1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Common PowerQUICC II code.
4 *
5 * Author: Scott Wood <scottwood@freescale.com>
6 * Copyright (c) 2007 Freescale Semiconductor
7 *
8 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
9 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
10 * Copyright (c) 2006 MontaVista Software, Inc.
11 */
12
13 #include <linux/kprobes.h>
14
15 #include <asm/cpm2.h>
16 #include <asm/io.h>
17 #include <asm/pci-bridge.h>
18
19 #include <platforms/82xx/pq2.h>
20
21 #define RMR_CSRE 0x00000001
22
23 void __noreturn pq2_restart(char *cmd)
24 {
25 local_irq_disable();
26 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
27
28 /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
29 mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
30 in_8(&cpm2_immr->im_clkrst.res[0]);
31
32 panic("Restart failed\n");
33 }
34 NOKPROBE_SYMBOL(pq2_restart)
35
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