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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_OLPC_OFW_H
#define _ASM_X86_OLPC_OFW_H
/* index into the page table containing the entry OFW occupies */
#define OLPC_OFW_PDE_NR 1022
#define OLPC_OFW_SIG 0x2057464F /* aka "OFW " */
#ifdef CONFIG_OLPC
extern bool olpc_ofw_is_installed(void);
/* run an OFW command by calling into the firmware */
#define olpc_ofw(name, args, res) \
__olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res)
extern int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
void **res);
/* determine whether OFW is available and lives in the proper memory */
extern void olpc_ofw_detect(void);
/* install OFW's pde permanently into the kernel's pgtable */
extern void setup_olpc_ofw_pgd(void);
/* check if OFW was detected during boot */
extern bool olpc_ofw_present(void);
extern void olpc_dt_build_devicetree(void);
#else /* !CONFIG_OLPC */
static inline void olpc_ofw_detect(void) { }
static inline void setup_olpc_ofw_pgd(void) { }
static inline void olpc_dt_build_devicetree(void) { }
#endif /* !CONFIG_OLPC */
#endif /* _ASM_X86_OLPC_OFW_H */