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Kernel/PCI: Add a bunch of debug output to accessors

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This was useful for debugging this issue.
This commit is contained in:
Luke 2020-12-22 04:22:32 +00:00 • committed by Andreas Kling
parent 9ab9e548f4
commit 69d7a34bc2
3 changed files with 90 additions and 9 deletions
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29
Kernel/PCI/IOAccess.cpp
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@ -27,13 +27,19 @@
#include <Kernel/IO.h>
#include <Kernel/PCI/IOAccess.h>
//#define PCI_DEBUG
namespace Kernel {
namespace PCI {
void IOAccess::initialize()
{
if (!Access::is_initialized())
if (!Access::is_initialized()) {
new IOAccess();
#ifdef PCI_DEBUG
dbg() << "PCI: IO access initialised.";
#endif
}
}
IOAccess::IOAccess()
@ -46,37 +52,58 @@ IOAccess::IOAccess()
u8 IOAccess::read8_field(Address address, u32 field)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Reading 8-bit field 0x" << String::formatted("{:08x}", field) << " for " << address;
#endif
return Access::early_read8_field(address, field);
}
u16 IOAccess::read16_field(Address address, u32 field)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Reading 16-bit field 0x" << String::formatted("{:08x}", field) << " for " << address;
#endif
return Access::early_read16_field(address, field);
}
u32 IOAccess::read32_field(Address address, u32 field)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Reading 32-bit field 0x" << String::formatted("{:08x}", field) << " for " << address;
#endif
return Access::early_read32_field(address, field);
}
void IOAccess::write8_field(Address address, u32 field, u8 value)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Writing to 8-bit field 0x" << String::formatted("{:08x}", field) << ", value=0x" << String::formatted("{:02x}", value) << " for " << address;
#endif
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
IO::out8(PCI_VALUE_PORT + (field & 3), value);
}
void IOAccess::write16_field(Address address, u32 field, u16 value)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Writing to 16-bit field 0x" << String::formatted("{:08x}", field) << ", value=0x" << String::formatted("{:04x}", value) << " for " << address;
#endif
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
IO::out16(PCI_VALUE_PORT + (field & 2), value);
}
void IOAccess::write32_field(Address address, u32 field, u32 value)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO Writing to 32-bit field 0x" << String::formatted("{:08x}", field) << ", value=0x" << String::formatted("{:08x}", value) << " for " << address;
#endif
IO::out32(PCI_ADDRESS_PORT, address.io_address_for_field(field));
IO::out32(PCI_VALUE_PORT, value);
}
void IOAccess::enumerate_hardware(Function<void(Address, ID)> callback)
{
#ifdef PCI_DEBUG
dbg() << "PCI: IO enumerating hardware";
#endif
// Single PCI host controller.
if ((read8_field(Address(), PCI_HEADER_TYPE) & 0x80) == 0) {
enumerate_bus(-1, 0, callback);