/*      $NetBSD: cpufunc.h,v 1.4 2010/07/24 09:35:36 jruoho Exp $       */

/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/

#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_

#ifdef _KERNEL

#include <sys/types.h>
#include <machine/ia64_cpu.h>
#include <machine/vmparam.h>

struct thread;

#define IA64_FIXED_BREAK        0x84B5D

#ifdef __GNUC__

static __inline void
breakpoint(void)
{

       __asm __volatile("break.m %0" :: "i"(IA64_FIXED_BREAK));
}

#define HAVE_INLINE_FFS
#define ffs(x)  __builtin_ffs(x)

#endif

extern uint64_t ia64_port_base;
#define __MEMIO_ADDR(x)         (__volatile void*)(IA64_PHYS_TO_RR6(x))
#define __PIO_ADDR(x)           (__volatile void*)(ia64_port_base |     \
       (((x) & 0xFFFC) << 10) | ((x) & 0xFFF))

/*
* I/O port reads with ia32 semantics.
*/
static __inline uint8_t
inb(unsigned int port)
{
       __volatile uint8_t *p;
       uint8_t v;
       p = __PIO_ADDR(port);
       ia64_mf();
       v = *p;
       ia64_mf_a();
       ia64_mf();
       return v;
}

static __inline uint16_t
inw(unsigned int port)
{
       __volatile uint16_t *p;
       uint16_t v;

       p = __PIO_ADDR(port);
       ia64_mf();
       v = *p;
       ia64_mf_a();
       ia64_mf();
       return v;
}

static __inline uint32_t
inl(unsigned int port)
{
       volatile uint32_t *p;
       uint32_t v;

       p = __PIO_ADDR(port);
       ia64_mf();
       v = *p;
       ia64_mf_a();
       ia64_mf();
       return v;
}

static __inline void
insb(unsigned int port, void *addr, size_t count)
{
       uint8_t *buf = addr;

       while (count--)
               *buf++ = inb(port);
}

static __inline void
insw(unsigned int port, void *addr, size_t count)
{
       uint16_t *buf = addr;

       while (count--)
               *buf++ = inw(port);
}

static __inline void
insl(unsigned int port, void *addr, size_t count)
{
       uint32_t *buf = addr;

       while (count--)
               *buf++ = inl(port);
}

static __inline void
outb(unsigned int port, uint8_t data)
{
       volatile uint8_t *p;

       p = __PIO_ADDR(port);
       ia64_mf();
       *p = data;
       ia64_mf_a();
       ia64_mf();
}

static __inline void
outw(unsigned int port, uint16_t data)
{
       volatile uint16_t *p;

       p = __PIO_ADDR(port);
       ia64_mf();
       *p = data;
       ia64_mf_a();
       ia64_mf();
}

static __inline void
outl(unsigned int port, uint32_t data)
{
       volatile uint32_t *p;

       p = __PIO_ADDR(port);
       ia64_mf();
       *p = data;
       ia64_mf_a();
       ia64_mf();
}

static __inline void
outsb(unsigned int port, const void *addr, size_t count)
{
       const uint8_t *buf = addr;

       while (count--)
               outb(port, *buf++);
}

static __inline void
outsw(unsigned int port, const void *addr, size_t count)
{
       const uint16_t *buf = addr;

       while (count--)
               outw(port, *buf++);
}

static __inline void
outsl(unsigned int port, const void *addr, size_t count)
{
       const uint32_t *buf = addr;

       while (count--)
               outl(port, *buf++);
}

static __inline void
disable_intr(void)
{

       __asm __volatile ("rsm psr.i");
}

static __inline void
enable_intr(void)
{

       __asm __volatile ("ssm psr.i;; srlz.d");
}

static __inline register_t
intr_disable(void)
{
       register_t psr;

       __asm __volatile ("mov %0=psr;;" : "=r"(psr));
       disable_intr();
       return (psr & IA64_PSR_I) ? 1 : 0;
}

static __inline void
intr_restore(register_t ie)
{

       if (ie)
               enable_intr();
}

#endif /* _KERNEL */

#endif /* !_MACHINE_CPUFUNC_H_ */