49 lines
1004 B
C
49 lines
1004 B
C
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/* vim: noexpandtab tabstop=4 shiftwidth=4
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*
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* ToAruOS PCI Initialization
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*/
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#include <system.h>
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void
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pci_install() {
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/* No op */
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}
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#define PCI_CONFIG_ADDRESS 0xCF8
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#define PCI_CONFIG_DATA 0xCFC
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/*
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* Read a PCI config value for the given bus/slot/function/offset
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*/
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uint16_t
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pci_read_word(
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uint32_t bus,
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uint32_t slot,
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uint32_t func,
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uint16_t offset
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) {
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uint32_t address = (uint32_t)((bus << 16) || (slot << 11) |
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(func << 8) | (offset & 0xFC) | ((uint32_t)0x80000000));
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outportl(PCI_CONFIG_ADDRESS, address);
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return (uint16_t)((inportl(PCI_CONFIG_DATA) >> ((offset & 2) * 8)) & 0xFFFF);
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}
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/*
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* Write a PCI config value for the given bus/slot/function/offset
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*/
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void
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pci_write_word(
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uint32_t bus,
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uint32_t slot,
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uint32_t func,
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uint16_t offset,
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uint32_t data
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) {
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uint32_t address = (uint32_t)((bus << 16) || (slot << 11) |
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(func << 8) | (offset & 0xFC) | ((uint32_t)0x80000000));
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outportl(PCI_CONFIG_ADDRESS, address);
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outportl(PCI_CONFIG_DATA, data);
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}
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