[U-Boot] [PATCH v2 2/2] cramfs: make cramfs usable without a NOR flash

Heiko Schocher
2011-05-03T12:15:15Z

cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
---
changes for v2:
- added comments from Wolfgang Denk:
- introduce define OFFSET_ADJUSTMENT, so command can be used
without a NOR flash.

common/cmd_cramfs.c | 10 ++++++++--
fs/cramfs/cramfs.c | 4 ++++
2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/common/cmd_cramfs.c b/common/cmd_cramfs.c
index 9060ecc..e7f496e 100644
--- a/common/cmd_cramfs.c
+++ b/common/cmd_cramfs.c
@@ -45,6 +45,12 @@
#ifdef CONFIG_CRAMFS_CMDLINE
#include <flash.h>

+#ifdef CONFIG_SYS_NO_FLASH
+# define OFFSET_ADJUSTMENT 0
+#else
+# define OFFSET_ADJUSTMENT (flash_info[id.num].start[0])
+#endif
+
#ifndef CONFIG_CMD_JFFS2
#include <linux/stat.h>
char *mkmodestr(unsigned long mode, char *str)
@@ -119,7 +125,7 @@ int do_cramfs_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
dev.id = &id;
part.dev = &dev;
/* fake the address offset */
- part.offset = addr - flash_info[id.num].start[0];
+ part.offset = addr - OFFSET_ADJUSTMENT;

/* pre-set Boot file name */
if ((filename = getenv("bootfile")) == NULL) {
@@ -182,7 +188,7 @@ int do_cramfs_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
dev.id = &id;
part.dev = &dev;
/* fake the address offset */
- part.offset = addr - flash_info[id.num].start[0];
+ part.offset = addr - OFFSET_ADJUSTMENT;

if (argc == 2)
filename = argv[1];
diff --git a/fs/cramfs/cramfs.c b/fs/cramfs/cramfs.c
index 2956d39..910955d 100644
--- a/fs/cramfs/cramfs.c
+++ b/fs/cramfs/cramfs.c
@@ -41,8 +41,12 @@ struct cramfs_super super;

/* CPU address space offset calculation macro, struct part_info offset is
* device address space offset, so we need to shift it by a device start address. */
+#if !defined(CONFIG_SYS_NO_FLASH)
extern flash_info_t flash_info[];
#define PART_OFFSET(x) (x->offset + flash_info[x->dev->id->num].start[0])
+#else
+#define PART_OFFSET(x) (x->offset)
+#endif

static int cramfs_read_super (struct part_info *info)
{
--
1.7.4.4