1 /* 2 * SPDX-License-Identifier: GPL-2.0-or-later 3 * 4 * uefi-vars device - API of the virtual device for guest/host communication. 5 */ 6 #ifndef QEMU_UEFI_VAR_SERVICE_API_H 7 #define QEMU_UEFI_VAR_SERVICE_API_H 8 9 /* qom: device names */ 10 #define TYPE_UEFI_VARS_X64 "uefi-vars-x64" 11 #define TYPE_UEFI_VARS_SYSBUS "uefi-vars-sysbus" 12 13 /* sysbus: fdt node path */ 14 #define UEFI_VARS_FDT_NODE "qemu-uefi-vars" 15 #define UEFI_VARS_FDT_COMPAT "qemu,uefi-vars" 16 17 /* registers */ 18 #define UEFI_VARS_REG_MAGIC 0x00 /* 16 bit */ 19 #define UEFI_VARS_REG_CMD_STS 0x02 /* 16 bit */ 20 #define UEFI_VARS_REG_BUFFER_SIZE 0x04 /* 32 bit */ 21 #define UEFI_VARS_REG_DMA_BUFFER_ADDR_LO 0x08 /* 32 bit */ 22 #define UEFI_VARS_REG_DMA_BUFFER_ADDR_HI 0x0c /* 32 bit */ 23 #define UEFI_VARS_REG_PIO_BUFFER_TRANSFER 0x10 /* 8-64 bit */ 24 #define UEFI_VARS_REG_PIO_BUFFER_CRC32C 0x18 /* 32 bit (read-only) */ 25 #define UEFI_VARS_REG_FLAGS 0x1c /* 32 bit */ 26 #define UEFI_VARS_REGS_SIZE 0x20 27 28 /* flags register */ 29 #define UEFI_VARS_FLAG_USE_PIO (1 << 0) 30 31 /* magic value */ 32 #define UEFI_VARS_MAGIC_VALUE 0xef1 33 34 /* command values */ 35 #define UEFI_VARS_CMD_RESET 0x01 36 #define UEFI_VARS_CMD_DMA_MM 0x02 37 #define UEFI_VARS_CMD_PIO_MM 0x03 38 #define UEFI_VARS_CMD_PIO_ZERO_OFFSET 0x04 39 40 /* status values */ 41 #define UEFI_VARS_STS_SUCCESS 0x00 42 #define UEFI_VARS_STS_BUSY 0x01 43 #define UEFI_VARS_STS_ERR_UNKNOWN 0x10 44 #define UEFI_VARS_STS_ERR_NOT_SUPPORTED 0x11 45 #define UEFI_VARS_STS_ERR_BAD_BUFFER_SIZE 0x12 46 47 48 #endif /* QEMU_UEFI_VAR_SERVICE_API_H */ 49