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48 lines
963 B
48 lines
963 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/mips/sni/process.c |
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* |
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* Reset a SNI machine. |
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*/ |
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#include <linux/delay.h> |
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#include <asm/io.h> |
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#include <asm/reboot.h> |
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#include <asm/sni.h> |
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/* |
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* This routine reboots the machine by asking the keyboard |
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* controller to pulse the reset-line low. We try that for a while, |
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* and if it doesn't work, we do some other stupid things. |
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*/ |
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static inline void kb_wait(void) |
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{ |
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int i; |
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for (i = 0; i < 0x10000; i++) |
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if ((inb_p(0x64) & 0x02) == 0) |
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break; |
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} |
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/* XXX This ends up at the ARC firmware prompt ... */ |
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void sni_machine_restart(char *command) |
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{ |
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int i; |
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/* This does a normal via the keyboard controller like a PC. |
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We can do that easier ... */ |
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local_irq_disable(); |
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for (;;) { |
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for (i = 0; i < 100; i++) { |
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kb_wait(); |
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udelay(50); |
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outb_p(0xfe, 0x64); /* pulse reset low */ |
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udelay(50); |
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} |
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} |
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} |
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void sni_machine_power_off(void) |
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{ |
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*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; |
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}
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