/*
 * arch/ppc64/kernel/pSeries_hvCall.S
 *
 *
 * This file contains the generic code to perform a call to the
 * pSeries LPAR hypervisor.
 * NOTE: this file will go away when we move to inline this work.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <linux/config.h>
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/errno.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/cache.h>
#include "ppc_asm.h"
	
/*
 * hcall interface to pSeries LPAR
 */
#define HSC .long 0x44000022

/* long plpar_hcall(unsigned long opcode,	 R3 
		 unsigned long arg1,		 R4 
		 unsigned long arg2,		 R5 
		 unsigned long arg3,		 R6 
		 unsigned long arg4,		 R7 
		 unsigned long *out1,		 R8 
		 unsigned long *out2,		 R9
		 unsigned long *out3);		 R10
 */

	.text
_GLOBAL(plpar_hcall)
	mfcr	r0
	std	r0,-8(r1)
	stdu	r1,-32(r1)

        std     r8,-8(r1)       /* Save out ptrs. */
        std     r9,-16(r1)
        std     r10,-24(r1)
	
	HSC                     /* invoke the hypervisor */

        ld      r10,-8(r1)      /* Fetch r4-r7 ret args. */
        std     r4,0(r10)
        ld      r10,-16(r1)
        std     r5,0(r10)
        ld      r10,-24(r1)
        std     r6,0(r10)

	ld	r1,0(r1)
	ld	r0,-8(r1)
	mtcrf	0xff,r0
	blr                     /* return r3 = status */


/* Simple interface with no output values (other than status) */
_GLOBAL(plpar_hcall_norets)
	mfcr	r0
	std	r0,-8(r1)
	HSC                     /* invoke the hypervisor */
	ld	r0,-8(r1)
	mtcrf	0xff,r0
	blr                     /* return r3 = status */