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| author | Gerd Hoffmann <kraxel@redhat.com> | 2025-02-25 17:30:06 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2025-03-04 12:01:42 +0100 |
| commit | 995496fd216a6bf6f709c52992c0c423565a63b7 (patch) | |
| tree | d3db139d73f7ee2d74a9e795bbee4b1805ef27f2 | |
| parent | 8d127aa866a42b36ec6391b025999059dd47cbfd (diff) | |
| download | qemu-995496fd216a6bf6f709c52992c0c423565a63b7.zip qemu-995496fd216a6bf6f709c52992c0c423565a63b7.tar.gz qemu-995496fd216a6bf6f709c52992c0c423565a63b7.tar.bz2 | |
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 <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-ID: <20250225163031.1409078-3-kraxel@redhat.com>
| -rw-r--r-- | include/hw/uefi/var-service-api.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/hw/uefi/var-service-api.h b/include/hw/uefi/var-service-api.h new file mode 100644 index 0000000..0d71638 --- /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 */ |