1 files changed, 138 insertions, 0 deletions
diff --git a/include/bootcount.h b/include/bootcount.h
new file mode 100644
index 0000000..8fa8cf8
--- /dev/null
+++ b/include/bootcount.h
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2012
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ */
+#ifndef _BOOTCOUNT_H__
+#define _BOOTCOUNT_H__
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <env.h>
+
+#ifdef CONFIG_DM_BOOTCOUNT
+
+struct bootcount_ops {
+	/**
+	 * get() - get the current bootcount value
+	 *
+	 * Returns the current counter value of the bootcount backing
+	 * store.
+	 *
+	 * @dev:	Device to read from
+	 * @bootcount:	Address to put the current bootcount value
+	 */
+	int (*get)(struct udevice *dev, u32 *bootcount);
+
+	/**
+	 * set() - set a bootcount value (e.g. to reset or increment)
+	 *
+	 * Sets the value in the bootcount backing store.
+	 *
+	 * @dev:	Device to read from
+	 * @bootcount:	New bootcount value to store
+	 */
+	int (*set)(struct udevice *dev, const u32 bootcount);
+};
+
+/* Access the operations for a bootcount device */
+#define bootcount_get_ops(dev)	((struct bootcount_ops *)(dev)->driver->ops)
+
+/**
+ * dm_bootcount_get() - Read the current value from a bootcount storage
+ *
+ * @dev:	Device to read from
+ * @bootcount:	Place to put the current bootcount
+ * @return 0 if OK, -ve on error
+ */
+int dm_bootcount_get(struct udevice *dev, u32 *bootcount);
+
+/**
+ * dm_bootcount_set() - Write a value to a bootcount storage
+ *
+ * @dev:	Device to read from
+ * @bootcount:  Value to be written to the backing storage
+ * @return 0 if OK, -ve on error
+ */
+int dm_bootcount_set(struct udevice *dev, u32 bootcount);
+
+#endif
+
+#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
+
+#if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE)
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define CONFIG_SYS_BOOTCOUNT_LE
+# else
+#  define CONFIG_SYS_BOOTCOUNT_BE
+# endif
+#endif
+
+#ifdef CONFIG_SYS_BOOTCOUNT_LE
+static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
+{
+	out_le32(addr, data);
+}
+
+static inline u32 raw_bootcount_load(volatile u32 *addr)
+{
+	return in_le32(addr);
+}
+#else
+static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
+{
+	out_be32(addr, data);
+}
+
+static inline u32 raw_bootcount_load(volatile u32 *addr)
+{
+	return in_be32(addr);
+}
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+static inline int bootcount_error(void)
+{
+	unsigned long bootcount = bootcount_load();
+	unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
+
+	if (bootlimit && bootcount > bootlimit) {
+		printf("Warning: Bootlimit (%lu) exceeded.", bootlimit);
+		if (!(gd->flags & GD_FLG_SPL_INIT))
+			printf(" Using altbootcmd.");
+		printf("\n");
+
+		return 1;
+	}
+
+	return 0;
+}
+
+static inline void bootcount_inc(void)
+{
+	unsigned long bootcount = bootcount_load();
+
+	if (gd->flags & GD_FLG_SPL_INIT) {
+		bootcount_store(++bootcount);
+		return;
+	}
+
+#ifndef CONFIG_SPL_BUILD
+	/* Only increment bootcount when no bootcount support in SPL */
+#ifndef CONFIG_SPL_BOOTCOUNT_LIMIT
+	bootcount_store(++bootcount);
+#endif
+	env_set_ulong("bootcount", bootcount);
+#endif /* !CONFIG_SPL_BUILD */
+}
+
+#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
+void bootcount_store(ulong a) {};
+ulong bootcount_load(void) { return 0; }
+#endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */
+#else
+static inline int bootcount_error(void) { return 0; }
+static inline void bootcount_inc(void) {}
+#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
+#endif /* _BOOTCOUNT_H__ */