[e8c785c6] | 1 | /*-------------------------------------------------------------------------+ |
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| 2 | | This file contains the ARM BSP startup package. It includes application, |
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| 3 | | board, and monitor specific initialization and configuration. The generic CPU |
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| 4 | | dependent initialization has been performed before this routine is invoked. |
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| 5 | +--------------------------------------------------------------------------+ |
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| 6 | | |
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| 7 | | Copyright (c) 2000 Canon Research Centre France SA. |
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| 8 | | Emmanuel Raguet, mailto:raguet@crf.canon.fr |
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| 9 | | |
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| 10 | | The license and distribution terms for this file may be |
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| 11 | | found in found in the file LICENSE in this distribution or at |
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| 12 | | http://www.rtems.com/license/LICENSE. |
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| 13 | | |
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| 14 | +--------------------------------------------------------------------------*/ |
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| 15 | |
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| 16 | |
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| 17 | #include <bsp.h> |
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| 18 | #include <rtems/libcsupport.h> |
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| 19 | #include <rtems/libio.h> |
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[17a5e1d8] | 20 | #include <rtems/bspIo.h> |
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[e8c785c6] | 21 | #include <s3c2400.h> |
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[32cf23b1] | 22 | #include <conio.h> |
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[e8c785c6] | 23 | |
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| 24 | /*-------------------------------------------------------------------------+ |
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| 25 | | Global Variables |
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| 26 | +--------------------------------------------------------------------------*/ |
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| 27 | |
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| 28 | extern void *_sdram_size; |
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| 29 | extern void *_sdram_base; |
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| 30 | extern void *_bss_free_start; |
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| 31 | |
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| 32 | unsigned long free_mem_start; |
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| 33 | unsigned long free_mem_end; |
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| 34 | |
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| 35 | /* The original BSP configuration table from the application and our copy of it |
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| 36 | with some changes. */ |
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| 37 | |
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| 38 | extern rtems_configuration_table Configuration; |
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| 39 | rtems_configuration_table BSP_Configuration; |
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| 40 | |
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| 41 | rtems_cpu_table Cpu_table; /* CPU configuration table. */ |
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| 42 | char *rtems_progname = "RTEMS"; /* Program name - from main(). */ |
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| 43 | |
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| 44 | /*-------------------------------------------------------------------------+ |
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| 45 | | External Prototypes |
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| 46 | +--------------------------------------------------------------------------*/ |
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| 47 | extern void rtems_irq_mngt_init(void); |
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| 48 | void bsp_libc_init( void *, uint32_t, int ); |
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| 49 | void bsp_postdriver_hook(void); |
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| 50 | |
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| 51 | /*-------------------------------------------------------------------------+ |
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| 52 | | Function: bsp_pretasking_hook |
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| 53 | | Description: BSP pretasking hook. Called just before drivers are |
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| 54 | | initialized. Used to setup libc and install any BSP |
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| 55 | | extensions. NOTE: Must not use libc (to do io) from here, |
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| 56 | | since drivers are not yet initialized. |
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| 57 | | Global Variables: None. |
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| 58 | | Arguments: None. |
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| 59 | | Returns: Nothing. |
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| 60 | +--------------------------------------------------------------------------*/ |
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| 61 | void bsp_pretasking_hook(void) |
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| 62 | { |
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| 63 | uint32_t heap_start; |
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| 64 | uint32_t heap_size; |
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| 65 | |
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| 66 | /* |
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| 67 | * Set up the heap. |
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| 68 | */ |
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| 69 | heap_start = free_mem_start; |
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| 70 | heap_size = free_mem_end - free_mem_start; |
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| 71 | |
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| 72 | /* call rtems lib init - malloc stuff */ |
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| 73 | bsp_libc_init((void *)heap_start, heap_size, 0); |
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| 74 | |
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| 75 | #ifdef RTEMS_DEBUG |
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| 76 | |
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| 77 | rtems_debug_enable(RTEMS_DEBUG_ALL_MASK); |
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| 78 | |
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| 79 | #endif /* RTEMS_DEBUG */ |
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| 80 | |
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| 81 | } /* bsp_pretasking_hook */ |
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| 82 | |
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| 83 | /*-------------------------------------------------------------------------+ |
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| 84 | | Function: bsp_start |
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| 85 | | Description: Called before main is invoked. |
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| 86 | | Global Variables: None. |
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| 87 | | Arguments: None. |
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| 88 | | Returns: Nothing. |
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| 89 | +--------------------------------------------------------------------------*/ |
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| 90 | void bsp_start_default( void ) |
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| 91 | { |
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| 92 | uint32_t cr; |
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[32cf23b1] | 93 | uint32_t pend,last; |
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| 94 | uint32_t REFCNT; |
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| 95 | int i; |
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[e8c785c6] | 96 | /* If we don't have command line arguments set default program name. */ |
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| 97 | |
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| 98 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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| 99 | Cpu_table.predriver_hook = NULL; /* use system's */ |
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| 100 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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| 101 | Cpu_table.idle_task = NULL; |
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| 102 | |
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| 103 | Cpu_table.do_zero_of_workspace = TRUE; |
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| 104 | Cpu_table.interrupt_stack_size = 4096; |
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| 105 | Cpu_table.extra_mpci_receive_server_stack = 0; |
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| 106 | |
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[32cf23b1] | 107 | /* setup rCLKCON */ |
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| 108 | /* disable all but IIS,IIC,PWMTIMER and LCD */ |
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| 109 | rCLKCON=0x6048; |
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| 110 | |
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| 111 | /* stop RTC */ |
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| 112 | rTICINT=0x0; |
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| 113 | |
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| 114 | /* stop watchdog,ADC and timers */ |
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| 115 | rWTCON=0x0; |
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[e8c785c6] | 116 | rTCON=0x0; |
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[32cf23b1] | 117 | rADCCON=0x0; |
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[e8c785c6] | 118 | |
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| 119 | /* disable interrupts */ |
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| 120 | rINTMOD=0x0; |
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| 121 | rINTMSK=BIT_ALLMSK; /* unmasked by drivers */ |
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[32cf23b1] | 122 | /*rSRCPND=BIT_ALLMSK; |
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[e8c785c6] | 123 | rINTMSK=BIT_ALLMSK; |
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[32cf23b1] | 124 | rINTPND=BIT_ALLMSK;*/ |
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| 125 | for(i=0; i<4; i++) { |
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| 126 | pend=rSRCPND; |
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| 127 | if(pend == 0 || pend == last) |
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| 128 | break; |
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| 129 | rSRCPND=pend; |
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| 130 | rINTPND=pend; |
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| 131 | last=pend; |
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| 132 | } |
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| 133 | |
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| 134 | /* setup clocks */ |
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| 135 | rCLKDIVN=M_CLKDIVN; |
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[e8c785c6] | 136 | rMPLLCON=((M_MDIV<<12)+(M_PDIV<<4)+M_SDIV); |
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[32cf23b1] | 137 | /* setup rREFRESH */ |
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| 138 | REFCNT=2048+1-(15.6*get_HCLK()/1000000); /* period=15.6 us, HCLK=66Mhz, (2048+1-15.6*66) */ |
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| 139 | rREFRESH=((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT); |
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[e8c785c6] | 140 | |
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| 141 | /* set prescaler for timers 2,3,4 to 16(15+1) */ |
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| 142 | cr=rTCFG0 & 0xFFFF00FF; |
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| 143 | rTCFG0=(cr | (15<<8)); |
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| 144 | |
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| 145 | /* set prescaler for timers 0,1 to 1(0+1) */ |
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| 146 | cr=rTCFG0 & 0xFFFFFF00; |
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| 147 | rTCFG0=(cr | (0<<0)); |
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| 148 | |
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| 149 | /* Place RTEMS workspace at beginning of free memory. */ |
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| 150 | BSP_Configuration.work_space_start = (void *)&_bss_free_start; |
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| 151 | |
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| 152 | free_mem_start = ((uint32_t)&_bss_free_start + BSP_Configuration.work_space_size); |
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| 153 | |
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| 154 | free_mem_end = ((uint32_t)&_sdram_base + (uint32_t)&_sdram_size); |
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| 155 | |
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| 156 | /* |
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| 157 | * Init rtems exceptions management |
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| 158 | */ |
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| 159 | rtems_exception_init_mngt(); |
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| 160 | |
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| 161 | /* |
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| 162 | * Init rtems interrupt management |
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| 163 | */ |
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| 164 | rtems_irq_mngt_init(); |
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| 165 | /* |
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| 166 | * The following information is very useful when debugging. |
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| 167 | */ |
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| 168 | |
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| 169 | #if 0 |
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| 170 | printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size ); |
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| 171 | printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions ); |
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| 172 | printk( "microseconds_per_tick = 0x%x\n", |
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| 173 | BSP_Configuration.microseconds_per_tick ); |
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| 174 | printk( "ticks_per_timeslice = 0x%x\n", |
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| 175 | BSP_Configuration.ticks_per_timeslice ); |
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| 176 | printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices ); |
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| 177 | printk( "number_of_device_drivers = 0x%x\n", |
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| 178 | BSP_Configuration.number_of_device_drivers ); |
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| 179 | printk( "Device_driver_table = 0x%x\n", |
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| 180 | BSP_Configuration.Device_driver_table ); |
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| 181 | |
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| 182 | printk( "_heap_size = 0x%x\n", _heap_size ); |
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| 183 | /* printk( "_stack_size = 0x%x\n", _stack_size );*/ |
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| 184 | printk( "rtemsFreeMemStart = 0x%x\n", rtemsFreeMemStart ); |
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| 185 | printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start ); |
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| 186 | printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size ); |
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| 187 | #endif |
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| 188 | |
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| 189 | } |
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| 190 | |
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| 191 | /* |
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| 192 | * By making this a weak alias for bsp_start_default, a brave soul |
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| 193 | * can override the actual bsp_start routine used. |
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| 194 | */ |
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| 195 | |
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| 196 | void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default"))); |
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| 197 | |
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| 198 | void bsp_reset(void) |
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| 199 | { |
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| 200 | rtems_interrupt_level level; |
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| 201 | _CPU_ISR_Disable(level); |
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| 202 | printk("bsp_reset.....\n"); |
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[32cf23b1] | 203 | ShowConIO(); |
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[e8c785c6] | 204 | while(1); |
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| 205 | } |
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