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[src/netbsd-1-4]: src/sys/arch/sun3/sun3x Add the address of the DMA gate arr...
details: https://anonhg.NetBSD.org/src/rev/3fa8afaa3b38
branches: netbsd-1-4
changeset: 468078:3fa8afaa3b38
user: gwr <gwr%NetBSD.org@localhost>
date: Tue Apr 06 02:07:52 1999 +0000
description:
Add the address of the DMA gate array (used by the esp driver).
diffstat:
sys/arch/sun3/sun3x/obio.c | 346 +++++++++++++++++++++++++++++++++++++++++++++
sys/arch/sun3/sun3x/obio.h | 95 ++++++++++++
2 files changed, 441 insertions(+), 0 deletions(-)
diffs (truncated from 449 to 300 lines):
diff -r d6c56efde274 -r 3fa8afaa3b38 sys/arch/sun3/sun3x/obio.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/sun3/sun3x/obio.c Tue Apr 06 02:07:52 1999 +0000
@@ -0,0 +1,346 @@
+/* $NetBSD: obio.c,v 1.11.2.2 1999/04/06 02:07:52 gwr Exp $ */
+
+/*-
+ * Copyright (c) 1996 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Adam Glass and Gordon W. Ross.
+ *
+ * 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 the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/autoconf.h>
+#include <machine/mon.h>
+#include <machine/pte.h>
+
+#include <sun3/sun3/machdep.h>
+#include <sun3/sun3x/obio.h>
+
+static int obio_match __P((struct device *, struct cfdata *, void *));
+static void obio_attach __P((struct device *, struct device *, void *));
+static int obio_print __P((void *, const char *parentname));
+static int obio_submatch __P((struct device *, struct cfdata *, void *));
+
+struct cfattach obio_ca = {
+ sizeof(struct device), obio_match, obio_attach
+};
+
+static int
+obio_match(parent, cf, aux)
+ struct device *parent;
+ struct cfdata *cf;
+ void *aux;
+{
+ struct confargs *ca = aux;
+
+ if (ca->ca_bustype != BUS_OBIO)
+ return (0);
+ return(1);
+}
+
+/*
+ * We need control over the order of attachment on OBIO,
+ * so do "direct" style autoconfiguration with addresses
+ * from the list below. OBIO addresses are fixed forever.
+ *
+ * Warning: This whole list is very carefully ordered!
+ * In general, anything not already shown here should
+ * be added at or near the end.
+ */
+static int obio_alist[] = {
+
+ /* This is used by the Ethernet and SCSI drivers. */
+ OBIO_IOMMU,
+
+ /* Misc. registers - needed by many things */
+ OBIO_ENABLEREG,
+ OBIO_BUSERRREG,
+ OBIO_DIAGREG, /* leds.c */
+ OBIO_IDPROM1, /* idprom.c (3/470) */
+ OBIO_MEMREG, /* memerr.c */
+ OBIO_INTERREG, /* intreg.c */
+
+ /* Zilog UARTs */
+ OBIO_ZS_KBD_MS,
+ OBIO_ZS_TTY_AB,
+
+ /* eeprom.c */
+ OBIO_EEPROM,
+
+ /* Note: This must come after OBIO_IDPROM1. */
+ OBIO_IDPROM2, /* idprom.c (3/80) */
+
+ /* Note: Must probe for the Intersil first! */
+ OBIO_CLOCK1, /* clock.c (3/470) */
+ OBIO_CLOCK2, /* clock.c (3/80) */
+
+ OBIO_INTEL_ETHER,
+ OBIO_LANCE_ETHER,
+
+ /* Need esp DMA before SCSI. */
+ OBIO_EMULEX_DMA, /* 3/80 only */
+ OBIO_EMULEX_SCSI, /* 3/80 only */
+
+ /* Memory subsystem */
+ OBIO_PCACHE_TAGS,
+ OBIO_ECCPARREG,
+ OBIO_IOC_TAGS,
+ OBIO_IOC_FLUSH,
+
+ OBIO_FDC, /* floppy disk (3/80) */
+ OBIO_PRINTER_PORT, /* printer port (3/80 */
+};
+#define OBIO_ALIST_LEN (sizeof(obio_alist) / \
+ sizeof(obio_alist[0]))
+
+static void
+obio_attach(parent, self, aux)
+ struct device *parent;
+ struct device *self;
+ void *aux;
+{
+ struct confargs *ca = aux;
+ int i;
+
+ printf("\n");
+
+ /* Configure these in the order listed above. */
+ for (i = 0; i < OBIO_ALIST_LEN; i++) {
+ /* Our parent set ca->ca_bustype already. */
+ ca->ca_paddr = obio_alist[i];
+ /* These are filled-in by obio_submatch. */
+ ca->ca_intpri = -1;
+ ca->ca_intvec = -1;
+ (void) config_found_sm(self, ca, obio_print, obio_submatch);
+ }
+}
+
+/*
+ * Print out the confargs. The (parent) name is non-NULL
+ * when there was no match found by config_found().
+ */
+static int
+obio_print(args, name)
+ void *args;
+ const char *name;
+{
+
+ /* Be quiet about empty OBIO locations. */
+ if (name)
+ return(QUIET);
+
+ /* Otherwise do the usual. */
+ return(bus_print(args, name));
+}
+
+int
+obio_submatch(parent, cf, aux)
+ struct device *parent;
+ struct cfdata *cf;
+ void *aux;
+{
+ struct confargs *ca = aux;
+ cfmatch_t submatch;
+
+ /*
+ * Note that a defaulted address locator can never match
+ * the value of ca->ca_paddr set by the obio_attach loop.
+ * Without this diagnostic, any device with a defaulted
+ * address locator would always be silently unmatched.
+ * Therefore, just disallow default addresses on OBIO.
+ */
+#ifdef DIAGNOSTIC
+ if (cf->cf_paddr == -1)
+ panic("obio_submatch: invalid address for: %s%d\n",
+ cf->cf_driver->cd_name, cf->cf_unit);
+#endif
+
+ /*
+ * Note that obio_attach calls config_found_sm() with
+ * this function as the "submatch" and ca->ca_paddr
+ * set to each of the possible OBIO locations, so we
+ * want to reject any unmatched address here.
+ */
+ if (cf->cf_paddr != ca->ca_paddr)
+ return 0;
+
+ /*
+ * Copy the locators into our confargs for the child.
+ * Note: ca->ca_bustype was set by our parent driver
+ * (mainbus) and ca->ca_paddr was set by obio_attach.
+ */
+ ca->ca_intpri = cf->cf_intpri;
+ ca->ca_intvec = cf->cf_intvec;
+
+ /* Now call the match function of the potential child. */
+ submatch = cf->cf_attach->ca_match;
+ if (submatch == NULL)
+ panic("obio_submatch: no match function for: %s\n",
+ cf->cf_driver->cd_name);
+
+ return ((*submatch)(parent, cf, aux));
+}
+
+
+/*****************************************************************/
+
+/*
+ * This is our record of "interesting" OBIO mappings that
+ * the PROM has left in the virtual space reserved for it.
+ * Each row of the array holds a virtual address and the
+ * physical address it maps to (if found).
+ */
+static struct prom_map {
+ vm_offset_t pa, va;
+} prom_mappings[] = {
+ { OBIO_ENABLEREG, 0 }, /* regs: Sys ENA, Bus ERR, etc. */
+ { OBIO_ZS_KBD_MS, 0 }, /* Keyboard and Mouse */
+ { OBIO_ZS_TTY_AB, 0 }, /* Serial Ports */
+ { OBIO_EEPROM, 0 }, /* EEPROM/IDPROM/clock */
+};
+#define PROM_MAP_CNT (sizeof(prom_mappings) / \
+ sizeof(prom_mappings[0]))
+
+/*
+ * Find a virtual address for a device at physical address 'pa'.
+ * If one is found among the mappings already made by the PROM
+ * at power-up time, use it. Otherwise return 0 as a sign that
+ * a mapping will have to be created.
+ */
+caddr_t
+obio_find_mapping(int pa, int sz)
+{
+ int i, off;
+
+ off = pa & PGOFSET;
+ pa -= off;
+ sz += off;
+
+ /* The saved mappings are all one page long. */
+ if (sz > NBPG)
+ return (caddr_t)0;
+
+ /* Linear search for it. The list is short. */
+ for (i = 0; i < PROM_MAP_CNT; i++) {
+ if (pa == prom_mappings[i].pa) {
+ return ((caddr_t)(prom_mappings[i].va + off));
+ }
+ }
+ return (caddr_t)0;
+}
+
+/*
+ * Search the PROM page tables for OBIO mappings that
+ * we would like to borrow.
+ */
+static void
+save_prom_mappings __P((void))
+{
+ int *mon_pte;
+ vm_offset_t va, pa;
+ int i;
+
+ /* Note: mon_ctbl[0] maps SUN3X_MON_KDB_BASE */
+ mon_pte = *romVectorPtr->monptaddr;
+
+ for (va = SUN3X_MON_KDB_BASE; va < SUN3X_MONEND;
+ va += NBPG, mon_pte++)
+ {
+ /* Is this a valid mapping to OBIO? */
+ /* XXX - Some macros would be nice... */
+ if ((*mon_pte & 0xF0000003) != 0x60000001)
+ continue;
+
+ /* Yes it is. Is this a mapping we want? */
+ pa = *mon_pte & MMU_SHORT_PTE_BASEADDR;
+ for (i = 0; i < PROM_MAP_CNT; i++) {
+ if (pa != prom_mappings[i].pa)
+ continue;
+ /* Yes, we want it. Save the va? */
+ if (prom_mappings[i].va == 0) {
+ prom_mappings[i].va = va;
+ }
+ }
+ }
+
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