u-boot/include/qfw.h
Simon Glass baaeb92c21 x86: Move qemu CPU fixup function into its own file
This function is specific to qemu so it seems best to keep it separate
from the generic code.

Move it out to a new file and update the condition to use if() instead of
 #ifdef

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-12-15 11:44:25 +08:00

184 lines
4.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
*/
#ifndef __FW_CFG__
#define __FW_CFG__
#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_file_iter {
struct list_head *entry; /* structure to iterate file list */
};
struct fw_cfg_dma_access {
__be32 control;
__be32 length;
__be64 address;
};
struct fw_cfg_arch_ops {
void (*arch_read_pio)(uint16_t selector, uint32_t size,
void *address);
void (*arch_read_dma)(struct fw_cfg_dma_access *dma);
};
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
*
* @ops: arch specific read operations
*/
void qemu_fwcfg_init(struct fw_cfg_arch_ops *ops);
void qemu_fwcfg_read_entry(uint16_t entry, uint32_t length, void *address);
int qemu_fwcfg_read_firmware_list(void);
struct fw_file *qemu_fwcfg_find_file(const char *name);
/**
* Get system cpu number
*
* @return: cpu number in system
*/
int qemu_fwcfg_online_cpus(void);
/* helper functions to iterate firmware file list */
struct fw_file *qemu_fwcfg_file_iter_init(struct fw_cfg_file_iter *iter);
struct fw_file *qemu_fwcfg_file_iter_next(struct fw_cfg_file_iter *iter);
bool qemu_fwcfg_file_iter_end(struct fw_cfg_file_iter *iter);
bool qemu_fwcfg_present(void);
bool qemu_fwcfg_dma_present(void);
/**
* qemu_cpu_fixup() - Fix up the CPUs for QEMU
*
* @return 0 if OK, -ENODEV if no CPUs, -ENOMEM if out of memory, other -ve on
* on other error
*/
int qemu_cpu_fixup(void);
#endif