1 /* 2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 3 * Scott McNutt <smcnutt@psyent.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 #ifndef __ASM_NIOS2_SYSTEM_H_ 8 #define __ASM_NIOS2_SYSTEM_H_ 9 10 #define local_irq_enable() __asm__ __volatile__ ( \ 11 "rdctl r8, status\n" \ 12 "ori r8, r8, 1\n" \ 13 "wrctl status, r8\n" \ 14 : : : "r8") 15 16 #define local_irq_disable() __asm__ __volatile__ ( \ 17 "rdctl r8, status\n" \ 18 "andi r8, r8, 0xfffe\n" \ 19 "wrctl status, r8\n" \ 20 : : : "r8") 21 22 #define local_save_flags(x) __asm__ __volatile__ ( \ 23 "rdctl r8, status\n" \ 24 "mov %0, r8\n" \ 25 : "=r" (x) : : "r8", "memory") 26 27 #define local_irq_restore(x) __asm__ __volatile__ ( \ 28 "mov r8, %0\n" \ 29 "wrctl status, r8\n" \ 30 : : "r" (x) : "r8", "memory") 31 32 /* For spinlocks etc */ 33 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \ 34 while (0) 35 36 #define irqs_disabled() \ 37 ({ \ 38 unsigned long flags; \ 39 local_save_flags(flags); \ 40 ((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \ 41 }) 42 43 /* indirect call to go beyond 256MB limitation of toolchain */ 44 #define nios2_callr(addr) __asm__ __volatile__ ( \ 45 "callr %0" \ 46 : : "r" (addr)) 47 48 #endif /* __ASM_NIOS2_SYSTEM_H */ 49