/****************************************************************************
PARAMETERS:
pcidev - PCI device info for the video card on the bus to boot
VGAInfo - BIOS emulator VGA info structure
REMARKS:
This function executes the BIOS POST code on the controller. We assume that
at this stage the controller has its I/O and memory space enabled and
that all other controllers are in a disabled state.
****************************************************************************/
static void PCI_doBIOSPOST(pci_dev_t pcidev, BE_VGAInfo * VGAInfo)
{
RMREGS regs;
RMSREGS sregs;
/* Determine the value to store in AX for BIOS POST. Per the PCI specs,
AH must contain the bus and AL must contain the devfn, encoded as
(dev << 3) | fn
*/
memset(®s, 0, sizeof(regs));
memset(&sregs, 0, sizeof(sregs));
regs.x.ax = ((int)PCI_BUS(pcidev) << 8) |
((int)PCI_DEV(pcidev) << 3) | (int)PCI_FUNC(pcidev);
/*Setup the X86 emulator for the VGA BIOS*/
BE_setVGA(VGAInfo);
/*Execute the BIOS POST code*/
BE_callRealMode(0xC000, 0x0003, ®s, &sregs);
/*Cleanup and exit*/
BE_getVGA(VGAInfo);
}
int vga_bios_init(void)
{
struct pci_device *pdev;
unsigned long romsize = 0;
unsigned long romaddress = 0;
unsigned char magic[2];
unsigned short ppcidata; /* pointer to pci data structure */
unsigned char pcisig[4]; /* signature of pci data structure */
unsigned char codetype;
/* unsigned int vesa_mode = 0;*/
int XGIZ9_ROM = 0;
if (vga_dev != NULL)
{
pdev = vga_dev;
printf("Found VGA device: vendor=0x%04x, device=0x%04x\n",
PCI_VENDOR(pdev->pa.pa_id),pdev->pa.pa_device);
if (PCI_VENDOR(pdev->pa.pa_id) == 0x1002 && pdev->pa.pa_device == 0x4750)
BE_wrw(0xc015e,0x4750);
if (PCI_VENDOR((pdev->pa.pa_id) == 0x102b)) {
printf("skipping matrox cards\n");
return -1;
}
pci_read_config_dword(pdev,0x30,(int*)&romaddress);
romaddress &= (~1);
/* enable rom address decode */
pci_write_config_dword(pdev,0x30,romaddress|1);
if (romaddress == 0) {
printf("No rom address assigned,skipped\n");
return -1;
}
#ifdef BONITOEL
romaddress |= 0x10000000;
#endif
printf("Rom mapped to %lx\n",romaddress);
magic[0] = readb(romaddress);
magic[1] = readb(romaddress + 1);
if (magic[0]==0x55 && magic[1]==0xaa) {
printf("VGA bios found\n");
/* rom size is stored at offset 2,in 512 byte unit*/
romsize = (readb(romaddress + 2)) * 512;
printf("rom size is %ldk\n",romsize/1024);
ppcidata = readw(romaddress + 0x18);
printf("PCI data structure at offset %x\n",ppcidata);
pcisig[0] = readb(romaddress + ppcidata);
pcisig[1] = readb(romaddress + ppcidata + 1);
pcisig[2] = readb(romaddress + ppcidata + 2);
pcisig[3] = readb(romaddress + ppcidata + 3);
if (pcisig[0]!='P' || pcisig[1]!='C' ||
pcisig[2]!='I' || pcisig[3]!='R') {
printf("PCIR expected,read %c%c%c%c\n",
pcisig[0],pcisig[1],pcisig[2],pcisig[3]);
printf("Invalid pci signature found,give up\n");
return -1;
}
codetype = readb(romaddress + ppcidata + 0x14);
if (codetype != 0) {
printf("Not x86 code in rom,give up\n");
return -1;
}
} else {
#ifdef HAVE_XGIZ9_ROM
romaddress = z9sl10810_rom_data;
XGIZ9_ROM = 1;
romsize = (readb(romaddress + 2)) * 512;
#else
printf("No valid bios found,magic=%x%x\n",magic[0],magic[1]);
return -1;
#endif
}
memset(VGAInfo,0,sizeof(BE_VGAInfo));
VGAInfo[0].pciInfo = pdev;
VGAInfo[0].BIOSImage = (void*)malloc(romsize);
if (VGAInfo[0].BIOSImage == NULL) {
printf("Error alloc memory for vgabios\n");
return -1;
}
VGAInfo[0].BIOSImageLen = romsize;
if (XGIZ9_ROM == 1)
memcpy(VGAInfo[0].BIOSImage,(char*)romaddress,romsize);
else
memcpy(VGAInfo[0].BIOSImage,(char*)(0xa0000000|romaddress),romsize);
BE_init(debugFlags,65536,&VGAInfo[0]);
regs.h.ah = pdev->pa.pa_bus;
regs.h.al = (pdev->pa.pa_device<<3)|(pdev->pa.pa_function&0x7);
// Execute the BIOS POST code
#ifdef DEBUG_EMU_VGA
X86EMU_trace_on();
#endif
BE_callRealMode(0xC000,0x0003,®s,&sregs);
#if 0
{
RMREGS in;
RMREGS out;
in.e.eax = 0x0003;
BE_int86(0x10,&in,&out);
}
#endif
if (XGIZ9_ROM == 0)
{
//BE_exit();
pci_read_config_dword(pdev,0x30,(int*)&romaddress);
/* disable rom address decode */
pci_write_config_dword(pdev,0x30,romaddress & ~1);
}
printf("vgabios_init: Emulation done\n");
vga_available = 1;
return 1;
} else{
printf("No VGA PCI device available\n");
return -1;
}
}