diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/gba/startup/bspstart.c')
-rw-r--r-- | c/src/lib/libbsp/arm/gba/startup/bspstart.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/gba/startup/bspstart.c b/c/src/lib/libbsp/arm/gba/startup/bspstart.c new file mode 100644 index 0000000000..e21effe7d0 --- /dev/null +++ b/c/src/lib/libbsp/arm/gba/startup/bspstart.c @@ -0,0 +1,197 @@ +/** + * @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 <markku.puro@kopteri.net> + * + * 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 <stdio.h> +#include <bsp.h> +#include <rtems/bspIo.h> +#include <rtems/libio.h> +#include <rtems/libcsupport.h> +#include <gba.h> +#include <conio.h> + +#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"))); 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