motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/uefi: add include/hw/uefi/var-service-api.h

Browse source 
This file defines the register interface of the uefi-vars device.
It's only a handful of registers: magic value, command and status
registers, location and size of the communication buffer.

Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-ID: <20250225163031.1409078-3-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2025-02-25 17:30:06 +01:00
parent 8d127aa866
commit 995496fd21
1 changed files with 48 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

48
include/hw/uefi/var-service-api.h Normal file
View file

@ -0,0 +1,48 @@
/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* uefi-vars device - API of the virtual device for guest/host communication.
*/
#ifndef QEMU_UEFI_VAR_SERVICE_API_H
#define QEMU_UEFI_VAR_SERVICE_API_H
/* qom: device names */
#define TYPE_UEFI_VARS_X64 "uefi-vars-x64"
#define TYPE_UEFI_VARS_SYSBUS "uefi-vars-sysbus"
/* sysbus: fdt node path */
#define UEFI_VARS_FDT_NODE "qemu-uefi-vars"
#define UEFI_VARS_FDT_COMPAT "qemu,uefi-vars"
/* registers */
#define UEFI_VARS_REG_MAGIC 0x00 /* 16 bit */
#define UEFI_VARS_REG_CMD_STS 0x02 /* 16 bit */
#define UEFI_VARS_REG_BUFFER_SIZE 0x04 /* 32 bit */
#define UEFI_VARS_REG_DMA_BUFFER_ADDR_LO 0x08 /* 32 bit */
#define UEFI_VARS_REG_DMA_BUFFER_ADDR_HI 0x0c /* 32 bit */
#define UEFI_VARS_REG_PIO_BUFFER_TRANSFER 0x10 /* 8-64 bit */
#define UEFI_VARS_REG_PIO_BUFFER_CRC32C 0x18 /* 32 bit (read-only) */
#define UEFI_VARS_REG_FLAGS 0x1c /* 32 bit */
#define UEFI_VARS_REGS_SIZE 0x20
/* flags register */
#define UEFI_VARS_FLAG_USE_PIO (1 << 0)
/* magic value */
#define UEFI_VARS_MAGIC_VALUE 0xef1
/* command values */
#define UEFI_VARS_CMD_RESET 0x01
#define UEFI_VARS_CMD_DMA_MM 0x02
#define UEFI_VARS_CMD_PIO_MM 0x03
#define UEFI_VARS_CMD_PIO_ZERO_OFFSET 0x04
/* status values */
#define UEFI_VARS_STS_SUCCESS 0x00
#define UEFI_VARS_STS_BUSY 0x01
#define UEFI_VARS_STS_ERR_UNKNOWN 0x10
#define UEFI_VARS_STS_ERR_NOT_SUPPORTED 0x11
#define UEFI_VARS_STS_ERR_BAD_BUFFER_SIZE 0x12
#endif /* QEMU_UEFI_VAR_SERVICE_API_H */