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Diffstat (limited to 'fs/fs.c')
-rw-r--r--fs/fs.c56
1 files changed, 53 insertions, 3 deletions
diff --git a/fs/fs.c b/fs/fs.c
index cb265174e2..7fd22101ef 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -429,13 +429,57 @@ int fs_size(const char *filename, loff_t *size)
return ret;
}
-int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
- loff_t *actread)
+#ifdef CONFIG_LMB
+/* Check if a file may be read to the given address */
+static int fs_read_lmb_check(const char *filename, ulong addr, loff_t offset,
+ loff_t len, struct fstype_info *info)
+{
+ struct lmb lmb;
+ int ret;
+ loff_t size;
+ loff_t read_len;
+
+ /* get the actual size of the file */
+ ret = info->size(filename, &size);
+ if (ret)
+ return ret;
+ if (offset >= size) {
+ /* offset >= EOF, no bytes will be written */
+ return 0;
+ }
+ read_len = size - offset;
+
+ /* limit to 'len' if it is smaller */
+ if (len && len < read_len)
+ read_len = len;
+
+ lmb_init_and_reserve(&lmb, gd->bd->bi_dram[0].start,
+ gd->bd->bi_dram[0].size, (void *)gd->fdt_blob);
+ lmb_dump_all(&lmb);
+
+ if (lmb_alloc_addr(&lmb, addr, read_len) == addr)
+ return 0;
+
+ printf("** Reading file would overwrite reserved memory **\n");
+ return -ENOSPC;
+}
+#endif
+
+static int _fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
+ int do_lmb_check, loff_t *actread)
{
struct fstype_info *info = fs_get_info(fs_type);
void *buf;
int ret;
+#ifdef CONFIG_LMB
+ if (do_lmb_check) {
+ ret = fs_read_lmb_check(filename, addr, offset, len, info);
+ if (ret)
+ return ret;
+ }
+#endif
+
/*
* We don't actually know how many bytes are being read, since len==0
* means read the whole file.
@@ -452,6 +496,12 @@ int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
return ret;
}
+int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
+ loff_t *actread)
+{
+ return _fs_read(filename, addr, offset, len, 0, actread);
+}
+
int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
loff_t *actwrite)
{
@@ -622,7 +672,7 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
pos = 0;
time = get_timer(0);
- ret = fs_read(filename, addr, pos, bytes, &len_read);
+ ret = _fs_read(filename, addr, pos, bytes, 1, &len_read);
time = get_timer(time);
if (ret < 0)
return 1;