From: Cédric Le Goater Date: Thu, 24 Apr 2014 07:23:26 +0000 (+0200) Subject: powerpc/boot: Use a common prom_args struct in oflib X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fed23ed7ebf0fbea17ad8fed207ff35a747fecaf;p=openwrt%2Fstaging%2Fblogic.git powerpc/boot: Use a common prom_args struct in oflib This patch fixes warnings when the wrapper is compiled in 64bit and updates the boot wrapper code related to prom to converge with the kernel code in prom_init. This should make the review of changes easier. The kernel has a different number of possible arguments (10) when entering prom. There does not seem to be any good reason to have 12 in the wrapper, so the patch changes this value to args[10] in the prom_args struct. Signed-off-by: Cédric Le Goater Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/boot/of.h b/arch/powerpc/boot/of.h index e4c68f7391c5..5da03d9b9463 100644 --- a/arch/powerpc/boot/of.h +++ b/arch/powerpc/boot/of.h @@ -18,4 +18,6 @@ int of_setprop(const void *phandle, const char *name, const void *buf, /* Console functions */ void of_console_init(void); +typedef u32 __be32; + #endif /* _PPC_BOOT_OF_H_ */ diff --git a/arch/powerpc/boot/oflib.c b/arch/powerpc/boot/oflib.c index b0ec9cf3eaaf..c3288a3446b3 100644 --- a/arch/powerpc/boot/oflib.c +++ b/arch/powerpc/boot/oflib.c @@ -16,6 +16,15 @@ #include "of.h" +/* The following structure is used to communicate with open firmware. + * All arguments in and out are in big endian format. */ +struct prom_args { + __be32 service; /* Address of service name string. */ + __be32 nargs; /* Number of input arguments. */ + __be32 nret; /* Number of output arguments. */ + __be32 args[10]; /* Input/output arguments. */ +}; + static int (*prom) (void *); void of_init(void *promptr) @@ -23,18 +32,15 @@ void of_init(void *promptr) prom = (int (*)(void *))promptr; } +#define ADDR(x) (u32)(unsigned long)(x) + int of_call_prom(const char *service, int nargs, int nret, ...) { int i; - struct prom_args { - const char *service; - int nargs; - int nret; - unsigned int args[12]; - } args; + struct prom_args args; va_list list; - args.service = service; + args.service = ADDR(service); args.nargs = nargs; args.nret = nret; @@ -56,15 +62,10 @@ static int of_call_prom_ret(const char *service, int nargs, int nret, unsigned int *rets, ...) { int i; - struct prom_args { - const char *service; - int nargs; - int nret; - unsigned int args[12]; - } args; + struct prom_args args; va_list list; - args.service = service; + args.service = ADDR(service); args.nargs = nargs; args.nret = nret;