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Diffstat (limited to 'c/src/lib/libbsp/arm/edb7312/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/edb7312/startup/bspstart.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/edb7312/startup/bspstart.c b/c/src/lib/libbsp/arm/edb7312/startup/bspstart.c new file mode 100644 index 0000000000..19e8b6d1a0 --- /dev/null +++ b/c/src/lib/libbsp/arm/edb7312/startup/bspstart.c @@ -0,0 +1,186 @@ +/* + * 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.OARcorp.com/rtems/license.html. + * + * + * $Id$ +*/ + +#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 *, unsigned32, 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) +{ + unsigned32 heap_start; + unsigned32 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 = ((unsigned32)&_bss_free_start + + BSP_Configuration.work_space_size); + + free_mem_end = ((unsigned32)&_sdram_base + (unsigned32)&_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"))); |