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Annotation of sys/arch/alpha/pci/tsp_bus_mem.c, Revision 1.1.1.1

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: }