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Diffstat (limited to 'qemu/docs/specs/acpi_pci_hotplug.txt')
| -rw-r--r-- | qemu/docs/specs/acpi_pci_hotplug.txt | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/qemu/docs/specs/acpi_pci_hotplug.txt b/qemu/docs/specs/acpi_pci_hotplug.txt deleted file mode 100644 index a839434f3..000000000 --- a/qemu/docs/specs/acpi_pci_hotplug.txt +++ /dev/null @@ -1,45 +0,0 @@ -QEMU<->ACPI BIOS PCI hotplug interface --------------------------------------- - -QEMU supports PCI hotplug via ACPI, for PCI bus 0. This document -describes the interface between QEMU and the ACPI BIOS. - -ACPI GPE block (IO ports 0xafe0-0xafe3, byte access): ------------------------------------------ - -Generic ACPI GPE block. Bit 1 (GPE.1) used to notify PCI hotplug/eject -event to ACPI BIOS, via SCI interrupt. - -PCI slot injection notification pending (IO port 0xae00-0xae03, 4-byte access): ---------------------------------------------------------------- -Slot injection notification pending. One bit per slot. - -Read by ACPI BIOS GPE.1 handler to notify OS of injection -events. Read-only. - -PCI slot removal notification (IO port 0xae04-0xae07, 4-byte access): ------------------------------------------------------ -Slot removal notification pending. One bit per slot. - -Read by ACPI BIOS GPE.1 handler to notify OS of removal -events. Read-only. - -PCI device eject (IO port 0xae08-0xae0b, 4-byte access): ----------------------------------------- - -Write: Used by ACPI BIOS _EJ0 method to request device removal. -One bit per slot. - -Read: Hotplug features register. Used by platform to identify features -available. Current base feature set (no bits set): - - Read-only "up" register @0xae00, 4-byte access, bit per slot - - Read-only "down" register @0xae04, 4-byte access, bit per slot - - Read/write "eject" register @0xae08, 4-byte access, - write: bit per slot eject, read: hotplug feature set - - Read-only hotplug capable register @0xae0c, 4-byte access, bit per slot - -PCI removability status (IO port 0xae0c-0xae0f, 4-byte access): ------------------------------------------------ - -Used by ACPI BIOS _RMV method to indicate removability status to OS. One -bit per slot. Read-only |