[mirror_ubuntu-focal-kernel.git] / arch / powerpc / platforms / powernv / copy-paste.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright 2016-17 IBM Corp.
 */
#include <asm/ppc-opcode.h>
#include <asm/reg.h>

/*
 * Copy/paste instructions:
 *
 *	copy RA,RB
 *		Copy contents of address (RA) + effective_address(RB)
 *		to internal copy-buffer.
 *
 *	paste RA,RB
 *		Paste contents of internal copy-buffer to the address
 *		(RA) + effective_address(RB)
 */
static inline int vas_copy(void *crb, int offset)
{
	asm volatile(PPC_COPY(%0, %1)";"
		:
		: "b" (offset), "b" (crb)
		: "memory");

	return 0;
}

static inline int vas_paste(void *paste_address, int offset)
{
	u32 cr;

	cr = 0;
	asm volatile(PPC_PASTE(%1, %2)";"
		"mfocrf %0, 0x80;"
		: "=r" (cr)
		: "b" (offset), "b" (paste_address)
		: "memory", "cr0");

	/* We mask with 0xE to ignore SO */
	return (cr >> CR0_SHIFT) & 0xE;
}
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
2392c8c8 SB	2	/*
2392c8c8 SB	3	* Copyright 2016-17 IBM Corp.
2392c8c8 SB	4	*/
2392c8c8 SB	5	#include <asm/ppc-opcode.h>
ab3759b5	6	#include <asm/reg.h>
2392c8c8	7
2392c8c8 SB	8	/*
	9	* Copy/paste instructions:
	10	*
	11	* copy RA,RB
	12	* Copy contents of address (RA) + effective_address(RB)
	13	* to internal copy-buffer.
	14	*
	15	* paste RA,RB
	16	* Paste contents of internal copy-buffer to the address
	17	* (RA) + effective_address(RB)
	18	*/
	19	static inline int vas_copy(void *crb, int offset)
	20	{
	21	asm volatile(PPC_COPY(%0, %1)";"
	22	:
	23	: "b" (offset), "b" (crb)
	24	: "memory");
	25
	26	return 0;
	27	}
	28
	29	static inline int vas_paste(void *paste_address, int offset)
	30	{
	31	u32 cr;
	32
	33	cr = 0;
	34	asm volatile(PPC_PASTE(%1, %2)";"
	35	"mfocrf %0, 0x80;"
	36	: "=r" (cr)
	37	: "b" (offset), "b" (paste_address)
	38	: "memory", "cr0");
	39
75743649 HM	40	/* We mask with 0xE to ignore SO */
75743649 HM	41	return (cr >> CR0_SHIFT) & 0xE;
2392c8c8	42	}