bd6b2f9bef
so that code shared between imx5 and imx6 can work with OIDs under that node. Add last_reset_status (integer) and last_reset_reason (string) OIDs that provide info about the last chip reset (power-on, software reset, watchdog timeout).
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "opt_platform.h"
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#define _ARM32_BUS_DMA_PRIVATE
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/reboot.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
|
|
#include <machine/armreg.h>
|
|
#include <machine/bus.h>
|
|
#include <machine/devmap.h>
|
|
#include <machine/machdep.h>
|
|
|
|
#include <arm/freescale/imx/imx_machdep.h>
|
|
#include <arm/freescale/imx/imx_wdogreg.h>
|
|
|
|
SYSCTL_NODE(_hw, OID_AUTO, imx, CTLFLAG_RW, NULL, "i.MX container");
|
|
|
|
static int last_reset_status;
|
|
SYSCTL_UINT(_hw_imx, OID_AUTO, last_reset_status, CTLFLAG_RD,
|
|
&last_reset_status, 0, "Last reset status register");
|
|
|
|
SYSCTL_STRING(_hw_imx, OID_AUTO, last_reset_reason, CTLFLAG_RD,
|
|
"unknown", 0, "Last reset reason");
|
|
|
|
struct arm32_dma_range *
|
|
bus_dma_get_range(void)
|
|
{
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
bus_dma_get_range_nb(void)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This code which manipulates the watchdog hardware is here to implement
|
|
* cpu_reset() because the watchdog is the only way for software to reset the
|
|
* chip. Why here and not in imx_wdog.c? Because there's no requirement that
|
|
* the watchdog driver be compiled in, but it's nice to be able to reboot even
|
|
* if it's not.
|
|
*/
|
|
void
|
|
imx_wdog_cpu_reset(vm_offset_t wdcr_physaddr)
|
|
{
|
|
volatile uint16_t * pcr;
|
|
|
|
/*
|
|
* Trigger an immediate reset by clearing the SRS bit in the watchdog
|
|
* control register. The reset happens on the next cycle of the wdog
|
|
* 32KHz clock, so hang out in a spin loop until the reset takes effect.
|
|
*/
|
|
if ((pcr = arm_devmap_ptov(wdcr_physaddr, sizeof(*pcr))) == NULL) {
|
|
printf("cpu_reset() can't find its control register... locking up now.");
|
|
} else {
|
|
*pcr &= ~WDOG_CR_SRS;
|
|
}
|
|
for (;;)
|
|
continue;
|
|
}
|
|
|
|
void
|
|
imx_wdog_init_last_reset(vm_offset_t wdsr_phys)
|
|
{
|
|
volatile uint16_t * psr;
|
|
|
|
if ((psr = arm_devmap_ptov(wdsr_phys, sizeof(*psr))) == NULL)
|
|
return;
|
|
last_reset_status = *psr;
|
|
if (last_reset_status & WDOG_RSR_SFTW) {
|
|
sysctl___hw_imx_last_reset_reason.oid_arg1 = "SoftwareReset";
|
|
} else if (last_reset_status & WDOG_RSR_TOUT) {
|
|
sysctl___hw_imx_last_reset_reason.oid_arg1 = "WatchdogTimeout";
|
|
} else if (last_reset_status & WDOG_RSR_POR) {
|
|
sysctl___hw_imx_last_reset_reason.oid_arg1 = "PowerOnReset";
|
|
}
|
|
}
|
|
|
|
u_int
|
|
imx_soc_family(void)
|
|
{
|
|
return (imx_soc_type() >> IMXSOC_FAMSHIFT);
|
|
}
|
|
|
|
|