[8ef3818] | 1 | /* bspstart.c |
---|
| 2 | * |
---|
| 3 | * This set of routines starts the application. It includes application, |
---|
| 4 | * board, and monitor specific initialization and configuration. |
---|
| 5 | * The generic CPU dependent initialization has been performed |
---|
| 6 | * before this routine is invoked. |
---|
| 7 | * |
---|
| 8 | * COPYRIGHT (c) 1989-1998. |
---|
| 9 | * On-Line Applications Research Corporation (OAR). |
---|
| 10 | * |
---|
| 11 | * The license and distribution terms for this file may be |
---|
| 12 | * found in the file LICENSE in this distribution or at |
---|
| 13 | * http://www.OARcorp.com/rtems/license.html. |
---|
| 14 | * |
---|
| 15 | * Modifications for MBX860: |
---|
| 16 | * Copyright (c) 1999, National Research Council of Canada |
---|
| 17 | * |
---|
| 18 | * $Id$ |
---|
| 19 | */ |
---|
| 20 | |
---|
[fd152eb2] | 21 | #include <string.h> |
---|
| 22 | |
---|
[8ef3818] | 23 | #include <bsp.h> |
---|
| 24 | #include <rtems/libio.h> |
---|
[fd152eb2] | 25 | #include <rtems/libcsupport.h> |
---|
[8ef3818] | 26 | |
---|
| 27 | /* |
---|
| 28 | * The original table from the application (in ROM) and our copy of it with |
---|
| 29 | * some changes. Configuration is defined in <confdefs.h>. Make sure that |
---|
| 30 | * our configuration tables are uninitialized so that they get allocated in |
---|
| 31 | * the .bss section (RAM). |
---|
| 32 | */ |
---|
| 33 | extern rtems_configuration_table Configuration; |
---|
| 34 | rtems_configuration_table BSP_Configuration; |
---|
| 35 | |
---|
| 36 | rtems_cpu_table Cpu_table; |
---|
| 37 | |
---|
| 38 | char *rtems_progname; |
---|
| 39 | |
---|
| 40 | /* |
---|
| 41 | * Use the shared implementations of the following routines. |
---|
| 42 | * Look in rtems/c/src/lib/libbsp/shared/bsppost.c and |
---|
| 43 | * rtems/c/src/lib/libbsp/shared/bsplibc.c. |
---|
| 44 | */ |
---|
| 45 | void bsp_postdriver_hook(void); |
---|
| 46 | void bsp_libc_init( void *, unsigned32, int ); |
---|
| 47 | |
---|
| 48 | /* |
---|
| 49 | * bsp_pretasking_hook |
---|
| 50 | * |
---|
| 51 | * Called when RTEMS initialization is complete but before interrupts and |
---|
| 52 | * tasking are enabled. Used to setup libc and install any BSP extensions. |
---|
| 53 | * |
---|
| 54 | * Must not use libc (to do io) from here, since drivers are not yet |
---|
| 55 | * initialized. |
---|
| 56 | * |
---|
| 57 | * Installed in the rtems_cpu_table defined in |
---|
| 58 | * rtems/c/src/exec/score/cpu/m68k/cpu.h in main() below. Called from |
---|
| 59 | * rtems_initialize_executive() defined in rtems/c/src/exec/sapi/src/init.c |
---|
| 60 | * |
---|
| 61 | * Input parameters: NONE |
---|
| 62 | * |
---|
| 63 | * Output parameters: NONE |
---|
| 64 | * |
---|
| 65 | * Return values: NONE |
---|
| 66 | */ |
---|
| 67 | void bsp_pretasking_hook(void) |
---|
| 68 | { |
---|
| 69 | /* |
---|
| 70 | * These are assigned addresses in the linkcmds file for the BSP. This |
---|
| 71 | * approach is better than having these defined as manifest constants and |
---|
| 72 | * compiled into the kernel, but it is still not ideal when dealing with |
---|
| 73 | * multiprocessor configuration in which each board as a different memory |
---|
| 74 | * map. A better place for defining these symbols might be the makefiles. |
---|
| 75 | * Consideration should also be given to developing an approach in which |
---|
| 76 | * the kernel and the application can be linked and burned into ROM |
---|
| 77 | * independently of each other. |
---|
| 78 | */ |
---|
| 79 | extern unsigned char _HeapStart; |
---|
| 80 | extern unsigned char _HeapEnd; |
---|
| 81 | |
---|
| 82 | bsp_libc_init( &_HeapStart, &_HeapEnd - &_HeapStart, 0 ); |
---|
| 83 | |
---|
| 84 | #ifdef RTEMS_DEBUG |
---|
| 85 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
---|
| 86 | #endif |
---|
| 87 | } |
---|
| 88 | |
---|
| 89 | |
---|
| 90 | /* |
---|
| 91 | * bsp_start() |
---|
| 92 | * |
---|
| 93 | * Board-specific initialization code. Called from the generic boot_card() |
---|
| 94 | * function defined in rtems/c/src/lib/libbsp/shared/main.c. That function |
---|
| 95 | * does some of the board independent initialization. It is called from the |
---|
| 96 | * MBX8xx entry point _start() defined in |
---|
| 97 | * rtems/c/src/lib/libbsp/powerpc/mbx8xx/startup/start.S |
---|
| 98 | * |
---|
| 99 | * _start() has set up a stack, has zeroed the .bss section, has turned off |
---|
| 100 | * interrupts, and placed the processor in the supervisor mode. boot_card() |
---|
| 101 | * has left the processor in that state when bsp_start() was called. |
---|
| 102 | * |
---|
| 103 | * RUNS WITH ADDRESS TRANSLATION AND CACHING TURNED OFF! |
---|
| 104 | * ASSUMES THAT THE VIRTUAL ADDRESSES WILL BE IDENTICAL TO THE PHYSICAL |
---|
| 105 | * ADDRESSES. Software-controlled address translation would be required |
---|
| 106 | * otherwise. |
---|
| 107 | * |
---|
| 108 | * Input parameters: NONE |
---|
| 109 | * |
---|
| 110 | * Output parameters: NONE |
---|
| 111 | * |
---|
| 112 | * Return values: NONE |
---|
| 113 | */ |
---|
| 114 | void bsp_start(void) |
---|
| 115 | { |
---|
| 116 | extern void *_WorkspaceBase; |
---|
| 117 | unsigned32 r1; |
---|
| 118 | |
---|
| 119 | mmu_init(); |
---|
| 120 | |
---|
| 121 | /* |
---|
| 122 | * Enable instruction and data caches. Do not force writethrough mode. |
---|
| 123 | */ |
---|
| 124 | #ifdef INSTRUCTION_CACHE_ENABLE |
---|
| 125 | r1 = M8xx_CACHE_CMD_ENABLE; |
---|
| 126 | _mtspr( M8xx_IC_CST, r1 ); |
---|
| 127 | _isync; |
---|
| 128 | #endif |
---|
| 129 | |
---|
| 130 | /* |
---|
| 131 | * Warning: EPPCBug 1.1 chokes to death if the data cache is turned on. |
---|
| 132 | * Set DATA_CACHE_ENABLE to zero in mbx8xx.cfg if EPPCBUG is used. |
---|
| 133 | */ |
---|
| 134 | #ifdef DATA_CACHE_ENABLE |
---|
| 135 | r1 = M8xx_CACHE_CMD_ENABLE; |
---|
| 136 | _mtspr( M8xx_DC_CST, r1 ); |
---|
| 137 | _isync; |
---|
| 138 | #endif |
---|
| 139 | |
---|
| 140 | /* |
---|
| 141 | * Allocate the memory for the RTEMS Work Space. This can come from |
---|
| 142 | * a variety of places: hard coded address, malloc'ed from outside |
---|
| 143 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
---|
| 144 | * typically done by stock BSPs) by subtracting the required amount |
---|
| 145 | * of work space from the last physical address on the CPU board. |
---|
| 146 | * |
---|
| 147 | * In this case, the memory is not malloc'ed. It is just |
---|
| 148 | * "pulled from the air". |
---|
| 149 | */ |
---|
| 150 | BSP_Configuration.work_space_start = (void *)&_WorkspaceBase; |
---|
| 151 | |
---|
| 152 | /* |
---|
| 153 | * initialize the CPU table for this BSP |
---|
| 154 | */ |
---|
| 155 | |
---|
| 156 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
---|
| 157 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
---|
| 158 | if( Cpu_table.interrupt_stack_size < 4 * 1024 ) |
---|
| 159 | Cpu_table.interrupt_stack_size = 4 * 1024; |
---|
| 160 | |
---|
| 161 | Cpu_table.clicks_per_usec = 1; /* for 4MHz extclk */ |
---|
| 162 | Cpu_table.serial_per_sec = 10000000; |
---|
| 163 | Cpu_table.serial_external_clock = 1; |
---|
| 164 | Cpu_table.serial_xon_xoff = 0; |
---|
| 165 | Cpu_table.serial_cts_rts = 1; |
---|
| 166 | Cpu_table.serial_rate = 9600; |
---|
| 167 | #if ( defined(mbx821_001) || defined(mbx821_001b) || defined(mbx860_001b) ) |
---|
| 168 | Cpu_table.clock_speed = 50000000; |
---|
| 169 | Cpu_table.timer_average_overhead = 3; |
---|
| 170 | Cpu_table.timer_least_valid = 3; |
---|
| 171 | #else |
---|
| 172 | Cpu_table.clock_speed = 40000000; |
---|
| 173 | Cpu_table.timer_average_overhead = 3; |
---|
| 174 | Cpu_table.timer_least_valid = 3; |
---|
| 175 | #endif |
---|
| 176 | |
---|
| 177 | /* |
---|
| 178 | * Call this in case we use TERMIOS for console I/O |
---|
| 179 | */ |
---|
| 180 | m8xx_uart_reserve_resources( &BSP_Configuration ); |
---|
| 181 | |
---|
| 182 | m8xx.scc2.sccm=0; |
---|
| 183 | m8xx.scc2p.rbase=0; |
---|
| 184 | m8xx.scc2p.tbase=0; |
---|
| 185 | m8xx_cp_execute_cmd( M8xx_CR_OP_STOP_TX | M8xx_CR_CHAN_SCC2 ); |
---|
| 186 | } |
---|
| 187 | |
---|