--- /dev/null
+/*
+ * (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#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);
+
+#endif
projects / oweals / u-boot.git / blobdiff