1 /* $OpenBSD: cmd_luna88k.c,v 1.1 2023/03/13 11:59:39 aoyama Exp $ */
2 /*
3 * Copyright (c) 2023 Kenji Aoyama
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <machine/board.h>
20
21 #include <luna88k/stand/boot/samachdep.h>
22 #include <stand/boot/cmd.h>
23
24 static int Xpoweroff(void);
25
26 const struct cmd_table cmd_machine[] = {
27 { "poweroff", CMDT_CMD, Xpoweroff },
28 { NULL, 0 }
29 };
30
31 struct pio {
32 volatile u_int8_t portA;
33 volatile unsigned : 24;
34 volatile u_int8_t portB;
35 volatile unsigned : 24;
36 volatile u_int8_t portC;
37 volatile unsigned : 24;
38 volatile u_int8_t cntrl;
39 volatile unsigned : 24;
40 };
41
42 #define PIO1_POWER 0x04
43 #define PIO1_DISABLE 0x00
44
45 static int
Xpoweroff(void)46 Xpoweroff(void)
47 {
48 struct pio *p1 = (struct pio *)OBIO_PIO1_BASE;
49
50 printf("attempting to power down...\n");
51
52 p1->cntrl = (PIO1_POWER << 1) | PIO1_DISABLE;
53 *(volatile u_int8_t *)&p1->portC;
54
55 DELAY(1000000); /* wait for a while */
56
57 return 0;
58 }
59