u-boot/arch/x86/include/asm/fw_cfg.h
Miao Yan fa287b1580 x86: qemu: add the ability to load and link ACPI tables from QEMU
This patch adds the ability to load and link ACPI tables provided by QEMU.
QEMU tells guests how to load and patch ACPI tables through its fw_cfg
interface, by adding a firmware file 'etc/table-loader'. Guests are
supposed to parse this file and execute corresponding QEMU commands.

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-28 13:53:30 +08:00

157 lines
3.6 KiB
C

/*
* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __FW_CFG__
#define __FW_CFG__
#define FW_CONTROL_PORT 0x510
#define FW_DATA_PORT 0x511
#define FW_DMA_PORT_LOW 0x514
#define FW_DMA_PORT_HIGH 0x518
#include <linux/list.h>
enum qemu_fwcfg_items {
FW_CFG_SIGNATURE = 0x00,
FW_CFG_ID = 0x01,
FW_CFG_UUID = 0x02,
FW_CFG_RAM_SIZE = 0x03,
FW_CFG_NOGRAPHIC = 0x04,
FW_CFG_NB_CPUS = 0x05,
FW_CFG_MACHINE_ID = 0x06,
FW_CFG_KERNEL_ADDR = 0x07,
FW_CFG_KERNEL_SIZE = 0x08,
FW_CFG_KERNEL_CMDLINE = 0x09,
FW_CFG_INITRD_ADDR = 0x0a,
FW_CFG_INITRD_SIZE = 0x0b,
FW_CFG_BOOT_DEVICE = 0x0c,
FW_CFG_NUMA = 0x0d,
FW_CFG_BOOT_MENU = 0x0e,
FW_CFG_MAX_CPUS = 0x0f,
FW_CFG_KERNEL_ENTRY = 0x10,
FW_CFG_KERNEL_DATA = 0x11,
FW_CFG_INITRD_DATA = 0x12,
FW_CFG_CMDLINE_ADDR = 0x13,
FW_CFG_CMDLINE_SIZE = 0x14,
FW_CFG_CMDLINE_DATA = 0x15,
FW_CFG_SETUP_ADDR = 0x16,
FW_CFG_SETUP_SIZE = 0x17,
FW_CFG_SETUP_DATA = 0x18,
FW_CFG_FILE_DIR = 0x19,
FW_CFG_FILE_FIRST = 0x20,
FW_CFG_WRITE_CHANNEL = 0x4000,
FW_CFG_ARCH_LOCAL = 0x8000,
FW_CFG_INVALID = 0xffff,
};
enum {
BIOS_LINKER_LOADER_COMMAND_ALLOCATE = 0x1,
BIOS_LINKER_LOADER_COMMAND_ADD_POINTER = 0x2,
BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM = 0x3,
};
enum {
BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH = 0x1,
BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2,
};
#define FW_CFG_FILE_SLOTS 0x10
#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST + FW_CFG_FILE_SLOTS)
#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)
#define FW_CFG_MAX_FILE_PATH 56
#define BIOS_LINKER_LOADER_FILESZ FW_CFG_MAX_FILE_PATH
#define QEMU_FW_CFG_SIGNATURE (('Q' << 24) | ('E' << 16) | ('M' << 8) | 'U')
#define FW_CFG_DMA_ERROR (1 << 0)
#define FW_CFG_DMA_READ (1 << 1)
#define FW_CFG_DMA_SKIP (1 << 2)
#define FW_CFG_DMA_SELECT (1 << 3)
#define FW_CFG_DMA_ENABLED (1 << 1)
struct fw_cfg_file {
__be32 size;
__be16 select;
__be16 reserved;
char name[FW_CFG_MAX_FILE_PATH];
};
struct fw_file {
struct fw_cfg_file cfg; /* firmware file information */
unsigned long addr; /* firmware file in-memory address */
struct list_head list; /* list node to link to fw_list */
};
struct fw_cfg_dma_access {
__be32 control;
__be32 length;
__be64 address;
};
struct bios_linker_entry {
__le32 command;
union {
/*
* COMMAND_ALLOCATE - allocate a table from @alloc.file
* subject to @alloc.align alignment (must be power of 2)
* and @alloc.zone (can be HIGH or FSEG) requirements.
*
* Must appear exactly once for each file, and before
* this file is referenced by any other command.
*/
struct {
char file[BIOS_LINKER_LOADER_FILESZ];
__le32 align;
uint8_t zone;
} alloc;
/*
* COMMAND_ADD_POINTER - patch the table (originating from
* @dest_file) at @pointer.offset, by adding a pointer to the
* table originating from @src_file. 1,2,4 or 8 byte unsigned
* addition is used depending on @pointer.size.
*/
struct {
char dest_file[BIOS_LINKER_LOADER_FILESZ];
char src_file[BIOS_LINKER_LOADER_FILESZ];
__le32 offset;
uint8_t size;
} pointer;
/*
* COMMAND_ADD_CHECKSUM - calculate checksum of the range
* specified by @cksum_start and @cksum_length fields,
* and then add the value at @cksum.offset.
* Checksum simply sums -X for each byte X in the range
* using 8-bit math.
*/
struct {
char file[BIOS_LINKER_LOADER_FILESZ];
__le32 offset;
__le32 start;
__le32 length;
} cksum;
/* padding */
char pad[124];
};
} __packed;
/**
* Initialize QEMU fw_cfg interface
*/
void qemu_fwcfg_init(void);
/**
* Get system cpu number
*
* @return: cpu number in system
*/
int qemu_fwcfg_online_cpus(void);
#endif