[linux-2.6-block.git] / arch / powerpc / include / asm / jump_label.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_JUMP_LABEL_H
#define _ASM_POWERPC_JUMP_LABEL_H

/*
 * Copyright 2010 Michael Ellerman, IBM Corp.
 */

#ifndef __ASSEMBLY__
#include <linux/types.h>

#include <asm/feature-fixups.h>
#include <asm/asm-const.h>

#define JUMP_ENTRY_TYPE		stringify_in_c(FTR_ENTRY_LONG)
#define JUMP_LABEL_NOP_SIZE	4

static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
{
	asm_volatile_goto("1:\n\t"
		 "nop # arch_static_branch\n\t"
		 ".pushsection __jump_table,  \"aw\"\n\t"
		 ".long 1b - ., %l[l_yes] - .\n\t"
		 JUMP_ENTRY_TYPE "%c0 - .\n\t"
		 ".popsection \n\t"
		 : :  "i" (&((char *)key)[branch]) : : l_yes);

	return false;
l_yes:
	return true;
}

static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
{
	asm_volatile_goto("1:\n\t"
		 "b %l[l_yes] # arch_static_branch_jump\n\t"
		 ".pushsection __jump_table,  \"aw\"\n\t"
		 ".long 1b - ., %l[l_yes] - .\n\t"
		 JUMP_ENTRY_TYPE "%c0 - .\n\t"
		 ".popsection \n\t"
		 : :  "i" (&((char *)key)[branch]) : : l_yes);

	return false;
l_yes:
	return true;
}

#else
#define ARCH_STATIC_BRANCH(LABEL, KEY)		\
1098:	nop;					\
	.pushsection __jump_table, "aw";	\
	.long 1098b - ., LABEL - .;		\
	FTR_ENTRY_LONG KEY - .;			\
	.popsection
#endif

#endif /* _ASM_POWERPC_JUMP_LABEL_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
ac5f89c7 ME	2	#ifndef _ASM_POWERPC_JUMP_LABEL_H
	3	#define _ASM_POWERPC_JUMP_LABEL_H
	4
	5	/*
	6	* Copyright 2010 Michael Ellerman, IBM Corp.
ac5f89c7 ME	7	*/
ac5f89c7 ME	8
cc1adb5f	9	#ifndef __ASSEMBLY__
ac5f89c7 ME	10	#include <linux/types.h>
	11
	12	#include <asm/feature-fixups.h>
ec0c464c	13	#include <asm/asm-const.h>
ac5f89c7 ME	14
	15	#define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG)
	16	#define JUMP_LABEL_NOP_SIZE 4
	17
11276d53	18	static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
ac5f89c7	19	{
3f0116c3	20	asm_volatile_goto("1:\n\t"
e2985fd9	21	"nop # arch_static_branch\n\t"
ac5f89c7	22	".pushsection __jump_table, \"aw\"\n\t"
b0b3b2c7 CL	23	".long 1b - ., %l[l_yes] - .\n\t"
b0b3b2c7 CL	24	JUMP_ENTRY_TYPE "%c0 - .\n\t"
ac5f89c7	25	".popsection \n\t"
11276d53 PZ	26	: : "i" (&((char *)key)[branch]) : : l_yes);
	27
	28	return false;
	29	l_yes:
	30	return true;
	31	}
	32
	33	static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
	34	{
	35	asm_volatile_goto("1:\n\t"
e2985fd9	36	"b %l[l_yes] # arch_static_branch_jump\n\t"
11276d53	37	".pushsection __jump_table, \"aw\"\n\t"
b0b3b2c7 CL	38	".long 1b - ., %l[l_yes] - .\n\t"
b0b3b2c7 CL	39	JUMP_ENTRY_TYPE "%c0 - .\n\t"
11276d53 PZ	40	".popsection \n\t"
	41	: : "i" (&((char *)key)[branch]) : : l_yes);
	42
ac5f89c7 ME	43	return false;
	44	l_yes:
	45	return true;
	46	}
	47
cc1adb5f AB	48	#else
	49	#define ARCH_STATIC_BRANCH(LABEL, KEY) \
	50	1098: nop; \
	51	.pushsection __jump_table, "aw"; \
b0b3b2c7	52	.long 1098b - ., LABEL - .; \
478036c4	53	FTR_ENTRY_LONG KEY - .; \
cc1adb5f AB	54	.popsection
	55	#endif
	56
ac5f89c7	57	#endif /* _ASM_POWERPC_JUMP_LABEL_H */