[U-Boot-Users] [PATCH] Change env_get_char from a global function ptr to a function.
Joakim Tjernlund
joakim.tjernlund at transmode.se
Mon Mar 31 09:15:24 CEST 2008
On Mon, 2008-03-31 at 00:33 +0200, Wolfgang Denk wrote:
> In message <1206911129.7589.411.camel at gentoo-jocke.transmode.se> you wrote:
> >
> > Just one step closer to full relocation of u-boot. Global variables
> > before relocation to RAM is hard to deal with. Not sure if the code
> > got smaller or not.
>
> Hm...there are some such variables.
>
> Did you compare sizes?
I got the hint, thanks :)
size before:
text data bss dec hex filename
204117 13520 28716 246353 3c251 u-boot
size after:
text data bss dec hex filename
203893 13500 28716 246109 3c15d u-boot
So it also got smaller by 244 bytes.
Updated patch, with signoff and Jean-Christophe
comment addressed.
Jocke
>From 9e7cc775fa1fbf09b65f4a5edb5b16fe861c85dd Mon Sep 17 00:00:00 2001
From: Joakim Tjernlund <Joakim.Tjernlund at transmode.se>
Date: Thu, 7 Feb 2008 14:50:42 +0100
Subject: [PATCH] Change env_get_char from a global function ptr to
a function. This avoids an early global data reference.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund at transmode.se>
---
api/api.c | 1 -
common/cmd_bootm.c | 3 ---
common/cmd_nvedit.c | 3 ---
common/env_common.c | 19 +++++++++++++------
common/env_eeprom.c | 1 -
common/env_nvram.c | 1 -
common/fdt_support.c | 4 ----
common/ft_build.c | 3 ---
include/common.h | 1 +
9 files changed, 14 insertions(+), 22 deletions(-)
diff --git a/api/api.c b/api/api.c
index 0598d90..c1b2b60 100644
--- a/api/api.c
+++ b/api/api.c
@@ -40,7 +40,6 @@
/* 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);
/*****************************************************************************
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 9546729..5062817 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -1150,9 +1150,6 @@ do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)
-/* Function that returns a character from the environment */
-extern uchar (*env_get_char)(int);
-
static void
do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index dd263b6..15dca5b 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -68,9 +68,6 @@ 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);
diff --git a/common/env_common.c b/common/env_common.c
index a494812..f366fdb 100644
--- a/common/env_common.c
+++ b/common/env_common.c
@@ -50,7 +50,6 @@ 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
@@ -182,6 +181,19 @@ 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) {
@@ -215,11 +227,6 @@ 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");
diff --git a/common/env_eeprom.c b/common/env_eeprom.c
index 2adc129..fae87ca 100644
--- a/common/env_eeprom.c
+++ b/common/env_eeprom.c
@@ -38,7 +38,6 @@ env_t *env_ptr = NULL;
char * env_name_spec = "EEPROM";
-extern uchar (*env_get_char)(int);
extern uchar env_get_char_memory (int index);
diff --git a/common/env_nvram.c b/common/env_nvram.c
index 7c18896..bfc8d02 100644
--- a/common/env_nvram.c
+++ b/common/env_nvram.c
@@ -63,7 +63,6 @@ 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
diff --git a/common/fdt_support.c b/common/fdt_support.c
index a13c140..fc43b43 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -225,10 +225,6 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
#ifdef CONFIG_OF_HAS_UBOOT_ENV
-/* Function that returns a character from the environment */
-extern uchar(*env_get_char) (int);
-
-
int fdt_env(void *fdt)
{
int nodeoffset;
diff --git a/common/ft_build.c b/common/ft_build.c
index 5a0575e..bd0c915 100644
--- a/common/ft_build.c
+++ b/common/ft_build.c
@@ -396,9 +396,6 @@ 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);
-
#define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
#ifdef CONFIG_OF_HAS_BD_T
diff --git a/include/common.h b/include/common.h
index 54083f1..4fed250 100644
--- a/include/common.h
+++ b/include/common.h
@@ -229,6 +229,7 @@ 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);
--
1.5.4.3
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