[8961188] | 1 | /* bspstart.c |
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| 2 | * |
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| 3 | * This set of routines starts the application. It includes application, |
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| 4 | * board, and monitor specific initialization and configuration. |
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| 5 | * The generic CPU dependent initialization has been performed |
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| 6 | * before any of these are invoked. |
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| 7 | * |
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| 8 | * Called by RTEMS::RTEMS constructor in rtems-ctor.cc |
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| 9 | * |
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| 10 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994, 1997. |
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| 11 | * On-Line Applications Research Corporation (OAR). |
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| 12 | * All rights assigned to U.S. Government, 1994. |
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| 13 | * |
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| 14 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 15 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 16 | * notice must appear in all copies of this file and its derivatives. |
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| 17 | * |
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| 18 | * $Id$ |
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| 19 | */ |
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| 20 | |
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| 21 | #include <bsp.h> |
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| 22 | #include <rtems/libio.h> |
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| 23 | |
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| 24 | #include <libcsupport.h> |
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| 25 | |
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| 26 | #include <string.h> |
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| 27 | #include <fcntl.h> |
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| 28 | |
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| 29 | #ifdef STACK_CHECKER_ON |
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| 30 | #include <stackchk.h> |
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| 31 | #endif |
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| 32 | |
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| 33 | /* |
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| 34 | * The original table from the application and our copy of it with |
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| 35 | * some changes. |
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| 36 | */ |
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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; |
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| 42 | rtems_unsigned32 bsp_isr_level; |
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| 43 | |
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| 44 | /* |
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| 45 | * Tells us where to put the workspace in case remote debugger is present. |
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| 46 | */ |
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| 47 | |
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| 48 | #if 0 |
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| 49 | extern rtems_unsigned32 rdb_start; |
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| 50 | #endif |
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| 51 | |
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| 52 | /* |
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| 53 | * Amount to increment itimer by each pass |
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| 54 | * It is a variable instead of a #define to allow the 'looptest' |
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| 55 | * script to bump it without recompiling rtems |
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| 56 | * |
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| 57 | * NOTE: This is based on the PA-RISC simulator. I don't know if we |
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| 58 | * can actually pull this trick on the PPC simulator. |
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| 59 | */ |
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| 60 | |
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| 61 | rtems_unsigned32 CPU_PPC_CLICKS_PER_TICK; |
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| 62 | |
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| 63 | #if PSIM_FAST_IDLE |
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| 64 | |
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| 65 | /* |
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| 66 | * Many of the tests are very slow on the simulator because they have |
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| 67 | * have 5 second delays hardwired in. |
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| 68 | * |
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| 69 | * Try to speed those tests up by speeding up the clock when in the idle task. |
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| 70 | * |
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| 71 | * NOTE: At the current setting, 5 second delays in the tests take |
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| 72 | * approximately 5 seconds of wall time. |
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| 73 | */ |
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| 74 | |
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| 75 | rtems_extension |
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| 76 | fast_idle_switch_hook(rtems_tcb *current_task, |
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| 77 | rtems_tcb *heir_task) |
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| 78 | { |
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| 79 | static rtems_unsigned32 normal_clock = ~0; |
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| 80 | static rtems_unsigned32 fast_clock; |
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| 81 | |
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| 82 | /* init our params on first call */ |
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| 83 | if (normal_clock == (rtems_unsigned32) ~0) |
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| 84 | { |
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| 85 | normal_clock = CPU_PPC_CLICKS_PER_TICK; |
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| 86 | fast_clock = 10000; |
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| 87 | #if 0 |
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| 88 | fast_clock = CPU_PPC_CLICKS_PER_TICK / 0x10 ; |
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| 89 | #endif |
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| 90 | if (fast_clock == 0) /* handle pathological case */ |
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| 91 | fast_clock++; |
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| 92 | } |
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| 93 | |
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| 94 | /* |
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| 95 | * Run the clock faster when idle is in place. |
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| 96 | */ |
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| 97 | |
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| 98 | if (heir_task == _Thread_Idle) |
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| 99 | CPU_PPC_CLICKS_PER_TICK = fast_clock; |
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| 100 | else if (current_task == _Thread_Idle) |
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| 101 | CPU_PPC_CLICKS_PER_TICK = normal_clock; |
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| 102 | } |
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| 103 | |
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| 104 | #endif |
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| 105 | |
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| 106 | /* |
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| 107 | * bsp_libc_init |
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| 108 | * |
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| 109 | * Initialize whatever libc we are using called from bsp_postdriver_hook. |
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| 110 | */ |
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| 111 | |
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| 112 | void bsp_libc_init(void) |
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| 113 | { |
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| 114 | extern int end; |
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| 115 | rtems_unsigned32 heap_start; |
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| 116 | rtems_unsigned32 heap_size; |
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| 117 | |
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| 118 | heap_start = (rtems_unsigned32) &end; |
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| 119 | if (heap_start & (CPU_ALIGNMENT-1)) |
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| 120 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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| 121 | |
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| 122 | heap_size = BSP_Configuration.work_space_start - (void *)&end; |
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| 123 | heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ |
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| 124 | |
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| 125 | RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 0); |
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| 126 | |
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| 127 | /* |
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| 128 | * Init the RTEMS libio facility to provide UNIX-like system |
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| 129 | * calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc) |
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| 130 | * Uses malloc() to get area for the iops, so must be after malloc init |
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| 131 | */ |
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| 132 | |
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| 133 | rtems_libio_init(); |
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| 134 | |
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| 135 | /* |
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| 136 | * Set up for the libc handling. |
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| 137 | */ |
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| 138 | |
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| 139 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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| 140 | libc_init(1); /* reentrant if possible */ |
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| 141 | else |
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| 142 | libc_init(0); /* non-reentrant */ |
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| 143 | |
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| 144 | } |
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| 145 | |
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| 146 | |
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| 147 | /* |
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| 148 | * bsp_pretasking_hook |
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| 149 | * |
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| 150 | * BSP pretasking hook. Called just before drivers are initialized. |
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| 151 | * Used to setup libc and install any BSP extensions. |
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| 152 | */ |
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| 153 | |
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| 154 | void bsp_pretasking_hook(void) |
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| 155 | { |
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| 156 | bsp_libc_init(); |
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| 157 | |
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| 158 | #if PSIM_FAST_IDLE |
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| 159 | /* |
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| 160 | * Install the fast idle task switch extension |
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| 161 | * |
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| 162 | * On MP systems, might not want to do this; it confuses at least |
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| 163 | * one test (mp06) on the PA-RISC simulator |
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| 164 | */ |
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| 165 | |
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| 166 | #if 0 |
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| 167 | if (BSP_Configuration.User_multiprocessing_table == 0) |
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| 168 | #endif |
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| 169 | { |
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| 170 | rtems_extensions_table fast_idle_extension; |
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| 171 | rtems_id extension_id; |
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| 172 | rtems_status_code rc; |
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| 173 | |
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| 174 | memset(&fast_idle_extension, 0, sizeof(fast_idle_extension)); |
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| 175 | |
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| 176 | fast_idle_extension.thread_switch = fast_idle_switch_hook; |
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| 177 | |
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| 178 | rc = rtems_extension_create( |
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| 179 | rtems_build_name('F', 'D', 'L', 'E'), |
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| 180 | &fast_idle_extension, |
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| 181 | &extension_id |
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| 182 | ); |
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| 183 | if (rc != RTEMS_SUCCESSFUL) |
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| 184 | rtems_fatal_error_occurred(rc); |
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| 185 | } |
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| 186 | #endif |
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| 187 | |
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| 188 | |
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| 189 | #ifdef STACK_CHECKER_ON |
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| 190 | /* |
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| 191 | * Initialize the stack bounds checker |
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| 192 | * We can either turn it on here or from the app. |
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| 193 | */ |
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| 194 | |
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| 195 | Stack_check_Initialize(); |
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| 196 | #endif |
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| 197 | |
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| 198 | #ifdef RTEMS_DEBUG |
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| 199 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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| 200 | #endif |
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| 201 | |
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| 202 | } |
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| 203 | |
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| 204 | /* |
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| 205 | * Use the shared bsp_postdriver_hook() implementation |
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| 206 | */ |
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| 207 | |
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| 208 | void bsp_postdriver_hook(void); |
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| 209 | |
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| 210 | /* |
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| 211 | * bsp_start |
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| 212 | * |
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| 213 | * This routine does the bulk of the system initialization. |
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| 214 | */ |
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| 215 | |
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| 216 | void bsp_start( void ) |
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| 217 | { |
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| 218 | unsigned char *work_space_start; |
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| 219 | |
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| 220 | #if 0 |
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| 221 | /* |
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| 222 | * Set MSR to show vectors at 0 XXX |
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| 223 | */ |
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| 224 | _CPU_MSR_Value( msr_value ); |
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| 225 | msr_value &= ~PPC_MSR_EP; |
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| 226 | _CPU_MSR_SET( msr_value ); |
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| 227 | #endif |
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| 228 | |
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| 229 | /* |
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| 230 | * Set up our hooks |
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| 231 | * Make sure libc_init is done before drivers initialized so that |
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| 232 | * they can use atexit() |
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| 233 | */ |
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| 234 | |
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| 235 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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| 236 | |
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| 237 | Cpu_table.predriver_hook = NULL; /* bsp_spurious_initialize;*/ |
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| 238 | |
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| 239 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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| 240 | |
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| 241 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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| 242 | |
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| 243 | /* |
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| 244 | * PSIM does zero out memory BUT only when IT begins execution. Thus |
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| 245 | * if we want to have a clean slate in the workspace each time we |
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| 246 | * begin execution of OUR application, then we must zero the workspace. |
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| 247 | */ |
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| 248 | |
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| 249 | Cpu_table.do_zero_of_workspace = FALSE; |
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| 250 | |
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| 251 | /* |
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| 252 | * This should be enough interrupt stack. |
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| 253 | */ |
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| 254 | |
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| 255 | Cpu_table.interrupt_stack_size = (12 * 1024); |
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| 256 | |
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| 257 | /* |
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| 258 | * SIS does not support MP configurations so there is really no way |
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| 259 | * to check this out. |
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| 260 | */ |
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| 261 | |
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| 262 | Cpu_table.extra_mpci_receive_server_stack = 0; |
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| 263 | |
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| 264 | /* |
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| 265 | * The monitor likes the exception table to be at 0x0. |
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| 266 | */ |
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| 267 | |
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| 268 | Cpu_table.exceptions_in_RAM = TRUE; |
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| 269 | |
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| 270 | /* |
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| 271 | * Copy the table and allocate memory for the RTEMS Workspace |
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| 272 | */ |
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| 273 | |
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| 274 | BSP_Configuration = Configuration; |
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| 275 | |
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| 276 | #if defined(RTEMS_POSIX_API) |
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| 277 | BSP_Configuration.work_space_size *= 3; |
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| 278 | #endif |
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| 279 | |
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| 280 | |
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| 281 | #if 0 |
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| 282 | work_space_start = |
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| 283 | (unsigned char *)rdb_start - BSP_Configuration.work_space_size; |
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| 284 | #endif |
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| 285 | |
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| 286 | work_space_start = |
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| 287 | (unsigned char *)&RAM_END - BSP_Configuration.work_space_size; |
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| 288 | |
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| 289 | if ( work_space_start <= (unsigned char *)&end ) { |
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| 290 | DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); |
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| 291 | bsp_cleanup(); |
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| 292 | } |
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| 293 | |
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| 294 | BSP_Configuration.work_space_start = work_space_start; |
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| 295 | |
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| 296 | #ifdef STACK_CHECKER_ON |
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| 297 | /* |
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| 298 | * Add 1 extension for stack checker |
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| 299 | */ |
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| 300 | |
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| 301 | BSP_Configuration.maximum_extensions++; |
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| 302 | #endif |
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| 303 | |
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| 304 | #if PSIM_FAST_IDLE |
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| 305 | /* |
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| 306 | * Add 1 extension for fast idle |
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| 307 | */ |
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| 308 | |
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| 309 | BSP_Configuration.maximum_extensions++; |
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| 310 | #endif |
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| 311 | |
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| 312 | /* |
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| 313 | * Set the "clicks per tick" for the simulator |
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| 314 | * used by XXX/clock/clock.c to schedule interrupts |
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| 315 | * |
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| 316 | * NOTE: On psim, each click of the decrementer register corresponds |
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| 317 | * to 1 instruction. By setting this to 100, we are indicating |
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| 318 | * that we are assuming it can execute 100 instructions per |
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| 319 | * microsecond. This corresponds to sustaining 1 instruction |
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| 320 | * per cycle at 100 Mhz. Whether this is a good guess or not |
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| 321 | * is anyone's guess. |
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| 322 | */ |
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| 323 | |
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| 324 | { |
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| 325 | extern int PSIM_INSTRUCTIONS_PER_MICROSECOND; |
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| 326 | |
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| 327 | CPU_PPC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick * |
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| 328 | (int) &PSIM_INSTRUCTIONS_PER_MICROSECOND; |
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| 329 | } |
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| 330 | |
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| 331 | /* |
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| 332 | * Initialize RTEMS. main() will finish it up and start multitasking. |
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| 333 | */ |
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| 334 | |
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| 335 | rtems_libio_config( &BSP_Configuration, BSP_LIBIO_MAX_FDS ); |
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| 336 | } |
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