mirror of https://github.com/F-Stack/f-stack.git
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
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/*-
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* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opt_platform.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _ARM32_BUS_DMA_PRIVATE
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/devmap.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/armreg.h>
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#include <machine/bus.h>
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#include <machine/machdep.h>
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#include <arm/freescale/imx/imx_machdep.h>
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#include <arm/freescale/imx/imx_wdogreg.h>
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SYSCTL_NODE(_hw, OID_AUTO, imx, CTLFLAG_RW, NULL, "i.MX container");
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static int last_reset_status;
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SYSCTL_UINT(_hw_imx, OID_AUTO, last_reset_status, CTLFLAG_RD,
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&last_reset_status, 0, "Last reset status register");
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SYSCTL_STRING(_hw_imx, OID_AUTO, last_reset_reason, CTLFLAG_RD,
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"unknown", 0, "Last reset reason");
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struct arm32_dma_range *
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bus_dma_get_range(void)
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{
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return (NULL);
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}
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int
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bus_dma_get_range_nb(void)
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{
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return (0);
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}
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/*
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* This code which manipulates the watchdog hardware is here to implement
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* cpu_reset() because the watchdog is the only way for software to reset the
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* chip. Why here and not in imx_wdog.c? Because there's no requirement that
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* the watchdog driver be compiled in, but it's nice to be able to reboot even
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* if it's not.
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*/
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void
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imx_wdog_cpu_reset(vm_offset_t wdcr_physaddr)
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{
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volatile uint16_t * pcr;
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/*
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* Trigger an immediate reset by clearing the SRS bit in the watchdog
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* control register. The reset happens on the next cycle of the wdog
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* 32KHz clock, so hang out in a spin loop until the reset takes effect.
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*/
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if ((pcr = devmap_ptov(wdcr_physaddr, sizeof(*pcr))) == NULL) {
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printf("cpu_reset() can't find its control register... locking up now.");
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} else {
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*pcr &= ~WDOG_CR_SRS;
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}
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for (;;)
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continue;
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}
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void
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imx_wdog_init_last_reset(vm_offset_t wdsr_phys)
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{
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volatile uint16_t * psr;
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if ((psr = devmap_ptov(wdsr_phys, sizeof(*psr))) == NULL)
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return;
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last_reset_status = *psr;
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if (last_reset_status & WDOG_RSR_SFTW) {
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sysctl___hw_imx_last_reset_reason.oid_arg1 = "SoftwareReset";
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} else if (last_reset_status & WDOG_RSR_TOUT) {
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sysctl___hw_imx_last_reset_reason.oid_arg1 = "WatchdogTimeout";
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} else if (last_reset_status & WDOG_RSR_POR) {
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sysctl___hw_imx_last_reset_reason.oid_arg1 = "PowerOnReset";
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}
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}
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u_int
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imx_soc_family(void)
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{
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return (imx_soc_type() >> IMXSOC_FAMSHIFT);
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}
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