fb1e414a09
-Add a bus manager level, which is an object oriented walk of the pci busses to build a per device object for later manipulation. -Add features to enable MSI interrupts. -Extend generic interrupt api to allow the platform to allocate vectors for MSI interrupts. -Rearrange a bit of the pc platform for the platform api changes. -Add PC platform support for using the local apic to EOI MSI vectors. -Fix up a few existing PCI drivers for small API changes. -Add a few stubbed out routines for non PC platforms that use PCI.
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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* Copyright (c) 2021 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#pragma once
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#include "pci_backend.h"
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#include <stdint.h>
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class pci_bios32 final : public pci_backend {
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#if ARCH_X86_32
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public:
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virtual ~pci_bios32() = default;
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// factory to detect and create an instance
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static pci_bios32 *detect();
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// a few overridden methods
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virtual int read_config_byte(pci_location_t state, uint32_t reg, uint8_t *value) override;
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virtual int read_config_half(pci_location_t state, uint32_t reg, uint16_t *value) override;
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virtual int read_config_word(pci_location_t state, uint32_t reg, uint32_t *value) override;
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virtual int write_config_byte(pci_location_t state, uint32_t reg, uint8_t value) override;
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virtual int write_config_half(pci_location_t state, uint32_t reg, uint16_t value) override;
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virtual int write_config_word(pci_location_t state, uint32_t reg, uint32_t value) override;
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private:
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// far call structure used by BIOS32 routines
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struct bios32_entry {
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uint32_t offset;
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uint16_t selector;
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} __PACKED;
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// only created via the detect() factory
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explicit pci_bios32(bios32_entry b32_entry) : bios32_entry_(b32_entry) {}
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bios32_entry bios32_entry_ {};
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#else // !ARCH_X86_32
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// not present on anything but x86-32
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public:
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static pci_bios32 *detect() { return nullptr; }
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#endif
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};
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