From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/mips/sni/reset.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 arch/mips/sni/reset.c (limited to 'arch/mips/sni/reset.c') diff --git a/arch/mips/sni/reset.c b/arch/mips/sni/reset.c new file mode 100644 index 00000000..244f9427 --- /dev/null +++ b/arch/mips/sni/reset.c @@ -0,0 +1,45 @@ +/* + * linux/arch/mips/sni/process.c + * + * Reset a SNI machine. + */ +#include +#include +#include + +/* + * This routine reboots the machine by asking the keyboard + * controller to pulse the reset-line low. We try that for a while, + * and if it doesn't work, we do some other stupid things. + */ +static inline void kb_wait(void) +{ + int i; + + for (i = 0; i < 0x10000; i++) + if ((inb_p(0x64) & 0x02) == 0) + break; +} + +/* XXX This ends up at the ARC firmware prompt ... */ +void sni_machine_restart(char *command) +{ + int i, j; + + /* This does a normal via the keyboard controller like a PC. + We can do that easier ... */ + local_irq_disable(); + for (;;) { + for (i = 0; i < 100; i++) { + kb_wait(); + for (j = 0; j < 100000 ; j++) + /* nothing */; + outb_p(0xfe, 0x64); /* pulse reset low */ + } + } +} + +void sni_machine_power_off(void) +{ + *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; +} -- cgit v1.3.1