forked from Imagelibrary/rtems
54d87f2e52
Remove parameters from ppc_exc_initialize() since all BSPs passed the same values. Update #3459.
131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/**
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* @file
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*
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* @ingroup mpc83xx
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*
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* @brief Source for BSP startup code.
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*/
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/*
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* Copyright (c) 2008-2014 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <info@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems/counter.h>
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#include <libchip/ns16550.h>
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#include <libcpu/powerpc-utility.h>
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#include <bsp.h>
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#include <bsp/vectors.h>
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#include <bsp/bootcard.h>
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#include <bsp/irq-generic.h>
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#include <bsp/linker-symbols.h>
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#include <bsp/u-boot.h>
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#include <bsp/console-termios.h>
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/* Configuration parameters for console driver, ... */
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unsigned int BSP_bus_frequency;
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/* Configuration parameter for clock driver */
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uint32_t bsp_time_base_frequency;
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/* Legacy */
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uint32_t bsp_clicks_per_usec;
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/* Default decrementer exception handler */
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static int mpc83xx_decrementer_exception_handler( BSP_Exception_frame *frame, unsigned number)
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{
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ppc_set_decrementer_register(UINT32_MAX);
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return 0;
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}
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uint32_t _CPU_Counter_frequency(void)
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{
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return bsp_time_base_frequency;
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}
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void bsp_start( void)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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unsigned long i = 0;
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/*
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* Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
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* store the result in global variables so that it can be used latter...
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*/
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get_ppc_cpu_type();
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get_ppc_cpu_revision();
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/* Basic CPU initialization */
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cpu_init();
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/*
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* Enable instruction and data caches. Do not force writethrough mode.
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*/
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#ifdef BSP_INSTRUCTION_CACHE_ENABLED
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rtems_cache_enable_instruction();
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#endif
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#ifdef BSP_DATA_CACHE_ENABLED
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rtems_cache_enable_data();
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#endif
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/*
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* This is evaluated during runtime, so it should be ok to set it
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* before we initialize the drivers.
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*/
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/* Initialize some device driver parameters */
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#ifdef HAS_UBOOT
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BSP_bus_frequency = bsp_uboot_board_info.bi_busfreq;
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#else /* HAS_UBOOT */
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BSP_bus_frequency = BSP_CLKIN_FRQ * BSP_SYSPLL_MF / BSP_SYSPLL_CKID;
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#endif /* HAS_UBOOT */
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bsp_time_base_frequency = BSP_bus_frequency / 4;
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bsp_clicks_per_usec = bsp_time_base_frequency / 1000000;
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/* Initialize some console parameters */
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for (i = 0; i < console_device_count; ++i) {
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ns16550_context *ctx = (ns16550_context *) console_device_table[i].context;
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ctx->clock = BSP_bus_frequency;
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#ifdef HAS_UBOOT
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ctx->initial_baud = bsp_uboot_board_info.bi_baudrate;
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#endif
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}
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/* Initialize exception handler */
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#ifndef BSP_DATA_CACHE_ENABLED
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ppc_exc_cache_wb_check = 0;
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#endif
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ppc_exc_initialize();
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/* Install default handler for the decrementer exception */
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sc = ppc_exc_set_handler( ASM_DEC_VECTOR, mpc83xx_decrementer_exception_handler);
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if (sc != RTEMS_SUCCESSFUL) {
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rtems_panic("cannot install decrementer exception handler");
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}
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/* Initalize interrupt support */
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bsp_interrupt_initialize();
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#ifdef SHOW_MORE_INIT_SETTINGS
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printk("Exit from bspstart\n");
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#endif
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}
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