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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [powerpc/] [ppcn_60x/] [startup/] [bspstart.c] - Rev 593
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/* * COPYRIGHT (c) 1998 by Radstone Technology * * * THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK * AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU. * * You are hereby granted permission to use, copy, modify, and distribute * this file, provided that this notice, plus the above copyright notice * and disclaimer, appears in all copies. Radstone Technology will provide * no support for this code. * */ /* bspstart.c * * This set of routines starts the application. It includes application, * board, and monitor specific initialization and configuration. * The generic CPU dependent initialization has been performed * before any of these are invoked. * * COPYRIGHT (c) 1989-1997. * On-Line Applications Research Corporation (OAR). * Copyright assigned to U.S. Government, 1994. * * The license and distribution terms for this file may in * the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: */ #include <bsp.h> #include <pci.h> #include <rtems/libio.h> #include <libcsupport.h> unsigned char ucSystemType; unsigned char ucBoardRevMaj; unsigned char ucBoardRevMin; unsigned long ulMemorySize; unsigned long ulCpuBusClock; /* * The bus speed is expressed in MHz */ static unsigned long ulBusSpeed[] = { 56250000, 60000000, 64300000, 66666667, 75000000, 83333333, 100000000, 66666667 }; /* * The original 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; rtems_unsigned32 bsp_isr_level; static int stdin_fd, stdout_fd, stderr_fd; /* * End of RTEMs image imported from linker */ extern int end; /* * Use the shared implementations of the following routines */ void bsp_postdriver_hook(void); void bsp_libc_init( void *, unsigned32, int ); /* * bsp_pretasking_hook * * BSP pretasking hook. Called just before drivers are initialized. * Used to setup libc and install any BSP extensions. */ void bsp_pretasking_hook(void) { rtems_unsigned32 heap_start; rtems_unsigned32 heap_size; heap_start = (rtems_unsigned32) &end; if (heap_start & (CPU_ALIGNMENT-1)) heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); heap_size = BSP_Configuration.work_space_start - (void *)&end; heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ bsp_libc_init((void *) heap_start, heap_size, 0); /* * Initialise RTC hooks based on system type */ InitializeRTC(); /* * Initialise NvRAM hooks based on system type */ InitializeNvRAM(); /* * Initialise the PCI bus(ses) */ InitializePCI(); /* * Initialize the Universe PCI-VME bridge */ InitializeUniverse(); #ifdef RTEMS_DEBUG rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); #endif } /* * bsp_std_close * * Simple routine to close all standard IO streams. */ void bsp_std_close( void ) { close(stdin_fd); close(stdout_fd); close(stderr_fd); } /* * bsp_predriver_hook * * Before drivers are setup. */ void bsp_predriver_hook(void) { /* bsp_spurious_initialize; ??*/ initialize_external_exception_vector(); } /* * bsp_start * * This routine does the bulk of the system initialization. */ void bsp_start( void ) { unsigned char *work_space_start; unsigned char ucBoardRev, ucMothMemType, ucEquipPres1, ucEquipPres2; unsigned16 usPVR=0; unsigned8 ucTempl, ucTemph; unsigned8 ucBanksPresent; unsigned8 ucSimmPresent; unsigned32 ulCurBank, ulTopBank; /* * Determine system type */ inport_byte(&((PPLANARREGISTERS)0)->MotherboardMemoryType, ucMothMemType); inport_byte(&((PPLANARREGISTERS)0)->SimmPresent, ucSimmPresent); inport_byte(&((PPLANARREGISTERS)0)->EquipmentPresent1, ucEquipPres1); inport_byte(&((PPLANARREGISTERS)0)->EquipmentPresent2, ucEquipPres2); ucSystemType=((ucMothMemType&0x03)<<1) | ((ucEquipPres1&0x80)>>7); ucSystemType^=7; /* * Determine board revision for use by rev. specific code */ inport_byte(&((PPLANARREGISTERS)0)->BoardRevision, ucBoardRev); ucBoardRevMaj=ucBoardRev>>5; ucBoardRevMin=ucBoardRev&0x1f; /* * Determine the memory size by reading the end address for top * assigned bank in the memory controller */ (void)PCIConfigRead8(0,0,0,0xa0, &ucBanksPresent); for(ulCurBank=0;ulCurBank<8;ulCurBank++) { if((ucBanksPresent>>ulCurBank)&0x01) { ulTopBank=ulCurBank; } } (void)PCIConfigRead8(0,0,0,0x90+ulTopBank, &ucTempl); (void)PCIConfigRead8(0,0,0,0x98+ulTopBank, &ucTemph); ulMemorySize=(ucTempl+(ucTemph<<8)+1)<<20; #if PPCN_60X_USE_DINK ulMemorySize=0x01fe0000; #endif /* * Determine processor bus clock */ asm volatile ("mfpvr %0" : "=r" ((usPVR)) : "0" ((usPVR))); /* * Determine processor internal clock */ if(ucSystemType==SYS_TYPE_PPC4) { if(((ucBoardRevMaj==1) && (ucBoardRevMin==0)) || ((ucSimmPresent&0x40)==0)) { /* * Rev. 1A is always 66MHz */ ulCpuBusClock=66666667; } else { ulCpuBusClock=83333333; } } else if((((usPVR>>16)==MPC603e) && (ucSystemType!=SYS_TYPE_PPC1)) || ((usPVR>>16)==MPC603ev) || ((usPVR>>16)==MPC604e)) { ulCpuBusClock=ulBusSpeed[(ucEquipPres2&0x1c)>>2]; } else { if(((ucSystemType>SYS_TYPE_PPC1) || (ucBoardRevMaj>=5)) && (ucEquipPres1&0x08)) { /* * 66 MHz bus clock for 005 if indicated */ ulCpuBusClock=66666667; } else { /* * 33 MHz bus clock for 004 always */ ulCpuBusClock=33333333; } } /* * Allocate the memory for the RTEMS Work Space. This can come from * a variety of places: hard coded address, malloc'ed from outside * RTEMS world (e.g. simulator or primitive memory manager), or (as * typically done by stock BSPs) by subtracting the required amount * of work space from the last physical address on the CPU board. */ work_space_start = (unsigned char *)ulMemorySize - BSP_Configuration.work_space_size; if ( work_space_start <= (unsigned char *)&end ) { DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); bsp_cleanup(); } BSP_Configuration.work_space_start = work_space_start; /* * initialize the CPU table for this BSP */ Cpu_table.exceptions_in_RAM = TRUE; Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ Cpu_table.predriver_hook = bsp_predriver_hook; Cpu_table.postdriver_hook = bsp_postdriver_hook; Cpu_table.do_zero_of_workspace = TRUE; Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; Cpu_table.clicks_per_usec = ulCpuBusClock/4000000; }
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