18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Preliminary support for HW exception handing for Microblaze 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 68c2ecf20Sopenharmony_ci * Copyright (C) 2008-2009 PetaLogix 78c2ecf20Sopenharmony_ci * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci#ifndef _ASM_MICROBLAZE_EXCEPTIONS_H 118c2ecf20Sopenharmony_ci#define _ASM_MICROBLAZE_EXCEPTIONS_H 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ci#ifdef __KERNEL__ 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci#ifndef CONFIG_MMU 168c2ecf20Sopenharmony_ci#define EX_HANDLER_STACK_SIZ (4*19) 178c2ecf20Sopenharmony_ci#endif 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci#ifndef __ASSEMBLY__ 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci/* Macros to enable and disable HW exceptions in the MSR */ 228c2ecf20Sopenharmony_ci/* Define MSR enable bit for HW exceptions */ 238c2ecf20Sopenharmony_ci#define HWEX_MSR_BIT (1 << 8) 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 268c2ecf20Sopenharmony_ci#define __enable_hw_exceptions() \ 278c2ecf20Sopenharmony_ci __asm__ __volatile__ (" msrset r0, %0; \ 288c2ecf20Sopenharmony_ci nop;" \ 298c2ecf20Sopenharmony_ci : \ 308c2ecf20Sopenharmony_ci : "i" (HWEX_MSR_BIT) \ 318c2ecf20Sopenharmony_ci : "memory") 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci#define __disable_hw_exceptions() \ 348c2ecf20Sopenharmony_ci __asm__ __volatile__ (" msrclr r0, %0; \ 358c2ecf20Sopenharmony_ci nop;" \ 368c2ecf20Sopenharmony_ci : \ 378c2ecf20Sopenharmony_ci : "i" (HWEX_MSR_BIT) \ 388c2ecf20Sopenharmony_ci : "memory") 398c2ecf20Sopenharmony_ci#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 408c2ecf20Sopenharmony_ci#define __enable_hw_exceptions() \ 418c2ecf20Sopenharmony_ci __asm__ __volatile__ (" \ 428c2ecf20Sopenharmony_ci mfs r12, rmsr; \ 438c2ecf20Sopenharmony_ci nop; \ 448c2ecf20Sopenharmony_ci ori r12, r12, %0; \ 458c2ecf20Sopenharmony_ci mts rmsr, r12; \ 468c2ecf20Sopenharmony_ci nop;" \ 478c2ecf20Sopenharmony_ci : \ 488c2ecf20Sopenharmony_ci : "i" (HWEX_MSR_BIT) \ 498c2ecf20Sopenharmony_ci : "memory", "r12") 508c2ecf20Sopenharmony_ci 518c2ecf20Sopenharmony_ci#define __disable_hw_exceptions() \ 528c2ecf20Sopenharmony_ci __asm__ __volatile__ (" \ 538c2ecf20Sopenharmony_ci mfs r12, rmsr; \ 548c2ecf20Sopenharmony_ci nop; \ 558c2ecf20Sopenharmony_ci andi r12, r12, ~%0; \ 568c2ecf20Sopenharmony_ci mts rmsr, r12; \ 578c2ecf20Sopenharmony_ci nop;" \ 588c2ecf20Sopenharmony_ci : \ 598c2ecf20Sopenharmony_ci : "i" (HWEX_MSR_BIT) \ 608c2ecf20Sopenharmony_ci : "memory", "r12") 618c2ecf20Sopenharmony_ci#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 628c2ecf20Sopenharmony_ci 638c2ecf20Sopenharmony_ciasmlinkage void full_exception(struct pt_regs *regs, unsigned int type, 648c2ecf20Sopenharmony_ci int fsr, int addr); 658c2ecf20Sopenharmony_ci 668c2ecf20Sopenharmony_ciasmlinkage void sw_exception(struct pt_regs *regs); 678c2ecf20Sopenharmony_civoid bad_page_fault(struct pt_regs *regs, unsigned long address, int sig); 688c2ecf20Sopenharmony_ci 698c2ecf20Sopenharmony_civoid die(const char *str, struct pt_regs *fp, long err); 708c2ecf20Sopenharmony_civoid _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); 718c2ecf20Sopenharmony_ci 728c2ecf20Sopenharmony_ci#endif /*__ASSEMBLY__ */ 738c2ecf20Sopenharmony_ci#endif /* __KERNEL__ */ 748c2ecf20Sopenharmony_ci#endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ 75