diff options
author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-19 06:35:52 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-20 09:57:01 +0200 |
commit | 7632906fc290b652416ab59eb5fb49356c064ed6 (patch) | |
tree | ac036b1f95637e044e10138ceea8d2b56d80ec97 /c/src/lib/libbsp/sh/gensh4 | |
parent | bsps: Move bspsmpgetcurrentprocessor.c to bsps (diff) | |
download | rtems-7632906fc290b652416ab59eb5fb49356c064ed6.tar.bz2 |
bsps: Move clock drivers to bsps
This patch is a part of the BSP source reorganization.
Update #3285.
Diffstat (limited to 'c/src/lib/libbsp/sh/gensh4')
-rw-r--r-- | c/src/lib/libbsp/sh/gensh4/Makefile.am | 2 | ||||
-rw-r--r-- | c/src/lib/libbsp/sh/gensh4/clock/ckinit.c | 244 |
2 files changed, 1 insertions, 245 deletions
diff --git a/c/src/lib/libbsp/sh/gensh4/Makefile.am b/c/src/lib/libbsp/sh/gensh4/Makefile.am index 7bbe0daaea..94c0601cc8 100644 --- a/c/src/lib/libbsp/sh/gensh4/Makefile.am +++ b/c/src/lib/libbsp/sh/gensh4/Makefile.am @@ -27,7 +27,7 @@ librtemsbsp_a_SOURCES += ../shared/bsphwinit.c librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspreset-empty.c librtemsbsp_a_SOURCES += startup/cpu_asm.c librtemsbsp_a_SOURCES += startup/ispsh7750.c -librtemsbsp_a_SOURCES += clock/ckinit.c +librtemsbsp_a_SOURCES +=../../../../../../bsps/sh/gensh4/clock/ckinit.c librtemsbsp_a_SOURCES += timer/timer.c # console librtemsbsp_a_SOURCES += console/console.c diff --git a/c/src/lib/libbsp/sh/gensh4/clock/ckinit.c b/c/src/lib/libbsp/sh/gensh4/clock/ckinit.c deleted file mode 100644 index 795203d2d9..0000000000 --- a/c/src/lib/libbsp/sh/gensh4/clock/ckinit.c +++ /dev/null @@ -1,244 +0,0 @@ -/* - * This file contains the generic RTEMS clock driver the Hitachi SH 7750 - */ - -/* - * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov <vvv@oktet.ru> - * - * COPYRIGHT (c) 2001 - * On-Line Applications Research Corporation (OAR). - * - * 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 <stdlib.h> - -#include <rtems/clockdrv.h> -#include <rtems/score/sh_io.h> -#include <rtems/score/sh.h> -#include <rtems/score/ispsh7750.h> -#include <rtems/score/iosh7750.h> - -extern uint32_t bsp_clicks_per_second; - -#ifndef CLOCKPRIO -#define CLOCKPRIO 10 -#endif - -/* Clock timer prescaler division ratio */ -#define CLOCK_PRESCALER 4 -#define TCR0_TPSC SH7750_TCR_TPSC_DIV4 - -/* - * The interrupt vector number associated with the clock tick device - * driver. - */ -#define CLOCK_VECTOR SH7750_EVT_TO_NUM(SH7750_EVT_TUNI0) - -/* - * Clock_driver_ticks is a monotonically increasing counter of the - * number of clock ticks since the driver was initialized. - */ -volatile uint32_t Clock_driver_ticks; - -static rtems_isr Clock_isr( rtems_vector_number vector ); - -/* - * The previous ISR on this clock tick interrupt vector. - */ -rtems_isr_entry Old_ticker; - -/* - * Isr Handler - */ - -/* - * Clock_isr - * - * Clock interrupt handling routine. - */ -static rtems_isr Clock_isr(rtems_vector_number vector) -{ - uint16_t tcr; - - /* reset the timer underflow flag */ - tcr = read16(SH7750_TCR0); - write16(tcr & ~SH7750_TCR_UNF, SH7750_TCR0); - - /* Increment the clock interrupt counter */ - Clock_driver_ticks++ ; - - /* Invoke rtems clock service routine */ - rtems_clock_tick(); -} - -/* - * Install_clock - * - * Install a clock tick handler and reprograms the chip. This - * is used to initially establish the clock tick. - * - * SIDE EFFECTS: - * Establish clock interrupt handler, configure Timer 0 hardware - */ -static void Install_clock(rtems_isr_entry clock_isr) -{ - int cpudiv = 1; /* CPU frequency divider */ - int tidiv = 1; /* Timer input frequency divider */ - uint32_t timer_divider; /* Calculated Timer Divider value */ - uint8_t temp8; - uint16_t temp16; - - /* - * Initialize the clock tick device driver variables - */ - - Clock_driver_ticks = 0; - - /* Get CPU frequency divider from clock unit */ - switch (read16(SH7750_FRQCR) & SH7750_FRQCR_IFC) { - case SH7750_FRQCR_IFCDIV1: - cpudiv = 1; - break; - - case SH7750_FRQCR_IFCDIV2: - cpudiv = 2; - break; - - case SH7750_FRQCR_IFCDIV3: - cpudiv = 3; - break; - - case SH7750_FRQCR_IFCDIV4: - cpudiv = 4; - break; - - case SH7750_FRQCR_IFCDIV6: - cpudiv = 6; - break; - - case SH7750_FRQCR_IFCDIV8: - cpudiv = 8; - break; - - default: - rtems_fatal_error_occurred( RTEMS_NOT_CONFIGURED); - } - - /* Get peripheral module frequency divider from clock unit */ - switch (read16(SH7750_FRQCR) & SH7750_FRQCR_PFC) { - case SH7750_FRQCR_PFCDIV2: - tidiv = 2 * CLOCK_PRESCALER; - break; - - case SH7750_FRQCR_PFCDIV3: - tidiv = 3 * CLOCK_PRESCALER; - break; - - case SH7750_FRQCR_PFCDIV4: - tidiv = 4 * CLOCK_PRESCALER; - break; - - case SH7750_FRQCR_PFCDIV6: - tidiv = 6 * CLOCK_PRESCALER; - break; - - case SH7750_FRQCR_PFCDIV8: - tidiv = 8 * CLOCK_PRESCALER; - break; - - default: - rtems_fatal_error_occurred( RTEMS_NOT_CONFIGURED); - } - timer_divider = - (bsp_clicks_per_second * cpudiv / (tidiv*1000000)) * - rtems_configuration_get_microseconds_per_tick(); - - /* - * Hardware specific initialization - */ - - /* Stop the Timer 0 */ - temp8 = read8(SH7750_TSTR); - temp8 &= ~SH7750_TSTR_STR0; - write8(temp8, SH7750_TSTR); - - /* Establish interrupt handler */ - rtems_interrupt_catch( Clock_isr, CLOCK_VECTOR, &Old_ticker ); - - /* Reset counter */ - write32(timer_divider, SH7750_TCNT0); - - /* Load divider */ - write32(timer_divider, SH7750_TCOR0); - - write16( - SH7750_TCR_UNIE | /* Enable Underflow Interrupt */ - SH7750_TCR_CKEG_RAISE | /* Count on rising edge */ - TCR0_TPSC, /* Timer prescaler ratio */ - SH7750_TCR0); - - /* Set clock interrupt priority */ - temp16 = read16(SH7750_IPRA); - temp16 = (temp16 & ~SH7750_IPRA_TMU0) | (CLOCKPRIO << SH7750_IPRA_TMU0_S); - write16(temp16, SH7750_IPRA); - - /* Start the Timer 0 */ - temp8 = read8(SH7750_TSTR); - temp8 |= SH7750_TSTR_STR0; - write8(temp8, SH7750_TSTR); - - /* - * Schedule the clock cleanup routine to execute if the application exits. - */ - atexit( Clock_exit ); -} - -/* - * Clock_exit - * - * Clean up before the application exits - * - * SIDE EFFECTS: - * Stop Timer 0 counting, set timer 0 interrupt priority level to 0. - */ -void -Clock_exit(void) -{ - uint8_t temp8 = 0; - uint16_t temp16 = 0; - - /* turn off the timer interrupts */ - /* Stop the Timer 0 */ - temp8 = read8(SH7750_TSTR); - temp8 &= ~SH7750_TSTR_STR0; - write8(temp8, SH7750_TSTR); - - /* Lower timer interrupt priority to 0 */ - temp16 = read16(SH7750_IPRA); - temp16 = (temp16 & ~SH7750_IPRA_TMU0) | (0 << SH7750_IPRA_TMU0_S); - write16(temp16, SH7750_IPRA); - - /* old vector shall not be installed */ -} - -/* - * Clock_initialize - * - * Device driver entry point for clock tick driver initialization. - */ -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - Install_clock( Clock_isr ); - - return RTEMS_SUCCESSFUL; -} |