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Annotation of sys/arch/alpha/pci/tsp_bus_mem.c, Revision 1.1

1.1     ! nbrk        1: /* $OpenBSD: tsp_bus_mem.c,v 1.4 2003/09/02 17:25:21 miod Exp $ */
        !             2: /* $NetBSD: tsp_bus_mem.c,v 1.4 2000/06/26 19:46:25 thorpej Exp $ */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by Ross Harvey.
        !            18:  * 4. The name of Ross Harvey may not be used to endorse or promote products
        !            19:  *    derived from this software without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
        !            22:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            23:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
        !            25:  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  */
        !            34:
        !            35: #include <sys/param.h>
        !            36: #include <sys/systm.h>
        !            37: #include <sys/malloc.h>
        !            38: #include <sys/syslog.h>
        !            39: #include <sys/device.h>
        !            40:
        !            41: #include <uvm/uvm_extern.h>
        !            42:
        !            43: #include <machine/bus.h>
        !            44: #include <machine/autoconf.h>
        !            45: #include <machine/rpb.h>
        !            46:
        !            47: #include <alpha/pci/tsreg.h>
        !            48: #include <alpha/pci/tsvar.h>
        !            49:
        !            50: #define tsp_bus_mem() { Generate ctags(1) key. }
        !            51:
        !            52: #define        CHIP    tsp
        !            53:
        !            54: #define        CHIP_EX_MALLOC_SAFE(v)  (((struct tsp_config *)(v))->pc_mallocsafe)
        !            55: #define CHIP_MEM_EXTENT(v)       (((struct tsp_config *)(v))->pc_mem_ex)
        !            56:
        !            57: #define CHIP_MEM_SYS_START(v)    (((struct tsp_config *)(v))->pc_iobase)
        !            58:
        !            59: /*
        !            60:  * Tsunami core logic appears on EV6.  We require at least EV56
        !            61:  * support for the assembler to emit BWX opcodes.
        !            62:  */
        !            63: __asm(".arch ev6");
        !            64:
        !            65: #define        CHIP_EXTENT_NAME(v)     ((struct tsp_config *)(v))->pc_mem_ex_name
        !            66: #define        CHIP_EXTENT_STORAGE(v)  ((struct tsp_config *)(v))->pc_mem_ex_storage
        !            67:
        !            68: #include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
        !            69:
        !            70: void
        !            71: tsp_bus_mem_init2(void *v)
        !            72: {
        !            73:        struct tsp_config *pcp = v;
        !            74:        struct ts_pchip *pccsr = pcp->pc_csr;
        !            75:        int i, error;
        !            76:
        !            77:        /*
        !            78:         * Allocate the DMA windows out of the extent map.
        !            79:         */
        !            80:        for (i = 0; i < 4; i++) {
        !            81:                alpha_mb();
        !            82:                if ((pccsr->tsp_wsba[i].tsg_r & WSBA_ENA) == 0) {
        !            83:                        /* Window not in use. */
        !            84:                        continue;
        !            85:                }
        !            86:
        !            87:                error = extent_alloc_region(CHIP_MEM_EXTENT(v),
        !            88:                    WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
        !            89:                    WSM_LEN(pccsr->tsp_wsm[i].tsg_r),
        !            90:                    EX_NOWAIT | (CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
        !            91:                if (error) {
        !            92:                        printf("WARNING: unable to reserve DMA window "
        !            93:                            "0x%lx - 0x%lx\n",
        !            94:                            WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r),
        !            95:                            WSBA_ADDR(pccsr->tsp_wsba[i].tsg_r) +
        !            96:                            (WSM_LEN(pccsr->tsp_wsm[i].tsg_r) - 1));
        !            97:                }
        !            98:        }
        !            99: }