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allow ports to override bootelf behavior 

Change the bootelf setup function into a dedicated weak function called
do_bootelf_exec.  This way ports can control the behavior however they
like before/after calling the ELF entry point.
This commit is contained in:
Mike Frysinger 2008-04-13 19:42:18 -04:00 committed by Wolfgang Denk
parent a4b46ed6b3
commit 017e9b7925
1 changed files with 21 additions and 12 deletions
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33
common/cmd_elf.c
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@ -27,23 +27,34 @@ DECLARE_GLOBAL_DATA_PTR;
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
static inline void bootelf_setup(int argc, char *argv[])
int valid_elf_image (unsigned long addr);
unsigned long load_elf_image (unsigned long addr);
/* Allow ports to override the default behavior */
__attribute__((weak))
unsigned long do_bootelf_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
{
unsigned long ret;
/*
* QNX images require the data cache is disabled.
* Data cache is already flushed, so just turn it off.
*/
if (dcache_status ())
int dcache = dcache_status ();
if (dcache)
dcache_disable ();
#ifdef CONFIG_BLACKFIN
if (icache_status ())
icache_disable ();
#endif
}
/*
* pass address parameter as argv[0] (aka command name),
* and all remaining args
*/
ret = entry (argc, argv);
int valid_elf_image (unsigned long addr);
unsigned long load_elf_image (unsigned long addr);
if (dcache)
dcache_enable ();
return ret;
}
/* ======================================================================
* Interpreter command to boot an arbitrary ELF image from memory.
@ -68,13 +79,11 @@ int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
printf ("## Starting application at 0x%08lx ...\n", addr);
bootelf_setup(argc, argv);
/*
* pass address parameter as argv[0] (aka command name),
* and all remaining args
*/
rc = ((ulong (*)(int, char *[])) addr) (--argc, &argv[1]);
rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1);
if (rc != 0)
rcode = 1;