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authorSimon Glass <sjg@chromium.org>2013-11-10 10:27:03 -0700
committerSimon Glass <sjg@chromium.org>2014-01-08 17:25:03 -0700
commit5c2859cdc30287b3593d9df88f48c31eecb0bbed (patch)
tree3d6552f961488657bf74869027e7ad4daf66dd73 /arch/sandbox/cpu/os.c
parentc5a62d4a7b4a971a1fb17d595f7c1e98a936a974 (diff)
downloadtalos-obmc-uboot-5c2859cdc30287b3593d9df88f48c31eecb0bbed.tar.gz
talos-obmc-uboot-5c2859cdc30287b3593d9df88f48c31eecb0bbed.zip
sandbox: Allow reading/writing of RAM buffer
It is useful to be able to save and restore the RAM contents of sandbox U-Boot either for setting up tests, for later analysys, or for chaining together multiple tests which need to keep the same memory contents. Add a function to provide a memory file for U-Boot. This is read on start-up and written when shutting down. If the file does not exist on start-up, it will be created when shutting down. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/sandbox/cpu/os.c')
-rw-r--r--arch/sandbox/cpu/os.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index ef6a651a60..725b505177 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -399,3 +399,42 @@ void os_puts(const char *str)
while (*str)
os_putc(*str++);
}
+
+int os_write_ram_buf(const char *fname)
+{
+ struct sandbox_state *state = state_get_current();
+ int fd, ret;
+
+ fd = open(fname, O_CREAT | O_WRONLY, 0777);
+ if (fd < 0)
+ return -ENOENT;
+ ret = write(fd, state->ram_buf, state->ram_size);
+ close(fd);
+ if (ret != state->ram_size)
+ return -EIO;
+
+ return 0;
+}
+
+int os_read_ram_buf(const char *fname)
+{
+ struct sandbox_state *state = state_get_current();
+ int fd, ret;
+ int size;
+
+ size = os_get_filesize(fname);
+ if (size < 0)
+ return -ENOENT;
+ if (size != state->ram_size)
+ return -ENOSPC;
+ fd = open(fname, O_RDONLY);
+ if (fd < 0)
+ return -ENOENT;
+
+ ret = read(fd, state->ram_buf, state->ram_size);
+ close(fd);
+ if (ret != state->ram_size)
+ return -EIO;
+
+ return 0;
+}
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