| Michal Simek | c4df4bc | 2009-03-27 14:25:13 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Preliminary support for HW exception handing for Microblaze |
| 3 | * |
| 4 | * Copyright (C) 2008 Michal Simek |
| 5 | * Copyright (C) 2008 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 | #ifndef __ASSEMBLY__ |
| 18 | |
| 19 | /* Macros to enable and disable HW exceptions in the MSR */ |
| 20 | /* Define MSR enable bit for HW exceptions */ |
| 21 | #define HWEX_MSR_BIT (1 << 8) |
| 22 | |
| 23 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 24 | #define __enable_hw_exceptions() \ |
| 25 | __asm__ __volatile__ (" msrset r0, %0; \ |
| 26 | nop;" \ |
| 27 | : \ |
| 28 | : "i" (HWEX_MSR_BIT) \ |
| 29 | : "memory") |
| 30 | |
| 31 | #define __disable_hw_exceptions() \ |
| 32 | __asm__ __volatile__ (" msrclr r0, %0; \ |
| 33 | nop;" \ |
| 34 | : \ |
| 35 | : "i" (HWEX_MSR_BIT) \ |
| 36 | : "memory") |
| 37 | #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 38 | #define __enable_hw_exceptions() \ |
| 39 | __asm__ __volatile__ (" \ |
| 40 | mfs r12, rmsr; \ |
| 41 | nop; \ |
| 42 | ori r12, r12, %0; \ |
| 43 | mts rmsr, r12; \ |
| 44 | nop;" \ |
| 45 | : \ |
| 46 | : "i" (HWEX_MSR_BIT) \ |
| 47 | : "memory", "r12") |
| 48 | |
| 49 | #define __disable_hw_exceptions() \ |
| 50 | __asm__ __volatile__ (" \ |
| 51 | mfs r12, rmsr; \ |
| 52 | nop; \ |
| 53 | andi r12, r12, ~%0; \ |
| 54 | mts rmsr, r12; \ |
| 55 | nop;" \ |
| 56 | : \ |
| 57 | : "i" (HWEX_MSR_BIT) \ |
| 58 | : "memory", "r12") |
| 59 | #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 60 | |
| 61 | asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, |
| 62 | int fsr, int addr); |
| 63 | |
| 64 | #if defined(CONFIG_XMON) |
| 65 | extern void xmon(struct pt_regs *regs); |
| 66 | extern int xmon_bpt(struct pt_regs *regs); |
| 67 | extern int xmon_sstep(struct pt_regs *regs); |
| 68 | extern int xmon_iabr_match(struct pt_regs *regs); |
| 69 | extern int xmon_dabr_match(struct pt_regs *regs); |
| 70 | extern void (*xmon_fault_handler)(struct pt_regs *regs); |
| 71 | |
| 72 | void (*debugger)(struct pt_regs *regs) = xmon; |
| 73 | int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt; |
| 74 | int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep; |
| 75 | int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match; |
| 76 | int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match; |
| 77 | void (*debugger_fault_handler)(struct pt_regs *regs); |
| 78 | #elif defined(CONFIG_KGDB) |
| 79 | void (*debugger)(struct pt_regs *regs); |
| 80 | int (*debugger_bpt)(struct pt_regs *regs); |
| 81 | int (*debugger_sstep)(struct pt_regs *regs); |
| 82 | int (*debugger_iabr_match)(struct pt_regs *regs); |
| 83 | int (*debugger_dabr_match)(struct pt_regs *regs); |
| 84 | void (*debugger_fault_handler)(struct pt_regs *regs); |
| 85 | #else |
| 86 | #define debugger(regs) do { } while (0) |
| 87 | #define debugger_bpt(regs) 0 |
| 88 | #define debugger_sstep(regs) 0 |
| 89 | #define debugger_iabr_match(regs) 0 |
| 90 | #define debugger_dabr_match(regs) 0 |
| 91 | #define debugger_fault_handler ((void (*)(struct pt_regs *))0) |
| 92 | #endif |
| 93 | |
| 94 | #endif /*__ASSEMBLY__ */ |
| 95 | #endif /* __KERNEL__ */ |
| 96 | #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ |