1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 4 * Scott McNutt <smcnutt@psyent.com> 5 */ 6 #ifndef __ASM_NIOS2_SYSTEM_H_ 7 #define __ASM_NIOS2_SYSTEM_H_ 8 9 #define local_irq_enable() __asm__ __volatile__ ( \ 10 "rdctl r8, status\n" \ 11 "ori r8, r8, 1\n" \ 12 "wrctl status, r8\n" \ 13 : : : "r8") 14 15 #define local_irq_disable() __asm__ __volatile__ ( \ 16 "rdctl r8, status\n" \ 17 "andi r8, r8, 0xfffe\n" \ 18 "wrctl status, r8\n" \ 19 : : : "r8") 20 21 #define local_save_flags(x) __asm__ __volatile__ ( \ 22 "rdctl r8, status\n" \ 23 "mov %0, r8\n" \ 24 : "=r" (x) : : "r8", "memory") 25 26 #define local_irq_restore(x) __asm__ __volatile__ ( \ 27 "mov r8, %0\n" \ 28 "wrctl status, r8\n" \ 29 : : "r" (x) : "r8", "memory") 30 31 /* For spinlocks etc */ 32 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \ 33 while (0) 34 35 #define irqs_disabled() \ 36 ({ \ 37 unsigned long flags; \ 38 local_save_flags(flags); \ 39 ((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \ 40 }) 41 42 /* indirect call to go beyond 256MB limitation of toolchain */ 43 #define nios2_callr(addr) __asm__ __volatile__ ( \ 44 "callr %0" \ 45 : : "r" (addr)) 46 47 void display_sysid(void); 48 49 #endif /* __ASM_NIOS2_SYSTEM_H */ 50