| 0,0 → 1,144 |
|---|
| /* |
| * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup arm32 |
| * @{ |
| */ |
| /** @file |
| * @brief Exception declarations. |
| */ |
| |
| #ifndef KERN_arm32_EXCEPTION_H_ |
| #define KERN_arm32_EXCEPTION_H_ |
| |
| #include <arch/types.h> |
| #include <arch/regutils.h> |
| |
| /** If defined, forces using of high exception vectors. */ |
| #define HIGH_EXCEPTION_VECTORS |
| |
| #ifdef HIGH_EXCEPTION_VECTORS |
| #define EXC_BASE_ADDRESS 0xffff0000 |
| #else |
| #define EXC_BASE_ADDRESS 0x0 |
| #endif |
| |
| /* Exception Vectors */ |
| #define EXC_RESET_VEC (EXC_BASE_ADDRESS + 0x0) |
| #define EXC_UNDEF_INSTR_VEC (EXC_BASE_ADDRESS + 0x4) |
| #define EXC_SWI_VEC (EXC_BASE_ADDRESS + 0x8) |
| #define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc) |
| #define EXC_DATA_ABORT_VEC (EXC_BASE_ADDRESS + 0x10) |
| #define EXC_IRQ_VEC (EXC_BASE_ADDRESS + 0x18) |
| #define EXC_FIQ_VEC (EXC_BASE_ADDRESS + 0x1c) |
| |
| /* Exception numbers */ |
| #define EXC_RESET 0 |
| #define EXC_UNDEF_INSTR 1 |
| #define EXC_SWI 2 |
| #define EXC_PREFETCH_ABORT 3 |
| #define EXC_DATA_ABORT 4 |
| #define EXC_IRQ 5 |
| #define EXC_FIQ 6 |
| |
| |
| /** Kernel stack pointer. |
| * |
| * It is set when thread switches to user mode, |
| * and then used for exception handling. |
| */ |
| extern uintptr_t supervisor_sp; |
| |
| |
| /** Temporary exception stack pointer. |
| * |
| * Temporary stack is used in exceptions handling routines |
| * before switching to thread's kernel stack. |
| */ |
| extern uintptr_t exc_stack; |
| |
| |
| /** Struct representing CPU state saved when an exception occurs. */ |
| typedef struct { |
| uint32_t spsr; |
| uint32_t sp; |
| uint32_t lr; |
| |
| uint32_t r0; |
| uint32_t r1; |
| uint32_t r2; |
| uint32_t r3; |
| uint32_t r4; |
| uint32_t r5; |
| uint32_t r6; |
| uint32_t r7; |
| uint32_t r8; |
| uint32_t r9; |
| uint32_t r10; |
| uint32_t r11; |
| uint32_t r12; |
| |
| uint32_t pc; |
| } istate_t; |
| |
| |
| /** Sets Program Counter member of given istate structure. |
| * |
| * @param istate istate structure |
| * @param retaddr new value of istate's PC member |
| */ |
| static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr) |
| { |
| istate->pc = retaddr; |
| } |
| |
| |
| /** Returns true if exception happened while in userspace. */ |
| static inline int istate_from_uspace(istate_t *istate) |
| { |
| return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE; |
| } |
| |
| |
| /** Returns Program Counter member of given istate structure. */ |
| static inline unative_t istate_get_pc(istate_t *istate) |
| { |
| return istate->pc; |
| } |
| |
| |
| extern void install_exception_handlers(void); |
| extern void exception_init(void); |
| extern void print_istate(istate_t *istate); |
| |
| |
| #endif |
| |
| /** @} |
| */ |