diff options
Diffstat (limited to 'arch/mips/include/asm/dec/prom.h')
| -rw-r--r-- | arch/mips/include/asm/dec/prom.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/mips/include/asm/dec/prom.h b/arch/mips/include/asm/dec/prom.h index 8fcad6984389..af068e634f1e 100644 --- a/arch/mips/include/asm/dec/prom.h +++ b/arch/mips/include/asm/dec/prom.h @@ -4,7 +4,7 @@ * * DECstation PROM interface. * - * Copyright (C) 2002 Maciej W. Rozycki + * Copyright (C) 2002, 2026 Maciej W. Rozycki * * Based on arch/mips/dec/prom/prom.h by the Anonymous. */ @@ -97,6 +97,17 @@ extern int (*__pmax_close)(int); #ifdef CONFIG_64BIT +#define O32_STK_SIZE 512 +extern unsigned long o32_stk[]; + +/* Switch the stack if outside the 32-bit address space. */ +static inline unsigned long *o32_get_stk(void) +{ + long fp = (long)__builtin_frame_address(0); + + return fp != (int)fp ? o32_stk + O32_STK_SIZE : NULL; +} + /* * On MIPS64 we have to call PROM functions via a helper * dispatcher to accommodate ABI incompatibilities. @@ -128,7 +139,7 @@ int __DEC_PROM_O32(_prom_printf, (int (*)(char *, ...), void *, char *, ...)); #define prom_getchar() _prom_getchar(__prom_getchar, NULL) #define prom_getenv(x) _prom_getenv(__prom_getenv, NULL, x) -#define prom_printf(x...) _prom_printf(__prom_printf, NULL, x) +#define prom_printf(x...) _prom_printf(__prom_printf, o32_get_stk(), x) #else /* !CONFIG_64BIT */ |