source: mainline/arch/ia64/include/asm.h@ dbd1059

/*
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __ia64_ASM_H__
#define __ia64_ASM_H__

#include <arch/types.h>
#include <config.h>

/** Return base address of current stack
 *
 * Return the base address of the current stack.
 * The stack is assumed to be STACK_SIZE long.
 * The stack must start on page boundary.
 */
static inline __address get_stack_base(void)
{
        __u64 v;

        __asm__ volatile ("and %0 = %1, r12" : "=r" (v) : "r" (~(STACK_SIZE-1)));
        
        return v;
}

/** Read IVR (External Interrupt Vector Register)
 *
 * @return Highest priority, pending, unmasked external interrupt vector.
 */
static inline __u8 read_ivr(void)
{
        __u64 v;
        
        __asm__ volatile ("mov %0 = cr65\n" : "=r" (v));
        
        return (__u8) (v & 0xf);
}


void cpu_sleep(void);

void asm_delay_loop(__u32 t);


#define set_shadow_register(reg,val) {__u64 v = val; __asm__  volatile("mov r15 = %0;;\n""bsw.0;;\n""mov "   #reg   " = r15;;\n""bsw.1;;\n" : : "r" (v) : "r15" ); }
#define get_shadow_register(reg,val) {__u64 v ; __asm__  volatile("bsw.0;;\n" "mov r15 = r" #reg ";;\n" "bsw.1;;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }

#define get_control_register(reg,val) {__u64 v ; __asm__  volatile("mov r15 = cr" #reg ";;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
#define get_aplication_register(reg,val) {__u64 v ; __asm__  volatile("mov r15 = ar" #reg ";;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }
#define get_psr(val) {__u64 v ; __asm__  volatile("mov r15 = psr;;\n" "mov %0 = r15;;\n" : "=r" (v) : : "r15" ); val=v; }


void cpu_halt(void);




#endif