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 11 extern 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 17 extern 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 */ 21 extern void olpc_ofw_detect(void); 22 23 /* install OFW's pde permanently into the kernel's pgtable */ 24 extern void setup_olpc_ofw_pgd(void); 25 26 /* check if OFW was detected during boot */ 27 extern bool olpc_ofw_present(void); 28 29 extern void olpc_dt_build_devicetree(void); 30 31 #else /* !CONFIG_OLPC */ 32 static inline void olpc_ofw_detect(void) { } 33 static inline void setup_olpc_ofw_pgd(void) { } 34 static inline void olpc_dt_build_devicetree(void) { } 35 #endif /* !CONFIG_OLPC */ 36 37 #endif /* _ASM_X86_OLPC_OFW_H */ 38