sf3.patch

diff --git a/cmd/sf.c b/cmd/sf.c
index d18f6a888c..ed04f3f011 100644
--- a/cmd/sf.c
+++ b/cmd/sf.c
@@ -318,6 +318,35 @@ static int do_spi_flash_read_write(int argc, char *const argv[])
 	return ret == 0 ? 0 : 1;
 }
 
+static int do_spi_flash_dump(int argc, char *const argv[]) {
+	int ret = 1;
+	const loff_t len = 0x200;
+	unsigned long addr = 0x08000000;
+
+	char *buf = map_physmem(addr, len, MAP_WRBACK);
+	if (!buf && addr) {
+		puts("Failed to map physical memory\n");
+		return 1;
+	}
+
+	printf("Dumping %u bytes:", flash->size);
+
+	for(loff_t offset = 0; offset < flash->size; ) {
+		ret = spi_flash_read(flash, offset, len, buf);
+		if(ret) {
+			continue;
+		} 
+		for(int i = 0; i < len; i++) {
+			putc(buf[i]);
+		}
+		offset += len;
+	}
+	printf("End of dump\n");
+
+	unmap_physmem(buf, len);
+	return 1;
+}
+
 static int do_spi_flash_erase(int argc, char *const argv[])
 {
 	int ret;
@@ -571,6 +600,8 @@ static int do_spi_flash(struct cmd_tbl *cmdtp, int flag, int argc,
 	if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
 	    strcmp(cmd, "update") == 0)
 		ret = do_spi_flash_read_write(argc, argv);
+	else if (strcmp(cmd, "dump") == 0)
+		ret = do_spi_flash_dump(argc, argv);
 	else if (strcmp(cmd, "erase") == 0)
 		ret = do_spi_flash_erase(argc, argv);
 	else if (strcmp(cmd, "protect") == 0)