north bridge:
https://elixir.bootlin.com/linux/v2.6.15/source/arch/mips/pci/ops-bonito64.c#L85

So it seems safe to assume the datasheet is incomplete or outdated
regarding the address constraints.

This problem was exposed by commit 911629e6d3
("vt82c686: Fix SMBus IO base and configuration registers").

Reported-by: BALATON Zoltan <balaton@eik.bme.hu>
Suggested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210624202747.1433023-4-f4bug@amsat.org>
Tested-by: BALATON Zoltan <balaton@eik.bme.hu>
2021-07-02 17:34:55 +02:00

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/*
* bonito north bridge support
*
* Copyright (c) 2008 yajin (yajin@vm-kernel.org)
* Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
*
* This code is licensed under the GNU GPL v2.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
/*
* fuloong 2e mini pc has a bonito north bridge.
*/
/*
* what is the meaning of devfn in qemu and IDSEL in bonito northbridge?
*
* devfn pci_slot<<3 + funno
* one pci bus can have 32 devices and each device can have 8 functions.
*
* In bonito north bridge, pci slot = IDSEL bit - 12.
* For example, PCI_IDSEL_VIA686B = 17,
* pci slot = 17-12=5
*
* so
* VT686B_FUN0's devfn = (5<<3)+0
* VT686B_FUN1's devfn = (5<<3)+1
*
* qemu also uses pci address for north bridge to access pci config register.
* bus_no [23:16]
* dev_no [15:11]
* fun_no [10:8]
* reg_no [7:2]
*
* so function bonito_sbridge_pciaddr for the translation from
* north bridge address to pci address.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/pci/pci.h"
#include "hw/irq.h"
#include "hw/mips/mips.h"
#include "hw/pci/pci_host.h"
#include "migration/vmstate.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "hw/misc/unimp.h"
#include "hw/registerfields.h"
#include "qom/object.h"
#include "trace.h"
/* #define DEBUG_BONITO */
#ifdef DEBUG_BONITO
#define DPRINTF(fmt, ...) fprintf(stderr, "%s: " fmt, __func__, ##__VA_ARGS__)
#else
#define DPRINTF(fmt, ...)
#endif
/* from linux soure code. include/asm-mips/mips-boards/bonito64.h*/
#define BONITO_BOOT_BASE 0x1fc00000
#define BONITO_BOOT_SIZE 0x00100000
#define BONITO_BOOT_TOP (BONITO_BOOT_BASE + BONITO_BOOT_SIZE - 1)
#define BONITO_FLASH_BASE 0x1c000000
#define BONITO_FLASH_SIZE 0x03000000
#define BONITO_FLASH_TOP (BONITO_FLASH_BASE + BONITO_FLASH_SIZE - 1)
#define BONITO_SOCKET_BASE 0x1f800000
#define BONITO_SOCKET_SIZE 0x00400000
#define BONITO_SOCKET_TOP (BONITO_SOCKET_BASE + BONITO_SOCKET_SIZE - 1)
#define BONITO_REG_BASE 0x1fe00000
#define BONITO_REG_SIZE 0x00040000
#define BONITO_REG_TOP (BONITO_REG_BASE + BONITO_REG_SIZE - 1)
#define BONITO_DEV_BASE 0x1ff00000
#define BONITO_DEV_SIZE 0x00100000
#define BONITO_DEV_TOP (BONITO_DEV_BASE + BONITO_DEV_SIZE - 1)
#define BONITO_PCILO_BASE 0x10000000
#define BONITO_PCILO_BASE_VA 0xb0000000
#define BONITO_PCILO_SIZE 0x0c000000
#define BONITO_PCILO_TOP (BONITO_PCILO_BASE + BONITO_PCILO_SIZE - 1)
#define BONITO_PCILO0_BASE 0x10000000
#define BONITO_PCILO1_BASE 0x14000000
#define BONITO_PCILO2_BASE 0x18000000
#define BONITO_PCIHI_BASE 0x20000000
#define BONITO_PCIHI_SIZE 0x60000000
#define BONITO_PCIHI_TOP (BONITO_PCIHI_BASE + BONITO_PCIHI_SIZE - 1)
#define BONITO_PCIIO_BASE 0x1fd00000
#define BONITO_PCIIO_BASE_VA 0xbfd00000
#define BONITO_PCIIO_SIZE 0x00010000
#define BONITO_PCIIO_TOP (BONITO_PCIIO_BASE + BONITO_PCIIO_SIZE - 1)
#define BONITO_PCICFG_BASE 0x1fe80000
#define BONITO_PCICFG_SIZE 0x00080000
#define BONITO_PCICFG_TOP (BONITO_PCICFG_BASE + BONITO_PCICFG_SIZE - 1)
#define BONITO_PCICONFIGBASE 0x00
#define BONITO_REGBASE 0x100
#define BONITO_PCICONFIG_BASE (BONITO_PCICONFIGBASE + BONITO_REG_BASE)
#define BONITO_PCICONFIG_SIZE (0x100)
#define BONITO_INTERNAL_REG_BASE (BONITO_REGBASE + BONITO_REG_BASE)
#define BONITO_INTERNAL_REG_SIZE (0x70)
#define BONITO_SPCICONFIG_BASE (BONITO_PCICFG_BASE)
#define BONITO_SPCICONFIG_SIZE (BONITO_PCICFG_SIZE)
/* 1. Bonito h/w Configuration */
/* Power on register */
#define BONITO_BONPONCFG (0x00 >> 2) /* 0x100 */
/* PCI configuration register */
#define BONITO_BONGENCFG_OFFSET 0x4
#define BONITO_BONGENCFG (BONITO_BONGENCFG_OFFSET >> 2) /*0x104 */
REG32(BONGENCFG, 0x104)
FIELD(BONGENCFG, DEBUGMODE, 0, 1)
FIELD(BONGENCFG, SNOOP, 1, 1)
FIELD(BONGENCFG, CPUSELFRESET, 2, 1)
FIELD(BONGENCFG, BYTESWAP, 6, 1)
FIELD(BONGENCFG, UNCACHED, 7, 1)
FIELD(BONGENCFG, PREFETCH, 8, 1)
FIELD(BONGENCFG, WRITEBEHIND, 9, 1)
FIELD(BONGENCFG, PCIQUEUE, 12, 1)
/* 2. IO & IDE configuration */
#define BONITO_IODEVCFG (0x08 >> 2) /* 0x108 */
/* 3. IO & IDE configuration */
#define BONITO_SDCFG (0x0c >> 2) /* 0x10c */
/* 4. PCI address map control */
#define BONITO_PCIMAP (0x10 >> 2) /* 0x110 */
#define BONITO_PCIMEMBASECFG (0x14 >> 2) /* 0x114 */
#define BONITO_PCIMAP_CFG (0x18 >> 2) /* 0x118 */
/* 5. ICU & GPIO regs */
/* GPIO Regs - r/w */
#define BONITO_GPIODATA_OFFSET 0x1c
#define BONITO_GPIODATA (BONITO_GPIODATA_OFFSET >> 2) /* 0x11c */
#define BONITO_GPIOIE (0x20 >> 2) /* 0x120 */
/* ICU Configuration Regs - r/w */
#define BONITO_INTEDGE (0x24 >> 2) /* 0x124 */
#define BONITO_INTSTEER (0x28 >> 2) /* 0x128 */
#define BONITO_INTPOL (0x2c >> 2) /* 0x12c */
/* ICU Enable Regs - IntEn & IntISR are r/o. */
#define BONITO_INTENSET (0x30 >> 2) /* 0x130 */
#define BONITO_INTENCLR (0x34 >> 2) /* 0x134 */
#define BONITO_INTEN (0x38 >> 2) /* 0x138 */
#define BONITO_INTISR (0x3c >> 2) /* 0x13c */
/* PCI mail boxes */
#define BONITO_PCIMAIL0_OFFSET 0x40
#define BONITO_PCIMAIL1_OFFSET 0x44
#define BONITO_PCIMAIL2_OFFSET 0x48
#define BONITO_PCIMAIL3_OFFSET 0x4c
#define BONITO_PCIMAIL0 (0x40 >> 2) /* 0x140 */
#define BONITO_PCIMAIL1 (0x44 >> 2) /* 0x144 */
#define BONITO_PCIMAIL2 (0x48 >> 2) /* 0x148 */
#define BONITO_PCIMAIL3 (0x4c >> 2) /* 0x14c */
/* 6. PCI cache */
#define BONITO_PCICACHECTRL (0x50 >> 2) /* 0x150 */
#define BONITO_PCICACHETAG (0x54 >> 2) /* 0x154 */
#define BONITO_PCIBADADDR (0x58 >> 2) /* 0x158 */
#define BONITO_PCIMSTAT (0x5c >> 2) /* 0x15c */
/* 7. other*/
#define BONITO_TIMECFG (0x60 >> 2) /* 0x160 */
#define BONITO_CPUCFG (0x64 >> 2) /* 0x164 */
#define BONITO_DQCFG (0x68 >> 2) /* 0x168 */
#define BONITO_MEMSIZE (0x6C >> 2) /* 0x16c */
#define BONITO_REGS (0x70 >> 2)
/* PCI config for south bridge. type 0 */
#define BONITO_PCICONF_IDSEL_MASK 0xfffff800 /* [31:11] */
#define BONITO_PCICONF_IDSEL_OFFSET 11
#define BONITO_PCICONF_FUN_MASK 0x700 /* [10:8] */
#define BONITO_PCICONF_FUN_OFFSET 8
#define BONITO_PCICONF_REG_MASK_DS (~3) /* Per datasheet */
#define BONITO_PCICONF_REG_MASK_HW 0xff /* As seen running PMON */
#define BONITO_PCICONF_REG_OFFSET 0
/* idsel BIT = pci slot number +12 */
#define PCI_SLOT_BASE 12
#define PCI_IDSEL_VIA686B_BIT (17)
#define PCI_IDSEL_VIA686B (1 << PCI_IDSEL_VIA686B_BIT)
#define PCI_ADDR(busno , devno , funno , regno) \
((PCI_BUILD_BDF(busno, PCI_DEVFN(devno , funno)) << 8) + (regno))
typedef struct BonitoState BonitoState;
struct PCIBonitoState {
PCIDevice dev;
BonitoState *pcihost;
uint32_t regs[BONITO_REGS];
struct bonldma {
uint32_t ldmactrl;
uint32_t ldmastat;
uint32_t ldmaaddr;
uint32_t ldmago;
} bonldma;
/* Based at 1fe00300, bonito Copier */
struct boncop {
uint32_t copctrl;
uint32_t copstat;
uint32_t coppaddr;
uint32_t copgo;
} boncop;
/* Bonito registers */
MemoryRegion iomem;
MemoryRegion iomem_ldma;
MemoryRegion iomem_cop;
MemoryRegion bonito_pciio;
MemoryRegion bonito_localio;
};
typedef struct PCIBonitoState PCIBonitoState;
struct BonitoState {
PCIHostState parent_obj;
qemu_irq *pic;
PCIBonitoState *pci_dev;
MemoryRegion pci_mem;
};
#define TYPE_BONITO_PCI_HOST_BRIDGE "Bonito-pcihost"
OBJECT_DECLARE_SIMPLE_TYPE(BonitoState, BONITO_PCI_HOST_BRIDGE)
#define TYPE_PCI_BONITO "Bonito"
OBJECT_DECLARE_SIMPLE_TYPE(PCIBonitoState, PCI_BONITO)
static void bonito_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PCIBonitoState *s = opaque;
uint32_t saddr;
int reset = 0;
saddr = addr >> 2;
DPRINTF("bonito_writel "TARGET_FMT_plx" val %lx saddr %x\n",
addr, val, saddr);
switch (saddr) {
case BONITO_BONPONCFG:
case BONITO_IODEVCFG:
case BONITO_SDCFG:
case BONITO_PCIMAP:
case BONITO_PCIMEMBASECFG:
case BONITO_PCIMAP_CFG:
case BONITO_GPIODATA:
case BONITO_GPIOIE:
case BONITO_INTEDGE:
case BONITO_INTSTEER:
case BONITO_INTPOL:
case BONITO_PCIMAIL0:
case BONITO_PCIMAIL1:
case BONITO_PCIMAIL2:
case BONITO_PCIMAIL3:
case BONITO_PCICACHECTRL:
case BONITO_PCICACHETAG:
case BONITO_PCIBADADDR:
case BONITO_PCIMSTAT:
case BONITO_TIMECFG:
case BONITO_CPUCFG:
case BONITO_DQCFG:
case BONITO_MEMSIZE:
s->regs[saddr] = val;
break;
case BONITO_BONGENCFG:
if (!(s->regs[saddr] & 0x04) && (val & 0x04)) {
reset = 1; /* bit 2 jump from 0 to 1 cause reset */
}
s->regs[saddr] = val;
if (reset) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
}
break;
case BONITO_INTENSET:
s->regs[BONITO_INTENSET] = val;
s->regs[BONITO_INTEN] |= val;
break;
case BONITO_INTENCLR:
s->regs[BONITO_INTENCLR] = val;
s->regs[BONITO_INTEN] &= ~val;
break;
case BONITO_INTEN:
case BONITO_INTISR:
DPRINTF("write to readonly bonito register %x\n", saddr);
break;
default:
DPRINTF("write to unknown bonito register %x\n", saddr);
break;
}
}
static uint64_t bonito_readl(void *opaque, hwaddr addr,
unsigned size)
{
PCIBonitoState *s = opaque;
uint32_t saddr;
saddr = addr >> 2;
DPRINTF("bonito_readl "TARGET_FMT_plx"\n", addr);
switch (saddr) {
case BONITO_INTISR:
return s->regs[saddr];
default:
return s->regs[saddr];
}
}
static const MemoryRegionOps bonito_ops = {
.read = bonito_readl,
.write = bonito_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static void bonito_pciconf_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PCIBonitoState *s = opaque;
PCIDevice *d = PCI_DEVICE(s);
DPRINTF("bonito_pciconf_writel "TARGET_FMT_plx" val %lx\n", addr, val);
d->config_write(d, addr, val, 4);
}
static uint64_t bonito_pciconf_readl(void *opaque, hwaddr addr,
unsigned size)
{
PCIBonitoState *s = opaque;
PCIDevice *d = PCI_DEVICE(s);
DPRINTF("bonito_pciconf_readl "TARGET_FMT_plx"\n", addr);
return d->config_read(d, addr, 4);
}
/* north bridge PCI configure space. 0x1fe0 0000 - 0x1fe0 00ff */
static const MemoryRegionOps bonito_pciconf_ops = {
.read = bonito_pciconf_readl,
.write = bonito_pciconf_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static uint64_t bonito_ldma_readl(void *opaque, hwaddr addr,
unsigned size)
{
uint32_t val;
PCIBonitoState *s = opaque;
if (addr >= sizeof(s->bonldma)) {
return 0;
}
val = ((uint32_t *)(&s->bonldma))[addr / sizeof(uint32_t)];
return val;
}
static void bonito_ldma_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PCIBonitoState *s = opaque;
if (addr >= sizeof(s->bonldma)) {
return;
}
((uint32_t *)(&s->bonldma))[addr / sizeof(uint32_t)] = val & 0xffffffff;
}
static const MemoryRegionOps bonito_ldma_ops = {
.read = bonito_ldma_readl,
.write = bonito_ldma_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static uint64_t bonito_cop_readl(void *opaque, hwaddr addr,
unsigned size)
{
uint32_t val;
PCIBonitoState *s = opaque;
if (addr >= sizeof(s->boncop)) {
return 0;
}
val = ((uint32_t *)(&s->boncop))[addr / sizeof(uint32_t)];
return val;
}
static void bonito_cop_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PCIBonitoState *s = opaque;
if (addr >= sizeof(s->boncop)) {
return;
}
((uint32_t *)(&s->boncop))[addr / sizeof(uint32_t)] = val & 0xffffffff;
}
static const MemoryRegionOps bonito_cop_ops = {
.read = bonito_cop_readl,
.write = bonito_cop_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static uint32_t bonito_sbridge_pciaddr(void *opaque, hwaddr addr)
{
PCIBonitoState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s->pcihost);
uint32_t cfgaddr;
uint32_t idsel;
uint32_t devno;
uint32_t funno;
uint32_t regno;
uint32_t pciaddr;
/* support type0 pci config */
if ((s->regs[BONITO_PCIMAP_CFG] & 0x10000) != 0x0) {
return 0xffffffff;
}
cfgaddr = addr & 0xffff;
cfgaddr |= (s->regs[BONITO_PCIMAP_CFG] & 0xffff) << 16;
idsel = (cfgaddr & BONITO_PCICONF_IDSEL_MASK) >>
BONITO_PCICONF_IDSEL_OFFSET;
devno = ctz32(idsel);
funno = (cfgaddr & BONITO_PCICONF_FUN_MASK) >> BONITO_PCICONF_FUN_OFFSET;
regno = (cfgaddr & BONITO_PCICONF_REG_MASK_HW) >> BONITO_PCICONF_REG_OFFSET;
if (idsel == 0) {
error_report("error in bonito pci config address 0x" TARGET_FMT_plx
",pcimap_cfg=0x%x", addr, s->regs[BONITO_PCIMAP_CFG]);
exit(1);
}
pciaddr = PCI_ADDR(pci_bus_num(phb->bus), devno, funno, regno);
DPRINTF("cfgaddr %x pciaddr %x busno %x devno %d funno %d regno %d\n",
cfgaddr, pciaddr, pci_bus_num(phb->bus), devno, funno, regno);
return pciaddr;
}
static void bonito_spciconf_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
PCIBonitoState *s = opaque;
PCIDevice *d = PCI_DEVICE(s);
PCIHostState *phb = PCI_HOST_BRIDGE(s->pcihost);
uint32_t pciaddr;
uint16_t status;
DPRINTF("bonito_spciconf_write "TARGET_FMT_plx" size %d val %lx\n",
addr, size, val);
pciaddr = bonito_sbridge_pciaddr(s, addr);
if (pciaddr == 0xffffffff) {
return;
}
if (addr & ~BONITO_PCICONF_REG_MASK_DS) {
trace_bonito_spciconf_small_access(addr, size);
}
/* set the pci address in s->config_reg */
phb->config_reg = (pciaddr) | (1u << 31);
pci_data_write(phb->bus, phb->config_reg, val, size);
/* clear PCI_STATUS_REC_MASTER_ABORT and PCI_STATUS_REC_TARGET_ABORT */
status = pci_get_word(d->config + PCI_STATUS);
status &= ~(PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT);
pci_set_word(d->config + PCI_STATUS, status);
}
static uint64_t bonito_spciconf_read(void *opaque, hwaddr addr, unsigned size)
{
PCIBonitoState *s = opaque;
PCIDevice *d = PCI_DEVICE(s);
PCIHostState *phb = PCI_HOST_BRIDGE(s->pcihost);
uint32_t pciaddr;
uint16_t status;
DPRINTF("bonito_spciconf_read "TARGET_FMT_plx" size %d\n", addr, size);
pciaddr = bonito_sbridge_pciaddr(s, addr);
if (pciaddr == 0xffffffff) {
return MAKE_64BIT_MASK(0, size * 8);
}
if (addr & ~BONITO_PCICONF_REG_MASK_DS) {
trace_bonito_spciconf_small_access(addr, size);
}
/* set the pci address in s->config_reg */
phb->config_reg = (pciaddr) | (1u << 31);
/* clear PCI_STATUS_REC_MASTER_ABORT and PCI_STATUS_REC_TARGET_ABORT */
status = pci_get_word(d->config + PCI_STATUS);
status &= ~(PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT);
pci_set_word(d->config + PCI_STATUS, status);
return pci_data_read(phb->bus, phb->config_reg, size);
}
/* south bridge PCI configure space. 0x1fe8 0000 - 0x1fef ffff */
static const MemoryRegionOps bonito_spciconf_ops = {
.read = bonito_spciconf_read,
.write = bonito_spciconf_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 1,
.impl.max_access_size = 4,
.endianness = DEVICE_NATIVE_ENDIAN,
};
#define BONITO_IRQ_BASE 32
static void pci_bonito_set_irq(void *opaque, int irq_num, int level)
{
BonitoState *s = opaque;
qemu_irq *pic = s->pic;
PCIBonitoState *bonito_state = s->pci_dev;
int internal_irq = irq_num - BONITO_IRQ_BASE;
if (bonito_state->regs[BONITO_INTEDGE] & (1 << internal_irq)) {
qemu_irq_pulse(*pic);
} else { /* level triggered */
if (bonito_state->regs[BONITO_INTPOL] & (1 << internal_irq)) {
qemu_irq_raise(*pic);
} else {
qemu_irq_lower(*pic);
}
}
}
/* map the original irq (0~3) to bonito irq (16~47, but 16~31 are unused) */
static int pci_bonito_map_irq(PCIDevice *pci_dev, int irq_num)
{
int slot;
slot = PCI_SLOT(pci_dev->devfn);
switch (slot) {
case 5: /* FULOONG2E_VIA_SLOT, SouthBridge, IDE, USB, ACPI, AC97, MC97 */
return irq_num % 4 + BONITO_IRQ_BASE;
case 6: /* FULOONG2E_ATI_SLOT, VGA */
return 4 + BONITO_IRQ_BASE;
case 7: /* FULOONG2E_RTL_SLOT, RTL8139 */
return 5 + BONITO_IRQ_BASE;
case 8 ... 12: /* PCI slot 1 to 4 */
return (slot - 8 + irq_num) + 6 + BONITO_IRQ_BASE;
default: /* Unknown device, don't do any translation */
return irq_num;
}
}
static void bonito_reset(void *opaque)
{
PCIBonitoState *s = opaque;
uint32_t val = 0;
/* set the default value of north bridge registers */
s->regs[BONITO_BONPONCFG] = 0xc40;
val = FIELD_DP32(val, BONGENCFG, PCIQUEUE, 1);
val = FIELD_DP32(val, BONGENCFG, WRITEBEHIND, 1);
val = FIELD_DP32(val, BONGENCFG, PREFETCH, 1);
val = FIELD_DP32(val, BONGENCFG, UNCACHED, 1);
val = FIELD_DP32(val, BONGENCFG, CPUSELFRESET, 1);
s->regs[BONITO_BONGENCFG] = val;
s->regs[BONITO_IODEVCFG] = 0x2bff8010;
s->regs[BONITO_SDCFG] = 0x255e0091;
s->regs[BONITO_GPIODATA] = 0x1ff;
s->regs[BONITO_GPIOIE] = 0x1ff;
s->regs[BONITO_DQCFG] = 0x8;
s->regs[BONITO_MEMSIZE] = 0x10000000;
s->regs[BONITO_PCIMAP] = 0x6140;
}
static const VMStateDescription vmstate_bonito = {
.name = "Bonito",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PCIBonitoState),
VMSTATE_END_OF_LIST()
}
};
static void bonito_pcihost_realize(DeviceState *dev, Error **errp)
{
PCIHostState *phb = PCI_HOST_BRIDGE(dev);
BonitoState *bs = BONITO_PCI_HOST_BRIDGE(dev);
MemoryRegion *pcimem_lo_alias = g_new(MemoryRegion, 3);
memory_region_init(&bs->pci_mem, OBJECT(dev), "pci.mem", BONITO_PCIHI_SIZE);
phb->bus = pci_register_root_bus(dev, "pci",
pci_bonito_set_irq, pci_bonito_map_irq,
dev, &bs->pci_mem, get_system_io(),
PCI_DEVFN(5, 0), 32, TYPE_PCI_BUS);
for (size_t i = 0; i < 3; i++) {
char *name = g_strdup_printf("pci.lomem%zu", i);
memory_region_init_alias(&pcimem_lo_alias[i], NULL, name,
&bs->pci_mem, i * 64 * MiB, 64 * MiB);
memory_region_add_subregion(get_system_memory(),
BONITO_PCILO_BASE + i * 64 * MiB,
&pcimem_lo_alias[i]);
g_free(name);
}
create_unimplemented_device("pci.io", BONITO_PCIIO_BASE, 1 * MiB);
}
static void bonito_realize(PCIDevice *dev, Error **errp)
{
PCIBonitoState *s = PCI_BONITO(dev);
SysBusDevice *sysbus = SYS_BUS_DEVICE(s->pcihost);
PCIHostState *phb = PCI_HOST_BRIDGE(s->pcihost);
BonitoState *bs = BONITO_PCI_HOST_BRIDGE(s->pcihost);
MemoryRegion *pcimem_alias = g_new(MemoryRegion, 1);
/*
* Bonito North Bridge, built on FPGA,
* VENDOR_ID/DEVICE_ID are "undefined"
*/
pci_config_set_prog_interface(dev->config, 0x00);
/* set the north bridge register mapping */
memory_region_init_io(&s->iomem, OBJECT(s), &bonito_ops, s,
"north-bridge-register", BONITO_INTERNAL_REG_SIZE);
sysbus_init_mmio(sysbus, &s->iomem);
sysbus_mmio_map(sysbus, 0, BONITO_INTERNAL_REG_BASE);
/* set the north bridge pci configure mapping */
memory_region_init_io(&phb->conf_mem, OBJECT(s), &bonito_pciconf_ops, s,
"north-bridge-pci-config", BONITO_PCICONFIG_SIZE);
sysbus_init_mmio(sysbus, &phb->conf_mem);
sysbus_mmio_map(sysbus, 1, BONITO_PCICONFIG_BASE);
/* set the south bridge pci configure mapping */
memory_region_init_io(&phb->data_mem, OBJECT(s), &bonito_spciconf_ops, s,
"south-bridge-pci-config", BONITO_SPCICONFIG_SIZE);
sysbus_init_mmio(sysbus, &phb->data_mem);
sysbus_mmio_map(sysbus, 2, BONITO_SPCICONFIG_BASE);
create_unimplemented_device("bonito", BONITO_REG_BASE, BONITO_REG_SIZE);
memory_region_init_io(&s->iomem_ldma, OBJECT(s), &bonito_ldma_ops, s,
"ldma", 0x100);
sysbus_init_mmio(sysbus, &s->iomem_ldma);
sysbus_mmio_map(sysbus, 3, 0x1fe00200);
/* PCI copier */
memory_region_init_io(&s->iomem_cop, OBJECT(s), &bonito_cop_ops, s,
"cop", 0x100);
sysbus_init_mmio(sysbus, &s->iomem_cop);
sysbus_mmio_map(sysbus, 4, 0x1fe00300);
create_unimplemented_device("ROMCS", BONITO_FLASH_BASE, 60 * MiB);
/* Map PCI IO Space 0x1fd0 0000 - 0x1fd1 0000 */
memory_region_init_alias(&s->bonito_pciio, OBJECT(s), "isa_mmio",
get_system_io(), 0, BONITO_PCIIO_SIZE);
sysbus_init_mmio(sysbus, &s->bonito_pciio);
sysbus_mmio_map(sysbus, 5, BONITO_PCIIO_BASE);
/* add pci local io mapping */
memory_region_init_alias(&s->bonito_localio, OBJECT(s), "IOCS[0]",
get_system_io(), 0, 256 * KiB);
sysbus_init_mmio(sysbus, &s->bonito_localio);
sysbus_mmio_map(sysbus, 6, BONITO_DEV_BASE);
create_unimplemented_device("IOCS[1]", BONITO_DEV_BASE + 1 * 256 * KiB,
256 * KiB);
create_unimplemented_device("IOCS[2]", BONITO_DEV_BASE + 2 * 256 * KiB,
256 * KiB);
create_unimplemented_device("IOCS[3]", BONITO_DEV_BASE + 3 * 256 * KiB,
256 * KiB);
memory_region_init_alias(pcimem_alias, NULL, "pci.mem.alias",
&bs->pci_mem, 0, BONITO_PCIHI_SIZE);
memory_region_add_subregion(get_system_memory(),
BONITO_PCIHI_BASE, pcimem_alias);
create_unimplemented_device("PCI_2",
(hwaddr)BONITO_PCIHI_BASE + BONITO_PCIHI_SIZE,
2 * GiB);
/* set the default value of north bridge pci config */
pci_set_word(dev->config + PCI_COMMAND, 0x0000);
pci_set_word(dev->config + PCI_STATUS, 0x0000);
pci_set_word(dev->config + PCI_SUBSYSTEM_VENDOR_ID, 0x0000);
pci_set_word(dev->config + PCI_SUBSYSTEM_ID, 0x0000);
pci_set_byte(dev->config + PCI_INTERRUPT_LINE, 0x00);
pci_config_set_interrupt_pin(dev->config, 0x01); /* interrupt pin A */
pci_set_byte(dev->config + PCI_MIN_GNT, 0x3c);
pci_set_byte(dev->config + PCI_MAX_LAT, 0x00);
qemu_register_reset(bonito_reset, s);
}
PCIBus *bonito_init(qemu_irq *pic)
{
DeviceState *dev;
BonitoState *pcihost;
PCIHostState *phb;
PCIBonitoState *s;
PCIDevice *d;
dev = qdev_new(TYPE_BONITO_PCI_HOST_BRIDGE);
phb = PCI_HOST_BRIDGE(dev);
pcihost = BONITO_PCI_HOST_BRIDGE(dev);
pcihost->pic = pic;
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
d = pci_new(PCI_DEVFN(0, 0), TYPE_PCI_BONITO);
s = PCI_BONITO(d);
s->pcihost = pcihost;
pcihost->pci_dev = s;
pci_realize_and_unref(d, phb->bus, &error_fatal);
return phb->bus;
}
static void bonito_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = bonito_realize;
k->vendor_id = 0xdf53;
k->device_id = 0x00d5;
k->revision = 0x01;
k->class_id = PCI_CLASS_BRIDGE_HOST;
dc->desc = "Host bridge";
dc->vmsd = &vmstate_bonito;
/*
* 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 bonito_info = {
.name = TYPE_PCI_BONITO,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIBonitoState),
.class_init = bonito_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void bonito_pcihost_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = bonito_pcihost_realize;
}
static const TypeInfo bonito_pcihost_info = {
.name = TYPE_BONITO_PCI_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(BonitoState),
.class_init = bonito_pcihost_class_init,
};
static void bonito_register_types(void)
{
type_register_static(&bonito_pcihost_info);
type_register_static(&bonito_info);
}
type_init(bonito_register_types)
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