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Annotation of sys/arch/sparc/sparc/iommureg.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: iommureg.h,v 1.6 1998/05/10 21:11:53 art Exp $        */
                      2: /*     $NetBSD: iommureg.h,v 1.5 1998/05/04 23:16:59 pk Exp $  */
                      3:
                      4: /*
                      5:  * Copyright (c) 1996
                      6:  *     The President and Fellows of Harvard College. All rights reserved.
                      7:  * Copyright (c) 1995  Paul Kranenburg
                      8:  *
                      9:  * Redistribution and use in source and binary forms, with or without
                     10:  * modification, are permitted provided that the following conditions
                     11:  * are met:
                     12:  * 1. Redistributions of source code must retain the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer.
                     14:  * 2. Redistributions in binary form must reproduce the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer in the
                     16:  *    documentation and/or other materials provided with the distribution.
                     17:  * 3. All advertising materials mentioning features or use of this software
                     18:  *    must display the following acknowledgement:
                     19:  *     This product includes software developed by Aaron Brown and
                     20:  *     Harvard University.
                     21:  *     This product includes software developed by Paul Kranenburg.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
                     38:  */
                     39:
                     40: struct iommureg {
                     41:        u_int32_t       io_cr;          /* IOMMU control register */
                     42:        u_int32_t       io_bar;         /* IOMMU PTE base register */
                     43:        u_int32_t       io_fill1[3];
                     44:        u_int32_t       io_flashclear;  /* Flush all TLB entries */
                     45:        u_int32_t       io_flushpage;   /* Flush page from TLB */
                     46: };
                     47:
                     48: #define IOMMU_CTL_IMPL         0xf0000000
                     49: #define IOMMU_CTL_VER          0x0f000000
                     50: #define IOMMU_CTL_RSVD1                0x00ffffe0
                     51: #define IOMMU_CTL_RANGE                0x0000001c
                     52: #define IOMMU_CTL_RANGESHFT    2
                     53: #define IOMMU_CTL_RSVD2                0x00000002
                     54: #define IOMMU_CTL_ME           0x00000001
                     55:
                     56: #define IOMMU_BAR_IBA          0xfffffc00
                     57: #define IOMMU_BAR_IBASHFT      10
                     58:
                     59: /* Flushpage fields */
                     60: #define IOMMU_FLPG_VADDR       0xfffff000
                     61: #define IOMMU_FLUSH_MASK       0xfffff000
                     62:
                     63: /*
                     64:  * A few empty cycles after touching the IOMMU registers seems to
                     65:  * avoid utter lossage on some machines (SS4s & SS5s) where our caller
                     66:  * would see some of its local (`%lx') registers trashed.
                     67:  */
                     68: #define IOMMU_FLUSHPAGE(sc, va)        do {                            \
                     69:        (sc)->sc_reg->io_flushpage = (va) & IOMMU_FLUSH_MASK;   \
                     70:        __asm("nop;nop;nop;");                                  \
                     71: } while (0);
                     72: #define IOMMU_FLUSHALL(sc)     do {                            \
                     73:        (sc)->sc_reg->io_flashclear = 0;                        \
                     74:        __asm("nop;nop;nop;");                                  \
                     75: } while (0)
                     76:
                     77: /* to pte.h ? */
                     78: typedef u_int32_t iopte_t;
                     79:
                     80: #define IOPTE_PPN      0xffffff00      /* PA<35:12> */
                     81: #define IOPTE_C                0x00000080      /* cacheable */
                     82: #define IOPTE_W                0x00000004      /* writeable */
                     83: #define IOPTE_V                0x00000002      /* valid */
                     84: #define IOPTE_WAZ      0x00000001      /* must write as zero */
                     85:
                     86: #define IOPTE_PPNSHFT  8               /* shift to get ppn from IOPTE */
                     87: #define IOPTE_PPNPASHFT        4               /* shift to get pa from ioppn */
                     88:
                     89: #define IOPTE_BITS "\20\10C\3W\2V\1WAZ"
                     90: