Revert "Change env_get_char from a global function ptr to a function."

This reverts commit c0559be371b2a64b1a817088c3308688e2182f93
which is known to break booting from dataflash and NAND.

api/api.c

@@ -40,6 +40,7 @@
 
 /* U-Boot routines needed */
 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+extern uchar (*env_get_char)(int);
 extern uchar *env_get_addr(int);
 
 /*****************************************************************************

common/cmd_nvedit.c

@@ -68,6 +68,9 @@ DECLARE_GLOBAL_DATA_PTR;
 /************************************************************************
 ************************************************************************/
 
+/* Function that returns a character from the environment */
+extern uchar (*env_get_char)(int);
+
 /* Function that returns a pointer to a value from the environment */
 /* (Only memory version supported / needed). */
 extern uchar *env_get_addr(int);

common/env_common.c

@@ -50,6 +50,7 @@ extern void env_relocate_spec (void);
 extern uchar env_get_char_spec(int);
 
 static uchar env_get_char_init (int index);
+uchar (*env_get_char)(int) = env_get_char_init;
 
 /************************************************************************
  * Default settings to be used when no valid environment is found
@@ -181,19 +182,6 @@ uchar env_get_char_memory (int index)
 }
 #endif
 
-uchar env_get_char (int index)
-{
-	uchar c;
-
-	/* if relocated to RAM */
-	if (gd->flags & GD_FLG_RELOC)
-		c = env_get_char_memory(index);
-	else
-		c = env_get_char_init(index);
-
-	return (c);
-}
-
 uchar *env_get_addr (int index)
 {
 	if (gd->env_valid) {
@@ -227,6 +215,11 @@ void env_relocate (void)
 	DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 #endif
 
+	/*
+	 * After relocation to RAM, we can always use the "memory" functions
+	 */
+	env_get_char = env_get_char_memory;
+
 	if (gd->env_valid == 0) {
 #if defined(CONFIG_GTH)	|| defined(CFG_ENV_IS_NOWHERE)	/* Environment not changable */
 		puts ("Using default environment\n\n");

common/env_eeprom.c

@@ -38,6 +38,7 @@ env_t *env_ptr = NULL;
 
 char * env_name_spec = "EEPROM";
 
+extern uchar (*env_get_char)(int);
 extern uchar env_get_char_memory (int index);
 
 

common/env_nvram.c

@@ -63,6 +63,7 @@ char * env_name_spec = "NVRAM";
 extern uchar default_environment[];
 extern int default_environment_size;
 
+extern uchar (*env_get_char)(int);
 extern uchar env_get_char_memory (int index);
 
 #ifdef CONFIG_AMIGAONEG3SE

common/ft_build.c

@@ -396,6 +396,8 @@ void *ft_get_prop(void *bphp, const char *propname, int *szp)
 
 /********************************************************************/
 
+/* Function that returns a character from the environment */
+extern uchar(*env_get_char) (int);
 
 void ft_setup(void *blob, bd_t * bd, ulong initrd_start, ulong initrd_end)
 {

include/common.h

@@ -227,7 +227,6 @@ extern ulong load_addr;		/* Default Load Address */
 /* common/cmd_nvedit.c */
 int	env_init     (void);
 void	env_relocate (void);
-uchar	env_get_char (int);
 int	envmatch     (uchar *, int);
 char	*getenv	     (char *);
 int	getenv_r     (char *name, char *buf, unsigned len);