/* $OpenBSD: pdc.c,v 1.17 2003/08/11 06:51:45 mickey Exp $ */ /* * Copyright (c) 1998 Michael Shalayeff * 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 Michael Shalayeff. * 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. */ /* * Copyright 1996 1995 by Open Software Foundation, Inc. * All Rights Reserved * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies and * that both the copyright notice and this permission notice appear in * supporting documentation. * * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ /* * Copyright (c) 1990 mt Xinu, Inc. All rights reserved. * Copyright (c) 1990 University of Utah. All rights reserved. * * This file may be freely distributed in any form as long as * this copyright notice is included. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Utah $Hdr: pdc.c 1.8 92/03/14$ */ #include #include "libsa.h" #include #include #include #include #include #include #include #include #include "dev_hppa.h" /* * Interface routines to initialize and access the PDC. */ pdcio_t pdc; int pdcbuf[64] PDC_ALIGNMENT;/* PDC return buffer */ struct stable_storage sstor; /* contents of Stable Storage */ int sstorsiz; /* size of Stable Storage */ struct bootdata bd; int bdsize = sizeof(struct bootdata); /* * Initialize PDC and related variables. */ void pdc_init() { int err; /* * Initialize important global variables (defined above). */ pdc = (pdcio_t)PAGE0->mem_pdc; err = (*pdc)(PDC_STABLE, PDC_STABLE_SIZE, pdcbuf, 0, 0); if (err >= 0) { sstorsiz = min(pdcbuf[0],sizeof(sstor)); err = (*pdc)(PDC_STABLE, PDC_STABLE_READ, 0, &sstor, sstorsiz); } /* * Now that we (may) have an output device, if we encountered * an error reading Stable Storage (above), let them know. */ #ifdef DEBUG if (debug && err) printf("Stable storage PDC_STABLE Read Ret'd %d\n", err); #endif /* * Clear the FAULT light (so we know when we get a real one) */ (*pdc)(PDC_CHASSIS, PDC_CHASSIS_DISP, PDC_OSTAT(PDC_OSTAT_BOOT) | 0xCEC0); } /* * Generic READ/WRITE through IODC. Takes pointer to PDC device * information, returns (positive) number of bytes actually read or * the (negative) error condition, or zero if at "EOF". */ int iodcstrategy(devdata, rw, blk, size, buf, rsize) void *devdata; int rw; daddr_t blk; size_t size; void *buf; size_t *rsize; { struct hppa_dev *dp = devdata; struct pz_device *pzdev = dp->pz_dev; int offset, xfer, ret; #ifdef PDCDEBUG if (debug) printf("iodcstrategy(%p, %s, %u, %u, %p, %p)\n", devdata, rw==F_READ? "READ" : "WRITE", blk, size, buf, rsize); if (debug > 1) PZDEV_PRINT(pzdev); #endif blk += dp->fsoff; blk <<= DEV_BSHIFT; if ((pzdev->pz_class & PCL_CLASS_MASK) == PCL_SEQU) { /* rewind and re-read to seek */ if (blk < dp->last_blk) { #ifdef PDCDEBUG if (debug) printf("iodc: rewind "); #endif if ((ret = (pzdev->pz_iodc_io)(pzdev->pz_hpa, IODC_IO_READ, pzdev->pz_spa, pzdev->pz_layers, pdcbuf, 0, dp->buf, 0, 0)) < 0) { #ifdef DEBUG if (debug) printf("IODC_IO: %d\n", ret); #endif return (EIO); } else { dp->last_blk = 0; dp->last_read = 0; } } #ifdef PDCDEBUG if (debug) printf("seek %d ", dp->last_blk); #endif for (; (dp->last_blk + dp->last_read) <= blk; dp->last_read = ret) { twiddle(); dp->last_blk += dp->last_read; if ((ret = (pzdev->pz_iodc_io)(pzdev->pz_hpa, IODC_IO_READ, pzdev->pz_spa, pzdev->pz_layers, pdcbuf, dp->last_blk, dp->buf, IODC_IOSIZ, IODC_IOSIZ)) < 0) { #ifdef DEBUG if (debug) printf("IODC_IO: %d\n", ret); #endif return (EIO); } if ((ret = pdcbuf[0]) == 0) break; #ifdef PDCDEBUG if (debug) printf("-"); #endif } #ifdef PDCDEBUG if (debug) printf("> %d[%d]\n", dp->last_blk, dp->last_read); #endif } xfer = 0; /* see if we can scratch anything from buffer */ if (dp->last_blk <= blk && (dp->last_blk + dp->last_read) > blk) { twiddle(); offset = blk - dp->last_blk; xfer = min(dp->last_read - offset, size); size -= xfer; blk += xfer; #ifdef PDCDEBUG if (debug) printf("off=%d,xfer=%d,size=%d,blk=%d\n", offset, xfer, size, blk); #endif bcopy(dp->buf + offset, buf, xfer); buf += xfer; } /* * double buffer it all the time, to cache */ for (; size; size -= ret, buf += ret, blk += ret, xfer += ret) { offset = blk & IOPGOFSET; if ((ret = (pzdev->pz_iodc_io)(pzdev->pz_hpa, (rw == F_READ? IODC_IO_READ: IODC_IO_WRITE), pzdev->pz_spa, pzdev->pz_layers, pdcbuf, blk - offset, dp->buf, IODC_IOSIZ, IODC_IOSIZ)) < 0) { #ifdef DEBUG if (debug) printf("iodc_read(%d,%d): %d\n", blk - offset, IODC_IOSIZ, ret); #endif if (xfer) break; else return (EIO); } if ((ret = pdcbuf[0]) <= 0) break; dp->last_blk = blk - offset; dp->last_read = ret; if ((ret -= offset) > size) ret = size; bcopy(dp->buf + offset, buf, ret); #ifdef PDCDEBUG if (debug) printf("read %d(%d,%d)@%x ", ret, dp->last_blk, dp->last_read, (u_int)buf); #endif } #ifdef PDCDEBUG if (debug) printf("\n"); #endif if (rsize) *rsize = xfer; return (0); } /* * Find a device with specified unit number * (any if unit == -1), and of specified class (PCL_*). */ struct pz_device * pdc_findev(unit, class) int unit, class; { static struct pz_device pz; int layers[sizeof(pz.pz_layers)/sizeof(pz.pz_layers[0])]; struct iomod *io; iodcio_t iodc; int err = 0; #ifdef PDCDEBUG if (debug) printf("pdc_finddev(%d, %x)\n", unit, class); #endif iodc = (iodcio_t)(PAGE0->mem_free + IODC_MAXSIZE); io = PAGE0->mem_boot.pz_hpa; /* quick hack for boot device */ if (PAGE0->mem_boot.pz_class == class && (unit == -1 || PAGE0->mem_boot.pz_layers[0] == unit)) { bcopy (&PAGE0->mem_boot.pz_dp, &pz.pz_dp, sizeof(pz.pz_dp)); bcopy (pz.pz_layers, layers, sizeof(layers)); if ((err = (pdc)(PDC_IODC, PDC_IODC_READ, pdcbuf, io, IODC_INIT, iodc, IODC_MAXSIZE)) < 0) { #ifdef DEBUG if (debug) printf("IODC_READ: %d\n", err); #endif return NULL; } } else { struct pdc_memmap memmap; struct iodc_data mptr; int i, stp; for (i = 0; i < 0xf; i++) { pz.pz_bc[0] = pz.pz_bc[1] = pz.pz_bc[2] = pz.pz_bc[3] = -1; pz.pz_bc[4] = 2; pz.pz_bc[5] = 0; /* core bus */ pz.pz_mod = i; if ((pdc)(PDC_MEMMAP, PDC_MEMMAP_HPA, &memmap, &pz.pz_dp) < 0) continue; #ifdef PDCDEBUG if (debug) printf("memap: %d.%d.%d, hpa=%x, mpgs=%x\n", pz.pz_bc[4], pz.pz_bc[5], pz.pz_mod, memmap.hpa, memmap.morepages); #endif io = (struct iomod *) memmap.hpa; if ((err = (pdc)(PDC_IODC, PDC_IODC_READ, &pdcbuf, io, IODC_DATA, &mptr, sizeof(mptr))) < 0) { #ifdef DEBUG if (debug) printf("IODC_DATA: %d\n", err); #endif continue; } if ((err = (pdc)(PDC_IODC, PDC_IODC_READ, pdcbuf, io, IODC_INIT, iodc, IODC_MAXSIZE)) < 0) { #ifdef DEBUG if (debug) printf("IODC_READ: %d\n", err); #endif continue; } stp = IODC_INIT_FIRST; do { if ((err = (iodc)(io, stp, io->io_spa, layers, pdcbuf, 0, 0, 0, 0)) < 0) { #ifdef DEBUG if (debug && err != PDC_ERR_EOD) printf("IODC_INIT_%s: %d\n", stp==IODC_INIT_FIRST? "FIRST":"NEXT", err); #endif break; } #ifdef PDCDEBUG if (debug) printf("[%x,%x,%x,%x,%x,%x], " "[%x,%x,%x,%x,%x,%x]\n", pdcbuf[0], pdcbuf[1], pdcbuf[2], pdcbuf[3], pdcbuf[4], pdcbuf[5], layers[0], layers[1], layers[2], layers[3], layers[4], layers[5]); #endif stp = IODC_INIT_NEXT; } while (pdcbuf[1] != class && unit != -1 && unit != layers[0]); if (err >= 0) break; } } if (err >= 0) { /* init device */ if (0 && (err = (iodc)(io, IODC_INIT_DEV, io->io_spa, layers, pdcbuf, 0, 0, 0, 0)) < 0) { #ifdef DEBUG if (debug) printf("INIT_DEV: %d\n", err); #endif return NULL; } /* read i/o entry code */ if ((err = (pdc)(PDC_IODC, PDC_IODC_READ, pdcbuf, io, IODC_IO, iodc, IODC_MAXSIZE)) < 0) { #ifdef DEBUG if (debug) printf("IODC_READ: %d\n", err); #endif return NULL; } pz.pz_flags = 0; bcopy(layers, pz.pz_layers, sizeof(pz.pz_layers)); pz.pz_hpa = io; /* XXX pz.pz_spa = io->io_spa; */ pz.pz_iodc_io = iodc; pz.pz_class = class; return &pz; } return NULL; } static __inline void fall(int c_base, int c_count, int c_loop, int c_stride, int data) { int loop; /* Internal vars */ for (; c_count--; c_base += c_stride) for (loop = c_loop; loop--; ) if (data) fdce(0, c_base); else fice(0, c_base); } /* * fcacheall - Flush all caches. * * This routine is just a wrapper around the real cache flush routine. */ struct pdc_cache pdc_cacheinfo PDC_ALIGNMENT; void fcacheall() { int err; if ((err = (*pdc)(PDC_CACHE, PDC_CACHE_DFLT, &pdc_cacheinfo)) < 0) { #ifdef DEBUG if (debug) printf("fcacheall: PDC_CACHE failed (%d).\n", err); #endif return; } #if PDCDEBUG if (debug) printf("pdc_cache:\nic={%u,%x,%x,%u,%u,%u}\n" "dc={%u,%x,%x,%u,%u,%u}\n", pdc_cacheinfo.ic_size, *(u_int *)&pdc_cacheinfo.ic_conf, pdc_cacheinfo.ic_base, pdc_cacheinfo.ic_stride, pdc_cacheinfo.ic_count, pdc_cacheinfo.ic_loop, pdc_cacheinfo.dc_size, *(u_int *)&pdc_cacheinfo.ic_conf, pdc_cacheinfo.dc_base, pdc_cacheinfo.dc_stride, pdc_cacheinfo.dc_count, pdc_cacheinfo.dc_loop); #endif /* * Flush the instruction, then data cache. */ fall(pdc_cacheinfo.ic_base, pdc_cacheinfo.ic_count, pdc_cacheinfo.ic_loop, pdc_cacheinfo.ic_stride, 0); sync_caches(); fall(pdc_cacheinfo.dc_base, pdc_cacheinfo.dc_count, pdc_cacheinfo.dc_loop, pdc_cacheinfo.dc_stride, 1); sync_caches(); }