[new uImage] Provide ability to restrict region used for boot images
Allow the user to set 'bootm_low' and 'bootm_size' env vars as a way
to restrict what memory range is used for bootm.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Marian Balakowicz <m8@semihalf.com>
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index a32a5a2..8595ef6 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -124,6 +124,7 @@
ulong os_data, os_len;
ulong image_start, image_end;
ulong load_start, load_end;
+ ulong mem_start, mem_size;
struct lmb lmb;
@@ -134,11 +135,10 @@
lmb_init(&lmb);
-#ifdef CFG_SDRAM_BASE
- lmb_add(&lmb, CFG_SDRAM_BASE, gd->bd->bi_memsize);
-#else
- lmb_add(&lmb, 0, gd->bd->bi_memsize);
-#endif
+ mem_start = getenv_bootm_low();
+ mem_size = getenv_bootm_size();
+
+ lmb_add(&lmb, mem_start, mem_size);
board_lmb_reserve(&lmb);
diff --git a/common/image.c b/common/image.c
index 0b71811..9e446fa 100644
--- a/common/image.c
+++ b/common/image.c
@@ -132,6 +132,32 @@
return (s && (*s == 'n')) ? 0 : 1;
}
+ulong getenv_bootm_low(void)
+{
+ char *s = getenv ("bootm_low");
+ if (s) {
+ ulong tmp = simple_strtoul (s, NULL, 16);
+ return tmp;
+ }
+
+#ifdef CFG_SDRAM_BASE
+ return CFG_SDRAM_BASE;
+#else
+ return 0;
+#endif
+}
+
+ulong getenv_bootm_size(void)
+{
+ char *s = getenv ("bootm_size");
+ if (s) {
+ ulong tmp = simple_strtoul (s, NULL, 16);
+ return tmp;
+ }
+
+ return gd->bd->bi_memsize;
+}
+
void memmove_wd (void *to, void *from, size_t len, ulong chunksz)
{
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)