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