pci.c
来自「适合KS8695X」· C语言 代码 · 共 903 行 · 第 1/2 页
C
903 行
mem = ptr = (unsigned char *)mmap(0, biosSize, PROT_READ,
MAP_SHARED, mem_fd, RomBase | _bus_base());
#else
mem = ptr = (unsigned char *)mmap(0, biosSize, PROT_READ,
MAP_SHARED, mem_fd, RomBase);
#endif
if (pciP != CurrentPci) {
enablePci = PciRead32(0x4,pciP->Slot.l);
PciWrite32(0x4,enablePci | 0x2,pciP->Slot.l);
}
#ifdef PRINT_PCI
dprint((unsigned long)ptr,0x30);
#endif
while ( *ptr == 0x55 && *(ptr+1) == 0xAA) {
unsigned short data_off = *(ptr+0x18) | (*(ptr+0x19)<< 8);
unsigned char *data = ptr + data_off;
unsigned char type;
int i;
if (*data!='P' || *(data+1)!='C' || *(data+2)!='I' || *(data+3)!='R') {
break;
}
type = *(data + 0x14);
P_printf("data segment in BIOS: 0x%x, type: 0x%x ",data_off,type);
if (type != 0) { /* not PC-AT image: find next one */
unsigned int image_length;
unsigned char indicator = *(data + 0x15);
if (indicator & 0x80) /* last image */
break;
image_length = (*(data + 0x10)
| (*(data + 0x11) << 8)) << 9;
P_printf("data image length: 0x%x, ind: 0x%x\n",
image_length,indicator);
ptr = ptr + image_length;
continue;
}
/* OK, we have a PC Image */
length = (*(ptr + 2) << 9);
P_printf("BIOS length: 0x%x\n",length);
scratch = (unsigned char *)malloc(length);
/* don't use memcpy() here: Reading from bus! */
for (i=0;i<length;i++)
*(scratch + i)=*(ptr + i);
break;
}
if (pciP != CurrentPci)
PciWrite32(0x4,enablePci,pciP->Slot.l);
/* unmap/close/disable PCI bios mem */
munmap(mem, biosSize);
close(mem_fd);
/* disable and restore mapping */
writePci(pciP->Slot.l | 0x30, pciP->RomBase & ~(CARD32)1);
if (scratch && length) {
memcpy((unsigned char *)V_BIOS, scratch, length);
free(scratch);
}
restoreMem(pciP);
return length;
}
CARD32
findPci(CARD16 slotBX)
{
CARD32 slot = slotBX << 8;
if (slot == (CurrentPci->Slot.l & ~PCI_EN))
return (CurrentPci->Slot.l | PCI_EN);
else {
#if !SHOW_ALL_DEV
PciBusPtr pBus = CurrentPci->pBus;
while (pBus) {
/* fprintf(stderr,"slot: 0x%x bridge: 0x%x\n",slot, pBus->Slot.l); */
if (slot == (pBus->Slot.l & ~PCI_EN))
return pBus->Slot.l | PCI_EN;
pBus = pBus->next;
}
#else
PciStructPtr pPci = PciStruct;
while (pPci) {
/*fprintf(stderr,"slot: 0x%x bridge: 0x%x\n",slot, pPci->Slot.l); */
if (slot == (pPci->Slot.l & ~PCI_EN))
return pPci->Slot.l | PCI_EN;
pPci = pPci->next;
}
#endif
}
return 0;
}
CARD16
pciSlotBX(PciStructPtr pPci)
{
return (CARD16)((pPci->Slot.l >> 8) & 0xFFFF);
}
PciStructPtr
findPciDevice(CARD16 vendorID, CARD16 deviceID, char n)
{
PciStructPtr pPci = CurrentPci;
n++;
while (pPci) {
if ((pPci->VendorID == vendorID) && (pPci->DeviceID == deviceID)) {
if (!(--n)) break;
}
pPci = pPci->next;
}
return pPci;
}
PciStructPtr
findPciClass(CARD8 intf, CARD8 subClass, CARD16 class, char n)
{
PciStructPtr pPci = CurrentPci;
n++;
while (pPci) {
if ((pPci->Interface == intf) && (pPci->SubClass == subClass)
&& (pPci->BaseClass == class)) {
if (!(--n)) break;
}
pPci = pPci->next;
}
return pPci;
}
static void
readConfigSpaceCfg1(CARD32 bus, CARD32 dev, CARD32 func, CARD32 *reg)
{
CARD32 config_cmd = PCI_EN | (bus<<16) |
(dev<<11) | (func<<8);
int i;
for (i = 0; i<64;i+=4) {
#ifdef __alpha__
reg[i] = axpPciCfgRead(config_cmd | i);
#else
outl(PCI_MODE1_ADDRESS_REG, config_cmd | i);
reg[i] = inl(PCI_MODE1_DATA_REG);
#endif
#ifdef V86BIOS_DEBUG
P_printf("0x%lx\n",reg[i]);
#endif
}
}
static int
checkSlotCfg1(CARD32 bus, CARD32 dev, CARD32 func)
{
CARD32 config_cmd = PCI_EN | (bus<<16) |
(dev<<11) | (func<<8);
CARD32 reg;
#ifdef __alpha__
reg = axpPciCfgRead(config_cmd);
#else
outl(PCI_MODE1_ADDRESS_REG, config_cmd);
reg = inl(PCI_MODE1_DATA_REG);
#endif
if (reg != 0xFFFFFFFF)
return 1;
else
return 0;
}
static int
checkSlotCfg2(CARD32 bus, int dev)
{
CARD32 val;
outb(PCI_MODE2_ENABLE_REG, 0xF1);
outb(PCI_MODE2_FORWARD_REG, bus);
val = inl(dev << 8);
outb(PCI_MODE2_FORWARD_REG, 0x00);
outb(PCI_MODE2_ENABLE_REG, 0x00);
if (val == 0xFFFFFFFF)
return 0;
if (val == 0xF0F0F0F0)
return 0;
return 1;
}
static void
readConfigSpaceCfg2(CARD32 bus, int dev, CARD32 *reg)
{
int i;
outb(PCI_MODE2_ENABLE_REG, 0xF1);
outb(PCI_MODE2_FORWARD_REG, bus);
for (i = 0; i<64;i+=4) {
reg[i] = inl((dev << 8) + i);
#ifdef V86BIOS_DEBUG
P_printf("0x%lx\n",reg[i]);
#endif
}
outb(PCI_MODE2_ENABLE_REG, 0x00);
}
static CARD8
interpretConfigSpace(CARD32 *reg, int busidx, CARD8 dev, CARD8 func)
{
CARD32 config_cmd;
CARD16 vendor, device;
CARD8 baseclass, subclass;
CARD8 primary, secondary;
CARD8 header, interface;
int i;
config_cmd = PCI_EN | busidx<<16 |
(dev<<11) | (func<<8);
for (i = 0x10; i < 0x28; i+=4) {
if (IS_MEM32(reg[i]))
if ((reg[i] & 0xFFFFFFF0) < pciMinMemReg)
pciMinMemReg = (reg[i] & 0xFFFFFFF0);
#ifdef __alpha__
if (IS_MEM64(reg[i])) {
unsigned long addr = reg[i] |
(unsigned long)(reg[i+4]) << 32;
if ((addr & ~0xfL) < pciMinMemReg)
pciMinMemReg = (addr & ~0xfL);
i+=4;
}
#endif
}
vendor = reg[0] & 0xFFFF;
device = reg[0] >> 16;
P_printf("bus: %i card: %i func %i reg0: 0x%x ", busidx,dev,func,reg[0]);
baseclass = reg[8] >> 24;
subclass = (reg[8] >> 16) & 0xFF;
interface = (reg[8] >> 8) & 0xFF;
header = (reg[0x0c] >> 16) & 0xff;
P_printf("bc 0x%x, sub 0x%x, if 0x%x, hdr 0x%x\n",
baseclass,subclass,interface,header);
if (BRIDGE_CLASS(baseclass)) {
if (BRIDGE_PCI_CLASS(subclass)) {
PciBusPtr pbp = malloc(sizeof(PciBusRec));
P_printf("Pci-Pci Bridge found; ");
primary = reg[0x18] & 0xFF;
secondary = (reg[0x18] >> 8) & 0xFF;
P_printf("primary: 0x%x secondary: 0x%x\n",
primary,secondary);
pbp->bctl = reg[0x3c];
pbp->primary = primary;
pbp->secondary = secondary;
pbp->Slot.l = config_cmd;
pbp->next = PciBuses;
PciBuses = pbp;
numbus++;
} else if (BRIDGE_HOST_CLASS(subclass)
&& (hostbridges++ > 1)) {
numbus++;
}
} else if (VIDEO_CLASS(baseclass,subclass)) {
PciStructPtr pcp = malloc(sizeof(PciStructRec));
P_printf("Display adapter found\n");
pcp->RomBase = reg[0x30];
pcp->cmd_st = reg[4];
pcp->active = (reg[4] & 0x03) == 3 ? 1 : 0;
pcp->VendorID = vendor;
pcp->DeviceID = device;
pcp->Interface = interface;
pcp->BaseClass = baseclass;
pcp->SubClass = subclass;
pcp->Slot.l = config_cmd;
pcp->bus = busidx;
pcp->dev = dev;
pcp->func = func;
pcp->next = PciStruct;
PciStruct = pcp;
}
if ((func == 0)
&& ((header & PCI_MULTIFUNC_DEV) == 0))
func = 8;
else
func++;
return func;
}
static CARD32 remapMEM_val;
static int remapMEM_num;
static int /* map it on some other video device */
remapMem(PciStructPtr pciP, int num, CARD32 size)
{
PciStructPtr pciPtr = PciStruct;
int i;
CARD32 org;
CARD32 val;
CARD32 size_n;
org = PciRead32(num + 0x10,pciP->Slot.l);
while (pciPtr) {
for (i = 0; i < 20; i=i+4) {
val = PciRead32(i + 0x10,pciPtr->Slot.l);
/* don't map it on itself */
if ((org & 0xfffffff0) == (val & 0xfffffff0))
continue;
if (val && !(val & 1))
PciWrite32(i + 0x10,0xffffffff,pciPtr->Slot.l);
else
continue;
size_n = PciRead32(i + 0x10,pciPtr->Slot.l);
PciWrite32(i + 0x10,val,pciPtr->Slot.l);
size_n = ~(CARD32)(size_n & 0xfffffff0) + 1;
if (size_n >= size) {
PciWrite32(num + 0x10,val,pciP->Slot.l);
return 1;
}
}
pciPtr = pciPtr->next;
}
/* last resort: try to go below lowest PCI mem address */
val = ((pciMinMemReg & ~(CARD32)(size - 1)) - size);
if (val > 0x7fffffff) {
PciWrite32(num + 0x10,val, pciP->Slot.l);
return 1;
}
return 0;
}
static void
restoreMem(PciStructPtr pciP)
{
if (remapMEM_val == 0) return;
PciWrite32(remapMEM_num + 0x10,remapMEM_val,pciP->Slot.l);
return;
}
static CARD32
findBIOSMap(PciStructPtr pciP, CARD32 *biosSize)
{
PciStructPtr pciPtr = PciStruct;
int i;
CARD32 val;
CARD32 size;
PciWrite32(0x30,0xffffffff,pciP->Slot.l);
*biosSize = PciRead32(0x30,pciP->Slot.l);
P_printf("bios size: 0x%x\n",*biosSize);
PciWrite32(0x30,pciP->RomBase,pciP->Slot.l);
*biosSize = ~(*biosSize & 0xFFFFFF00) + 1;
P_printf("bios size masked: 0x%x\n",*biosSize);
if (*biosSize > (1024 * 1024 * 16)) {
*biosSize = 1024 * 1024 * 16;
P_printf("fixing broken BIOS size: 0x%x\n",*biosSize);
}
while (pciPtr) {
if (pciPtr->bus != pciP->bus) {
pciPtr = pciPtr->next;
continue;
}
for (i = 0; i < 20; i=i+4) {
val = PciRead32(i + 0x10,pciPtr->Slot.l);
if (!(val & 1))
PciWrite32(i + 0x10,0xffffffff,pciPtr->Slot.l);
else
continue;
size = PciRead32(i + 0x10,pciPtr->Slot.l);
PciWrite32(i + 0x10,val,pciPtr->Slot.l);
size = ~(CARD32)(size & 0xFFFFFFF0) + 1;
#ifdef V86_BIOS_DEBUG
P_printf("size: 0x%x\n",size);
#endif
if (size >= *biosSize) {
if (pciP == pciPtr) { /* if same device remap ram*/
if (!(remapMem(pciP,i,size)))
continue;
remapMEM_val = val;
remapMEM_num = i;
} else {
remapMEM_val = 0;
}
return val & 0xFFFFFF00;
}
}
pciPtr = pciPtr->next;
}
remapMEM_val = 0;
/* very last resort */
if (pciP->bus == 0 && (pciMinMemReg > *biosSize))
return (pciMinMemReg - size) & ~(size - 1);
return 0;
}
int
cfg1out(CARD16 addr, CARD32 val)
{
if (addr == 0xCF8) {
PciCfg1Addr = val;
return 1;
} else if (addr == 0xCFC) {
writePci(PciCfg1Addr, val);
return 1;
}
return 0;
}
int
cfg1in(CARD16 addr, CARD32 *val)
{
if (addr == 0xCF8) {
*val = PciCfg1Addr;
return 1;
} else if (addr == 0xCFC) {
*val = readPci(PciCfg1Addr);
return 1;
}
return 0;
}
void
list_pci(void)
{
PciStructPtr pci = PciList;
while (pci) {
printf("[0x%x:0x%x:0x%x] vendor: 0x%4.4x dev: 0x%4.4x class: 0x%4.4x"
" subclass: 0x%4.4x\n",pci->bus,pci->dev,pci->func,
pci->VendorID,pci->DeviceID,pci->BaseClass,pci->SubClass);
pci = pci->next;
}
}
PciStructPtr
findPciByIDs(int bus, int dev, int func)
{
PciStructPtr pciP = PciList;
while (pciP) {
if (pciP->bus == bus && pciP->dev == dev && pciP->func == func)
return pciP;
pciP = pciP->next;
}
return NULL;
}
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