[PATCH v5 24/29] image: Split up boot_get_ramdisk()

Simon Glass
2021-09-26T01:48:23Z

This function is far too long. Before trying to remove #ifdefs, split out
the code that deals with selecting the ramdisk into a separate function.

Leave the code indented as it was for easier review. The next patch cleans
this up along with checkpatch violations.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

Changes in v5:
- Drop rd_load since it is not used

Changes in v2:
- Drop unnecessary setting of rd_len, etc.

common/image-board.c | 149 +++++++++++++++++++++++++------------------
1 file changed, 86 insertions(+), 63 deletions(-)

diff --git a/common/image-board.c b/common/image-board.c
index 0c9500829a1..fecc4bf6365 100644
--- a/common/image-board.c
+++ b/common/image-board.c
@@ -313,57 +313,21 @@ int genimg_has_config(bootm_headers_t *images)
}

/**
- * boot_get_ramdisk - main ramdisk handling routine
- * @argc: command argument count
- * @argv: command argument list
+ * select_ramdisk() - Select and locate the ramdisk to use
+ *
* @images: pointer to the bootm images structure
+ * @select: name of ramdisk to select, or NULL for any
* @arch: expected ramdisk architecture
- * @rd_start: pointer to a ulong variable, will hold ramdisk start address
- * @rd_end: pointer to a ulong variable, will hold ramdisk end
- *
- * boot_get_ramdisk() is responsible for finding a valid ramdisk image.
- * Currently supported are the following ramdisk sources:
- * - multicomponent kernel/ramdisk image,
- * - commandline provided address of decicated ramdisk image.
- *
- * returns:
- * 0, if ramdisk image was found and valid, or skiped
- * rd_start and rd_end are set to ramdisk start/end addresses if
- * ramdisk image is found and valid
- *
- * 1, if ramdisk image is found but corrupted, or invalid
- * rd_start and rd_end are set to 0 if no ramdisk exists
+ * @rd_datap: pointer to a ulong variable, will hold ramdisk pointer
+ * @rd_lenp: pointer to a ulong variable, will hold ramdisk length
+ * @return 0 if OK, -ENOPKG if no ramdisk (but an error should not be reported),
+ * other -ve value on other error
*/
-int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
- u8 arch, ulong *rd_start, ulong *rd_end)
+static int select_ramdisk(bootm_headers_t *images, const char *select, u8 arch,
+ ulong *rd_datap, ulong *rd_lenp)
{
- ulong rd_data, rd_len;
- void *buf;
- const char *select = NULL;
-
- *rd_start = 0;
- *rd_end = 0;
-
- if (IS_ENABLED(CONFIG_ANDROID_BOOT_IMAGE)) {
- /* Look for an Android boot image */
- buf = map_sysmem(images->os.start, 0);
- if (buf && genimg_get_format(buf) == IMAGE_FORMAT_ANDROID)
- select = (argc == 0) ? env_get("loadaddr") : argv[0];
- }
-
- if (argc >= 2)
- select = argv[1];
-
- /*
- * Look for a '-' which indicates to ignore the
- * ramdisk argument
- */
- if (select && strcmp(select, "-") == 0) {
- debug("## Skipping init Ramdisk\n");
- rd_len = 0;
- rd_data = 0;
- } else if (select || genimg_has_config(images)) {
- ulong rd_addr, rd_load;
+ ulong rd_addr;
+ char *buf;

#if CONFIG_IS_ENABLED(FIT)
const char *fit_uname_config = images->fit_uname_cfg;
@@ -403,16 +367,16 @@ int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
} else {
/* use FIT configuration provided in first bootm
* command argument. If the property is not defined,
- * quit silently.
+ * quit silently (with -ENOPKG)
*/
rd_addr = map_to_sysmem(images->fit_hdr_os);
rd_noffset = fit_get_node_from_config(images,
FIT_RAMDISK_PROP,
rd_addr);
if (rd_noffset == -ENOENT)
- return 0;
+ return -ENOPKG;
else if (rd_noffset < 0)
- return 1;
+ return rd_noffset;
}
#endif

@@ -435,11 +399,10 @@ int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
images->verify);

if (!rd_hdr)
- return 1;
+ return -ENOENT;

- rd_data = image_get_data(rd_hdr);
- rd_len = image_get_data_size(rd_hdr);
- rd_load = image_get_load(rd_hdr);
+ *rd_datap = image_get_data(rd_hdr);
+ *rd_lenp = image_get_data_size(rd_hdr);
break;
}
#endif
@@ -451,9 +414,9 @@ int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
IH_TYPE_RAMDISK,
BOOTSTAGE_ID_FIT_RD_START,
FIT_LOAD_OPTIONAL_NON_ZERO,
- &rd_data, &rd_len);
+ rd_datap, rd_lenp);
if (rd_noffset < 0)
- return 1;
+ return rd_noffset;

images->fit_hdr_rd = map_sysmem(rd_addr, 0);
images->fit_uname_rd = fit_uname_ramdisk;
@@ -463,7 +426,7 @@ int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
#ifdef CONFIG_ANDROID_BOOT_IMAGE
case IMAGE_FORMAT_ANDROID:
android_image_get_ramdisk((void *)images->os.start,
- &rd_data, &rd_len);
+ rd_datap, rd_lenp);
break;
#endif
default:
@@ -473,17 +436,77 @@ int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
if (select)
end = strchr(select, ':');
if (end) {
- rd_len = hextoul(++end, NULL);
- rd_data = rd_addr;
+ *rd_lenp = hextoul(++end, NULL);
+ *rd_datap = rd_addr;
break;
}
}
puts("Wrong Ramdisk Image Format\n");
- rd_data = 0;
- rd_len = 0;
- rd_load = 0;
- return 1;
+ return -EINVAL;
}
+
+ return 0;
+}
+
+/**
+ * boot_get_ramdisk - main ramdisk handling routine
+ * @argc: command argument count
+ * @argv: command argument list
+ * @images: pointer to the bootm images structure
+ * @arch: expected ramdisk architecture
+ * @rd_start: pointer to a ulong variable, will hold ramdisk start address
+ * @rd_end: pointer to a ulong variable, will hold ramdisk end
+ *
+ * boot_get_ramdisk() is responsible for finding a valid ramdisk image.
+ * Currently supported are the following ramdisk sources:
+ * - multicomponent kernel/ramdisk image,
+ * - commandline provided address of decicated ramdisk image.
+ *
+ * returns:
+ * 0, if ramdisk image was found and valid, or skiped
+ * rd_start and rd_end are set to ramdisk start/end addresses if
+ * ramdisk image is found and valid
+ *
+ * 1, if ramdisk image is found but corrupted, or invalid
+ * rd_start and rd_end are set to 0 if no ramdisk exists
+ */
+int boot_get_ramdisk(int argc, char *const argv[], bootm_headers_t *images,
+ u8 arch, ulong *rd_start, ulong *rd_end)
+{
+ ulong rd_data, rd_len;
+ const char *select = NULL;
+
+ *rd_start = 0;
+ *rd_end = 0;
+
+ if (IS_ENABLED(CONFIG_ANDROID_BOOT_IMAGE)) {
+ char *buf;
+
+ /* Look for an Android boot image */
+ buf = map_sysmem(images->os.start, 0);
+ if (buf && genimg_get_format(buf) == IMAGE_FORMAT_ANDROID)
+ select = (argc == 0) ? env_get("loadaddr") : argv[0];
+ }
+
+ if (argc >= 2)
+ select = argv[1];
+
+ /*
+ * Look for a '-' which indicates to ignore the
+ * ramdisk argument
+ */
+ if (select && strcmp(select, "-") == 0) {
+ debug("## Skipping init Ramdisk\n");
+ rd_len = 0;
+ rd_data = 0;
+ } else if (select || genimg_has_config(images)) {
+ int ret;
+
+ ret = select_ramdisk(images, select, arch, &rd_data, &rd_len);
+ if (ret == -ENOPKG)
+ return 0;
+ else if (ret)
+ return ret;
} else if (images->legacy_hdr_valid &&
image_check_type(&images->legacy_hdr_os_copy,
IH_TYPE_MULTI)) {
--
2.33.0.685.g46640cef36-goog