[16a8616] | 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 | * Modifications for Virtex4 by Richard Claus <claus@slac.stanford.edu> |
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| 56 | */ |
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| 57 | |
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| 58 | #include <string.h> |
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| 59 | #include <fcntl.h> |
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| 60 | |
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| 61 | #include <bsp.h> |
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| 62 | #include <bsp/irq.h> |
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| 63 | #include <bsp/vectors.h> |
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| 64 | #include <rtems/bspIo.h> |
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| 65 | #include <rtems/libio.h> |
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| 66 | #include <rtems/libcsupport.h> |
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| 67 | #include <rtems/sptables.h> /* for RTEMS_VERSION */ |
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| 68 | #include <libcpu/cpuIdent.h> |
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| 69 | #include <libcpu/spr.h> |
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| 70 | |
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| 71 | #define DO_DOWN_ALIGN(x,a) ((x) & ~((a)-1)) |
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| 72 | |
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| 73 | #define DO_UP_ALIGN(x,a) DO_DOWN_ALIGN(((x) + (a) - 1 ),a) |
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| 74 | |
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| 75 | #define CPU_DOWN_ALIGN(x) DO_DOWN_ALIGN(x, CPU_ALIGNMENT) |
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| 76 | #define CPU_UP_ALIGN(x) DO_UP_ALIGN(x, CPU_ALIGNMENT) |
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| 77 | |
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| 78 | |
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| 79 | /* Expected by clock.c */ |
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| 80 | uint32_t bsp_clicks_per_usec; |
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| 81 | bool bsp_timer_internal_clock; /* true, when timer runs with CPU clk */ |
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| 82 | uint32_t bsp_timer_least_valid; |
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| 83 | uint32_t bsp_timer_average_overhead; |
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| 84 | |
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| 85 | |
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| 86 | /* Defined in linkcmds linker script */ |
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| 87 | LINKER_SYMBOL(RamBase); |
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| 88 | LINKER_SYMBOL(RamSize); |
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| 89 | LINKER_SYMBOL(__bsp_ram_start); |
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| 90 | LINKER_SYMBOL(__bsp_ram_end); |
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| 91 | LINKER_SYMBOL(__rtems_end); |
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| 92 | LINKER_SYMBOL(_stack); |
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| 93 | LINKER_SYMBOL(StackSize); |
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| 94 | LINKER_SYMBOL(__stack_base); |
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| 95 | LINKER_SYMBOL(WorkAreaBase); |
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| 96 | LINKER_SYMBOL(MsgAreaBase); |
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| 97 | LINKER_SYMBOL(MsgAreaSize); |
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| 98 | LINKER_SYMBOL(__phy_ram_end); |
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| 99 | |
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| 100 | |
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| 101 | /* |
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| 102 | * Provide weak aliases so that RTEMS distribution builds |
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| 103 | */ |
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| 104 | static void _noopfun(void) {} |
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| 105 | static void _bsp_start(void) |
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| 106 | { |
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| 107 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 108 | uintptr_t intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); |
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| 109 | uintptr_t intrStackSize = rtems_configuration_get_interrupt_stack_size(); |
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| 110 | |
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| 111 | /* |
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| 112 | * Initialize default raw exception handlers. |
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| 113 | * |
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| 114 | * This BSP does not assume anything about firmware possibly loaded in the |
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| 115 | * FPGA, so the external interrupt should not be enabled in order to avoid |
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| 116 | * spurious interrupts. |
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| 117 | */ |
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| 118 | sc = ppc_exc_initialize(PPC_INTERRUPT_DISABLE_MASK_DEFAULT & ~MSR_EE, |
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| 119 | intrStackStart, |
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| 120 | intrStackSize); |
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| 121 | if (sc != RTEMS_SUCCESSFUL) BSP_panic("Cannot initialize exceptions"); |
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| 122 | |
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| 123 | /* Install our own set of exception vectors */ |
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| 124 | BSP_rtems_irq_mngt_init(0); |
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| 125 | } |
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| 126 | |
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| 127 | |
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| 128 | void app_bsp_start(void) |
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| 129 | __attribute__(( weak, alias("_bsp_start") )); |
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| 130 | |
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| 131 | void app_bsp_pretasking_hook(void) |
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| 132 | __attribute__(( weak, alias("_noopfun") )); |
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| 133 | |
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| 134 | void app_bsp_predriver_hook(void) |
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| 135 | __attribute__(( weak, alias("_noopfun") )); |
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| 136 | |
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| 137 | |
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| 138 | static char* bspMsgBuffer = (char*)MsgAreaBase; |
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| 139 | |
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| 140 | static void __bsp_outchar_to_memory(char c) |
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| 141 | { |
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| 142 | static char* msgBuffer = (char*)MsgAreaBase; |
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| 143 | *msgBuffer++ = c; |
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| 144 | if (msgBuffer >= &bspMsgBuffer[(int)MsgAreaSize]) msgBuffer = bspMsgBuffer; |
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| 145 | *msgBuffer = 0x00; /* Overwrite next location to show EOM */ |
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| 146 | } |
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| 147 | |
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| 148 | |
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| 149 | void BSP_ask_for_reset(void) |
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| 150 | { |
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| 151 | printk("\nSystem stopped, issue RESET"); |
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| 152 | for(;;); |
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| 153 | } |
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| 154 | |
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| 155 | |
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| 156 | void BSP_panic(char *s) |
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| 157 | { |
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| 158 | printk("\n%s PANIC %s\n", _RTEMS_version, s); |
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| 159 | BSP_ask_for_reset(); |
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| 160 | } |
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| 161 | |
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| 162 | |
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| 163 | void _BSP_Fatal_error(unsigned int v) |
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| 164 | { |
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| 165 | printk("\n%s FATAL ERROR %x\n", _RTEMS_version, v); |
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| 166 | BSP_ask_for_reset(); |
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| 167 | } |
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| 168 | |
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| 169 | |
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| 170 | /*===================================================================*/ |
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| 171 | |
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| 172 | /* |
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| 173 | * BSP start routine. Called by boot_card(). |
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| 174 | * |
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| 175 | * This routine does the bulk of the system initialization. |
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| 176 | */ |
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| 177 | void bsp_start(void) |
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| 178 | { |
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| 179 | uintptr_t intrStackStart; |
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| 180 | uintptr_t intrStackSize; |
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| 181 | ppc_cpu_id_t myCpu; |
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| 182 | ppc_cpu_revision_t myCpuRevision; |
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| 183 | |
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| 184 | /* Set the character output function; The application may override this */ |
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| 185 | BSP_output_char = __bsp_outchar_to_memory; |
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| 186 | |
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| 187 | printk("\nWelcome to RTEMS %s\n", _RTEMS_version ); |
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| 188 | |
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| 189 | /* |
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| 190 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() |
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| 191 | * function stores the result in global variables so that it can be used later... |
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| 192 | */ |
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| 193 | myCpu = get_ppc_cpu_type(); |
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| 194 | myCpuRevision = get_ppc_cpu_revision(); |
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| 195 | printk("CPU: 0x%04x, Revision: 0x%04x = %d, Name: %s\n", |
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| 196 | myCpu, myCpuRevision, myCpuRevision, get_ppc_cpu_type_name(myCpu)); |
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| 197 | |
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| 198 | /* |
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| 199 | * Initialize the device driver parameters |
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| 200 | */ |
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| 201 | |
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| 202 | /* Timebase register ticks/microsecond; The application may override these */ |
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| 203 | bsp_clicks_per_usec = 350; |
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| 204 | bsp_timer_internal_clock = true; |
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| 205 | bsp_timer_average_overhead = 2; |
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| 206 | bsp_timer_least_valid = 3; |
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| 207 | |
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| 208 | /* |
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| 209 | * Initialize the interrupt related settings. |
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| 210 | */ |
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| 211 | intrStackStart = CPU_UP_ALIGN((uint32_t)__bsp_ram_start); |
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| 212 | intrStackSize = rtems_configuration_get_interrupt_stack_size(); |
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| 213 | printk(" Base/Start End Size\n" |
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| 214 | "RAM: 0x%08x 0x%x\n" |
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| 215 | "RTEMS: 0x%08x\n" |
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| 216 | "Interrupt Stack: 0x%08x 0x%x\n" |
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| 217 | "Stack: 0x%08x 0x%08x 0x%x\n" |
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| 218 | "Workspace: 0x%08x 0x%08x\n" |
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| 219 | "MsgArea: 0x%08x 0x%x\n" |
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| 220 | "Physical RAM 0x%08x\n", |
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| 221 | (uint32_t)RamBase, (uint32_t)RamSize, |
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| 222 | (uint32_t)__rtems_end, |
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| 223 | intrStackStart, intrStackSize, |
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| 224 | (uint32_t)__stack_base, (uint32_t)_stack, (uint32_t)StackSize, |
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| 225 | (uint32_t)WorkAreaBase, (uint32_t)__bsp_ram_end, |
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| 226 | (uint32_t)MsgAreaBase, (uint32_t)MsgAreaSize, |
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| 227 | (uint32_t)__phy_ram_end); |
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| 228 | |
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| 229 | /* Continue with application-specific initialization */ |
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| 230 | app_bsp_start(); |
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| 231 | } |
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| 232 | |
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| 233 | |
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| 234 | /* |
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| 235 | * BSP pretasking hook. Called just before drivers are initialized. |
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| 236 | * Used to setup libc and install any BSP extensions. |
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| 237 | * |
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| 238 | * Must not use libc (to do io) from here, since drivers are not yet |
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| 239 | * initialized. |
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| 240 | */ |
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| 241 | |
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| 242 | void bsp_pretasking_hook(void) |
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| 243 | { |
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| 244 | app_bsp_pretasking_hook(); |
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| 245 | } |
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| 246 | |
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| 247 | |
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| 248 | /* |
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| 249 | * BSP predriver hook. Called by boot_card() just before drivers are |
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| 250 | * initialized. Clear out any stale interrupts here. |
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| 251 | */ |
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| 252 | void bsp_predriver_hook(void) |
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| 253 | { |
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| 254 | app_bsp_predriver_hook(); |
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| 255 | } |
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