[862c2317] | 1 | /* bsp_start() |
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| 2 | * |
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| 3 | * This routine 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 this routine is invoked. |
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| 7 | * |
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| 8 | * INPUT: NONE |
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| 9 | * |
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| 10 | * OUTPUT: NONE |
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| 11 | * |
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| 12 | * Author: Thomas Doerfler <td@imd.m.isar.de> |
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| 13 | * IMD Ingenieurbuero fuer Microcomputertechnik |
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| 14 | * |
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| 15 | * COPYRIGHT (c) 1998 by IMD |
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| 16 | * |
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| 17 | * Changes from IMD are covered by the original distributions terms. |
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| 18 | * This file has been derived from the papyrus BSP: |
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| 19 | * |
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| 20 | * Author: Andrew Bray <andy@i-cubed.co.uk> |
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| 21 | * |
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| 22 | * COPYRIGHT (c) 1995 by i-cubed ltd. |
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| 23 | * |
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| 24 | * To anyone who acknowledges that this file is provided "AS IS" |
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| 25 | * without any express or implied warranty: |
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| 26 | * permission to use, copy, modify, and distribute this file |
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| 27 | * for any purpose is hereby granted without fee, provided that |
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| 28 | * the above copyright notice and this notice appears in all |
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| 29 | * copies, and that the name of i-cubed limited not be used in |
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| 30 | * advertising or publicity pertaining to distribution of the |
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| 31 | * software without specific, written prior permission. |
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| 32 | * i-cubed limited makes no representations about the suitability |
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| 33 | * of this software for any purpose. |
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| 34 | * |
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| 35 | * Modifications for spooling console driver and control of memory layout |
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| 36 | * with linker command file by |
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| 37 | * Thomas Doerfler <td@imd.m.isar.de> |
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| 38 | * for these modifications: |
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| 39 | * COPYRIGHT (c) 1997 by IMD, Puchheim, Germany. |
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| 40 | * |
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| 41 | * To anyone who acknowledges that this file is provided "AS IS" |
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| 42 | * without any express or implied warranty: |
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| 43 | * permission to use, copy, modify, and distribute this file |
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| 44 | * for any purpose is hereby granted without fee, provided that |
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| 45 | * the above copyright notice and this notice appears in all |
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| 46 | * copies. IMD makes no representations about the suitability |
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| 47 | * of this software for any purpose. |
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| 48 | * |
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| 49 | * Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c: |
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| 50 | * |
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| 51 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 52 | * On-Line Applications Research Corporation (OAR). |
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| 53 | * |
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| 54 | * Modifications for PPC405GP by Dennis Ehlin |
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| 55 | * |
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| 56 | * $Id$ |
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| 57 | */ |
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[a86f3aac] | 58 | |
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[862c2317] | 59 | #include <string.h> |
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| 60 | #include <fcntl.h> |
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| 61 | |
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| 62 | #include <bsp.h> |
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| 63 | #include <rtems/libio.h> |
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| 64 | #include <rtems/libcsupport.h> |
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| 65 | #include <bsp/irq.h> |
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| 66 | #include <rtems/bspIo.h> |
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| 67 | #include <libcpu/cpuIdent.h> |
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| 68 | #include <libcpu/spr.h> |
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| 69 | #include <rtems/powerpc/powerpc.h> |
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| 70 | |
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| 71 | #include RTEMS_XPARAMETERS_H |
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| 72 | #include <stdio.h> |
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| 73 | |
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| 74 | uint32_t _heap_start; |
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| 75 | uint32_t _heap_end; |
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| 76 | uint32_t _top_of_ram; |
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| 77 | |
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[07e9642c] | 78 | /* |
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| 79 | * Driver configuration parameters |
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| 80 | */ |
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| 81 | uint32_t bsp_clicks_per_usec; |
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| 82 | uint32_t bsp_serial_per_sec; /* Serial clocks per second */ |
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| 83 | boolean bsp_serial_external_clock; |
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| 84 | boolean bsp_serial_xon_xoff; |
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| 85 | boolean bsp_serial_cts_rts; |
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| 86 | uint32_t bsp_serial_rate; |
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| 87 | uint32_t bsp_timer_average_overhead; /* Average overhead of timer in ticks */ |
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| 88 | uint32_t bsp_timer_least_valid; /* Least valid number from timer */ |
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| 89 | boolean bsp_timer_internal_clock; /* TRUE, when timer runs with CPU clk */ |
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| 90 | |
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[862c2317] | 91 | |
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| 92 | /* Initialize whatever libc we are using |
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| 93 | * called from postdriver hook |
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| 94 | */ |
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| 95 | |
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| 96 | void bsp_XAssertHandler(const char* file, int line); |
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| 97 | void bsp_libc_init( void *, uint32_t, int ); |
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| 98 | |
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| 99 | |
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| 100 | void bsp_XAssertHandler(const char* file, int line) { |
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| 101 | printf("\n***\n*** XAssert Failed! File: %s, Line: %d\n***\n", file, line); |
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| 102 | } |
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| 103 | |
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| 104 | /* |
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| 105 | * Function: bsp_pretasking_hook |
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| 106 | * Created: 95/03/10 |
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| 107 | * |
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| 108 | * Description: |
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| 109 | * BSP pretasking hook. Called just before drivers are initialized. |
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| 110 | * Used to setup libc and install any BSP extensions. |
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| 111 | * |
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| 112 | * NOTES: |
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| 113 | * Must not use libc (to do io) from here, since drivers are |
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| 114 | * not yet initialized. |
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| 115 | * |
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| 116 | */ |
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| 117 | |
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| 118 | void bsp_pretasking_hook(void) |
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| 119 | { |
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| 120 | |
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| 121 | |
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| 122 | uint32_t heap_start; |
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| 123 | uint32_t heap_size; |
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| 124 | uint32_t heap_end; |
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| 125 | |
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| 126 | /* round up from the top of workspace to next 64k boundary, get |
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| 127 | * default heapsize from linker script */ |
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[d11d1d2a] | 128 | heap_start = (((uint32_t)Configuration.work_space_start + |
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| 129 | rtems_configuration_get_work_space_size()) + 0x18000) & 0xffff0000; |
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[862c2317] | 130 | |
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| 131 | heap_end = _heap_start + (uint32_t)&_HeapSize; |
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| 132 | |
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| 133 | heap_size = (heap_end - heap_start); |
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| 134 | |
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| 135 | _heap_start = heap_start; |
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| 136 | _heap_end = heap_end; |
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| 137 | |
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| 138 | _top_of_ram = heap_end; |
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| 139 | |
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| 140 | bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */ |
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| 141 | |
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| 142 | } |
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| 143 | |
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| 144 | /* |
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| 145 | * bsp_start |
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| 146 | * |
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| 147 | * This routine does the bulk of the system initialization. |
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| 148 | */ |
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| 149 | |
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| 150 | |
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| 151 | void bsp_start( void ) |
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| 152 | { |
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[336495b9] | 153 | extern unsigned char IntrStack_start[]; |
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| 154 | extern unsigned char IntrStack_end[]; |
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[862c2317] | 155 | ppc_cpu_id_t myCpu; |
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| 156 | ppc_cpu_revision_t myCpuRevision; |
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| 157 | |
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| 158 | /* |
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| 159 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() |
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| 160 | * function store the result in global variables |
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| 161 | * so that it can be used latter... |
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| 162 | */ |
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| 163 | myCpu = get_ppc_cpu_type(); |
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| 164 | myCpuRevision = get_ppc_cpu_revision(); |
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[d34d8692] | 165 | |
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[862c2317] | 166 | /* |
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[d34d8692] | 167 | * initialize the device driver parameters |
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[862c2317] | 168 | */ |
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| 169 | |
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| 170 | /* timebase register ticks/microsecond */ |
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[07e9642c] | 171 | bsp_clicks_per_usec = (250000000 / 1000000); |
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| 172 | bsp_serial_per_sec = 14625000; |
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| 173 | bsp_serial_external_clock = 0; |
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| 174 | bsp_timer_internal_clock = 1; |
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| 175 | bsp_serial_xon_xoff = 0; |
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| 176 | bsp_serial_cts_rts = 0; |
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| 177 | bsp_serial_rate = 115200; |
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| 178 | bsp_timer_average_overhead = 2; |
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| 179 | bsp_timer_least_valid = 3; |
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[862c2317] | 180 | |
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| 181 | /* |
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| 182 | * Initialize default raw exception handlers. |
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| 183 | */ |
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[336495b9] | 184 | ppc_exc_initialize( |
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| 185 | PPC_INTERRUPT_DISABLE_MASK_DEFAULT | MSR_CE, |
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| 186 | (uint32_t)IntrStack_start, |
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| 187 | IntrStack_end - IntrStack_start |
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| 188 | ); |
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[862c2317] | 189 | |
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| 190 | /* |
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| 191 | * Install our own set of exception vectors |
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| 192 | */ |
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| 193 | BSP_rtems_irq_mng_init(0); |
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| 194 | |
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| 195 | /* |
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| 196 | * Allocate the memory for the RTEMS Work Space. This can come from |
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| 197 | * a variety of places: hard coded address, malloc'ed from outside |
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| 198 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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| 199 | * typically done by stock BSPs) by subtracting the required amount |
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| 200 | * of work space from the last physical address on the CPU board. |
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| 201 | */ |
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| 202 | |
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| 203 | /* |
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| 204 | * Need to "allocate" the memory for the RTEMS Workspace and |
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| 205 | * tell the RTEMS configuration where it is. This memory is |
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| 206 | * not malloc'ed. It is just "pulled from the air". |
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| 207 | */ |
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| 208 | /* FIME: plan usage of RAM better: |
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| 209 | - make top of ram dynamic, |
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| 210 | - make rest of ram to heap... |
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| 211 | -remove RAM_END from bsp.h, this cannot be valid... |
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| 212 | or must be a function call |
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| 213 | */ |
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| 214 | { |
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| 215 | extern int _end; |
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| 216 | |
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| 217 | /* round _end up to next 64k boundary for start of workspace */ |
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[336495b9] | 218 | Configuration.work_space_start = (void *)((((uint32_t)&_end) + 0xffff) & 0xffff0000); |
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[862c2317] | 219 | } |
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| 220 | |
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| 221 | } |
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| 222 | |
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| 223 | void BSP_ask_for_reset(void) |
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| 224 | { |
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| 225 | printk("system stopped, press RESET"); |
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| 226 | while(1) {}; |
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| 227 | } |
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| 228 | |
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| 229 | void BSP_panic(char *s) |
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| 230 | { |
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| 231 | printk("%s PANIC %s\n",_RTEMS_version, s); |
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| 232 | BSP_ask_for_reset(); |
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| 233 | } |
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| 234 | |
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| 235 | void _BSP_Fatal_error(unsigned int v) |
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| 236 | { |
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| 237 | printk("%s PANIC ERROR %x\n",_RTEMS_version, v); |
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| 238 | BSP_ask_for_reset(); |
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| 239 | } |
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| 240 | |
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