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arm/raspberrypi: define bsp_reset to restart board by watchdog.

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Whether the board is restarted after application finish/exit
is controlled by BSP_RESET_BOARD_AT_EXIT configure option.
This commit is contained in:
Pavel Pisa
2016-09-08 23:40:21 +02:00
parent b20b736382
commit 5eb769ca8b
3 changed files with 82 additions and 1 deletions
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4
c/src/lib/libbsp/arm/raspberrypi/Makefile.am
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@@ -96,7 +96,6 @@ libbsp_a_SOURCES += ../shared/startup/bsp-start-in-hyp-support.S
endif
# Startup
libbsp_a_SOURCES += ../../shared/bspreset_loop.c
libbsp_a_SOURCES += startup/bspstart.c
libbsp_a_SOURCES += startup/cmdline.c
libbsp_a_SOURCES += startup/bspgetworkarea.c
@@ -105,6 +104,9 @@ libbsp_a_SOURCES += startup/bspsmp.c
libbsp_a_SOURCES += startup/bspsmp_init.c
endif
# Restart
libbsp_a_SOURCES += startup/bspreset.c
# IRQ
libbsp_a_SOURCES += ../shared/arm-cp15-set-exception-handler.c
libbsp_a_SOURCES += ../../shared/src/irq-generic.c

53
c/src/lib/libbsp/arm/raspberrypi/include/raspberrypi.h
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@@ -84,6 +84,59 @@
/** @} */
/**
* @name Power Management and Watchdog Registers
*
* @{
*/
#define BCM2835_PM_PASSWD_MAGIC 0x5a000000
#define BCM2835_PM_BASE (RPI_PERIPHERAL_BASE + 0x100000)
#define BCM2835_PM_GNRIC (BCM2835_PM_BASE + 0x00)
#define BCM2835_PM_GNRIC_POWUP 0x00000001
#define BCM2835_PM_GNRIC_POWOK 0x00000002
#define BCM2835_PM_GNRIC_ISPOW 0x00000004
#define BCM2835_PM_GNRIC_MEMREP 0x00000008
#define BCM2835_PM_GNRIC_MRDONE 0x00000010
#define BCM2835_PM_GNRIC_ISFUNC 0x00000020
#define BCM2835_PM_GNRIC_RSTN 0x00000fc0
#define BCM2835_PM_GNRIC_ENAB 0x00001000
#define BCM2835_PM_GNRIC_CFG 0x007f0000
#define BCM2835_PM_AUDIO (BCM2835_PM_BASE + 0x04)
#define BCM2835_PM_AUDIO_APSM 0x000fffff
#define BCM2835_PM_AUDIO_CTRLEN 0x00100000
#define BCM2835_PM_AUDIO_RSTN 0x00200000
#define BCM2835_PM_STATUS (BCM2835_PM_BASE + 0x18)
#define BCM2835_PM_RSTC (BCM2835_PM_BASE + 0x1c)
#define BCM2835_PM_RSTC_DRCFG 0x00000003
#define BCM2835_PM_RSTC_WRCFG 0x00000030
#define BCM2835_PM_RSTC_WRCFG_FULL 0x00000020
#define BCM2835_PM_RSTC_SRCFG 0x00000300
#define BCM2835_PM_RSTC_QRCFG 0x00003000
#define BCM2835_PM_RSTC_FRCFG 0x00030000
#define BCM2835_PM_RSTC_HRCFG 0x00300000
#define BCM2835_PM_RSTS (BCM2835_PM_BASE + 0x20)
#define BCM2835_PM_RSTS_HADDRQ 0x00000001
#define BCM2835_PM_RSTS_HADDRF 0x00000002
#define BCM2835_PM_RSTS_HADDRH 0x00000004
#define BCM2835_PM_RSTS_HADWRQ 0x00000010
#define BCM2835_PM_RSTS_HADWRF 0x00000020
#define BCM2835_PM_RSTS_HADWRH 0x00000040
#define BCM2835_PM_RSTS_HADSRQ 0x00000100
#define BCM2835_PM_RSTS_HADSRF 0x00000200
#define BCM2835_PM_RSTS_HADSRH 0x00000400
#define BCM2835_PM_RSTS_HADPOR 0x00001000
#define BCM2835_PM_WDOG (BCM2835_PM_BASE + 0x24)
/** @} */
/**
* @name GPIO Registers
*

26
c/src/lib/libbsp/arm/raspberrypi/startup/bspreset.c Normal file
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@@ -0,0 +1,26 @@
/**
* @file
*
* @ingroup raspberrypi
*
* @brief Raspberry pi restart chip function
*/
#include <bsp/bootcard.h>
#include <bsp/raspberrypi.h>
#include <bsp.h>
#include <rtems.h>
void bsp_reset(void)
{
uint32_t rstc;
BCM2835_REG(BCM2835_PM_WDOG) = BCM2835_PM_PASSWD_MAGIC | 20;
rstc = BCM2835_REG(BCM2835_PM_RSTC);
rstc &= ~BCM2835_PM_RSTC_WRCFG;
rstc |= BCM2835_PM_PASSWD_MAGIC | BCM2835_PM_RSTC_WRCFG_FULL;
BCM2835_REG(BCM2835_PM_RSTC) = rstc;
BCM2835_REG(BCM2835_PM_WDOG) = BCM2835_PM_PASSWD_MAGIC | 1;
while (1) ;
}