size_t memmap_pool_amount(char* mmap_addr, char* mmap_end) {
size_t size = 0;
while (mmap_addr < mmap_end) {
memmap_entry entry = parse_memmap_entry(mmap_addr);
if (entry.type == 1) {
auto length = entry.length;
while (length > 4096) {
size++;
length >>= 2;
}
}
mmap_addr += entry.size;
}
/* documentation: firmware_memmap.h */
int get_firmware_memmap_ranges(struct memory_range *range, size_t *ranges)
{
DIR *firmware_memmap_dir = NULL;
struct dirent *dirent;
int i = 0;
/* argument checking */
if (!range || !ranges) {
fprintf(stderr, "%s: Invalid arguments.\n", __FUNCTION__);
return -1;
}
/* open the directory */
firmware_memmap_dir = opendir(FIRMWARE_MEMMAP_DIR);
if (!firmware_memmap_dir) {
perror("Could not open \"" FIRMWARE_MEMMAP_DIR "\"");
goto error;
}
/* parse the entries */
while ((dirent = readdir(firmware_memmap_dir)) != NULL) {
int ret;
char full_path[PATH_MAX];
/* array overflow check */
if ((size_t)i >= *ranges) {
fprintf(stderr, "The firmware provides more entries "
"allowed (%zd). Please report that as bug.\n",
*ranges);
goto error;
}
/* exclude '.' and '..' */
if (dirent->d_name[0] && dirent->d_name[0] == '.') {
continue;
}
snprintf(full_path, PATH_MAX, "%s/%s", FIRMWARE_MEMMAP_DIR,
dirent->d_name);
full_path[PATH_MAX-1] = 0;
ret = parse_memmap_entry(full_path, &range[i]);
if (ret < 0) {
goto error;
}
i++;
}
/* close the dir as we don't need it any more */
closedir(firmware_memmap_dir);
/* update the number of ranges for the caller */
*ranges = i;
/* and finally sort the entries with qsort */
qsort(range, *ranges, sizeof(struct memory_range), compare_ranges);
return 0;
error:
if (firmware_memmap_dir) {
closedir(firmware_memmap_dir);
}
return -1;
}