[MIPS] au1xxx: Support both YAMON and U-Boot

Signed-off-by: Domen Puncer <domen.puncer@ultra.si>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 14 insertions, 12 deletions

diff --git a/arch/mips/au1000/common/prom.c b/arch/mips/au1000/common/prom.c
index ae7d8c57bf3f..b4b010a2fe36 100644
--- a/arch/mips/au1000/common/prom.c
+++ b/arch/mips/au1000/common/prom.c
@@ -1,7 +1,7 @@
 /*
  *
  * BRIEF MODULE DESCRIPTION
- *    PROM library initialisation code, assuming YAMON is the boot loader.
+ *    PROM library initialisation code, supports YAMON and U-Boot.
  *
  * Copyright 2000, 2001, 2006 MontaVista Software Inc.
  * Author: MontaVista Software, Inc.
@@ -46,12 +46,6 @@
 extern int prom_argc;
 extern char **prom_argv, **prom_envp;
 
-typedef struct
-{
-        char *name;
-        char *val;
-} t_env_var;
-
 
 char * prom_getcmdline(void)
 {
@@ -84,13 +78,21 @@ char *prom_getenv(char *envname)
 {
         /*
          * Return a pointer to the given environment variable.
+         * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
          */
 
-        t_env_var *env = (t_env_var *)prom_envp;
-
-        while (env->name) {
-                if (strcmp(envname, env->name) == 0)
-                        return env->val;
+        char **env = prom_envp;
+        int i = strlen(envname);
+        int yamon = (*env && strchr(*env, '=') == NULL);
+
+        while (*env) {
+                if (yamon) {
+                        if (strcmp(envname, *env++) == 0)
+                                return *env;
+                } else {
+                        if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
+                                return *env + i + 1;
+                }
                 env++;
         }
         return NULL;