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/*-
* Copyright (c) 2017-2018 QCM Technologies.
* Copyright (c) 2017-2018 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "assym.inc"
#include <machine/asm.h>
.globl CNAME(power_save_sequence)
.p2align 3
ENTRY(enter_idle_powerx)
mfsprg0 %r3 /* Get the pcpu pointer */
ld %r3,PC_CURTHREAD(%r3) /* Get current thread */
ld %r3,TD_PCB(%r3) /* Get PCB of current thread */
std %r12,PCB_CONTEXT(%r3) /* Save the non-volatile GP regs. */
std %r13,PCB_CONTEXT+1*8(%r3)
std %r14,PCB_CONTEXT+2*8(%r3)
std %r15,PCB_CONTEXT+3*8(%r3)
std %r16,PCB_CONTEXT+4*8(%r3)
std %r17,PCB_CONTEXT+5*8(%r3)
std %r18,PCB_CONTEXT+6*8(%r3)
std %r19,PCB_CONTEXT+7*8(%r3)
std %r20,PCB_CONTEXT+8*8(%r3)
std %r21,PCB_CONTEXT+9*8(%r3)
std %r22,PCB_CONTEXT+10*8(%r3)
std %r23,PCB_CONTEXT+11*8(%r3)
std %r24,PCB_CONTEXT+12*8(%r3)
std %r25,PCB_CONTEXT+13*8(%r3)
std %r26,PCB_CONTEXT+14*8(%r3)
std %r27,PCB_CONTEXT+15*8(%r3)
std %r28,PCB_CONTEXT+16*8(%r3)
std %r29,PCB_CONTEXT+17*8(%r3)
std %r30,PCB_CONTEXT+18*8(%r3)
std %r31,PCB_CONTEXT+19*8(%r3)
mfcr %r16 /* Save the condition register */
std %r16,PCB_CR(%r3)
mflr %r16 /* Save the link register */
std %r16,PCB_LR(%r3)
std %r1,PCB_SP(%r3) /* Save the stack pointer */
std %r2,PCB_TOC(%r3) /* Save the TOC pointer */
/* Set where we want to jump */
bl 1f
.llong power_save_sequence /* Remember about 8 byte alignment */
1: mflr %r3
ld %r3,0(%r3)
mtsrr0 %r3
/* Set MSR */
li %r3,0
ori %r3,%r3,(PSL_ME | PSL_RI)
li %r8,0x9 /* PSL_SF and PSL_HV */
insrdi %r3,%r8,4,0
mtsrr1 %r3
rfid
.p2align 2
CNAME(power_save_sequence):
bl 1f
.llong 0x0 /* Playground for power-save sequence */
1: mflr %r3
/* Start power-save sequence */
std %r2,0(%r3)
ptesync
ld %r2,0(%r3)
2: cmpd %r2,%r2
bne 2b
nap
b .
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