Mercurial > ecos
annotate packages/hal/arm/arch/current/src/hal_misc.c @ 76:435cced73e2f ecos-v1_3_1-release
eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
| author | jlarmour |
|---|---|
| date | Tue, 28 Mar 2000 14:10:45 +0000 |
| parents | bf00f99aec69 |
| children | 95f3e12a6327 |
| rev | line source |
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| 2 | 1 /*========================================================================== |
| 2 // | |
| 3 // hal_misc.c | |
| 4 // | |
| 5 // HAL miscellaneous functions | |
| 6 // | |
| 7 //========================================================================== | |
| 8 //####COPYRIGHTBEGIN#### | |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Red Hat eCos Public License |
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12 // Version 1.1 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://www.redhat.com/ |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Configurable Operating System, |
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22 // released September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Red Hat. |
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25 // Portions created by Red Hat are |
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. |
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27 // All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
| 2 | 30 //####COPYRIGHTEND#### |
| 31 //========================================================================== | |
| 32 //#####DESCRIPTIONBEGIN#### | |
| 33 // | |
| 34 // Author(s): nickg, gthomas | |
| 35 // Contributors: nickg, gthomas | |
| 36 // Date: 1999-02-20 | |
| 37 // Purpose: HAL miscellaneous functions | |
| 38 // Description: This file contains miscellaneous functions provided by the | |
| 39 // HAL. | |
| 40 // | |
| 41 //####DESCRIPTIONEND#### | |
| 42 // | |
| 43 //=========================================================================*/ | |
| 44 | |
| 45 #include <pkgconf/hal.h> | |
| 46 #include <pkgconf/hal_arm.h> | |
| 47 #ifdef CYGPKG_KERNEL | |
| 48 #include <pkgconf/kernel.h> | |
| 49 #endif | |
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50 #ifdef CYGPKG_CYGMON |
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51 #include <pkgconf/cygmon.h> |
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52 #endif |
| 2 | 53 |
| 54 #include <cyg/infra/cyg_type.h> | |
| 55 #include <cyg/infra/cyg_trac.h> // tracing macros | |
| 56 #include <cyg/infra/cyg_ass.h> // assertion macros | |
| 57 | |
| 58 #include <cyg/hal/hal_arch.h> // HAL header | |
| 59 #include <cyg/hal/hal_intr.h> // HAL header | |
| 60 | |
| 61 externC void diag_printf(const char *fmt, ...); | |
| 62 | |
| 63 /*------------------------------------------------------------------------*/ | |
| 64 /* First level C exception handler. */ | |
| 65 | |
| 66 externC void __handle_exception (void); | |
| 67 | |
| 68 externC HAL_SavedRegisters *_hal_registers; | |
| 69 extern void *__mem_fault_handler; | |
| 70 | |
| 71 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS | |
| 72 /* Force exception handling into the GDB stubs. This is done by taking over | |
| 73 the exception vectors while executing in the stubs. This allows for the | |
| 74 debugged program to handle exceptions itself, except while the GDB | |
| 75 processing is underway. The only vector that can't be handled this way | |
| 76 is the illegal instruction vector which is used for breakpoint/single-step | |
| 77 and must be maintained by the stubs at all times. | |
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78 Note: the interrupt vectors are _not_ preempted as the stubs probably can't |
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79 handle them properly. |
| 2 | 80 */ |
| 81 | |
| 82 #define ARM_VECTORS 8 | |
| 83 extern unsigned long vectors[]; // exception vectors as defined by the stubs | |
| 84 static unsigned long *hardware_vectors = (unsigned long *)0x20; | |
| 85 static unsigned long hold_vectors[ARM_VECTORS]; | |
| 86 | |
| 87 static int exception_level; | |
| 88 | |
| 89 static void | |
| 90 __take_over_debug_traps(void) | |
| 91 { | |
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92 hold_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH]; |
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93 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH]; |
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94 hold_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA]; |
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95 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = vectors[CYGNUM_HAL_VECTOR_ABORT_DATA]; |
| 2 | 96 } |
| 97 | |
| 98 static void | |
| 99 __restore_debug_traps(void) | |
| 100 { | |
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101 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH] = hold_vectors[CYGNUM_HAL_VECTOR_ABORT_PREFETCH]; |
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102 hardware_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA] = hold_vectors[CYGNUM_HAL_VECTOR_ABORT_DATA]; |
| 2 | 103 } |
| 104 #endif | |
| 105 | |
| 106 void | |
| 107 exception_handler(HAL_SavedRegisters *regs) | |
| 108 { | |
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109 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && !defined(CYGPKG_CYGMON) |
| 2 | 110 if (__mem_fault_handler && |
| 111 regs->vector == CYGNUM_HAL_EXCEPTION_DATA_ACCESS) { | |
| 112 regs->pc = (unsigned long)__mem_fault_handler; | |
| 113 return; // Caught an exception inside stubs | |
| 114 } | |
| 115 | |
| 116 if (++exception_level == 1) __take_over_debug_traps(); | |
| 117 | |
| 118 _hal_registers = regs; | |
| 119 __handle_exception(); | |
| 120 | |
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121 if (--exception_level == 0) __restore_debug_traps(); |
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122 |
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123 #elif defined(CYGPKG_KERNEL_EXCEPTIONS) |
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124 |
| 2 | 125 // We should decode the vector and pass a more appropriate |
| 126 // value as the second argument. For now we simply pass a | |
| 127 // pointer to the saved registers. We should also divert | |
| 128 // breakpoint and other debug vectors into the debug stubs. | |
| 129 | |
| 130 cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs ); | |
| 131 | |
| 132 #else | |
| 133 | |
| 134 CYG_FAIL("Exception!!!"); | |
| 135 | |
| 136 #endif | |
| 137 | |
| 138 return; | |
| 139 } | |
| 140 | |
| 141 /*------------------------------------------------------------------------*/ | |
| 142 /* C++ support - run initial constructors */ | |
| 143 | |
| 144 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG | |
| 145 cyg_bool cyg_hal_stop_constructors; | |
| 146 #endif | |
| 147 | |
| 148 typedef void (*pfunc) (void); | |
| 149 extern pfunc __CTOR_LIST__[]; | |
| 150 extern pfunc __CTOR_END__[]; | |
| 151 | |
| 152 void | |
| 153 cyg_hal_invoke_constructors (void) | |
| 154 { | |
| 155 | |
| 156 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG | |
| 157 static pfunc *p = &__CTOR_END__[-1]; | |
| 158 | |
| 159 cyg_hal_stop_constructors = 0; | |
| 160 for (; p >= __CTOR_LIST__; p--) { | |
| 161 (*p) (); | |
| 162 if (cyg_hal_stop_constructors) { | |
| 163 p--; | |
| 164 break; | |
| 165 } | |
| 166 } | |
| 167 #else | |
| 168 pfunc *p; | |
| 169 | |
| 170 for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) | |
| 171 (*p) (); | |
| 172 #endif | |
| 173 } | |
| 174 | |
| 175 /*------------------------------------------------------------------------*/ | |
| 176 /* default ISR */ | |
| 177 | |
| 178 externC cyg_uint32 | |
| 179 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data) | |
| 180 { | |
| 181 CYG_TRACE1(true, "Interrupt: %d", vector); | |
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182 |
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183 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS |
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184 #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT |
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185 #ifdef CYGDBG_HAL_CTRLC_ISR |
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186 // then see if it is an incoming character interrupt and break |
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187 // into the stub ROM if the char is a ^C. |
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188 if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) ) |
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189 return 1; // interrupt handled |
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190 #endif |
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191 #endif |
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192 #endif |
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193 |
| 2 | 194 diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector, |
| 195 data); | |
| 196 CYG_FAIL("Spurious Interrupt!!!"); | |
| 197 return 0; | |
| 198 } | |
| 199 | |
| 200 /*------------------------------------------------------------------------*/ | |
| 201 /* Idle thread action */ | |
| 202 | |
| 203 void | |
| 204 hal_idle_thread_action( cyg_uint32 count ) | |
| 205 { | |
| 206 } | |
| 207 | |
| 208 /*-------------------------------------------------------------------------*/ | |
| 209 /* Misc functions */ | |
| 210 | |
| 211 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS | |
| 212 /* This function will generate a breakpoint exception. It is used at the | |
| 213 beginning of a program to sync up with a debugger and can be used | |
| 214 otherwise as a quick means to stop program execution and "break" into | |
| 215 the debugger. */ | |
| 216 | |
| 217 void | |
| 218 breakpoint(void) | |
| 219 { | |
| 220 HAL_BREAKPOINT(breakinst); | |
| 221 } | |
| 222 | |
| 223 | |
| 224 /* This function returns the opcode for a 'trap' instruction. */ | |
| 225 | |
| 226 unsigned long | |
| 227 __break_opcode (void) | |
| 228 { | |
| 229 return HAL_BREAKINST; | |
| 230 } | |
| 231 #endif | |
| 232 | |
| 233 int | |
| 234 hal_lsbindex(int mask) | |
| 235 { | |
| 236 int i; | |
| 237 for (i = 0; i < 32; i++) { | |
| 238 if (mask & (1<<i)) return (i); | |
| 239 } | |
| 240 return (-1); | |
| 241 } | |
| 242 | |
| 243 int | |
| 244 hal_msbindex(int mask) | |
| 245 { | |
| 246 int i; | |
| 247 for (i = 32; i >= 0; i++) { | |
| 248 if (mask & (1<<i)) return (i); | |
| 249 } | |
| 250 return (-1); | |
| 251 } | |
| 252 | |
| 253 #ifdef CYGHWR_HAL_ARM_DUMP_EXCEPTIONS | |
| 254 void | |
| 255 dump_frame(unsigned char *frame) | |
| 256 { | |
| 257 HAL_SavedRegisters *rp = (HAL_SavedRegisters *)frame; | |
| 258 int i; | |
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259 diag_dump_buf(frame, 128); |
| 2 | 260 diag_printf("Registers:\n"); |
| 261 for (i = 0; i <= 10; i++) { | |
| 262 if ((i == 0) || (i == 6)) diag_printf("R%d: ", i); | |
| 263 diag_printf("%08X ", rp->d[i]); | |
| 264 if ((i == 5) || (i == 10)) diag_printf("\n"); | |
| 265 } | |
| 266 diag_printf("FP: %08X, SP: %08X, LR: %08X, PC: %08X, PSR: %08X\n", | |
| 267 rp->fp, rp->sp, rp->lr, rp->pc, rp->cpsr); | |
| 268 } | |
| 269 #endif | |
| 270 | |
| 271 #if 0 | |
| 272 void | |
| 273 show_frame_in(HAL_SavedRegisters *frame) | |
| 274 { | |
| 275 int old; | |
| 276 HAL_DISABLE_INTERRUPTS(old); | |
| 277 diag_printf("[IN] IRQ Frame:\n"); | |
| 278 dump_frame((unsigned char *)frame); | |
| 279 HAL_RESTORE_INTERRUPTS(old); | |
| 280 } | |
| 281 | |
| 282 void | |
| 283 show_frame_out(HAL_SavedRegisters *frame) | |
| 284 { | |
| 285 int old; | |
| 286 HAL_DISABLE_INTERRUPTS(old); | |
| 287 diag_printf("[OUT] IRQ Frame:\n"); | |
| 288 dump_frame((unsigned char *)frame); | |
| 289 HAL_RESTORE_INTERRUPTS(old); | |
| 290 } | |
| 291 #endif | |
| 292 | |
| 293 #ifdef CYGHWR_HAL_ARM_DUMP_EXCEPTIONS | |
| 294 // Debug routines | |
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295 void cyg_hal_report_undefined_instruction(HAL_SavedRegisters *frame) |
| 2 | 296 { |
| 297 int old; | |
| 298 HAL_DISABLE_INTERRUPTS(old); | |
| 299 diag_printf("[UNDEFINED INSTRUCTION] Frame:\n"); | |
| 300 dump_frame((unsigned char *)frame); | |
| 301 HAL_RESTORE_INTERRUPTS(old); | |
| 302 } | |
| 303 | |
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304 void cyg_hal_report_software_interrupt(HAL_SavedRegisters *frame) |
| 2 | 305 { |
| 306 int old; | |
| 307 HAL_DISABLE_INTERRUPTS(old); | |
| 308 diag_printf("[SOFTWARE INTERRUPT] Frame:\n"); | |
| 309 dump_frame((unsigned char *)frame); | |
| 310 HAL_RESTORE_INTERRUPTS(old); | |
| 311 } | |
| 312 | |
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313 void cyg_hal_report_abort_prefetch(HAL_SavedRegisters *frame) |
| 2 | 314 { |
| 315 int old; | |
| 316 HAL_DISABLE_INTERRUPTS(old); | |
| 317 diag_printf("[ABORT PREFETCH] Frame:\n"); | |
| 318 dump_frame((unsigned char *)frame); | |
| 319 HAL_RESTORE_INTERRUPTS(old); | |
| 320 } | |
| 321 | |
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322 void cyg_hal_report_abort_data(HAL_SavedRegisters *frame) |
| 2 | 323 { |
| 324 int old; | |
| 325 HAL_DISABLE_INTERRUPTS(old); | |
| 326 diag_printf("[ABORT DATA] Frame:\n"); | |
| 327 dump_frame((unsigned char *)frame); | |
| 328 HAL_RESTORE_INTERRUPTS(old); | |
| 329 } | |
| 330 | |
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331 void cyg_hal_report_exception_handler_returned(HAL_SavedRegisters *frame) |
| 2 | 332 { |
| 333 int old; | |
| 334 HAL_DISABLE_INTERRUPTS(old); | |
| 335 diag_printf("Exception handler returned!\n"); | |
| 336 dump_frame((unsigned char *)frame); | |
| 337 HAL_RESTORE_INTERRUPTS(old); | |
| 338 } | |
| 339 #endif | |
| 340 | |
| 341 /*------------------------------------------------------------------------*/ | |
| 342 // EOF hal_misc.c |