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MIPS: TXx9: Add prom_getenv

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Add prom_getenv() which can be used for YAMON.  This assumes other
firmware should pass NULL for fw_arg2.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2008-08-19 22:55:07 +09:00 committed by Ralf Baechle
parent e0dfb20c2b
commit 265b89db10
2 changed files with 16 additions and 0 deletions
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15
arch/mips/txx9/generic/setup.c
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@ -212,6 +212,21 @@ char * __init prom_getcmdline(void)
return &(arcs_cmdline[0]);
}
const char *__init prom_getenv(const char *name)
{
const s32 *str = (const s32 *)fw_arg2;
if (!str)
return NULL;
/* YAMON style ("name", "value" pairs) */
while (str[0] && str[1]) {
if (!strcmp((const char *)(unsigned long)str[0], name))
return (const char *)(unsigned long)str[1];
str += 2;
}
return NULL;
}
static void __noreturn txx9_machine_halt(void)
{
local_irq_disable();

1
include/asm-mips/txx9/generic.h
View file

@ -43,6 +43,7 @@ struct txx9_board_vec {
extern struct txx9_board_vec *txx9_board_vec;
extern int (*txx9_irq_dispatch)(int pending);
char *prom_getcmdline(void);
const char *prom_getenv(const char *name);
void txx9_wdt_init(unsigned long base);
void txx9_spi_init(int busid, unsigned long base, int irq);
void txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr);