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#ifndef CYGONCE_HAL_HAL_INTR_H #define CYGONCE_HAL_HAL_INTR_H //========================================================================== // // hal_intr.h // // HAL Interrupt and clock support // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): proven // Contributors: proven, jskov, pjo, nickg // Date: 1999-02-20 // Purpose: Define Interrupt support // Description: The macros defined here provide the HAL APIs for handling // interrupts and the clock. // // Usage: // #include <cyg/hal/hal_intr.h> // ... // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/hal.h> #include <pkgconf/hal_i386.h> #include <cyg/infra/cyg_type.h> #include <cyg/hal/var_intr.h> //-------------------------------------------------------------------------- // Exception vectors. // Standard exception vectors supported by most IA32 CPUs #define CYGNUM_HAL_VECTOR_DIV0 0 #define CYGNUM_HAL_VECTOR_DEBUG 1 #define CYGNUM_HAL_VECTOR_NMI 2 #define CYGNUM_HAL_VECTOR_BREAKPOINT 3 #define CYGNUM_HAL_VECTOR_OVERFLOW 4 #define CYGNUM_HAL_VECTOR_BOUND 5 #define CYGNUM_HAL_VECTOR_OPCODE 6 #define CYGNUM_HAL_VECTOR_NO_DEVICE 7 #define CYGNUM_HAL_VECTOR_DOUBLE_FAULT 8 #define CYGNUM_HAL_VECTOR_INVALID_TSS 10 #define CYGNUM_HAL_VECTOR_SEGV 11 #define CYGNUM_HAL_VECTOR_STACK_FAULT 12 #define CYGNUM_HAL_VECTOR_PROTECTION 13 #define CYGNUM_HAL_VECTOR_PAGE 14 #define CYGNUM_HAL_VECTOR_FPE 16 #define CYGNUM_HAL_VECTOR_ALIGNMENT 17 // The default size of the VSR table is 256 entries. #ifndef CYGNUM_HAL_VSR_MIN #define CYGNUM_HAL_VSR_MIN 0 #define CYGNUM_HAL_VSR_MAX 255 #define CYGNUM_HAL_VSR_COUNT 256 #endif // Common exception vectors. #define CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION CYGNUM_HAL_VECTOR_OPCODE #define CYGNUM_HAL_EXCEPTION_INTERRUPT CYGNUM_HAL_VECTOR_BREAKPOINT #define CYGNUM_HAL_EXCEPTION_CODE_ACCESS CYGNUM_HAL_VECTOR_PROTECTION #define CYGNUM_HAL_EXCEPTION_DATA_ACCESS CYGNUM_HAL_VECTOR_PROTECTION #define CYGNUM_HAL_EXCEPTION_TRAP CYGNUM_HAL_VECTOR_DEBUG #define CYGNUM_HAL_EXCEPTION_FPU CYGNUM_HAL_VECTOR_FPE #define CYGNUM_HAL_EXCEPTION_STACK_OVERFLOW CYGNUM_HAL_VECTOR_SEGV #define CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO CYGNUM_HAL_VECTOR_DIV0 #define CYGNUM_HAL_EXCEPTION_OVERFLOW CYGNUM_HAL_VECTOR_OVERFLOW #define CYGNUM_HAL_EXCEPTION_MIN 0 #define CYGNUM_HAL_EXCEPTION_MAX 31 #define CYGNUM_HAL_EXCEPTION_COUNT (CYGNUM_HAL_EXCEPTION_MAX - CYGNUM_HAL_EXCEPTION_MIN + 1) // These really are wild guesses on my part... #define CYGNUM_HAL_VECTOR_SIGBUS CYGNUM_HAL_EXCEPTION_DATA_ACCESS #define CYGNUM_HAL_VECTOR_SIGFPE CYGNUM_HAL_EXCEPTION_FPU #define CYGNUM_HAL_VECTOR_SIGSEGV CYGNUM_HAL_VECTOR_SEGV //-------------------------------------------------------------------------- // Static data used by HAL // ISR tables externC volatile CYG_ADDRESS hal_interrupt_handlers[CYGNUM_HAL_ISR_COUNT]; externC volatile CYG_ADDRWORD hal_interrupt_data[CYGNUM_HAL_ISR_COUNT]; externC volatile CYG_ADDRESS hal_interrupt_objects[CYGNUM_HAL_ISR_COUNT]; // VSR table externC volatile CYG_ADDRESS hal_vsr_table[CYGNUM_HAL_VSR_COUNT]; //-------------------------------------------------------------------------- // Interrupt state storage typedef cyg_uint32 CYG_INTERRUPT_STATE; //--------------------------------------------------------------------------- // Default ISR externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data); #define HAL_DEFAULT_ISR hal_default_isr //-------------------------------------------------------------------------- // CPU interrupt enable/disable macros #define HAL_ENABLE_INTERRUPTS() \ CYG_MACRO_START \ asm ("sti") ; \ CYG_MACRO_END #define HAL_DISABLE_INTERRUPTS(_old_) \ CYG_MACRO_START \ register int x ; \ asm volatile ( \ "pushfl ;" \ "popl %0 ;" \ "cli" \ : "=r" (x) \ ) ; \ (_old_) = (x & 0x200); \ CYG_MACRO_END #define HAL_RESTORE_INTERRUPTS(_old_) \ CYG_MACRO_START \ register int x = _old_; \ asm volatile ( "pushfl ;" \ "popl %%eax ;" \ "andl $0xFFFFFDFF,%%eax;" \ "orl %0,%%eax;" \ "pushl %%eax;" \ "popfl ;" \ : /* No outputs */ \ : "r"(x) \ : "eax" \ ); \ CYG_MACRO_END #define HAL_QUERY_INTERRUPTS(_old_) \ CYG_MACRO_START \ register int x ; \ asm volatile ("pushfl ;" \ "popl %0" \ : "=r" (x) \ ); \ (_old_) = (x & 0x200); \ CYG_MACRO_END //-------------------------------------------------------------------------- // Routine to execute DSRs using separate interrupt stack #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK externC void hal_interrupt_stack_call_pending_DSRs(void); #define HAL_INTERRUPT_STACK_CALL_PENDING_DSRS() \ hal_interrupt_stack_call_pending_DSRs() // these are offered solely for stack usage testing // if they are not defined, then there is no interrupt stack. #define HAL_INTERRUPT_STACK_BASE cyg_interrupt_stack_base #define HAL_INTERRUPT_STACK_TOP cyg_interrupt_stack // use them to declare these extern however you want: // extern char HAL_INTERRUPT_STACK_BASE[]; // extern char HAL_INTERRUPT_STACK_TOP[]; // is recommended #endif //--------------------------------------------------------------------------- // Interrupt and VSR attachment macros #define HAL_INTERRUPT_IN_USE( _vector_, _state_) \ CYG_MACRO_START \ cyg_uint32 _index_; \ HAL_TRANSLATE_VECTOR ((_vector_), _index_); \ \ if (hal_interrupt_handlers[_index_] \ ==(CYG_ADDRESS)HAL_DEFAULT_ISR) \ (_state_) = 0; \ else \ (_state_) = 1; \ CYG_MACRO_END #ifndef HAL_INTERRUPT_ATTACH externC void __default_interrupt_vsr(void); #define HAL_INTERRUPT_ATTACH( _vector_, _isr_, _data_, _object_ ) \ CYG_MACRO_START \ cyg_uint32 _index_; \ HAL_TRANSLATE_VECTOR((_vector_), _index_); \ \ HAL_VSR_SET( _vector_, &__default_interrupt_vsr , NULL); \ if( hal_interrupt_handlers[_index_] == (CYG_ADDRESS)HAL_DEFAULT_ISR ) \ { \ hal_interrupt_handlers[_index_] = (CYG_ADDRESS)(_isr_); \ hal_interrupt_data[_index_] = (CYG_ADDRWORD)(_data_); \ hal_interrupt_objects[_index_] = (CYG_ADDRESS)(_object_); \ } \ CYG_MACRO_END #endif /* HAL_INTERRUPT_ATTACH */ #define HAL_INTERRUPT_DETACH( _vector_, _isr_ ) \ CYG_MACRO_START \ cyg_uint32 _index_; \ HAL_TRANSLATE_VECTOR((_vector_), _index_); \ \ if (hal_interrupt_handlers[_index_] \ == (CYG_ADDRESS)(_isr_)) \ { \ hal_interrupt_handlers[_index_] = \ (CYG_ADDRESS)HAL_DEFAULT_ISR; \ hal_interrupt_data[_index_] = 0; \ hal_interrupt_objects[_index_] = 0; \ } \ CYG_MACRO_END #define HAL_VSR_GET( _vector_, _pvsr_ ) \ *((CYG_ADDRESS *)(_pvsr_)) = hal_vsr_table[(_vector_)]; #define HAL_VSR_SET( _vector_, _vsr_, _poldvsr_ ) \ CYG_MACRO_START \ if( (_poldvsr_) != NULL ) \ *(CYG_ADDRESS *)(_poldvsr_) = hal_vsr_table[(_vector_)]; \ hal_vsr_table[(_vector_)] = (CYG_ADDRESS)(_vsr_); \ CYG_MACRO_END // This is an ugly name, but what it means is: grab the VSR back to eCos // internal handling, or if you like, the default handler. But if // cooperating with GDB and CygMon, the default behaviour is to pass most // exceptions to CygMon. This macro undoes that so that eCos handles the // exception. So use it with care. externC void __default_exception_vsr(void); externC void __default_interrupt_vsr(void); #define HAL_VSR_SET_TO_ECOS_HANDLER( _vector_, _poldvsr_ ) \ CYG_MACRO_START \ HAL_VSR_SET( _vector_, _vector_ > CYGNUM_HAL_EXCEPTION_MAX \ ? (CYG_ADDRESS)__default_interrupt_vsr \ : (CYG_ADDRESS)__default_exception_vsr, \ _poldvsr_ ); \ CYG_MACRO_END //--------------------------------------------------------------------------- #endif // ifndef CYGONCE_HAL_HAL_INTR_H // End of hal_intr.h
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