forked from Imagelibrary/rtems
6ea100c1f1
* startup/bspstart.c: Refactored and renamed initialization routines to rtems_initialize_data_structures, rtems_initialize_before_drivers, rtems_initialize_device_drivers, and rtems_initialize_start_multitasking. This opened the sequence up so that bootcard() could provide a more robust and flexible framework which is easier to explain and understand. This also lays the groundwork for sharing the division of available memory between the RTEMS workspace and heap and the C library initialization across all BSPs.
115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/*
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* This routine starts the application. It includes application,
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* board, and monitor specific initialization and configuration.
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* The generic CPU dependent initialization has been performed
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* before this routine is invoked.
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*
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* COPYRIGHT (c) 1989-2000.
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* On-Line Applications Research Corporation (OAR).
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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.com/license/LICENSE.
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*
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* $Id$
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*/
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#include <string.h>
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#include <bsp.h>
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#include <libcpu/au1x00.h>
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#include <rtems/libio.h>
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#include <rtems/libcsupport.h>
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/*
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* The original table from the application and our copy of it with
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* some changes.
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*/
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extern void *_sdram_size;
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extern void *_sdram_base;
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extern void *_bss_free_start;
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unsigned long free_mem_start;
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unsigned long free_mem_end;
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au1x00_uart_t *uart0 = (au1x00_uart_t *)AU1X00_UART0_ADDR;
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au1x00_uart_t *uart3 = (au1x00_uart_t *)AU1X00_UART3_ADDR;
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/*
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* Use the shared implementations of the following routines
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*/
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void bsp_libc_init( void *, uint32_t, int );
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/*
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* Function: bsp_pretasking_hook
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* Created: 95/03/10
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*
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* Description:
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* BSP pretasking hook. Called just before drivers are initialized.
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* Used to setup libc and install any BSP extensions.
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*
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* NOTES:
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* Must not use libc (to do io) from here, since drivers are
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* not yet initialized.
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*
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*/
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void bsp_pretasking_hook(void)
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{
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uint32_t heap_start;
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uint32_t heap_size;
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/*
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* Set up the heap.
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*/
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heap_start = free_mem_start;
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heap_size = free_mem_end - free_mem_start;
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/* call rtems lib init - malloc stuff */
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bsp_libc_init((void *)heap_start, heap_size, 0);
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#ifdef RTEMS_DEBUG
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rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
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#endif
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}
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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extern void mips_install_isr_entries(void);
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unsigned int compare = 0;
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/* Place RTEMS workspace at beginning of free memory. */
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Configuration.work_space_start = (void *)&_bss_free_start;
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free_mem_start = ((uint32_t)&_bss_free_start +
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rtems_configuration_get_work_space_size());
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free_mem_end = ((uint32_t)&_sdram_base + (uint32_t)&_sdram_size);
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mips_set_sr( 0x7f00 ); /* all interrupts unmasked but globally off */
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/* depend on the IRC to take care of things */
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asm volatile ("mtc0 %0, $11\n" :: "r" (compare));
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mips_install_isr_entries();
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}
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/* These replace the ones in newlib. I'm not sure why the newlib ones
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* don't work.
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*/
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void _init(void)
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{
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}
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void _fini(void)
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{
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}
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