| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * (C) Copyright 2004, Psyent Corporation <www.psyent.com> |
| * Scott McNutt <smcnutt@psyent.com> |
| */ |
| #ifndef __ASM_NIOS2_SYSTEM_H_ |
| #define __ASM_NIOS2_SYSTEM_H_ |
| |
| #define local_irq_enable() __asm__ __volatile__ ( \ |
| "rdctl r8, status\n" \ |
| "ori r8, r8, 1\n" \ |
| "wrctl status, r8\n" \ |
| : : : "r8") |
| |
| #define local_irq_disable() __asm__ __volatile__ ( \ |
| "rdctl r8, status\n" \ |
| "andi r8, r8, 0xfffe\n" \ |
| "wrctl status, r8\n" \ |
| : : : "r8") |
| |
| #define local_save_flags(x) __asm__ __volatile__ ( \ |
| "rdctl r8, status\n" \ |
| "mov %0, r8\n" \ |
| : "=r" (x) : : "r8", "memory") |
| |
| #define local_irq_restore(x) __asm__ __volatile__ ( \ |
| "mov r8, %0\n" \ |
| "wrctl status, r8\n" \ |
| : : "r" (x) : "r8", "memory") |
| |
| /* For spinlocks etc */ |
| #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \ |
| while (0) |
| |
| #define irqs_disabled() \ |
| ({ \ |
| unsigned long flags; \ |
| local_save_flags(flags); \ |
| ((flags & NIOS2_STATUS_PIE_MSK) == 0x0); \ |
| }) |
| |
| /* indirect call to go beyond 256MB limitation of toolchain */ |
| #define nios2_callr(addr) __asm__ __volatile__ ( \ |
| "callr %0" \ |
| : : "r" (addr)) |
| |
| void display_sysid(void); |
| |
| #endif /* __ASM_NIOS2_SYSTEM_H */ |