Add a (b)zImage parser to cbfstool

In the great tradition of LinuxBIOS this allows adding
a kernel as payload. add-payload is extended to also
allow adding an initial ramdisk (-I filename) and a
command line (-C console=ttyS0).

Change-Id: Iaca499a98b0adf0134e78d6bf020b6531a626aaa
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/3302
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 191 insertions, 0 deletions

diff --git a/util/cbfstool/linux.h b/util/cbfstool/linux.h
new file mode 100644
index 0000000000..20837e3707
--- /dev/null
+++ b/util/cbfstool/linux.h
@@ -0,0 +1,191 @@
+/*
+ * This file is part of coreboot..
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+/*
+ * Linux/i386 loader
+ * Supports bzImage, zImage and Image format.
+ *
+ * Based on work by Steve Gehlbach.
+ * Portions are taken from mkelfImage.
+ *
+ * 2003-09 by SONE Takeshi
+ */
+
+#include <stdint.h>
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+#define LINUX_PARAM_LOC 0x90000
+#define COMMAND_LINE_LOC 0x91000
+#define GDT_LOC 0x92000
+#define STACK_LOC 0x93000
+
+#define E820MAX	32		/* number of entries in E820MAP */
+struct e820entry {
+	unsigned long long addr;	/* start of memory segment */
+	unsigned long long size;	/* size of memory segment */
+	unsigned long type;	/* type of memory segment */
+#define E820_RAM	1
+#define E820_RESERVED	2
+#define E820_ACPI	3	/* usable as RAM once ACPI tables have been read */
+#define E820_NVS	4
+};
+
+/* The header of Linux/i386 kernel */
+struct linux_header {
+	u8 reserved1[0x1f1];	/* 0x000 */
+	u8 setup_sects;		/* 0x1f1 */
+	u16 root_flags;		/* 0x1f2 */
+	u32 syssize;		/* 0x1f4 (2.04+) */
+	u8 reserved2[2];	/* 0x1f8 */
+	u16 vid_mode;		/* 0x1fa */
+	u16 root_dev;		/* 0x1fc */
+	u16 boot_sector_magic;	/* 0x1fe */
+	/* 2.00+ */
+	u8 reserved3[2];	/* 0x200 */
+	u8 header_magic[4];	/* 0x202 */
+	u16 protocol_version;	/* 0x206 */
+	u32 realmode_swtch;	/* 0x208 */
+	u16 start_sys;		/* 0x20c */
+	u16 kver_addr;		/* 0x20e */
+	u8 type_of_loader;	/* 0x210 */
+	u8 loadflags;		/* 0x211 */
+	u16 setup_move_size;	/* 0x212 */
+	u32 code32_start;	/* 0x214 */
+	u32 ramdisk_image;	/* 0x218 */
+	u32 ramdisk_size;	/* 0x21c */
+	u8 reserved4[4];	/* 0x220 */
+	/* 2.01+ */
+	u16 heap_end_ptr;	/* 0x224 */
+	u8 reserved5[2];	/* 0x226 */
+	/* 2.02+ */
+	u32 cmd_line_ptr;	/* 0x228 */
+	/* 2.03+ */
+	u32 initrd_addr_max;	/* 0x22c */
+	/* 2.05+ */
+	u32 kernel_alignment;	/* 0x230 */
+	u8 relocatable_kernel;	/* 0x234 */
+	u8 min_alignment;	/* 0x235 (2.10+) */
+	u8 reserved6[2];	/* 0x236 */
+	/* 2.06+ */
+	u32 cmdline_size;	/* 0x238 */
+	/* 2.07+ */
+	u32 hardware_subarch;	/* 0x23c */
+	u64 hardware_subarch_data;/* 0x240 */
+	/* 2.08+ */
+	u32 payload_offset;	/* 0x248 */
+	u32 payload_length;	/* 0x24c */
+	/* 2.09+ */
+	u64 setup_data;		/* 0x250 */
+	/* 2.10+ */
+	u64 pref_address;	/* 0x258 */
+	u32 init_size;		/* 0x260 */
+} __attribute__ ((packed));
+
+/* Paramters passed to 32-bit part of Linux
+ * This is another view of the structure above.. */
+struct linux_params {
+	u8 orig_x;		/* 0x00 */
+	u8 orig_y;		/* 0x01 */
+	u16 ext_mem_k;		/* 0x02 -- EXT_MEM_K sits here */
+	u16 orig_video_page;	/* 0x04 */
+	u8 orig_video_mode;	/* 0x06 */
+	u8 orig_video_cols;	/* 0x07 */
+	u16 unused2;		/* 0x08 */
+	u16 orig_video_ega_bx;	/* 0x0a */
+	u16 unused3;		/* 0x0c */
+	u8 orig_video_lines;	/* 0x0e */
+	u8 orig_video_isVGA;	/* 0x0f */
+	u16 orig_video_points;	/* 0x10 */
+
+	/* VESA graphic mode -- linear frame buffer */
+	u16 lfb_width;		/* 0x12 */
+	u16 lfb_height;		/* 0x14 */
+	u16 lfb_depth;		/* 0x16 */
+	u32 lfb_base;		/* 0x18 */
+	u32 lfb_size;		/* 0x1c */
+	u16 cl_magic;		/* 0x20 */
+#define CL_MAGIC_VALUE 0xA33F
+	u16 cl_offset;		/* 0x22 */
+	u16 lfb_linelength;	/* 0x24 */
+	u8 red_size;		/* 0x26 */
+	u8 red_pos;		/* 0x27 */
+	u8 green_size;		/* 0x28 */
+	u8 green_pos;		/* 0x29 */
+	u8 blue_size;		/* 0x2a */
+	u8 blue_pos;		/* 0x2b */
+	u8 rsvd_size;		/* 0x2c */
+	u8 rsvd_pos;		/* 0x2d */
+	u16 vesapm_seg;		/* 0x2e */
+	u16 vesapm_off;		/* 0x30 */
+	u16 pages;		/* 0x32 */
+	u8 reserved4[12];	/* 0x34 -- 0x3f reserved for future expansion */
+
+	//struct apm_bios_info apm_bios_info;   /* 0x40 */
+	u8 apm_bios_info[0x40];
+	//struct drive_info_struct drive_info;  /* 0x80 */
+	u8 drive_info[0x20];
+	//struct sys_desc_table sys_desc_table; /* 0xa0 */
+	u8 sys_desc_table[0x140];
+	u32 alt_mem_k;		/* 0x1e0 */
+	u8 reserved5[4];	/* 0x1e4 */
+	u8 e820_map_nr;		/* 0x1e8 */
+	u8 reserved6[9];	/* 0x1e9 */
+	u16 mount_root_rdonly;	/* 0x1f2 */
+	u8 reserved7[4];	/* 0x1f4 */
+	u16 ramdisk_flags;	/* 0x1f8 */
+#define RAMDISK_IMAGE_START_MASK  	0x07FF
+#define RAMDISK_PROMPT_FLAG		0x8000
+#define RAMDISK_LOAD_FLAG		0x4000
+	u8 reserved8[2];	/* 0x1fa */
+	u16 orig_root_dev;	/* 0x1fc */
+	u8 reserved9[1];	/* 0x1fe */
+	u8 aux_device_info;	/* 0x1ff */
+	u8 reserved10[2];	/* 0x200 */
+	u8 param_block_signature[4];	/* 0x202 */
+	u16 param_block_version;	/* 0x206 */
+	u8 reserved11[8];	/* 0x208 */
+	u8 loader_type;		/* 0x210 */
+#define LOADER_TYPE_LOADLIN         1
+#define LOADER_TYPE_BOOTSECT_LOADER 2
+#define LOADER_TYPE_SYSLINUX        3
+#define LOADER_TYPE_ETHERBOOT       4
+#define LOADER_TYPE_KERNEL          5
+	u8 loader_flags;	/* 0x211 */
+	u8 reserved12[2];	/* 0x212 */
+	u32 kernel_start;	/* 0x214 */
+	u32 initrd_start;	/* 0x218 */
+	u32 initrd_size;	/* 0x21c */
+	u8 reserved12_5[8];	/* 0x220 */
+	u32 cmd_line_ptr;	/* 0x228 */
+	u32 initrd_addr_max;	/* 0x22c */
+	u32 kernel_alignment;	/* 0x230 */
+	u8 relocatable_kernel;	/* 0x234 */
+	u8 reserved13[155];		/* 0x22c */
+	struct e820entry e820_map[E820MAX];	/* 0x2d0 */
+	u8 reserved16[688];	/* 0x550 */
+#define COMMAND_LINE_SIZE 256
+	/* Command line is copied here by 32-bit i386/kernel/head.S.
+	 * So I will follow the boot protocol, rather than putting it
+	 * directly here. --ts1 */
+	u8 command_line[COMMAND_LINE_SIZE];	/* 0x800 */
+	u8 reserved17[1792];	/* 0x900 - 0x1000 */
+};
+