e5ffa960d7
The new PCI subsystem is initialized during runtime. PCI::Initializer is supposed to be called during early boot, to perform a few tests, and initialize the proper configuration space access mechanism. Kernel boot parameters can be specified by a user to determine what tests will occur, to aid debugging on problematic machines. After that, PCI::Initializer should be dismissed. PCI::IOAccess is a class that is derived from PCI::Access class and implements PCI configuration space access mechanism via x86 IO ports. PCI::MMIOAccess is a class that is derived from PCI::Access and implements PCI configurtaion space access mechanism via memory access. The new PCI subsystem also supports determination of IO/MMIO space needed by a device by checking a given BAR. In addition, Every device or component that use the PCI subsystem has changed to match the last changes.
25 lines
No EOL
931 B
C++
25 lines
No EOL
931 B
C++
#pragma once
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#include <Kernel/PCI/Access.h>
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class PCI::IOAccess final : public PCI::Access {
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public:
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static void initialize();
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virtual void enumerate_all(Function<void(Address, ID)>&) override final;
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virtual String get_access_type() override final { return "IO-Access"; };
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protected:
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IOAccess();
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private:
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virtual u8 read8_field(Address address, u32) override final;
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virtual u16 read16_field(Address address, u32) override final;
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virtual u32 read32_field(Address address, u32) override final;
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virtual void write8_field(Address address, u32, u8) override final;
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virtual void write16_field(Address address, u32, u16) override final;
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virtual void write32_field(Address address, u32, u32) override final;
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virtual uint32_t get_segments_count() { return 1; };
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virtual uint8_t get_segment_start_bus(u32) { return 0x0; };
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virtual uint8_t get_segment_end_bus(u32) { return 0xFF; };
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}; |