mkbootimg: Add Loki support

* I want my target-files built images to be Loki'd if the device
  needs Loki.
* With this, devices that rely on Loki can ship Lineage Recovery
  officially.
* Import loki_tool from: https://github.com/Stricted/android_external_loki.

Change-Id: I45ef363e05566268c8f24f7e8939a2d785478fbe
diff --git a/loki_tool/loki.h b/loki_tool/loki.h
new file mode 100644
index 0000000..c1d6b3e
--- /dev/null
+++ b/loki_tool/loki.h
@@ -0,0 +1,88 @@
+#ifndef __LOKI_H_
+#define __LOKI_H_
+
+#define VERSION "2.1"
+
+#define BOOT_MAGIC_SIZE 8
+#define BOOT_NAME_SIZE 16
+#define BOOT_ARGS_SIZE 512
+
+#define BOOT_PARTITION      "/dev/block/platform/msm_sdcc.1/by-name/boot"
+#define RECOVERY_PARTITION  "/dev/block/platform/msm_sdcc.1/by-name/recovery"
+#define ABOOT_PARTITION     "/dev/block/platform/msm_sdcc.1/by-name/aboot"
+
+#define PATTERN1 "\xf0\xb5\x8f\xb0\x06\x46\xf0\xf7"
+#define PATTERN2 "\xf0\xb5\x8f\xb0\x07\x46\xf0\xf7"
+#define PATTERN3 "\x2d\xe9\xf0\x41\x86\xb0\xf1\xf7"
+#define PATTERN4 "\x2d\xe9\xf0\x4f\xad\xf5\xc6\x6d"
+#define PATTERN5 "\x2d\xe9\xf0\x4f\xad\xf5\x21\x7d"
+#define PATTERN6 "\x2d\xe9\xf0\x4f\xf3\xb0\x05\x46"
+
+#define ABOOT_BASE_SAMSUNG 0x88dfffd8
+#define ABOOT_BASE_LG 0x88efffd8
+#define ABOOT_BASE_G2 0xf7fffd8
+#define ABOOT_BASE_VIPER 0x40100000
+
+struct boot_img_hdr {
+    unsigned char magic[BOOT_MAGIC_SIZE];
+    unsigned kernel_size;   /* size in bytes */
+    unsigned kernel_addr;   /* physical load addr */
+    unsigned ramdisk_size;  /* size in bytes */
+    unsigned ramdisk_addr;  /* physical load addr */
+    unsigned second_size;   /* size in bytes */
+    unsigned second_addr;   /* physical load addr */
+    unsigned tags_addr;     /* physical addr for kernel tags */
+    unsigned page_size;     /* flash page size we assume */
+    unsigned dt_size;       /* device_tree in bytes */
+    unsigned unused;        /* future expansion: should be 0 */
+    unsigned char name[BOOT_NAME_SIZE];    /* asciiz product name */
+    unsigned char cmdline[BOOT_ARGS_SIZE];
+    unsigned id[8];         /* timestamp / checksum / sha1 / etc */
+};
+
+struct loki_hdr {
+    unsigned char magic[4];     /* 0x494b4f4c */
+    unsigned int recovery;      /* 0 = boot.img, 1 = recovery.img */
+    char build[128];   /* Build number */
+
+    unsigned int orig_kernel_size;
+    unsigned int orig_ramdisk_size;
+    unsigned int ramdisk_addr;
+};
+
+int loki_patch(const char* partition_label, const char* aboot_image, const char* in_image, const char* out_image);
+int loki_flash(const char* partition_label, const char* loki_image);
+int loki_find(const char* aboot_image);
+int loki_unlok(const char* in_image, const char* out_image);
+
+#define PATCH	"\xfe\xb5"			\
+				"\x0d\x4d"			\
+				"\xd5\xf8"			\
+				"\x88\x04"			\
+				"\xab\x68"			\
+				"\x98\x42"			\
+				"\x12\xd0"			\
+				"\xd5\xf8"			\
+				"\x90\x64"			\
+				"\x0a\x4c"			\
+				"\xd5\xf8"			\
+				"\x8c\x74"			\
+				"\x07\xf5\x80\x57"	\
+				"\x0f\xce"			\
+				"\x0f\xc4"			\
+				"\x10\x3f"			\
+				"\xfb\xdc"			\
+				"\xd5\xf8"			\
+				"\x88\x04"			\
+				"\x04\x49"			\
+				"\xd5\xf8"			\
+				"\x8c\x24"			\
+				"\xa8\x60"			\
+				"\x69\x61"			\
+				"\x2a\x61"			\
+				"\x00\x20"			\
+				"\xfe\xbd"			\
+				"\xff\xff\xff\xff"	\
+				"\xee\xee\xee\xee"
+
+#endif //__LOKI_H_