X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fx86%2Finclude%2Fasm%2Ffw_cfg.h;h=e9450c619687f246fdb5f6d2d46305ab06751cb2;hb=2a605d4d8889ac5dd4c806b3a37ba75a80716e46;hp=2acf43eb8163645ec93e08b55ecc23b40f2efbd4;hpb=25757220d6c11645b32489e9c8318559815b0dee;p=u-boot

diff --git a/arch/x86/include/asm/fw_cfg.h b/arch/x86/include/asm/fw_cfg.h
index 2acf43eb81..e9450c6196 100644
--- a/arch/x86/include/asm/fw_cfg.h
+++ b/arch/x86/include/asm/fw_cfg.h
@@ -47,11 +47,23 @@ enum qemu_fwcfg_items {
 	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')
 
@@ -81,6 +93,55 @@ struct fw_cfg_dma_access {
 	__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
  */