Placeholder bzImage support

1 files changed, 73 insertions, 0 deletions

diff --git a/src/arch/i386/include/bzimage.h b/src/arch/i386/include/bzimage.h
new file mode 100644
index 00000000..4b6c1cf3
--- /dev/null
+++ b/src/arch/i386/include/bzimage.h
@@ -0,0 +1,73 @@
+#ifndef _BZIMAGE_H
+#define _BZIMAGE_H
+
+#include <stdint.h>
+
+/**
+ * A bzImage header
+ *
+ * As documented in Documentation/i386/boot.txt
+ */
+struct bzimage_header {
+	/** The size of the setup in sectors
+	 *
+	 * If this field contains 0, assume it contains 4.
+	 */
+	uint8_t setup_sects;
+	/** If set, the root is mounted readonly */
+	uint16_t root_flags;
+	/** DO NOT USE - for bootsect.S use only */
+	uint16_t syssize;
+	/** DO NOT USE - obsolete */
+	uint16_t swap_dev;
+	/** DO NOT USE - for bootsect.S use only */
+	uint16_t ram_size;
+	/** Video mode control */
+	uint16_t vid_mode;
+	/** Default root device number */
+	uint16_t root_dev;
+	/** 0xAA55 magic number */
+	uint16_t boot_flag;
+	/** Jump instruction */
+	uint16_t jump;
+	/** Magic signature "HdrS" */
+	uint32_t header;
+	/** Boot protocol version supported */
+	uint16_t version;
+	/** Boot loader hook (see below) */
+	uint32_t realmode_swtch;
+	/** The load-low segment (0x1000) (obsolete) */
+	uint16_t start_sys;
+	/** Pointer to kernel version string */
+	uint16_t kernel_version;
+	/** Boot loader identifier */
+	uint8_t type_of_loader;
+	/** Boot protocol option flags */
+	uint8_t loadflags;
+	/** Move to high memory size (used with hooks) */
+	uint16_t setup_move_size;
+	/** Boot loader hook (see below) */
+	uint32_t code32_start;
+	/** initrd load address (set by boot loader) */
+	uint32_t ramdisk_image;
+	/** initrd size (set by boot loader) */
+	uint32_t ramdisk_size;
+	/** DO NOT USE - for bootsect.S use only */
+	uint32_t bootsect_kludge;
+	/** Free memory after setup end */
+	uint16_t heap_end_ptr;
+	/** Unused */
+	uint16_t pad1;
+	/** 32-bit pointer to the kernel command line */
+	uint32_t cmd_line_ptr;
+	/** Highest legal initrd address */
+	uint32_t initrd_addr_max;
+} __attribute__ (( packed ));
+
+/** Offset of bzImage header within kernel image */
+#define BZHDR_OFFSET 0x1f1
+
+/** bzImage magic signature value */
+#define BZIMAGE_SIGNATURE 0x53726448
+
+#endif /* _BZIMAGE_H */