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/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* These are the qemu firmware config interface defines and structs.
* Copied over from qemu soure tree,
* include/standard-headers/linux/qemu_fw_cfg.h and modified accordingly.
*/
#ifndef FW_CFG_IF_H
#define FW_CFG_IF_H
#include <stdint.h>
enum fw_cfg_enum {
FW_CFG_SIGNATURE,
FW_CFG_ID,
FW_CFG_UUID,
FW_CFG_RAM_SIZE,
FW_CFG_NOGRAPHIC,
FW_CFG_NB_CPUS,
FW_CFG_MACHINE_ID,
FW_CFG_KERNEL_ADDR,
FW_CFG_KERNEL_SIZE,
FW_CFG_KERNEL_CMDLINE,
FW_CFG_INITRD_ADDR,
FW_CFG_INITRD_SIZE,
FW_CFG_BOOT_DEVICE,
FW_CFG_NUMA,
FW_CFG_BOOT_MENU,
FW_CFG_MAX_CPUS,
FW_CFG_KERNEL_ENTRY,
FW_CFG_KERNEL_DATA,
FW_CFG_INITRD_DATA,
FW_CFG_CMDLINE_ADDR,
FW_CFG_CMDLINE_SIZE,
FW_CFG_CMDLINE_DATA,
FW_CFG_SETUP_ADDR,
FW_CFG_SETUP_SIZE,
FW_CFG_SETUP_DATA,
FW_CFG_FILE_DIR
};
#define FW_CFG_FILE_FIRST 0x20
#define FW_CFG_FILE_SLOTS 0x10
#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST+FW_CFG_FILE_SLOTS)
#define FW_CFG_WRITE_CHANNEL 0x4000
#define FW_CFG_ARCH_LOCAL 0x8000
#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)
#define FW_CFG_ACPI_TABLES (FW_CFG_ARCH_LOCAL + 0)
#define FW_CFG_SMBIOS_ENTRIES (FW_CFG_ARCH_LOCAL + 1)
#define FW_CFG_IRQ0_OVERRIDE (FW_CFG_ARCH_LOCAL + 2)
#define FW_CFG_E820_TABLE (FW_CFG_ARCH_LOCAL + 3)
#define FW_CFG_HPET (FW_CFG_ARCH_LOCAL + 4)
#define FW_CFG_INVALID 0xffff
/* width in bytes of fw_cfg control register */
#define FW_CFG_CTL_SIZE 0x02
/* fw_cfg "file name" is up to 56 characters (including terminating nul) */
#define FW_CFG_MAX_FILE_PATH 56
/* size in bytes of fw_cfg signature */
#define FW_CFG_SIG_SIZE 4
typedef struct FWCfgFile {
uint32_t size; /* file size */
uint16_t select; /* write this to 0x510 to read it */
uint16_t reserved;
char name[FW_CFG_MAX_FILE_PATH];
} FWCfgFile;
typedef struct FWCfgFiles {
uint32_t count;
FWCfgFile f[];
} FWCfgFiles;
typedef struct FwCfgE820Entry {
uint64_t address;
uint64_t length;
uint32_t type;
} FwCfgE820Entry __attribute((__aligned__(4)));
#define SMBIOS_FIELD_ENTRY 0
#define SMBIOS_TABLE_ENTRY 1
typedef struct FwCfgSmbios {
uint16_t length;
uint8_t headertype;
uint8_t tabletype;
uint16_t fieldoffset;
} FwCfgSmbios;
/* FW_CFG_ID bits */
#define FW_CFG_VERSION 0x01
#define FW_CFG_VERSION_DMA 0x02
/* FW_CFG_DMA_CONTROL bits */
#define FW_CFG_DMA_CTL_ERROR 0x01
#define FW_CFG_DMA_CTL_READ 0x02
#define FW_CFG_DMA_CTL_SKIP 0x04
#define FW_CFG_DMA_CTL_SELECT 0x08
#define FW_CFG_DMA_CTL_WRITE 0x10
#define FW_CFG_DMA_SIGNATURE 0x51454d5520434647ULL /* "QEMU CFG" */
/* Control as first field allows for different structures selected by this
* field, which might be useful in the future
*/
typedef struct FwCfgDmaAccess {
uint32_t control;
uint32_t length;
uint64_t address;
} FwCfgDmaAccess;
#endif /* FW_CFG_IF_H */
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