65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#include <assert.h>
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#include <sys/types.h>
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#include <machine/cpu.h>
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#include <minix/type.h>
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#include <minix/board.h>
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#include <io.h>
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#include "kernel/kernel.h"
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#include "kernel/proc.h"
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#include "kernel/vm.h"
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#include "kernel/proto.h"
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#include "arch_proto.h"
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#include "bsp_reset.h"
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#include "rpi_timer_registers.h"
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#include "rpi_rtc.h"
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void bsp_reset_init(void)
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{
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}
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void
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bsp_reset(void)
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{
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}
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void
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bsp_poweroff(void)
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{
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/*
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* The am335x can signal an external power management chip to cut the power
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* by toggling the PMIC_POWER_EN pin. It might fail if there isn't an
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* external PMIC or if the PMIC hasn't been configured to respond to toggles.
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* The only way to pull the pin low is via ALARM2 (see TRM 20.3.3.8).
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* At this point PM should have already signaled readclock to set the alarm.
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*/
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if (BOARD_IS_RPI(machine.board_id)) {
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/* rtc was frozen to prevent premature power-off, unfreeze it
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* now */
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rpi_rtc_run();
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/* wait for the alarm to go off and PMIC to disable power to
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* SoC */
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while (1);
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}
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}
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void bsp_disable_watchdog(void)
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{
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if(BOARD_IS_RPI(machine.board_id))
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{
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u32_t tmp, wdog, rstc;
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tmp = mmio_read(RPI_WDT_BASE+RPI_PM_RSTC);
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rstc = wdog = RPI_PM_PASSWORD;
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rstc |= tmp &~ RPI_PM_RSTC_CONFIGMASK;
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rstc |= RPI_PM_RSTC_FULL_RESET;
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wdog |= ( 10 & RPI_PM_WDOG_TIMEMASK );
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mmio_write( ( RPI_WDT_BASE + RPI_PM_WDOG ), wdog );
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mmio_write( ( RPI_WDT_BASE + RPI_PM_RSTC ), rstc );
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}
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}
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