kernel-ark/arch/powerpc/boot/prom.h
mostrows@watson.ibm.com 30d8caf7c6 [POWERPC] Editable kernel command-line in zImage binary.
zImage will set /chosen/bootargs (if it is otherwise empty) with the
contents of a buffer in the section "__builtin_cmdline".  This permits
tools to edit zImage binaries to set the command-line eventually
processed by vmlinux.

--
Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-06-15 19:31:25 +10:00

42 lines
990 B
C

#ifndef _PPC_BOOT_PROM_H_
#define _PPC_BOOT_PROM_H_
typedef void *phandle;
typedef void *ihandle;
extern int (*prom) (void *);
extern phandle chosen_handle;
extern ihandle stdout;
int call_prom(const char *service, int nargs, int nret, ...);
int call_prom_ret(const char *service, int nargs, int nret,
unsigned int *rets, ...);
extern int write(void *handle, void *ptr, int nb);
extern void *claim(unsigned long virt, unsigned long size, unsigned long aln);
static inline void exit(void)
{
call_prom("exit", 0, 0);
}
static inline phandle finddevice(const char *name)
{
return (phandle) call_prom("finddevice", 1, 1, name);
}
static inline int getprop(void *phandle, const char *name,
void *buf, int buflen)
{
return call_prom("getprop", 4, 1, phandle, name, buf, buflen);
}
static inline int setprop(void *phandle, const char *name,
void *buf, int buflen)
{
return call_prom("setprop", 4, 1, phandle, name, buf, buflen);
}
#endif /* _PPC_BOOT_PROM_H_ */