98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef _LINUX_FW_CFG_H
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#define _LINUX_FW_CFG_H
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#include "standard-headers/linux/types.h"
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#define FW_CFG_ACPI_DEVICE_ID "QEMU0002"
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/* selector key values for "well-known" fw_cfg entries */
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#define FW_CFG_SIGNATURE 0x00
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#define FW_CFG_ID 0x01
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#define FW_CFG_UUID 0x02
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#define FW_CFG_RAM_SIZE 0x03
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#define FW_CFG_NOGRAPHIC 0x04
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#define FW_CFG_NB_CPUS 0x05
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#define FW_CFG_MACHINE_ID 0x06
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#define FW_CFG_KERNEL_ADDR 0x07
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#define FW_CFG_KERNEL_SIZE 0x08
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#define FW_CFG_KERNEL_CMDLINE 0x09
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#define FW_CFG_INITRD_ADDR 0x0a
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#define FW_CFG_INITRD_SIZE 0x0b
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#define FW_CFG_BOOT_DEVICE 0x0c
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#define FW_CFG_NUMA 0x0d
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#define FW_CFG_BOOT_MENU 0x0e
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#define FW_CFG_MAX_CPUS 0x0f
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#define FW_CFG_KERNEL_ENTRY 0x10
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#define FW_CFG_KERNEL_DATA 0x11
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#define FW_CFG_INITRD_DATA 0x12
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#define FW_CFG_CMDLINE_ADDR 0x13
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#define FW_CFG_CMDLINE_SIZE 0x14
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#define FW_CFG_CMDLINE_DATA 0x15
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#define FW_CFG_SETUP_ADDR 0x16
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#define FW_CFG_SETUP_SIZE 0x17
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#define FW_CFG_SETUP_DATA 0x18
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#define FW_CFG_FILE_DIR 0x19
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#define FW_CFG_FILE_FIRST 0x20
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#define FW_CFG_FILE_SLOTS_MIN 0x10
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#define FW_CFG_WRITE_CHANNEL 0x4000
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#define FW_CFG_ARCH_LOCAL 0x8000
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#define FW_CFG_ENTRY_MASK (~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL))
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#define FW_CFG_INVALID 0xffff
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/* width in bytes of fw_cfg control register */
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#define FW_CFG_CTL_SIZE 0x02
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/* fw_cfg "file name" is up to 56 characters (including terminating nul) */
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#define FW_CFG_MAX_FILE_PATH 56
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/* size in bytes of fw_cfg signature */
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#define FW_CFG_SIG_SIZE 4
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/* FW_CFG_ID bits */
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#define FW_CFG_VERSION 0x01
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#define FW_CFG_VERSION_DMA 0x02
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/* fw_cfg file directory entry type */
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struct fw_cfg_file {
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uint32_t size;
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uint16_t select;
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uint16_t reserved;
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char name[FW_CFG_MAX_FILE_PATH];
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};
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/* FW_CFG_DMA_CONTROL bits */
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#define FW_CFG_DMA_CTL_ERROR 0x01
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#define FW_CFG_DMA_CTL_READ 0x02
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#define FW_CFG_DMA_CTL_SKIP 0x04
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#define FW_CFG_DMA_CTL_SELECT 0x08
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#define FW_CFG_DMA_CTL_WRITE 0x10
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#define FW_CFG_DMA_SIGNATURE 0x51454d5520434647ULL /* "QEMU CFG" */
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/* Control as first field allows for different structures selected by this
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* field, which might be useful in the future
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*/
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struct fw_cfg_dma_access {
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uint32_t control;
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uint32_t length;
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uint64_t address;
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};
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#define FW_CFG_VMCOREINFO_FILENAME "etc/vmcoreinfo"
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#define FW_CFG_VMCOREINFO_FORMAT_NONE 0x0
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#define FW_CFG_VMCOREINFO_FORMAT_ELF 0x1
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struct fw_cfg_vmcoreinfo {
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uint16_t host_format;
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uint16_t guest_format;
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uint32_t size;
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uint64_t paddr;
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};
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#endif
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