Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 16738f9e authored by David Ng's avatar David Ng Committed by Giulio Cervera
Browse files

mkbootimg: Add --dt parameter to specify DT image 

New optional --dt parameter to specify a kernel device
tree image.

Change-Id: I7e2c48c25c04165642eedadc3dc16a082dd99eb0
parent c9652740

mkbootimg/bootimg.h

+5 −2
Original line number Diff line number Diff line
@@ -40,8 +40,8 @@ struct boot_img_hdr 


    unsigned tags_addr;    /* physical addr for kernel tags */

    unsigned page_size;    /* flash page size we assume */

    unsigned unused[2];    /* future expansion: should be 0 */



    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];
@@ -59,10 +59,13 @@ struct boot_img_hdr 
** +-----------------+

** | second stage    | o pages

** +-----------------+

** | device tree     | p pages

** +-----------------+

**

** n = (kernel_size + page_size - 1) / page_size

** m = (ramdisk_size + page_size - 1) / page_size

** o = (second_size + page_size - 1) / page_size

** p = (dt_size + page_size - 1) / page_size

**

** 0. all entities are page_size aligned in flash

** 1. kernel and ramdisk are required (size != 0)

mkbootimg/mkbootimg.c

+21 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ int usage(void) 
            "       [ --base <address> ]\n"

            "       [ --pagesize <pagesize> ]\n"

            "       [ --ramdisk_offset <address> ]\n"

            "       [ --dt <filename> ]\n"

            "       -o|--output <filename>\n"

            );

    return 1;
@@ -106,6 +107,8 @@ int main(int argc, char **argv) 
    char *cmdline = "";

    char *bootimg = 0;

    char *board = "";

    char *dt_fn = 0;

    void *dt_data = 0;

    unsigned pagesize = 2048;

    int fd;

    SHA_CTX ctx;
@@ -157,6 +160,8 @@ int main(int argc, char **argv) 
                fprintf(stderr,"error: unsupported page size %d\n", pagesize);

                return -1;

            }

        } else if(!strcmp(arg, "--dt")) {

            dt_fn = val;

        } else {

            return usage();

        }
@@ -223,6 +228,14 @@ int main(int argc, char **argv) 
        }

    }



    if(dt_fn) {

        dt_data = load_file(dt_fn, &hdr.dt_size);

        if (dt_data == 0) {

            fprintf(stderr,"error: could not load device tree image '%s'\n", dt_fn);

            return 1;

        }

    }



    /* put a hash of the contents in the header so boot images can be

     * differentiated based on their first 2k.

     */
@@ -233,6 +246,10 @@ int main(int argc, char **argv) 
    SHA_update(&ctx, &hdr.ramdisk_size, sizeof(hdr.ramdisk_size));

    SHA_update(&ctx, second_data, hdr.second_size);

    SHA_update(&ctx, &hdr.second_size, sizeof(hdr.second_size));

    if(dt_data) {

        SHA_update(&ctx, dt_data, hdr.dt_size);

        SHA_update(&ctx, &hdr.dt_size, sizeof(hdr.dt_size));

    }

    sha = SHA_final(&ctx);

    memcpy(hdr.id, sha,

           SHA_DIGEST_SIZE > sizeof(hdr.id) ? sizeof(hdr.id) : SHA_DIGEST_SIZE);
@@ -257,6 +274,10 @@ int main(int argc, char **argv) 
        if(write_padding(fd, pagesize, hdr.ramdisk_size)) goto fail;

    }



    if(dt_data) {

        if(write(fd, dt_data, hdr.dt_size) != hdr.dt_size) goto fail;

        if(write_padding(fd, pagesize, hdr.dt_size)) goto fail;

    }

    return 0;



fail: