forked from AbleOS/ableos
93 lines
1.8 KiB
Plaintext
93 lines
1.8 KiB
Plaintext
.{string, memory, buffer, log} := @use("../../stn/src/lib.hb")
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PCIAddress := struct {
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bus: u8,
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device: u8,
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function: u8,
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}
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PCI_ID := struct {
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vendor: u16,
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device: u16,
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inner: int,
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}
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get_ids := fn(bus: u8, device: u8, function: u8): PCI_ID {
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res := config_read32(bus, device, function, 0)
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dev_id := res >> 16
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dev_id &= 0xFFFF
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vnd_id := res & 0xFFFF
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return PCI_ID.(dev_id, vnd_id, 0)
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}
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PciDeviceInfo := struct {
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header_type: u8,
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device: u8,
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bus: u8,
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device_id: PCI_ID,
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class: u16,
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rev_id: u8,
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}
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calculate_address := fn(bus: u8, device: u8, function: u8, offset: u8): int {
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address := bus << 16
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address |= device << 11
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address |= function << 8
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address |= offset & 0xFC
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address |= 0x80000000
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return address
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}
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get_header_type := fn(bus: u8, device: u8, function: u8): u8 {
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res := config_read32(bus, device, function, 0xC)
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ret := res >> 16
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ret &= 0xFF
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return ret
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}
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check_device := fn(bus: u8, device: u8): PciDeviceInfo {
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pci_id := get_ids(bus, device, 0)
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if pci_id.vendor == 0xFFFF {
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log.warn(":|\0")
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} else {
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log.info(":)\0")
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}
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address := calculate_address(bus, device, 0, 0x8)
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reg2 := config_read32(bus, device, 0, 0x8)
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class := reg2 >> 16 & 0xFFFF
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header_type := get_header_type(bus, device, 0)
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rev_id := reg2 & 0xFF
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return PciDeviceInfo.(header_type, device, bus, pci_id, class, rev_id)
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}
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find_device := fn(vendor_id: int, device_id: int, pci_address: PCIAddress): PCI_ID {
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pci_id := get_ids(0, 2, 0)
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return pci_id
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}
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scan_bus := fn(): void {
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}
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config_read32 := fn(bus: u32, device: u32, func: u32, offset: u32): u32 {
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// construct address param
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offset_and := offset & 0xFC
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address := bus << 16
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address |= device << 11
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address |= func << 8
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address |= offset_and
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address |= 0x80000000
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// write address
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memory.outl(0xCF8, address)
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// read data
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return memory.inl(0xCFC)
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} |