/** * @file bspstart.c * * This file contains the GBA BSP startup package. * It includes application, board, and monitor specific initialization and * configuration. The generic CPU dependent initialization has been * performed before this routine is invoked. */ /* * RTEMS GBA BSP * * Copyright (c) 2004 Markku Puro * * The license and distribution terms for this file may be * found in found in the file LICENSE in this distribution or at * http://www.rtems.com/license/LICENSE. * * $Id$ */ #include #include #include #include #include #include #include #define BSP_DEBUG 0 /* Global Variables, Defined in 'linkcmds' */ extern void _end; extern void _stack_size; extern void _irq_max_vector; extern void __heap_limit; extern void __ro_start; extern void __ro_end; extern void __data_start; extern void __data_end; extern void __load_start_data; extern void __load_stop_data; extern void __ewram_start; extern void __ewram_end; extern void __load_start_ewram; extern void __load_stop_ewram; extern void __iwram_start; extern void __iwram_end; extern void __load_start_iwram; extern void __load_stop_iwram; extern void __bss_start; extern void __bss_end; /** The original BSP configuration table from the application. */ extern rtems_configuration_table Configuration; /** Our copy of BSP configuration table from the application. */ rtems_configuration_table BSP_Configuration; /* External Prototypes */ extern void bsp_cleanup( void ); extern void rtems_irq_mngt_init(void); extern void bsp_libc_init( void *, rtems_unsigned32, int ); extern void bsp_postdriver_hook(void); /** Chip registers */ volatile unsigned int *Regs = (unsigned int *)GBA_IO_REGS_ADDR; /** * Size of heap if it is 0 it will be dynamically defined by memory size, * otherwise the value should be changed by binary patch */ rtems_unsigned32 _heap_size = 0; /** Address of start of free memory - should be updated after creating new partitions or regions.*/ rtems_unsigned32 rtemsFreeMemStart; /** CPU configuration table. */ rtems_cpu_table Cpu_table; /** Program name - from main(). */ char *rtems_progname; /** * @brief BSP pretasking hook. * * Called just before drivers are initialized. * Used to setup libc and install any BSP extensions. * * NOTE: Must not use libc (to do io) from here, since drivers are not yet initialized. * * @param None * @return None */ void bsp_pretasking_hook(void) { if (_heap_size == 0) { _heap_size = (rtems_unsigned32)&__heap_limit - rtemsFreeMemStart; } bsp_libc_init((void *)rtemsFreeMemStart, _heap_size, 0); rtemsFreeMemStart += _heap_size; #ifdef RTEMS_DEBUG rtems_debug_enable(RTEMS_DEBUG_ALL_MASK); #endif /* RTEMS_DEBUG */ #if BSP_DEBUG /* The following information is very useful when debugging. */ printk("[bsp_pretasking_hook]\n"); printk("_heap_size = 0x%x\n", _heap_size); printk("_stack_size = 0x%x\n", (rtems_unsigned32)&_stack_size); printk("_irq_max_vector = 0x%x\n", (rtems_unsigned32)&_irq_max_vector); printk("__ro_start = 0x%x : __ro_end = 0x%x\n", (rtems_unsigned32)&__ro_start, (rtems_unsigned32)&__ro_end); printk("__ewram_start = 0x%x : __ewram_end = 0x%x\n", (rtems_unsigned32)&__ewram_start, (rtems_unsigned32)&__ewram_end); printk("__data_start = 0x%x : __data_end = 0x%x\n", (rtems_unsigned32)&__data_start, (rtems_unsigned32)&__data_end); printk("__bss_start = 0x%x : __bss_end = 0x%x\n", (rtems_unsigned32)&__bss_start,(rtems_unsigned32)&__bss_end); printk("__iwram_start = 0x%x : __iwram_end = 0x%x\n", (rtems_unsigned32)&__iwram_start,(rtems_unsigned32)&__iwram_end); printk("__load_start_iwram = 0x%x\n", (rtems_unsigned32)&__load_start_iwram); printk("__load_stop_iwram = 0x%x\n", (rtems_unsigned32)&__load_stop_iwram); printk("__load_start_ewram = 0x%x\n", (rtems_unsigned32)&__load_start_ewram); printk("__load_stop_ewram = 0x%x\n", (rtems_unsigned32)&__load_stop_ewram); printk("__load_start_data = 0x%x\n", (rtems_unsigned32)&__load_start_data); printk("__load_stop_data = 0x%x\n", (rtems_unsigned32)&__load_stop_data); #endif } /** * @brief BSP Start * * Called before main is invoked. * * @param None * @return None */ void bsp_start_default( void ) { /* set the value of start of free memory. */ rtemsFreeMemStart = (rtems_unsigned32)&_end; /* If we don't have command line arguments set default program name. */ Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ Cpu_table.predriver_hook = NULL; /* use system's */ Cpu_table.postdriver_hook = bsp_postdriver_hook; Cpu_table.idle_task = NULL; /* don't override system IDLE task */ Cpu_table.do_zero_of_workspace = TRUE; Cpu_table.interrupt_stack_size = 0; Cpu_table.extra_mpci_receive_server_stack = 0; /* Place RTEMS workspace at beginning of free memory. */ BSP_Configuration.work_space_start = (void *)rtemsFreeMemStart; rtemsFreeMemStart += BSP_Configuration.work_space_size; /* Init conio */ gba_textmode(CO60); /* Init rtems exceptions management */ /*!!!!!GBA - Can't use exception vectors in GBA because they are already in GBA ROM BIOS */ /* rtems_exception_init_mngt(); */ /* Init rtems interrupt management */ rtems_irq_mngt_init(); #if BSP_DEBUG /* The following information is very useful when debugging. */ printk("[bsp_start]\n"); printk("rtemsFreeMemStart= 0x%x\n", rtemsFreeMemStart); printk("__heap_limit = 0x%x\n", (rtems_unsigned32)&__heap_limit); printk("work_space_start = 0x%x size = 0x%x\n", BSP_Configuration.work_space_start,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); #endif /* Do we have enough memory */ if ((rtems_unsigned32)&__heap_limit < rtemsFreeMemStart) { printk("\nFatal Error: Memory overflow[0x%x]!\n",rtemsFreeMemStart); bsp_cleanup(); } } /** * @brief weak alias for bsp_start_default * * 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")));