blob: 24bc607a0a1940d803fd7717d7555f9c0ca6900f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Arch/x86/IO.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/Access.h>
#include <Kernel/Bus/PCI/Initializer.h>
#include <Kernel/Bus/PCI/SysFSPCI.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Firmware/ACPI/Parser.h>
#include <Kernel/Panic.h>
#include <Kernel/Sections.h>
namespace Kernel {
namespace PCI {
static bool test_pci_io();
UNMAP_AFTER_INIT static PCIAccessLevel detect_optimal_access_type()
{
auto boot_determined = kernel_command_line().pci_access_level();
if (!ACPI::is_enabled() || !ACPI::Parser::the()->find_table("MCFG").has_value())
return PCIAccessLevel::IOAddressing;
if (boot_determined != PCIAccessLevel::IOAddressing)
return boot_determined;
if (test_pci_io())
return PCIAccessLevel::IOAddressing;
PANIC("No PCI bus access method detected!");
}
UNMAP_AFTER_INIT void initialize()
{
switch (detect_optimal_access_type()) {
case PCIAccessLevel::MemoryAddressing: {
auto mcfg = ACPI::Parser::the()->find_table("MCFG");
VERIFY(mcfg.has_value());
auto success = Access::initialize_for_memory_access(mcfg.value());
VERIFY(success);
break;
}
case PCIAccessLevel::IOAddressing: {
auto success = Access::initialize_for_io_access();
VERIFY(success);
break;
}
default:
VERIFY_NOT_REACHED();
}
PCI::PCIBusSysFSDirectory::initialize();
PCI::enumerate([&](DeviceIdentifier const& device_identifier) {
dmesgln("{} {}", device_identifier.address(), device_identifier.hardware_id());
});
}
UNMAP_AFTER_INIT bool test_pci_io()
{
dmesgln("Testing PCI via manual probing...");
u32 tmp = 0x80000000;
IO::out32(PCI::address_port, tmp);
tmp = IO::in32(PCI::address_port);
if (tmp == 0x80000000) {
dmesgln("PCI IO supported");
return true;
}
dmesgln("PCI IO not supported");
return false;
}
}
}
|
