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/*
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#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))