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authorNing Yang <yangn0@qq.com>2024-04-10 14:05:03 +0800
committerJoel Sherrill <joel@rtems.org>2024-04-11 10:24:00 -0500
commit4814f82ba48023308b64d20c759589fbf91fdb83 (patch)
tree2c5aa4228a3cf034bab458f0b6ec8d0fe2d939d9 /bsps/arm/raspberrypi
parentbsps/xil-ttc: Improve clock driver (diff)
downloadrtems-4814f82ba48023308b64d20c759589fbf91fdb83.tar.bz2
dev/clock: Move bcm2835-system-timer driver to shared space
This patch moves the bcm2835 system timer driver in the arm/raspberrypi directory to the shared directory and adjusts arm/raspberrypi BSP.
Diffstat (limited to 'bsps/arm/raspberrypi')
-rw-r--r--bsps/arm/raspberrypi/clock/clockdrv.c94
1 files changed, 0 insertions, 94 deletions
diff --git a/bsps/arm/raspberrypi/clock/clockdrv.c b/bsps/arm/raspberrypi/clock/clockdrv.c
deleted file mode 100644
index bb8490d03a..0000000000
--- a/bsps/arm/raspberrypi/clock/clockdrv.c
+++ /dev/null
@@ -1,94 +0,0 @@
-/**
- * @file
- *
- * @ingroup RTEMSDriverClockImpl
- *
- * @brief This source file contains the implementation of the BCM2835 Clock
- * Driver.
- */
-
-/*
- * Copyright (c) 2013 Alan Cudmore
- * Copyright (c) 2016 Pavel Pisa
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- *
- * http://www.rtems.org/license/LICENSE
- *
-*/
-
-#include <rtems.h>
-#include <bsp.h>
-#include <bsp/irq.h>
-#include <bsp/irq-generic.h>
-#include <bsp/raspberrypi.h>
-#include <rtems/timecounter.h>
-
-static struct timecounter raspberrypi_tc;
-
-static uint32_t raspberrypi_clock_get_timecount(struct timecounter *tc)
-{
- return BCM2835_REG(BCM2835_GPU_TIMER_CLO);
-}
-
-static void raspberrypi_clock_at_tick(void)
-{
- uint32_t act_val;
- uint32_t next_cmp = BCM2835_REG(BCM2835_GPU_TIMER_C3);
- next_cmp += rtems_configuration_get_microseconds_per_tick();
- BCM2835_REG(BCM2835_GPU_TIMER_C3) = next_cmp;
- act_val = BCM2835_REG(BCM2835_GPU_TIMER_CLO);
-
- /*
- * Clear interrupt only if there is time left to the next tick.
- * If time of the next tick has already passed then interrupt
- * request stays active and fires immediately after current tick
- * processing is finished.
- */
- if ((int32_t)(next_cmp - act_val) > 0)
- BCM2835_REG(BCM2835_GPU_TIMER_CS) = BCM2835_GPU_TIMER_CS_M3;
-}
-
-static void raspberrypi_clock_handler_install_isr(
- rtems_interrupt_handler clock_isr
-)
-{
- rtems_status_code sc = RTEMS_SUCCESSFUL;
-
- sc = rtems_interrupt_handler_install(
- BCM2835_IRQ_ID_GPU_TIMER_M3,
- "Clock",
- RTEMS_INTERRUPT_UNIQUE,
- clock_isr,
- NULL
- );
- if ( sc != RTEMS_SUCCESSFUL ) {
- rtems_fatal_error_occurred(0xdeadbeef);
- }
-}
-
-static void raspberrypi_clock_initialize_hardware(void)
-{
- uint32_t next_cmp = BCM2835_REG(BCM2835_GPU_TIMER_CLO);
- next_cmp += rtems_configuration_get_microseconds_per_tick();
- BCM2835_REG(BCM2835_GPU_TIMER_C3) = next_cmp;
- BCM2835_REG(BCM2835_GPU_TIMER_CS) = BCM2835_GPU_TIMER_CS_M3;
-
- raspberrypi_tc.tc_get_timecount = raspberrypi_clock_get_timecount;
- raspberrypi_tc.tc_counter_mask = 0xffffffff;
- raspberrypi_tc.tc_frequency = 1000000; /* 1 MHz */
- raspberrypi_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER;
- rtems_timecounter_install(&raspberrypi_tc);
-}
-
-#define Clock_driver_support_at_tick(arg) raspberrypi_clock_at_tick()
-
-#define Clock_driver_support_initialize_hardware() raspberrypi_clock_initialize_hardware()
-
-#define Clock_driver_support_install_isr(clock_isr) \
- raspberrypi_clock_handler_install_isr(clock_isr)
-
-#define CLOCK_DRIVER_USE_ONLY_BOOT_PROCESSOR 1
-
-#include "../../../shared/dev/clock/clockimpl.h"