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