| 1 | /*
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| 2 | * Copyright (c) 2007 Michal Kebrt
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| 3 | * Copyright (c) 2007 Petr Stepan
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| 4 | *
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | *
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| 11 | * - Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * - Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * - The name of the author may not be used to endorse or promote products
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| 17 | * derived from this software without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 29 | */
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| 30 |
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| 31 | /** @addtogroup arm32
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| 32 | * @{
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| 33 | */
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| 34 | /** @file
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| 35 | * @brief Exception declarations.
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| 36 | */
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| 37 |
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| 38 | #ifndef KERN_arm32_EXCEPTION_H_
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| 39 | #define KERN_arm32_EXCEPTION_H_
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| 40 |
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| 41 | #include <typedefs.h>
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| 42 | #include <arch/istate.h>
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| 43 |
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| 44 | /** If defined, forces using of high exception vectors. */
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| 45 | #define HIGH_EXCEPTION_VECTORS
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| 46 |
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| 47 | #ifdef HIGH_EXCEPTION_VECTORS
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| 48 | #define EXC_BASE_ADDRESS 0xffff0000
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| 49 | #else
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| 50 | #define EXC_BASE_ADDRESS 0x0
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| 51 | #endif
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| 52 |
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| 53 | /* Exception Vectors */
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| 54 | #define EXC_RESET_VEC (EXC_BASE_ADDRESS + 0x0)
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| 55 | #define EXC_UNDEF_INSTR_VEC (EXC_BASE_ADDRESS + 0x4)
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| 56 | #define EXC_SWI_VEC (EXC_BASE_ADDRESS + 0x8)
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| 57 | #define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc)
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| 58 | #define EXC_DATA_ABORT_VEC (EXC_BASE_ADDRESS + 0x10)
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| 59 | #define EXC_IRQ_VEC (EXC_BASE_ADDRESS + 0x18)
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| 60 | #define EXC_FIQ_VEC (EXC_BASE_ADDRESS + 0x1c)
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| 61 |
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| 62 | /* Exception numbers */
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| 63 | #define EXC_RESET 0
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| 64 | #define EXC_UNDEF_INSTR 1
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| 65 | #define EXC_SWI 2
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| 66 | #define EXC_PREFETCH_ABORT 3
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| 67 | #define EXC_DATA_ABORT 4
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| 68 | #define EXC_IRQ 5
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| 69 | #define EXC_FIQ 6
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| 70 |
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| 71 | /** Kernel stack pointer.
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| 72 | *
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| 73 | * It is set when thread switches to user mode,
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| 74 | * and then used for exception handling.
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| 75 | *
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| 76 | */
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| 77 | extern uintptr_t supervisor_sp;
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| 78 |
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| 79 | /** Temporary exception stack pointer.
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| 80 | *
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| 81 | * Temporary stack is used in exceptions handling routines
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| 82 | * before switching to thread's kernel stack.
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| 83 | *
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| 84 | */
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| 85 | extern uintptr_t exc_stack;
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| 86 |
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| 87 | extern void install_exception_handlers(void);
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| 88 | extern void exception_init(void);
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| 89 | extern void reset_exception_entry(void);
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| 90 | extern void irq_exception_entry(void);
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| 91 | extern void fiq_exception_entry(void);
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| 92 | extern void undef_instr_exception_entry(void);
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| 93 | extern void prefetch_abort_exception_entry(void);
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| 94 | extern void data_abort_exception_entry(void);
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| 95 | extern void swi_exception_entry(void);
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| 96 |
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| 97 | #endif
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| 98 |
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| 99 | /** @}
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| 100 | */
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