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-/*
- * Copyright (C) 1993, 1994 by
- * Digital Equipment Corporation, Maynard, Massachusetts.
- * All rights reserved.
- *
- * This software is furnished under a license and may be used and copied
- * only in accordance of the terms of such license and with the
- * inclusion of the above copyright notice. This software or any other
- * copies thereof may not be provided or otherwise made available to any
- * other person. No title to and ownership of the software is hereby
- * transferred.
- *
- * The information in this software is subject to change without notice
- * and should not be construed as a commitment by Digital Equipment
- * Corporation.
- *
- * Digital assumes no responsibility for the use or reliability of its
- * software on equipment which is not supplied by Digital.
- *
- */
-
-
-#include "alpha-regdef.h"
-
-#define LEAF_ENTRY(NAME) .text ; .align 4 ; .globl NAME ; .ent NAME, 0 ; NAME: ; .frame sp, 0, ra ; .prologue 0 ;
-
-
-LEAF_ENTRY(flush_i_cache)
- call_pal 0x86 /* IMB */
- ret zero, (ra) /* return */
- .end flush_i_cache
-
-
-
-/* ++
- *
- * VOID
- * outVti(
- * ULONG Port
- * ULONG Data
- * )
- *
- * Routine Description:
- *
- * This Function Uses The 64-Bit Super-Page To Write Data To A Port
- * Of The On-Board VTI Combo Chip For JENSEN.
- *
- * Arguments:
- *
- * Port (A0) - Port Number On VTI Chip To Which To Write Data
- * data (a1) - data to write to the port, only low byte is significant
- * To The VTI
- *
- * Return Value:
- *
- * None.
- *
- */
-
- LEAF_ENTRY(outVti)
-
- /*
- * generate super-page address of vti, base address
- * N.B. - Upper Bits Must Be Sign Extension Of Bit 42
- * va<42:41> = 10 (binary) for super-page address
- */
-
- lda t0, 0xc01c(zero) /* t0 = ffff ffff ffff c01c */
- sll t0, 28, t0 /* t0 = ffff fc01 c000 0000 */
-
-
- /*
- * Shift In The Port Number To Generate The Port Address We
- * wish to access
- * N.B. - Access Width Is Always Zero = Byte Access For VTI
- */
-
- sll a0, 9, a0 /* a0 << 9 */
- bis t0, a0, t0 /* T0 = Address Of VTI Port */
-
-
- /*
- * Do The Port Write, Guarantee That Subsequent Writes (And Reads)
- * are ordered with respect to this write and return to caller
- */
-
- stl a1, 0(t0) /* write data to port */
- mb /* guarantee write ordering */
-
- ret zero, (ra) /* return */
-
- .end outVti
-
-
-
-/*
- *
- * ULONG
- * inVti(
- * ULONG Port
- * )
- *
- * Routine Description:
- *
- * This Function Uses The 64-Bit Super-Page To Read Data From A Port
- * Of The On-Board VTI Combo Chip For JENSEN.
- *
- * Arguments:
- *
- * Port (A0) - Port Number On VTI Chip To Which To Write Data
- *
- * Return Value:
- *
- * Data (V0) - The Data Read From The VTI Chip, Only The Low Byte Will
- * be valid
- *
- */
-
- LEAF_ENTRY(inVti)
-
- /*
- * generate super-page address of vti, base address
- * N.B. - Upper Bits Must Be Sign Extension Of Bit 42
- * va<42:41> = 10 (binary) for super-page address
- */
-
- lda t0, 0xc01c(zero) /* t0 = ffff ffff ffff c01c */
- sll t0, 28, t0 /* t0 = ffff fc01 c000 0000 */
-
-
- /*
- * Shift In The Port Number To Generate The Port Address We
- * wish to access
- * N.B. - Access Width For VTI Is Always 0 = Byte Access
- */
-
- sll a0, 9, a0 /* a0 << 9 */
- bis t0, a0, t0 /* T0 = Address Of VTI Port */
-
-
- /*
- * Do The Super-Page I/O Access And Return Data To Caller
- */
-
- ldl v0, 0(t0) /* read data from port */
- and v0, 0xff, v0
-
- ret zero, (ra) /* return */
-
- .end inVti