app_update.c

#include "main-header.h"
#include "app_update.h"
#include "partitions.h"
#include "baseinfo.h"
#include "flashapp.h"
 
 
#define META_MAGIC 0x53434656
/*
 * static uint32_t get_max_seq() {
 * int ct = loader_get_app_base_address_count();
 * int i;
 * uint32_t res = 0;
 * for (i=0;i<ct;i++) {
 *  void *base = loader_get_app_base_address(i);
 *  if  (base == NULL) {
 *    continue;
 *  }
 *  struct meta_header *mh = base - 1024;
 *  if (mh->magic != META_MAGIC) {
 *    continue;
 *  }
 *  printf("Sequence at @%p: %i\r\n",base,mh->meta_seq);
 *  if (mh->meta_seq > res) {
 *    res = mh->meta_seq;
 *  }
 * }
 * return res;
 * }
 */
 
/*
 * static int old_loader_set_latest_app(struct app_header *app) {
 * struct meta_header *meta;
 * struct meta_header newmeta;
 *
 * meta = ((void *)app) - 1024;
 * newmeta.magic = META_MAGIC;
 * uint32_t newseq = get_max_seq();
 * newseq++;
 * newmeta.meta_seq = newseq;
 * printf("New meta sequence: %i\r\n",newseq);
 * int r = 0;
 * r = flash_write((byte *) &newmeta, meta,1024);
 * return r;
 * }
 */
// set an app to be 'latest'. do the right thing for old (appinfo) and new loaders (partitions)
int set_latest_app(void *base) {
  // if we have no loaderapi, we do not need to bother, because then we have a new loader
  // which understands partitions
  if (loader_has_api()) {
    byte buf[1024]; // BUG in old loader: it reads 1k from stack onwards, so make sure stack has room on top
    buf[0] = 1;
    printf("Updating loader metadata of app @%p to become latest app\r\n", base);
    int x;
    if (buf[0] == 1) {
      x = loader_set_latest_app(base);
    }
    if (x) {
      printf("Failed to write metadata: %i\r\n", x);
    } else {
      printf("Metadata written\r\n");
    }
  }
  printf("Set app %p in partition\r\n", base);
  partition_set_latest_app(base);
  return 0;
}