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Fixed PCI config base address error

This commit is contained in:
Antoine Cure 2020-02-12 13:15:10 +01:00
parent 65312af6dc
commit 9930a45163
No known key found for this signature in database
GPG Key ID: DCA412F83BD81F24
3 changed files with 12 additions and 30 deletions
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2
Makefile
View File

@ -272,7 +272,7 @@ all :
test: all installonimage
@qemu-system-x86_64 -vga std -enable-kvm -machine type=q35 -soundhw pcspk -cpu host -s \
-rtc base=localtime -m $(ram) -hda $(installdisk) \
-rtc base=localtime -m $(ram) -hda $(installdisk) -net nic,model=rtl8139 \
-d cpu_reset,guest_errors,pcall,int 2> $(BUILDDIR)/qemu.log &
run: test

4
include/io/acpi.h
View File

@ -196,7 +196,7 @@ struct FADT_t
//----------------------------------------------------------------------------//
struct SDT_MCFG_t {
struct MCFG_t {
char signature[4];
uint length;
uchar revision;
@ -209,7 +209,7 @@ struct SDT_MCFG_t {
ulong reserved;
void* pciConfigBaseAddress;
};
} __attribute__ ((packed));
//----------------------------------------------------------------------------//

34
kaleid/kernel/io/pci.c
View File

@ -44,25 +44,13 @@ static inline void* pciGetConfigAddr(uchar bus, uchar device, uchar function, us
KernLog("pciGetConfigAddr(): bad register offset\n");
return 0;
}
ulong addr = bus*32*8*4096 + device*8*4096 + function*4096 + offset + (ulong)pciConfigBaseAddress;
// DEBUG
KernLog("bus: %u\n", bus);
KernLog("device: %u\n", device);
KernLog("function: %u\n", function);
KernLog("offset: %u\n", offset);
KernLog("ADDR: %lx\n", addr);
KernLog("ADDR: %p\n", (void*)addr);
return (void*)addr;
return (void*)(bus*32*8*4096 + device*8*4096 + function*4096 + offset + (ulong)pciConfigBaseAddress);
}
uchar pciReadConfigByte(uchar bus, uchar device, uchar function, ushort offset)
{
uchar *ptr = (uchar*)(pciGetConfigAddr(bus, device, function, offset));
KernLog("ADDR_uchar*: %p\n", ptr);
uchar value = *ptr;
//KernLog("VALUE: %u\n\n", value);
return *ptr;
return *((uchar*)(pciGetConfigAddr(bus, device, function, offset)));
}
ushort pciReadConfigWord(uchar bus, uchar device, uchar function, ushort offset)
@ -81,34 +69,28 @@ void pciScanAll()
KernLog("Unable to access PCI configuration : MCFG table not reachable\n");
return;
}
//KernLog("%x", pciReadConfigByte(0, 0, 0, 0));
uchar byte = pciReadConfigByte(0, 0, 0, 0);
/*
for(uchar bus = 0; bus < 256; bus++) {
for(uchar bus = 0; bus < 255; bus++) {
for(uchar device = 0; device < 32; device++) {
for(uchar function = 0; function < 8; function++) {
ushort vendor = pciReadWord(bus, device, function, PCI_REG_VENDOR);
ushort vendor = pciReadConfigWord(bus, device, function, PCI_REG_VENDOR);
if(vendor == 0xffff) continue;
KernLog("PCI device found ! vendor: %x, device: %x\n", vendor, pciReadWord(bus, device, function, PCI_REG_DEVICE));
DebugLog("PCI device found ! vendor: %x, device: %x\n", vendor, pciReadConfigWord(bus, device, function, PCI_REG_DEVICE));
}
}
}
*/
}
void IoInitPCI()
{
struct SDT_MCFG_t *MCFG_table = (struct SDT_MCFG_t*)IoGetAcpiTable(SDT_MCFG);
struct MCFG_t *MCFG_table = (struct MCFG_t*)IoGetAcpiTable(SDT_MCFG);
if(MCFG_table == NULL) {
KernLog("Unable to access PCI configuration : MCFG table not reachable\n");
}
pciConfigBaseAddress = MCFG_table->pciConfigBaseAddress;
DebugLog("PCI Config Base address = 0x%p\n", pciConfigBaseAddress);
// 0x ff00 0000 0000 0000
MmMapPage(pciConfigBaseAddress, pciConfigBaseAddress + 256*1024*1024, PRESENT | READWRITE);
pciScanAll();
}