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/* $OpenBSD: m88410.h,v 1.4 2001/12/22 08:31:05 smurph Exp $ */
/*
* Copyright (c) 2001 Steve Murphree, Jr.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Steve Murphree.
* 4. 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 __MACHINE_M88410_H__
#define __MACHINE_M88410_H__
/*
* mc88410 External Cache Controller definitions
* This is only available on MVME197DP/SP models.
*/
#ifndef _LOCORE
#include <machine/asm_macro.h>
#include <machine/psl.h>
#ifdef _KERNEL
#include <mvme88k/dev/busswreg.h>
#endif
#define XCC_NOP "0x0"
#define XCC_FLUSH_PAGE "0x1"
#define XCC_FLUSH_ALL "0x2"
#define XCC_INVAL_ALL "0x3"
#define XCC_ADDR 0xFF800000
static __inline__ void mc88410_flush_page(vm_offset_t physaddr)
{
vm_offset_t xccaddr = XCC_ADDR | (physaddr >> PGSHIFT);
m88k_psr_type psr;
struct bussw_reg *bs = (struct bussw_reg *)BS_BASE;
u_short bs_gcsr = bs->bs_gcsr;
u_short bs_romcr = bs->bs_romcr;
psr = get_psr();
/* mask misaligned exceptions */
set_psr(psr | PSR_MXM);
/* clear WEN0 and WEN1 in ROMCR (disables writes to FLASH) */
bs->bs_romcr &= ~(BS_ROMCR_WEN0 | BS_ROMCR_WEN0) ;
/* set XCC bit in GCSR (0xFF8xxxxx now decodes to mc88410) */
bs->bs_gcsr |= BS_GCSR_XCC;
/* load the value of upper32 into r2 */
__asm__ __volatile__("or r2,r0," XCC_FLUSH_PAGE);
/* load the value of lower32 into r3 (always 0) */
__asm__ __volatile__("or r3,r0,r0");
/* load the value of xccaddr into r4 */
__asm__ __volatile__("or.u r5,r0,hi16(%0)" : : "r" (xccaddr));
__asm__ __volatile__("ld r4,r5,lo16(%0)" : : "r" (xccaddr));
/* make the double write. bang! */
__asm__ __volatile__("st.d r2,r4,0");
/* spin until the operation starts */
while (!bs->bs_xccr & BS_XCC_FBSY)
;
/* restore PSR and friends */
set_psr(psr);
flush_pipeline();
bs->bs_gcsr = bs_gcsr;
bs->bs_romcr = bs_romcr;
}
static __inline__ void mc88410_flush(void)
{
m88k_psr_type psr;
struct bussw_reg *bs = (struct bussw_reg *)BS_BASE;
u_short bs_gcsr = bs->bs_gcsr;
u_short bs_romcr = bs->bs_romcr;
psr = get_psr();
/* mask misaligned exceptions */
set_psr(psr | PSR_MXM);
/* clear WEN0 and WEN1 in ROMCR (disables writes to FLASH) */
bs->bs_romcr &= ~(BS_ROMCR_WEN0 | BS_ROMCR_WEN0) ;
/* set XCC bit in GCSR (0xFF8xxxxx now decodes to mc88410) */
bs->bs_gcsr |= BS_GCSR_XCC;
/* load the value of upper32 into r2 */
__asm__ __volatile__("or r2,r0," XCC_FLUSH_ALL);
/* load the value of lower32 into r3 (always 0) */
__asm__ __volatile__("or r3,r0,r0");
/* load the value of xccaddr into r4 */
__asm__ __volatile__("or.u r5,r0,hi16(0xFF800000)");
__asm__ __volatile__("or r4,r5,r0"); /* r4 is now 0xFF800000 */
/* make the double write. bang! */
__asm__ __volatile__("st.d r2,r4,0");
/* spin until the operation starts */
while (!bs->bs_xccr & BS_XCC_FBSY)
;
/* restore PSR and friends */
set_psr(psr);
flush_pipeline();
bs->bs_gcsr = bs_gcsr;
bs->bs_romcr = bs_romcr;
}
static __inline__ void mc88410_inval(void)
{
m88k_psr_type psr;
struct bussw_reg *bs = (struct bussw_reg *)BS_BASE;
u_short bs_gcsr = bs->bs_gcsr;
u_short bs_romcr = bs->bs_romcr;
psr = get_psr();
/* mask misaligned exceptions */
set_psr(psr | PSR_MXM);
/* clear WEN0 and WEN1 in ROMCR (disables writes to FLASH) */
bs->bs_romcr &= ~(BS_ROMCR_WEN0 | BS_ROMCR_WEN0) ;
/* set XCC bit in GCSR (0xFF8xxxxx now decodes to mc88410) */
bs->bs_gcsr |= BS_GCSR_XCC;
/* load the value of upper32 into r2 */
__asm__ __volatile__("or r2,r0," XCC_INVAL_ALL);
/* load the value of lower32 into r3 (always 0) */
__asm__ __volatile__("or r3,r0,r0");
/* load the value of xccaddr into r4 */
__asm__ __volatile__("or.u r5,r0,hi16(0xFF800000)");
__asm__ __volatile__("or r4,r5,r0"); /* r4 is now 0xFF800000 */
/* make the double write. bang! */
__asm__ __volatile__("st.d r2,r4,0");
/* spin until the operation starts */
while (!bs->bs_xccr & BS_XCC_FBSY)
;
/* restore PSR and friends */
set_psr(psr);
flush_pipeline();
bs->bs_gcsr = bs_gcsr;
bs->bs_romcr = bs_romcr;
}
static __inline__ void mc88410_sync(void)
{
mc88410_flush();
mc88410_inval();
}
#endif /* _LOCORE */
#endif __MACHINE_M88410_H__
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