GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (c) Copyright 2011 by Tigris Elektronik GmbH
+ *
+ * Author:
+ *  Maximilian Schwerin <mvs@tigris.de>
+ */
+
+#include <common.h>
+
+#include <command.h>
+#include <env.h>
+#include <env_internal.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <search.h>
+#include <errno.h>
+#include <fat.h>
+#include <mmc.h>
+
+#ifdef CONFIG_SPL_BUILD
+/* TODO(sjg@chromium.org): Figure out why this is needed */
+# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
+#  define LOADENV
+# endif
+#else
+# define LOADENV
+# if defined(CONFIG_CMD_SAVEENV)
+#  define CMD_SAVEENV
+# endif
+#endif
+
+#ifdef CMD_SAVEENV
+static int env_fat_save(void)
+{
+	env_t __aligned(ARCH_DMA_MINALIGN) env_new;
+	struct blk_desc *dev_desc = NULL;
+	disk_partition_t info;
+	int dev, part;
+	int err;
+	loff_t size;
+
+	err = env_export(&env_new);
+	if (err)
+		return err;
+
+	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
+					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		return 1;
+
+	dev = dev_desc->devnum;
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
+		/*
+		 * This printf is embedded in the messages from env_save that
+		 * will calling it. The missing \n is intentional.
+		 */
+		printf("Unable to use %s %d:%d... ",
+		       CONFIG_ENV_FAT_INTERFACE, dev, part);
+		return 1;
+	}
+
+	err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
+			     &size);
+	if (err == -1) {
+		/*
+		 * This printf is embedded in the messages from env_save that
+		 * will calling it. The missing \n is intentional.
+		 */
+		printf("Unable to write \"%s\" from %s%d:%d... ",
+			CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
+		return 1;
+	}
+
+	return 0;
+}
+#endif /* CMD_SAVEENV */
+
+#ifdef LOADENV
+static int env_fat_load(void)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
+	struct blk_desc *dev_desc = NULL;
+	disk_partition_t info;
+	int dev, part;
+	int err;
+
+#ifdef CONFIG_MMC
+	if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
+		mmc_initialize(NULL);
+#endif
+
+	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
+					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		goto err_env_relocate;
+
+	dev = dev_desc->devnum;
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
+		/*
+		 * This printf is embedded in the messages from env_save that
+		 * will calling it. The missing \n is intentional.
+		 */
+		printf("Unable to use %s %d:%d... ",
+		       CONFIG_ENV_FAT_INTERFACE, dev, part);
+		goto err_env_relocate;
+	}
+
+	err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
+	if (err == -1) {
+		/*
+		 * This printf is embedded in the messages from env_save that
+		 * will calling it. The missing \n is intentional.
+		 */
+		printf("Unable to read \"%s\" from %s%d:%d... ",
+			CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
+		goto err_env_relocate;
+	}
+
+	return env_import(buf, 1);
+
+err_env_relocate:
+	env_set_default(NULL, 0);
+
+	return -EIO;
+}
+#endif /* LOADENV */
+
+U_BOOT_ENV_LOCATION(fat) = {
+	.location	= ENVL_FAT,
+	ENV_NAME("FAT")
+#ifdef LOADENV
+	.load		= env_fat_load,
+#endif
+#ifdef CMD_SAVEENV
+	.save		= env_save_ptr(env_fat_save),
+#endif
+};