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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
176 lines
4.3 KiB
C
176 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
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*/
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#ifndef __FW_CFG__
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#define __FW_CFG__
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#include <linux/list.h>
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enum qemu_fwcfg_items {
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FW_CFG_SIGNATURE = 0x00,
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FW_CFG_ID = 0x01,
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FW_CFG_UUID = 0x02,
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FW_CFG_RAM_SIZE = 0x03,
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FW_CFG_NOGRAPHIC = 0x04,
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FW_CFG_NB_CPUS = 0x05,
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FW_CFG_MACHINE_ID = 0x06,
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FW_CFG_KERNEL_ADDR = 0x07,
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FW_CFG_KERNEL_SIZE = 0x08,
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FW_CFG_KERNEL_CMDLINE = 0x09,
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FW_CFG_INITRD_ADDR = 0x0a,
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FW_CFG_INITRD_SIZE = 0x0b,
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FW_CFG_BOOT_DEVICE = 0x0c,
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FW_CFG_NUMA = 0x0d,
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FW_CFG_BOOT_MENU = 0x0e,
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FW_CFG_MAX_CPUS = 0x0f,
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FW_CFG_KERNEL_ENTRY = 0x10,
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FW_CFG_KERNEL_DATA = 0x11,
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FW_CFG_INITRD_DATA = 0x12,
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FW_CFG_CMDLINE_ADDR = 0x13,
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FW_CFG_CMDLINE_SIZE = 0x14,
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FW_CFG_CMDLINE_DATA = 0x15,
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FW_CFG_SETUP_ADDR = 0x16,
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FW_CFG_SETUP_SIZE = 0x17,
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FW_CFG_SETUP_DATA = 0x18,
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FW_CFG_FILE_DIR = 0x19,
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FW_CFG_FILE_FIRST = 0x20,
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FW_CFG_WRITE_CHANNEL = 0x4000,
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FW_CFG_ARCH_LOCAL = 0x8000,
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FW_CFG_INVALID = 0xffff,
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};
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enum {
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BIOS_LINKER_LOADER_COMMAND_ALLOCATE = 0x1,
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BIOS_LINKER_LOADER_COMMAND_ADD_POINTER = 0x2,
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BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM = 0x3,
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};
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enum {
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BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH = 0x1,
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BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2,
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};
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#define FW_CFG_FILE_SLOTS 0x10
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#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST + FW_CFG_FILE_SLOTS)
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#define FW_CFG_ENTRY_MASK ~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)
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#define FW_CFG_MAX_FILE_PATH 56
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#define BIOS_LINKER_LOADER_FILESZ FW_CFG_MAX_FILE_PATH
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#define QEMU_FW_CFG_SIGNATURE (('Q' << 24) | ('E' << 16) | ('M' << 8) | 'U')
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#define FW_CFG_DMA_ERROR (1 << 0)
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#define FW_CFG_DMA_READ (1 << 1)
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#define FW_CFG_DMA_SKIP (1 << 2)
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#define FW_CFG_DMA_SELECT (1 << 3)
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#define FW_CFG_DMA_ENABLED (1 << 1)
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struct fw_cfg_file {
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__be32 size;
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__be16 select;
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__be16 reserved;
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char name[FW_CFG_MAX_FILE_PATH];
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};
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struct fw_file {
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struct fw_cfg_file cfg; /* firmware file information */
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unsigned long addr; /* firmware file in-memory address */
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struct list_head list; /* list node to link to fw_list */
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};
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struct fw_cfg_file_iter {
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struct list_head *entry; /* structure to iterate file list */
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};
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struct fw_cfg_dma_access {
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__be32 control;
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__be32 length;
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__be64 address;
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};
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struct fw_cfg_arch_ops {
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void (*arch_read_pio)(uint16_t selector, uint32_t size,
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void *address);
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void (*arch_read_dma)(struct fw_cfg_dma_access *dma);
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};
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struct bios_linker_entry {
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__le32 command;
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union {
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/*
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* COMMAND_ALLOCATE - allocate a table from @alloc.file
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* subject to @alloc.align alignment (must be power of 2)
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* and @alloc.zone (can be HIGH or FSEG) requirements.
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*
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* Must appear exactly once for each file, and before
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* this file is referenced by any other command.
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*/
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struct {
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char file[BIOS_LINKER_LOADER_FILESZ];
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__le32 align;
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uint8_t zone;
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} alloc;
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/*
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* COMMAND_ADD_POINTER - patch the table (originating from
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* @dest_file) at @pointer.offset, by adding a pointer to the
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* table originating from @src_file. 1,2,4 or 8 byte unsigned
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* addition is used depending on @pointer.size.
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*/
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struct {
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char dest_file[BIOS_LINKER_LOADER_FILESZ];
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char src_file[BIOS_LINKER_LOADER_FILESZ];
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__le32 offset;
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uint8_t size;
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} pointer;
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/*
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* COMMAND_ADD_CHECKSUM - calculate checksum of the range
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* specified by @cksum_start and @cksum_length fields,
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* and then add the value at @cksum.offset.
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* Checksum simply sums -X for each byte X in the range
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* using 8-bit math.
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*/
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struct {
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char file[BIOS_LINKER_LOADER_FILESZ];
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__le32 offset;
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__le32 start;
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__le32 length;
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} cksum;
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/* padding */
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char pad[124];
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};
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} __packed;
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/**
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* Initialize QEMU fw_cfg interface
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*
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* @ops: arch specific read operations
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*/
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void qemu_fwcfg_init(struct fw_cfg_arch_ops *ops);
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void qemu_fwcfg_read_entry(uint16_t entry, uint32_t length, void *address);
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int qemu_fwcfg_read_firmware_list(void);
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struct fw_file *qemu_fwcfg_find_file(const char *name);
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/**
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* Get system cpu number
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*
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* @return: cpu number in system
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*/
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int qemu_fwcfg_online_cpus(void);
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/* helper functions to iterate firmware file list */
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struct fw_file *qemu_fwcfg_file_iter_init(struct fw_cfg_file_iter *iter);
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struct fw_file *qemu_fwcfg_file_iter_next(struct fw_cfg_file_iter *iter);
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bool qemu_fwcfg_file_iter_end(struct fw_cfg_file_iter *iter);
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bool qemu_fwcfg_present(void);
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bool qemu_fwcfg_dma_present(void);
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#endif
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