Prepare v2023.10

[platform/kernel/u-boot.git] / include / bootcount.h

diff --git a/include/bootcount.h b/include/bootcount.h
index 671adcc..bfa5d46 100644 (file)
--- a/include/bootcount.h
+++ b/include/bootcount.h
@@ -7,19 +7,71 @@
 #define _BOOTCOUNT_H__
 
 #include <common.h>
+#include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/byteorder.h>
+#include <env.h>
 
-#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
+#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);
 
-#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
 
+/** bootcount_store() - store the current bootcount */
+void bootcount_store(ulong);
+
+/**
+ * bootcount_load() - load the current bootcount
+ *
+ * Return: bootcount, read from the appropriate location
+ */
+ulong bootcount_load(void);
+
+#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_TPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
+
 #ifdef CONFIG_SYS_BOOTCOUNT_LE
 static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
 {
@@ -71,19 +123,15 @@ static inline void bootcount_inc(void)
 
 #ifndef CONFIG_SPL_BUILD
        /* Only increment bootcount when no bootcount support in SPL */
-#ifndef CONFIG_SPL_BOOTCOUNT_LIMIT
+#if !defined(CONFIG_SPL_BOOTCOUNT_LIMIT) && !defined(CONFIG_TPL_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 /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_TPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
 #endif /* _BOOTCOUNT_H__ */