/* * 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) 1989-2007. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rtems.com/license/LICENSE. * * Modified to support the MCP750. * Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr * * Modified to support the Synergy VGM & Motorola PowerPC boards * (C) by Till Straumann, , 2002, 2004, 2005 * * Modified to support the MVME5500 board. * Also, the settings of L1, L2, and L3 caches is not necessary here. * (C) by Brookhaven National Lab., S. Kate Feng , 2003, 2004, 2005 * * $Id$ */ #include #include #include #include #include #include #include #include /* registers.h is included here */ #include #include #include #include #include #include #include #include #include #include #ifdef __RTEMS_APPLICATION__ #undef __RTEMS_APPLICATION__ #endif /* #define SHOW_MORE_INIT_SETTINGS #define SHOW_LCR1_REGISTER #define SHOW_LCR2_REGISTER #define SHOW_LCR3_REGISTER #define CONF_VPD */ /* there is no public Workspace_Free() variant :-( */ #include BSP_output_char_function_type BSP_output_char = BSP_output_char_via_serial; extern void _return_to_ppcbug(); extern unsigned long __rtems_end[]; extern unsigned get_L1CR(), get_L2CR(), get_L3CR(); extern void bsp_cleanup(void); extern Triv121PgTbl BSP_pgtbl_setup(); extern void BSP_pgtbl_activate(); extern int I2Cread_eeprom(); extern void BSP_vme_config(void); uint32_t bsp_clicks_per_usec; SPR_RW(SPRG0) SPR_RW(SPRG1) typedef struct CmdLineRec_ { unsigned long size; char buf[0]; } CmdLineRec, *CmdLine; #define mtspr(reg, val) \ __asm __volatile("mtspr %0,%1" : : "K"(reg), "r"(val)) #define mfspr(reg) \ ( { unsigned val; \ __asm __volatile("mfspr %0,%1" : "=r"(val) : "K"(reg)); \ val; } ) /* * Copy Additional boot param passed by boot loader */ #define MAX_LOADER_ADD_PARM 80 char loaderParam[MAX_LOADER_ADD_PARM]; /* * Total memory using RESIDUAL DATA */ unsigned int BSP_mem_size; /* * PCI Bus Frequency */ /* * Start of the heap */ unsigned int BSP_heap_start; 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; unsigned char ConfVPD_buff[200]; #define CMDLINE_BUF_SIZE 2048 static char cmdline_buf[CMDLINE_BUF_SIZE]; char *BSP_commandline_string = cmdline_buf; /* * 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 */ extern void bsp_postdriver_hook(void); /* see c/src/lib/libbsp/shared/bsppost.c */ extern void bsp_libc_init( void *, uint32_t, int ); extern void bsp_pretasking_hook(void); void zero_bss() { /* prevent these from being accessed in the short data areas */ extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[]; extern unsigned long __SBSS2_START__[], __SBSS2_END__[]; memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__)); memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__)); memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start)); } /* NOTE: we cannot simply malloc the commandline string; * save_boot_params() is called during a very early stage when * libc/malloc etc. are not yet initialized! * * Here's what we do: * * initial layout setup by the loader (preload.S): * * 0..RTEMS...__rtems_end | cmdline ....... TOP * * After the save_boot_params() routine returns, the stack area will be * set up (start.S): * * 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | ..... TOP * * initialize_executive_early() [called from boot_card()] * will initialize the workspace: * * 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | ...... | workspace | TOP * * and later calls our pretasking_hook() which ends up initializing * libc which in turn initializes the heap * * 0..RTEMS..__rtems_end | INIT_STACK | IRQ_STACK | heap | workspace | TOP * * The idea here is to first move the commandline to the future 'heap' area * from where it will be picked up by our pretasking_hook(). * pretasking_hook() then moves it either to INIT_STACK or the workspace * area using proper allocation, initializes libc and finally moves * the data to the environment / malloced areas... */ /* this routine is called early at shared/start/start.S * and must be safe with a not properly aligned stack */ void save_boot_params(void *r3, void *r4, void* r5, char *cmdline_start, char *cmdline_end) { int i=cmdline_end-cmdline_start; if ( i >= CMDLINE_BUF_SIZE ) i = CMDLINE_BUF_SIZE-1; else if ( i < 0 ) i = 0; memmove(cmdline_buf, cmdline_start, i); cmdline_buf[i]=0; } /* * bsp_start * * This routine does the bulk of the system initialization. */ void bsp_start( void ) { #ifdef CONF_VPD int i; #endif unsigned char *stack; unsigned long *r1sp; #ifdef SHOW_LCR1_REGISTER unsigned l1cr; #endif #ifdef SHOW_LCR2_REGISTER unsigned l2cr; #endif #ifdef SHOW_LCR3_REGISTER unsigned l3cr; #endif register uint32_t intrStack; register uint32_t *intrStackPtr; unsigned char *work_space_start; ppc_cpu_id_t myCpu; ppc_cpu_revision_t myCpuRevision; Triv121PgTbl pt=0; /* Till Straumann: 4/2005 * Need to map the system registers early, so we can printk... * (otherwise we silently die) */ /* * Kate Feng : PCI 0 domain memory space, want to leave room for the VME window */ setdbat(2, PCI0_MEM_BASE, PCI0_MEM_BASE, 0x10000000, IO_PAGE); /* Till Straumann: 2004 * map the PCI 0, 1 Domain I/O space, GT64260B registers * and the reserved area so that the size is the power of 2. * */ setdbat(3,PCI0_IO_BASE, PCI0_IO_BASE, 0x2000000, IO_PAGE); /* * 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(); #ifdef SHOW_LCR1_REGISTER l1cr = get_L1CR(); printk("Initial L1CR value = %x\n", l1cr); #endif /* * 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 - PPC_MINIMUM_STACK_FRAME_SIZE; /* tag the bottom (T. Straumann 6/36/2001 ) */ *((uint32_t *)stack) = 0; /* fill stack with pattern for debugging */ __asm__ __volatile__("mr %0, %%r1":"=r"(r1sp)); while (--r1sp >= (unsigned long*)__rtems_end) *r1sp=0xeeeeeeee; /* * 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... */ BSP_heap_start = ((uint32_t) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE; intrStack = BSP_heap_start - PPC_MINIMUM_STACK_FRAME_SIZE; /* make sure it's properly aligned */ intrStack &= ~(CPU_STACK_ALIGNMENT-1); /* tag the bottom (T. Straumann 6/36/2001 ) */ intrStackPtr = (uint32_t*) intrStack; *intrStackPtr = 0; _write_SPRG1(intrStack); _write_SPRG0(PPC_BSP_HAS_FIXED_PR288); /* * Initialize default raw exception hanlders. See vectors/vectors_init.c */ Cpu_table.exceptions_in_RAM = TRUE; initialize_exceptions(); /* * Init MMU block address translation to enable hardware * access * More PCI1 memory mapping to be done after BSP_pgtbl_activate. */ printk("-----------------------------------------\n"); printk("Welcome to %s on MVME5500-0163\n", _RTEMS_version ); printk("-----------------------------------------\n"); #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 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 = _512M; /* TODO: calculate the BSP_bus_frequency using the REF_CLK bit of System Status register */ /* rtems_bsp_delay_in_bus_cycles are defined in registers.h */ BSP_bus_frequency = 133333333; BSP_processor_frequency = 1000000000; BSP_time_base_divisor = 4000;/* P94 : 7455 clocks the TB/DECR at 1/4 of the system bus clock frequency */ /* Maybe not setup yet becuase of the warning message */ /* Allocate and set up the page table mappings * This is only available on >604 CPUs. * * NOTE: This setup routine may modify the available memory * size. It is essential to call it before * calculating the workspace etc. */ pt = BSP_pgtbl_setup(&BSP_mem_size); if (!pt) printk("WARNING: unable to setup page tables.\n"); printk("Now BSP_mem_size = 0x%x\n",BSP_mem_size); /* * 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; /* P94 : 7455 TB/DECR is clocked by the system bus clock frequency */ Cpu_table.exceptions_in_RAM = TRUE; _CPU_Table = Cpu_table;/* S. Kate Feng , for rtems_bsp_delay() */ bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000); printk("BSP_Configuration.work_space_size = %x\n", BSP_Configuration.work_space_size); 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_LCR2_REGISTER l2cr = get_L2CR(); printk("Initial L2CR value = %x\n", l2cr); #endif #ifdef SHOW_LCR3_REGISTER /* L3CR needs DEC int. handler installed for bsp_delay()*/ l3cr = get_L3CR(); printk("Initial L3CR value = %x\n", l3cr); #endif /* Activate the page table mappings only after * initializing interrupts because the irq_mng_init() * routine needs to modify the text */ if (pt) { #ifdef SHOW_MORE_INIT_SETTINGS printk("Page table setup finished; will activate it NOW...\n"); #endif BSP_pgtbl_activate(pt); } /* * PCI 1 domain memory space */ setdbat(1, PCI1_MEM_BASE, PCI1_MEM_BASE, 0x10000000, IO_PAGE); #ifdef SHOW_MORE_INIT_SETTINGS printk("Going to start PCI buses scanning and initialization\n"); #endif pci_initialize(); #ifdef SHOW_MORE_INIT_SETTINGS printk("Number of PCI buses found is : %d\n", pci_bus_count()); #endif /* Install our own exception handler (needs PCI) */ globalExceptHdl = BSP_exceptionHandler; /* clear hostbridge errors. MCP signal is not used on the MVME5500 * PCI config space scanning code will trip otherwise :-( */ _BSP_clear_hostbridge_errors(0, 1 /*quiet*/); /* Read Configuration Vital Product Data (VPD) */ if ( I2Cread_eeprom(0xa8, 4,2, &ConfVPD_buff[0], 150)) printk("I2Cread_eeprom() error \n"); else { #ifdef CONF_VPD printk("\n"); for (i=0; i<150; i++) { printk("%2x ", ConfVPD_buff[i]); if ((i % 20)==0 ) printk("\n"); } printk("\n"); #endif } #ifdef SHOW_MORE_INIT_SETTINGS printk("MSR %x \n", _read_MSR()); printk("Exit from bspstart\n"); #endif }