/* * This routine starts the application. It includes application, * board, and monitor specific initialization and configuration. * The generic CPU dependent initialization has been performed * before this routine is invoked. * * COPYRIGHT (c) 1989-1998. * On-Line Applications Research Corporation (OAR). * Copyright assigned to U.S. Government, 1994. * * 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. * * Modified to support the MCP750. * Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr * * $Id$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern void _return_to_ppcbug(); extern unsigned long __rtems_end; extern unsigned long _end; extern unsigned long __bss_start; extern void L1_caches_enables(); extern unsigned get_L2CR(); extern void set_L2CR(unsigned); extern void bsp_cleanup(void); /* * Copy of residuals passed by firmware */ RESIDUAL residualCopy; /* * Copy Additional boot param passed by boot loader */ #define MAX_LOADER_ADD_PARM 80 char loaderParam[MAX_LOADER_ADD_PARM]; /* * Vital Board data Start using DATA RESIDUAL */ /* * Total memory using RESIDUAL DATA */ unsigned int BSP_mem_size; /* * PCI Bus Frequency */ unsigned int BSP_bus_frequency; /* * processor clock frequency */ unsigned int BSP_processor_frequency; /* * Time base divisior (how many tick for 1 second). */ unsigned int BSP_time_base_divisor; /* * system init stack and soft ir stack size */ #define INIT_STACK_SIZE 0x1000 #define INTR_STACK_SIZE CONFIGURE_INTERRUPT_STACK_MEMORY void BSP_panic(char *s) { printk("%s PANIC %s\n",_RTEMS_version, s); __asm__ __volatile ("sc"); } void _BSP_Fatal_error(unsigned int v) { printk("%s PANIC ERROR %x\n",_RTEMS_version, v); __asm__ __volatile ("sc"); } /* * 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; char *rtems_progname; /* * Use the shared implementations of the following routines */ void bsp_postdriver_hook(void); void bsp_libc_init( void *, unsigned32, int ); /* * Function: bsp_pretasking_hook * Created: 95/03/10 * * Description: * BSP pretasking hook. Called just before drivers are initialized. * Used to setup libc and install any BSP extensions. * * NOTES: * Must not use libc (to do io) from here, since drivers are * not yet initialized. * */ void bsp_pretasking_hook(void) { rtems_unsigned32 heap_start; rtems_unsigned32 heap_size; heap_start = ((rtems_unsigned32) &__rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE; if (heap_start & (CPU_ALIGNMENT-1)) heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size; #ifdef SHOW_MORE_INIT_SETTINGS printk(" HEAP start %x size %x\n", heap_start, heap_size); #endif bsp_libc_init((void *) heap_start, heap_size, 0); #ifdef RTEMS_DEBUG rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); #endif } void zero_bss() { memset(&__bss_start, 0, ((unsigned) (&__rtems_end)) - ((unsigned) &__bss_start)); } void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options) { residualCopy = *r3; strncpy(loaderParam, additional_boot_options, MAX_LOADER_ADD_PARM); loaderParam[MAX_LOADER_ADD_PARM - 1] ='\0'; } /* * bsp_start * * This routine does the bulk of the system initialization. */ void bsp_start( void ) { int err; unsigned char *stack; unsigned l2cr; register unsigned char* intrStack; register unsigned int intrNestingLevel = 0; unsigned char *work_space_start; ppc_cpu_id_t myCpu; ppc_cpu_revision_t myCpuRevision; prep_t boardManufacturer; motorolaBoard myBoard; /* * Get CPU identification dynamically. Note that the get_ppc_cpu_type() function * store the result in global variables so that it can be used latter... */ myCpu = get_ppc_cpu_type(); myCpuRevision = get_ppc_cpu_revision(); /* * enables L1 Cache. Note that the L1_caches_enables() codes checks for * relevant CPU type so that the reason why there is no use of myCpu... */ L1_caches_enables(); /* * Enable L2 Cache. Note that the set_L2CR(L2CR) codes checks for * relevant CPU type (mpc750)... */ l2cr = get_L2CR(); #ifdef SHOW_LCR2_REGISTER printk("Initial L2CR value = %x\n", l2cr); #endif if ( (! (l2cr & 0x80000000)) && ((int) l2cr == -1)) set_L2CR(0xb9A14000); /* * the initial stack has aready been set to this value in start.S * so there is no need to set it in r1 again... It is just for info * so that It can be printed without accessing R1. */ stack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; /* * Initialize the interrupt related settings * SPRG0 = interrupt nesting level count * SPRG1 = software managed IRQ stack * * This could be done latter (e.g in IRQ_INIT) but it helps to understand * some settings below... */ intrStack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE; asm volatile ("mtspr 273, %0" : "=r" (intrStack) : "0" (intrStack)); asm volatile ("mtspr 272, %0" : "=r" (intrNestingLevel) : "0" (intrNestingLevel)); /* * Initialize default raw exception hanlders. See vectors/vectors_init.c */ initialize_exceptions(); /* * Init MMU block address translation to enable hardware * access */ /* * PC legacy IO space used for inb/outb and all PC * compatible hardware */ setdbat(1, 0x80000000, 0x80000000, 0x10000000, IO_PAGE); /* * PCI devices memory area. Needed to access OPENPIC features * provided by the RAVEN */ setdbat(2, 0xc0000000, 0xc0000000, 0x08000000, IO_PAGE); /* * Must have acces to open pic PCI ACK registers * provided by the RAVEN */ setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE); select_console(CONSOLE_LOG); /* We check that the keyboard is present and immediately * select the serial console if not. */ err = kbdreset(); if (err) select_console(CONSOLE_SERIAL); boardManufacturer = checkPrepBoardType(&residualCopy); if (boardManufacturer != PREP_Motorola) { printk("Unsupported hardware vendor\n"); while (1); } myBoard = getMotorolaBoard(); printk("-----------------------------------------\n"); printk("Welcome to %s on %s\n", _RTEMS_version, motorolaBoardToString(myBoard)); printk("-----------------------------------------\n"); #ifdef SHOW_MORE_INIT_SETTINGS printk("Residuals are located at %x\n", (unsigned) &residualCopy); printk("Additionnal boot options are %s\n", loaderParam); printk("Initial system stack at %x\n",stack); printk("Software IRQ stack at %x\n",intrStack); printk("-----------------------------------------\n"); #endif #ifdef TEST_RETURN_TO_PPCBUG printk("Hit to return to PPCBUG monitor\n"); printk("When Finished hit GO. It should print \n"); debug_getc(); _return_to_ppcbug(); printk("Back from monitor\n"); _return_to_ppcbug(); #endif /* TEST_RETURN_TO_PPCBUG */ #ifdef SHOW_MORE_INIT_SETTINGS printk("Going to start PCI buses scanning and initialization\n"); #endif InitializePCI(); #ifdef SHOW_MORE_INIT_SETTINGS printk("Number of PCI buses found is : %d\n", BusCountPCI()); #endif #ifdef TEST_RAW_EXCEPTION_CODE printk("Testing exception handling Part 1\n"); /* * Cause a software exception */ __asm__ __volatile ("sc"); /* * Check we can still catch exceptions and returned coorectly. */ printk("Testing exception handling Part 2\n"); __asm__ __volatile ("sc"); #endif BSP_mem_size = residualCopy.TotalMemory; BSP_bus_frequency = residualCopy.VitalProductData.ProcessorBusHz; BSP_processor_frequency = residualCopy.VitalProductData.ProcessorHz; BSP_time_base_divisor = (residualCopy.VitalProductData.TimeBaseDivisor? residualCopy.VitalProductData.TimeBaseDivisor : 4000); /* * Set up our hooks * Make sure libc_init is done before drivers initialized so that * they can use atexit() */ Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ 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 = BSP_processor_frequency/(BSP_time_base_divisor * 1000); Cpu_table.exceptions_in_RAM = TRUE; #ifdef SHOW_MORE_INIT_SETTINGS printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size); #endif work_space_start = (unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size; if ( work_space_start <= ((unsigned char *)&__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) { printk( "bspstart: Not enough RAM!!!\n" ); bsp_cleanup(); } BSP_Configuration.work_space_start = work_space_start; /* * Initalize RTEMS IRQ system */ BSP_rtems_irq_mng_init(0); #ifdef SHOW_MORE_INIT_SETTINGS printk("Exit from bspstart\n"); #endif }