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/*
* Cirrus EP7312 Startup code
*
* Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE.
*
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libcsupport.h>
#include <rtems/libio.h>
#include <ep7312.h>
#include <uart.h>
/*************************************************************/
/* Macros */
/*************************************************************/
/*************************************************************/
/* Data Structures */
/*************************************************************/
/*************************************************************/
/* Global Variables */
/*************************************************************/
extern void *_flash_size;
extern void *_flash_base;
extern void *_sdram_size;
extern void *_sdram_base;
extern void *_bss_free_start;
unsigned long free_mem_start;
unsigned long free_mem_end;
/* The original BSP configuration table from the application and our copy of it
with some changes. */
extern rtems_configuration_table Configuration;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table; /* CPU configuration table. */
char *rtems_progname; /* Program name - from main(). */
/*************************************************************/
/* Function prototypes */
/*************************************************************/
extern void rtems_irq_mngt_init(void);
void bsp_libc_init( void *, uint32_t, int );
void bsp_postdriver_hook(void);
/**************************************************************************/
/* */
/* NAME: bps_pretasking_hook - Function to setup system before startup */
/* */
/* DESCRIPTION: */
/* This function is called before drivers are initialized and used */
/* to setup libc and BSP extensions. It configures non cacheable */
/* SDRAM, SRAM, AIM, and ADM regions and sets up the CPU's memory */
/* protection unit. */
/* */
/* GLOBALS USED: */
/* free_mem_start */
/* free_mem_end */
/* */
/* RESTRICTIONS/LIMITATIONS: */
/* Since this function is setting up libc, it cannot use and libc */
/* functions. */
/* */
/**************************************************************************/
void bsp_pretasking_hook(void)
{
uint32_t heap_start;
uint32_t heap_size;
/*
* Set up the heap. It uses all free SDRAM except that reserved
* for non-cached uses.
*/
heap_start = free_mem_start;
/* heap_size = (free_mem_end - heap_start - MEM_NOCACHE_SIZE); */
heap_size = 0x200000;
bsp_libc_init((void *)heap_start, heap_size, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable(RTEMS_DEBUG_ALL_MASK);
#endif /* RTEMS_DEBUG */
} /* bsp_pretasking_hook */
/**************************************************************************/
/* */
/* NAME: bsp_start_default - BSP initialization function */
/* */
/* DESCRIPTION: */
/* This function is called before RTEMS is initialized and used */
/* adjust the kernel's configuration. */
/* */
/* This function also configures the CPU's memory protection unit. */
/* */
/* GLOBALS USED: */
/* CPU_table */
/* BSP_Configuration */
/* free_mem_start */
/* free_mem_end */
/* free_mem_nocache_start */
/* _bss_free_start */
/* mpu_region_tbl */
/* */
/* */
/* */
/* */
/* RESTRICTIONS/LIMITATIONS: */
/* Since RTEMS is not configured, no RTEMS functions can be called. */
/* */
/**************************************************************************/
void bsp_start_default( void )
{
/* disable interrupts */
*EP7312_INTMR1 = 0;
*EP7312_INTMR2 = 0;
Cpu_table.pretasking_hook = bsp_pretasking_hook;
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.do_zero_of_workspace = TRUE;
/* Place RTEMS workspace at beginning of free memory. */
BSP_Configuration.work_space_start = (void *)&_bss_free_start;
free_mem_start = ((uint32_t)&_bss_free_start +
BSP_Configuration.work_space_size);
free_mem_end = ((uint32_t)&_sdram_base + (uint32_t)&_sdram_size);
/*
* Init rtems exceptions management
*/
rtems_exception_init_mngt();
/*
* Init rtems interrupt management
*/
rtems_irq_mngt_init();
/*
* The following information is very useful when debugging.
*/
#if 0
printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions );
printk( "microseconds_per_tick = 0x%x\n",
BSP_Configuration.microseconds_per_tick );
printk( "ticks_per_timeslice = 0x%x\n",
BSP_Configuration.ticks_per_timeslice );
printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices );
printk( "number_of_device_drivers = 0x%x\n",
BSP_Configuration.number_of_device_drivers );
printk( "Device_driver_table = 0x%x\n",
BSP_Configuration.Device_driver_table );
/* printk( "_stack_size = 0x%x\n", _stack_size );*/
printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start );
printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
#endif
} /* bsp_start */
/*
* By making this a weak alias for bsp_start_default, a brave soul
* can override the actual bsp_start routine used.
*/
void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
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