[dartuino][bootloader] Add Filesystem Boot.

app/moot/fsboot.c

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016 Gurjant Kalsi <me@gurjantkalsi.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <app/moot/fsboot.h>
+#include <app/moot/stubs.h>
+#include <compiler.h>
+#include <err.h>
+#include <lib/bio.h>
+#include <lib/bootimage.h>
+#include <lib/fs.h>
+#include <stdio.h>
+
+#define MAX_FPATH_LEN 64
+
+// Attempt to boot from the filesystem.
+void attempt_fs_boot(void)
+{
+    char *mount_path, *device_name;
+    bootimage_t *bi;
+
+    status_t retcode = moot_mount_default_fs(&mount_path, &device_name);
+    if (retcode != NO_ERROR) {
+        return;
+    }
+
+    char fpath[MAX_FPATH_LEN];
+
+
+    filehandle *handle;
+    retcode = fs_open_file(fpath, &handle);
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    // Fill in the length of the bootimage
+    struct file_stat stat;
+    retcode = fs_stat_file(handle, &stat);
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    // Get the address of the Bootimage.
+    // TODO: At some point we might have a flash device/controller that doesn't
+    // support linear mode. In that case we'll have to come up with a mechanism
+    // that can verify a bootimg without memory mapping the file.
+    unsigned char *address = 0;
+    retcode = fs_file_ioctl(handle, FS_IOCTL_GET_FILE_ADDR, &address);
+    fs_close_file(handle);
+
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    bdev_t *secondary_flash = bio_open(device_name);
+    if (!secondary_flash) {
+        goto finish;
+    }
+
+    unsigned char *unused = 0;
+    retcode = bio_ioctl(secondary_flash, BIO_IOCTL_GET_MEM_MAP, &unused);
+    bio_close(secondary_flash);
+
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    retcode = bootimage_open(address, stat.size, &bi);
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    size_t imglen;
+    const void *imgptr;
+    retcode = bootimage_get_file_section(bi, TYPE_LK, &imgptr, &imglen);
+    if (retcode != NO_ERROR) {
+        goto finish;
+    }
+
+    // Flash the new image.
+    bdev_t *system_flash = bio_open(moot_system_info.system_flash_name);
+    if (!system_flash) {
+        goto finish;
+    }
+
+    ssize_t n_bytes_erased =
+        bio_erase(system_flash, moot_system_info.system_offset, imglen);
+    if (n_bytes_erased < (ssize_t)imglen) {
+        bio_close(system_flash);
+        goto finish;
+    }
+
+    ssize_t written =
+        bio_write(system_flash, imgptr, moot_system_info.system_offset, imglen);
+    bio_close(system_flash);
+
+    if (written < (ssize_t)imglen) {
+        goto finish;
+    }
+
+finish:
+    fs_unmount(mount_path);
+}
+
+

app/moot/include/app/moot/fsboot.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016 Gurjant Kalsi <me@gurjantkalsi.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+
+#ifndef APP_MOOT_FS_BOOT_H_
+#define APP_MOOT_FS_BOOT_H_
+
+// The platform/target should implement this routine by mouting the default
+// filesystem and returning a string that points to the mount point. If NULL is
+// returned it is assumed that either (1) the platform does not implement FS
+// boot or that (2) mounting the default filesystem failed in which case the
+// system proceeds to boot without FSBoot.
+void attempt_fs_boot(void);
+
+#endif  // APP_MOOT_FS_BOOT_H_