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Viewing File: /usr/src/kernels/5.14.0-503.33.1.el9_5.x86_64/arch/x86/include/asm/olpc_ofw.h

/* 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 */
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