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