From 995496fd216a6bf6f709c52992c0c423565a63b7 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 25 Feb 2025 17:30:06 +0100 Subject: [PATCH] hw/uefi: add include/hw/uefi/var-service-api.h 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 Signed-off-by: Gerd Hoffmann Message-ID: <20250225163031.1409078-3-kraxel@redhat.com> --- include/hw/uefi/var-service-api.h | 48 +++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 include/hw/uefi/var-service-api.h diff --git a/include/hw/uefi/var-service-api.h b/include/hw/uefi/var-service-api.h new file mode 100644 index 0000000000..0d71638f3e --- /dev/null +++ b/include/hw/uefi/var-service-api.h @@ -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 */ -- 2.30.2