| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Preliminary support for HW exception handing for Microblaze |
| 3 | * |
| 4 | * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> |
| 5 | * Copyright (C) 2008-2009 PetaLogix |
| 6 | * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General |
| 9 | * Public License. See the file COPYING in the main directory of this |
| 10 | * archive for more details. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _ASM_MICROBLAZE_EXCEPTIONS_H |
| 14 | #define _ASM_MICROBLAZE_EXCEPTIONS_H |
| 15 | |
| 16 | #ifdef __KERNEL__ |
| 17 | |
| 18 | #ifndef CONFIG_MMU |
| 19 | #define EX_HANDLER_STACK_SIZ (4*19) |
| 20 | #endif |
| 21 | |
| 22 | #ifndef __ASSEMBLY__ |
| 23 | |
| 24 | /* Macros to enable and disable HW exceptions in the MSR */ |
| 25 | /* Define MSR enable bit for HW exceptions */ |
| 26 | #define HWEX_MSR_BIT (1 << 8) |
| 27 | |
| 28 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 29 | #define __enable_hw_exceptions() \ |
| 30 | __asm__ __volatile__ (" msrset r0, %0; \ |
| 31 | nop;" \ |
| 32 | : \ |
| 33 | : "i" (HWEX_MSR_BIT) \ |
| 34 | : "memory") |
| 35 | |
| 36 | #define __disable_hw_exceptions() \ |
| 37 | __asm__ __volatile__ (" msrclr r0, %0; \ |
| 38 | nop;" \ |
| 39 | : \ |
| 40 | : "i" (HWEX_MSR_BIT) \ |
| 41 | : "memory") |
| 42 | #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 43 | #define __enable_hw_exceptions() \ |
| 44 | __asm__ __volatile__ (" \ |
| 45 | mfs r12, rmsr; \ |
| 46 | nop; \ |
| 47 | ori r12, r12, %0; \ |
| 48 | mts rmsr, r12; \ |
| 49 | nop;" \ |
| 50 | : \ |
| 51 | : "i" (HWEX_MSR_BIT) \ |
| 52 | : "memory", "r12") |
| 53 | |
| 54 | #define __disable_hw_exceptions() \ |
| 55 | __asm__ __volatile__ (" \ |
| 56 | mfs r12, rmsr; \ |
| 57 | nop; \ |
| 58 | andi r12, r12, ~%0; \ |
| 59 | mts rmsr, r12; \ |
| 60 | nop;" \ |
| 61 | : \ |
| 62 | : "i" (HWEX_MSR_BIT) \ |
| 63 | : "memory", "r12") |
| 64 | #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 65 | |
| 66 | asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, |
| 67 | int fsr, int addr); |
| 68 | |
| 69 | asmlinkage void sw_exception(struct pt_regs *regs); |
| 70 | void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig); |
| 71 | |
| 72 | void die(const char *str, struct pt_regs *fp, long err); |
| 73 | void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); |
| 74 | |
| 75 | #endif /*__ASSEMBLY__ */ |
| 76 | #endif /* __KERNEL__ */ |
| 77 | #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ |