Add initial PCI support#238
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Signed-off-by: Connor Davis <connojd@amazon.com>
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wipawel
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Jan 12, 2022
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FYI I was going to add support for mapping BARs as a follow on commit, but wanted to get early feedback before starting that. In case you wanted to keep the issue open until the BAR mapping stuff is in |
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wipawel
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Jan 18, 2022
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Nah no need to delay, let's get this PR in. |
Add probe_pci, probe_pci_bus, probe_pci_dev and init_pci functions. init_pci is called from kernel_start to setup the PCI subsystem. In turn, init_pci calls probe_pci, which initializes the host bridge and then recursively enumerates the rest of the PCI devices on the system by calling probe_pci_bus/probe_pci_dev. Each device's basic config space is stored in the pcidev_t structure, along with a pointer to the device's parent bridge and a list_head_t node. When a device is found, it is added to the global pci_list structure for later reference. Signed-off-by: Connor Davis <connojd@amazon.com>
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should be good to go now |
wipawel
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Jan 18, 2022
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The first patch of this series fixes a small typo. The second adds code for enumerating PCI devices