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      1 /*	$NetBSD: hpcapm_machdep.c,v 1.6 2020/02/17 22:52:18 sevan Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 Takemura Shin
      5  * Copyright (c) 2000-2001 SATO Kazumi
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  *
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: hpcapm_machdep.c,v 1.6 2020/02/17 22:52:18 sevan Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/device.h>
     36 #include <sys/kernel.h>
     37 #include <sys/systm.h>
     38 
     39 #include <dev/hpc/apm/apmvar.h>
     40 
     41 #include <machine/bus.h>
     42 #include <machine/autoconf.h>
     43 #include <machine/config_hook.h>
     44 #include <machine/platid.h>
     45 #include <machine/platid_mask.h>
     46 
     47 #include "vrip_common.h"
     48 #if NVRIP_COMMON > 0
     49 #include <hpcmips/vr/vripvar.h>
     50 #include <hpcmips/vr/vr_asm.h>
     51 #endif
     52 
     53 #include "opt_tx39xx.h"
     54 #ifdef TX39XX
     55 #include <hpcmips/tx/tx39var.h>
     56 #endif
     57 
     58 void
     59 machine_standby(void)
     60 {
     61 #if NVRIP_COMMON > 0
     62 	if (platid_match(&platid, &platid_mask_CPU_MIPS_VR_41XX)) {
     63 		/*
     64 		 * disable all interrupts except PIU interrupt
     65 		 */
     66 		vrip_intr_suspend();
     67 		vrip_splpiu();
     68 
     69 		/*
     70 		 * STANDBY instruction puts the CPU into power saving
     71 		 * state until some interrupt occurs.
     72 		 * It sleeps until you push the power button.
     73 		 */
     74 		__asm(".set noreorder");
     75 		__asm(".word	" ___STRING(VR_OPCODE_STANDBY));
     76 		__asm("nop");
     77 		__asm("nop");
     78 		__asm("nop");
     79 		__asm("nop");
     80 		__asm("nop");
     81 		__asm(".set reorder");
     82 
     83 		splhigh();
     84 		vrip_intr_resume();
     85 		delay(1000); /* 1msec */
     86 	}
     87 #endif /* NVRIP_COMMON > 0 */
     88 }
     89 
     90 void
     91 machine_sleep(void)
     92 {
     93 #if NVRIP_COMMON > 0
     94 	if (platid_match(&platid, &platid_mask_CPU_MIPS_VR_41XX)) {
     95 		/*
     96 		 * disable all interrupts except PIU interrupt
     97 		 */
     98 		vrip_intr_suspend();
     99 		vrip_splpiu();
    100 
    101 		/*
    102 		 * SUSPEND instruction puts the CPU into power saving
    103 		 * state until some interrupt occurs.
    104 		 * It sleeps until you push the power button.
    105 		 */
    106 		__asm(".set noreorder");
    107 		__asm(".word	" ___STRING(VR_OPCODE_SUSPEND));
    108 		__asm("nop");
    109 		__asm("nop");
    110 		__asm("nop");
    111 		__asm("nop");
    112 		__asm("nop");
    113 		__asm(".set reorder");
    114 
    115 		splhigh();
    116 		vrip_intr_resume();
    117 		delay(1000); /* 1msec */
    118 	}
    119 #endif /* NVRIP_COMMON > 0 */
    120 #ifdef TX39XX
    121 	if (platid_match(&platid, &platid_mask_CPU_MIPS_TX)) {
    122 		tx39power_suspend_cpu();
    123 	}
    124 #endif
    125 }
    126