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-rw-r--r--common/env_common.c128
1 files changed, 63 insertions, 65 deletions
diff --git a/common/env_common.c b/common/env_common.c
index 460309b..a415ef8 100644
--- a/common/env_common.c
+++ b/common/env_common.c
@@ -1,10 +1,10 @@
/*
- * (C) Copyright 2000-2002
+ * (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
-
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -28,17 +28,12 @@
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
+#include <search.h>
+#include <errno.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
-#undef DEBUG_ENV
-#ifdef DEBUG_ENV
-#define DEBUGF(fmt,args...) printf(fmt ,##args)
-#else
-#define DEBUGF(fmt,args...)
-#endif
-
extern env_t *env_ptr;
extern void env_relocate_spec (void);
@@ -134,33 +129,22 @@ uchar default_environment[] = {
"\0"
};
-void env_crc_update (void)
-{
- env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
-}
-
static uchar env_get_char_init (int index)
{
uchar c;
/* if crc was bad, use the default environment */
if (gd->env_valid)
- {
c = env_get_char_spec(index);
- } else {
+ else
c = default_environment[index];
- }
return (c);
}
uchar env_get_char_memory (int index)
{
- if (gd->env_valid) {
- return ( *((uchar *)(gd->env_addr + index)) );
- } else {
- return ( default_environment[index] );
- }
+ return *env_get_addr(index);
}
uchar env_get_char (int index)
@@ -178,70 +162,84 @@ uchar env_get_char (int index)
uchar *env_get_addr (int index)
{
- if (gd->env_valid) {
- return ( ((uchar *)(gd->env_addr + index)) );
- } else {
- return (&default_environment[index]);
- }
+ if (gd->env_valid)
+ return (uchar *)(gd->env_addr + index);
+ else
+ return &default_environment[index];
}
-void set_default_env(void)
+void set_default_env(const char *s)
{
if (sizeof(default_environment) > ENV_SIZE) {
- puts ("*** Error - default environment is too large\n\n");
+ puts("*** Error - default environment is too large\n\n");
return;
}
- memset(env_ptr, 0, sizeof(env_t));
- memcpy(env_ptr->data, default_environment,
- sizeof(default_environment));
-#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
- env_ptr->flags = 0xFF;
-#endif
- env_crc_update ();
- gd->env_valid = 1;
+ if (s) {
+ if (*s == '!') {
+ printf("*** Warning - %s, "
+ "using default environment\n\n",
+ s+1);
+ } else {
+ puts(s);
+ }
+ } else {
+ puts("Using default environment\n\n");
+ }
+
+ if (himport((char *)default_environment,
+ sizeof(default_environment), '\0', 0) == 0) {
+ error("Environment import failed: errno = %d\n", errno);
+ }
+ gd->flags |= GD_FLG_ENV_READY;
}
-void env_relocate (void)
+/*
+ * Check if CRC is valid and (if yes) import the environment.
+ * Note that "buf" may or may not be aligned.
+ */
+int env_import(const char *buf, int check)
{
-#ifndef CONFIG_RELOC_FIXUP_WORKS
- DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
- gd->reloc_off);
-#endif
+ env_t *ep = (env_t *)buf;
-#ifdef ENV_IS_EMBEDDED
- /*
- * The environment buffer is embedded with the text segment,
- * just relocate the environment pointer
- */
-#ifndef CONFIG_RELOC_FIXUP_WORKS
- env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
-#endif
- DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
-#else
- /*
- * We must allocate a buffer for the environment
- */
- env_ptr = (env_t *)malloc (CONFIG_ENV_SIZE);
- DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
-#endif
+ if (check) {
+ uint32_t crc;
+
+ memcpy(&crc, &ep->crc, sizeof(crc));
+
+ if (crc32(0, ep->data, ENV_SIZE) != crc) {
+ set_default_env("!bad CRC");
+ return 0;
+ }
+ }
+
+ if (himport((char *)ep->data, ENV_SIZE, '\0', 0)) {
+ gd->flags |= GD_FLG_ENV_READY;
+ return 1;
+ }
+ error("Cannot import environment: errno = %d\n", errno);
+
+ set_default_env("!import failed");
+
+ return 0;
+}
+
+void env_relocate (void)
+{
if (gd->env_valid == 0) {
#if defined(CONFIG_ENV_IS_NOWHERE) /* Environment not changable */
- puts ("Using default environment\n\n");
+ set_default_env(NULL);
#else
- puts ("*** Warning - bad CRC, using default environment\n\n");
show_boot_progress (-60);
#endif
- set_default_env();
- }
- else {
+ set_default_env("!bad CRC");
+ } else {
env_relocate_spec ();
}
- gd->env_addr = (ulong)&(env_ptr->data);
}
-#ifdef CONFIG_AUTO_COMPLETE
+#if 0 /* need to reimplement - def CONFIG_AUTO_COMPLETE */
int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
{
int i, nxt, len, vallen, found;