diff options
| author | Wolfgang Denk <wd@denx.de> | 2010-07-24 20:22:02 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-09-19 19:29:48 +0200 |
| commit | 91a76751a090bf43c166fda0815c9b5b2bfccbe9 (patch) | |
| tree | 08a984591270e574bcda8c2cd28bd4c6351c7b46 /arch/sh/include/asm | |
| parent | 6d014adfa2ac4b1151d2b80a6943f59c3e254239 (diff) | |
Make getenv() work before relocation.
So far, getenv() would work before relocation is most cases, even
though it was not intended to be used that way. When switching to a
hash table based implementation, this would break a number of boards.
For convenience, we make getenv() check if it's running before
relocation and, if so, use getenv_f() internally.
Note that this is limited to simple cases, as we use a small static
buffer (32 bytes) in the global data for this purpose.
For this reason, it is also not a good idea to convert all current
uses of getenv_f() into getenv() - some of the existing use cases need
to be able to deal with longer variable values, so getenv_f() is still
needed and recommended for use before relocation.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'arch/sh/include/asm')
| -rw-r--r-- | arch/sh/include/asm/global_data.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/sh/include/asm/global_data.h b/arch/sh/include/asm/global_data.h index c12b8558ec..7fda1e1b62 100644 --- a/arch/sh/include/asm/global_data.h +++ b/arch/sh/include/asm/global_data.h @@ -1,5 +1,5 @@ /* - * (C) Copyright 2002 + * (C) Copyright 2002-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2007 @@ -38,7 +38,8 @@ typedef struct global_data unsigned long env_addr; /* Address of Environment struct */ unsigned long env_valid; /* Checksum of Environment valid */ void **jt; /* Standalone app jump table */ -}gd_t; + char env_buf[32]; /* buffer for getenv() before reloc. */ +} gd_t; #define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */ #define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */ @@ -46,7 +47,7 @@ typedef struct global_data #define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */ #define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */ #define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */ -#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */ +#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */ #define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("r13") |