1#ifndef _ASM_X86_OLPC_OFW_H 2#define _ASM_X86_OLPC_OFW_H 3 4/* index into the page table containing the entry OFW occupies */ 5#define OLPC_OFW_PDE_NR 1022 6 7#define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */ 8 9#ifdef CONFIG_OLPC 10 11extern bool olpc_ofw_is_installed(void); 12 13/* run an OFW command by calling into the firmware */ 14#define olpc_ofw(name, args, res) \ 15 __olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res) 16 17extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res, 18 void **res); 19 20/* determine whether OFW is available and lives in the proper memory */ 21extern void olpc_ofw_detect(void); 22 23/* install OFW's pde permanently into the kernel's pgtable */ 24extern void setup_olpc_ofw_pgd(void); 25 26/* check if OFW was detected during boot */ 27extern bool olpc_ofw_present(void); 28 29extern void olpc_dt_build_devicetree(void); 30 31#else /* !CONFIG_OLPC */ 32static inline void olpc_ofw_detect(void) { } 33static inline void setup_olpc_ofw_pgd(void) { } 34static inline void olpc_dt_build_devicetree(void) { } 35#endif /* !CONFIG_OLPC */ 36 37#endif /* _ASM_X86_OLPC_OFW_H */ 38