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intio.c revision 1.32
      1  1.32     isaki /*	$NetBSD: intio.c,v 1.32 2007/05/12 06:31:18 isaki Exp $	*/
      2   1.2   minoura 
      3   1.7   minoura /*-
      4   1.2   minoura  * Copyright (c) 1998 NetBSD Foundation, Inc.
      5   1.2   minoura  * All rights reserved.
      6   1.2   minoura  *
      7   1.2   minoura  * Redistribution and use in source and binary forms, with or without
      8   1.2   minoura  * modification, are permitted provided that the following conditions
      9   1.2   minoura  * are met:
     10   1.2   minoura  * 1. Redistributions of source code must retain the above copyright
     11   1.2   minoura  *    notice, this list of conditions and the following disclaimer.
     12   1.2   minoura  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.2   minoura  *    notice, this list of conditions and the following disclaimer in the
     14   1.2   minoura  *    documentation and/or other materials provided with the distribution.
     15   1.2   minoura  * 3. All advertising materials mentioning features or use of this software
     16   1.2   minoura  *    must display the following acknowledgement:
     17   1.7   minoura  *        This product includes software developed by the NetBSD
     18   1.7   minoura  *        Foundation, Inc. and its contributors.
     19   1.7   minoura  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20   1.7   minoura  *    contributors may be used to endorse or promote products derived
     21   1.7   minoura  *    from this software without specific prior written permission.
     22   1.2   minoura  *
     23   1.7   minoura  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24   1.7   minoura  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25   1.7   minoura  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26   1.7   minoura  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27   1.7   minoura  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28   1.7   minoura  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29   1.7   minoura  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30   1.7   minoura  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31   1.7   minoura  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32   1.7   minoura  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33   1.7   minoura  * POSSIBILITY OF SUCH DAMAGE.
     34   1.2   minoura  */
     35   1.2   minoura 
     36   1.2   minoura /*
     37   1.2   minoura  * NetBSD/x68k internal I/O virtual bus.
     38   1.2   minoura  */
     39  1.20     lukem 
     40  1.20     lukem #include <sys/cdefs.h>
     41  1.32     isaki __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.32 2007/05/12 06:31:18 isaki Exp $");
     42   1.2   minoura 
     43   1.2   minoura #include <sys/param.h>
     44   1.2   minoura #include <sys/systm.h>
     45   1.2   minoura #include <sys/device.h>
     46   1.2   minoura #include <sys/malloc.h>
     47   1.2   minoura #include <sys/mbuf.h>
     48   1.2   minoura #include <sys/extent.h>
     49   1.9       mrg #include <uvm/uvm_extern.h>
     50   1.2   minoura 
     51   1.2   minoura #include <machine/bus.h>
     52   1.2   minoura #include <machine/cpu.h>
     53   1.2   minoura #include <machine/frame.h>
     54   1.2   minoura 
     55   1.2   minoura #include <arch/x68k/dev/intiovar.h>
     56   1.2   minoura #include <arch/x68k/dev/mfp.h>
     57   1.2   minoura 
     58   1.2   minoura 
     59   1.2   minoura /*
     60   1.2   minoura  * bus_space(9) interface
     61   1.2   minoura  */
     62  1.25       chs static int intio_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *);
     63  1.25       chs static void intio_bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t);
     64  1.25       chs static int intio_bus_space_subregion(bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *);
     65   1.2   minoura 
     66   1.2   minoura static struct x68k_bus_space intio_bus = {
     67   1.2   minoura #if 0
     68   1.2   minoura 	X68K_INTIO_BUS,
     69   1.2   minoura #endif
     70   1.2   minoura 	intio_bus_space_map, intio_bus_space_unmap, intio_bus_space_subregion,
     71   1.2   minoura 	x68k_bus_space_alloc, x68k_bus_space_free,
     72   1.2   minoura #if 0
     73   1.2   minoura 	x68k_bus_space_barrier,
     74   1.2   minoura #endif
     75   1.2   minoura 
     76   1.2   minoura 	0
     77   1.2   minoura };
     78   1.2   minoura 
     79   1.2   minoura /*
     80   1.2   minoura  * bus_dma(9) interface
     81   1.2   minoura  */
     82   1.2   minoura #define	INTIO_DMA_BOUNCE_THRESHOLD	(16 * 1024 * 1024)
     83  1.25       chs int	_intio_bus_dmamap_create(bus_dma_tag_t, bus_size_t, int,
     84  1.25       chs 	    bus_size_t, bus_size_t, int, bus_dmamap_t *);
     85  1.25       chs void	_intio_bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
     86  1.25       chs int	_intio_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
     87  1.25       chs 	    bus_size_t, struct proc *, int);
     88  1.25       chs int	_intio_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
     89  1.25       chs 	    struct mbuf *, int);
     90  1.25       chs int	_intio_bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t,
     91  1.25       chs 	    struct uio *, int);
     92  1.25       chs int	_intio_bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
     93  1.25       chs 	    bus_dma_segment_t *, int, bus_size_t, int);
     94  1.25       chs void	_intio_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
     95  1.25       chs void	_intio_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t,
     96  1.25       chs 	    bus_addr_t, bus_size_t, int);
     97  1.25       chs 
     98  1.25       chs int	_intio_bus_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t,
     99  1.25       chs 	    bus_size_t, bus_dma_segment_t *, int, int *, int);
    100  1.25       chs 
    101  1.25       chs int	_intio_dma_alloc_bouncebuf(bus_dma_tag_t, bus_dmamap_t,
    102  1.25       chs 	    bus_size_t, int);
    103  1.25       chs void	_intio_dma_free_bouncebuf(bus_dma_tag_t, bus_dmamap_t);
    104   1.2   minoura 
    105   1.2   minoura struct x68k_bus_dma intio_bus_dma = {
    106   1.2   minoura 	INTIO_DMA_BOUNCE_THRESHOLD,
    107   1.2   minoura 	_intio_bus_dmamap_create,
    108   1.2   minoura 	_intio_bus_dmamap_destroy,
    109   1.2   minoura 	_intio_bus_dmamap_load,
    110   1.2   minoura 	_intio_bus_dmamap_load_mbuf,
    111   1.2   minoura 	_intio_bus_dmamap_load_uio,
    112   1.2   minoura 	_intio_bus_dmamap_load_raw,
    113   1.2   minoura 	_intio_bus_dmamap_unload,
    114   1.2   minoura 	_intio_bus_dmamap_sync,
    115   1.2   minoura 	_intio_bus_dmamem_alloc,
    116   1.2   minoura 	x68k_bus_dmamem_free,
    117   1.2   minoura 	x68k_bus_dmamem_map,
    118   1.2   minoura 	x68k_bus_dmamem_unmap,
    119   1.2   minoura 	x68k_bus_dmamem_mmap,
    120   1.2   minoura };
    121   1.2   minoura 
    122   1.2   minoura /*
    123   1.2   minoura  * autoconf stuff
    124   1.2   minoura  */
    125  1.25       chs static int intio_match(struct device *, struct cfdata *, void *);
    126  1.25       chs static void intio_attach(struct device *, struct device *, void *);
    127  1.26  drochner static int intio_search(struct device *, struct cfdata *cf,
    128  1.27  drochner 			const int *, void *);
    129  1.25       chs static int intio_print(void *, const char *);
    130  1.25       chs static void intio_alloc_system_ports(struct intio_softc*);
    131   1.2   minoura 
    132  1.15   thorpej CFATTACH_DECL(intio, sizeof(struct intio_softc),
    133  1.16   thorpej     intio_match, intio_attach, NULL, NULL);
    134   1.2   minoura 
    135  1.24       chs extern struct cfdriver intio_cd;
    136  1.24       chs 
    137  1.24       chs static int intio_attached;
    138  1.24       chs 
    139   1.2   minoura static struct intio_interrupt_vector {
    140   1.2   minoura 	intio_intr_handler_t	iiv_handler;
    141   1.2   minoura 	void			*iiv_arg;
    142   1.2   minoura 	int			iiv_intrcntoff;
    143   1.5   minoura } iiv[256] = {{0,},};
    144   1.2   minoura 
    145   1.2   minoura /* used in console initialization */
    146   1.2   minoura extern int x68k_realconfig;
    147  1.25       chs int x68k_config_found(struct cfdata *, struct device *, void *, cfprint_t);
    148   1.2   minoura static struct cfdata *cfdata_intiobus = NULL;
    149   1.2   minoura 
    150   1.2   minoura /* other static functions */
    151  1.25       chs static int scan_intrnames(const char *);
    152   1.4   minoura #ifdef DEBUG
    153   1.4   minoura int intio_debug = 0;
    154   1.4   minoura #endif
    155   1.2   minoura 
    156   1.2   minoura static int
    157  1.25       chs intio_match(struct device *parent, struct cfdata *cf, void *aux)
    158   1.2   minoura {
    159  1.25       chs 
    160   1.2   minoura 	if (strcmp(aux, intio_cd.cd_name) != 0)
    161   1.2   minoura 		return (0);
    162  1.24       chs 	if (intio_attached)
    163   1.2   minoura 		return (0);
    164   1.2   minoura 	if (x68k_realconfig == 0)
    165   1.2   minoura 		cfdata_intiobus = cf; /* XXX */
    166   1.2   minoura 
    167   1.2   minoura 	return (1);
    168   1.2   minoura }
    169   1.2   minoura 
    170   1.2   minoura 
    171   1.2   minoura /* used in console initialization: configure only MFP */
    172   1.2   minoura static struct intio_attach_args initial_ia = {
    173   1.2   minoura 	&intio_bus,
    174   1.2   minoura 	0/*XXX*/,
    175   1.2   minoura 
    176   1.2   minoura 	"mfp",			/* ia_name */
    177   1.2   minoura 	MFP_ADDR,		/* ia_addr */
    178   1.6   minoura 	0x30,			/* ia_size */
    179   1.2   minoura 	MFP_INTR,		/* ia_intr */
    180   1.2   minoura 	-1			/* ia_dma */
    181   1.2   minoura 	-1,			/* ia_dmaintr */
    182   1.2   minoura };
    183   1.2   minoura 
    184   1.2   minoura static void
    185  1.25       chs intio_attach(struct device *parent, struct device *self, void *aux)
    186   1.2   minoura {
    187   1.2   minoura 	struct intio_softc *sc = (struct intio_softc *)self;
    188   1.2   minoura 	struct intio_attach_args ia;
    189   1.2   minoura 
    190   1.2   minoura 	if (self == NULL) {
    191   1.2   minoura 		/* console only init */
    192   1.2   minoura 		x68k_config_found(cfdata_intiobus, NULL, &initial_ia, NULL);
    193   1.2   minoura 		return;
    194   1.2   minoura 	}
    195   1.2   minoura 
    196  1.24       chs 	intio_attached = 1;
    197  1.24       chs 
    198  1.31     isaki 	printf(" mapped at %8p\n", intiobase);
    199   1.2   minoura 
    200   1.2   minoura 	sc->sc_map = extent_create("intiomap",
    201   1.2   minoura 				  PHYS_INTIODEV,
    202   1.2   minoura 				  PHYS_INTIODEV + 0x400000,
    203  1.22  jdolecek 				  M_DEVBUF, NULL, 0, EX_NOWAIT);
    204  1.25       chs 	intio_alloc_system_ports(sc);
    205   1.2   minoura 
    206   1.2   minoura 	sc->sc_bst = &intio_bus;
    207   1.2   minoura 	sc->sc_bst->x68k_bus_device = self;
    208   1.2   minoura 	sc->sc_dmat = &intio_bus_dma;
    209   1.2   minoura 	sc->sc_dmac = 0;
    210   1.2   minoura 
    211  1.31     isaki 	memset(iiv, 0, sizeof(struct intio_interrupt_vector) * 256);
    212   1.2   minoura 
    213   1.2   minoura 	ia.ia_bst = sc->sc_bst;
    214   1.2   minoura 	ia.ia_dmat = sc->sc_dmat;
    215   1.2   minoura 
    216  1.26  drochner 	config_search_ia(intio_search, self, "intio", &ia);
    217   1.2   minoura }
    218   1.2   minoura 
    219   1.2   minoura static int
    220  1.26  drochner intio_search(struct device *parent, struct cfdata *cf,
    221  1.27  drochner 	     const int *ldesc, void *aux)
    222   1.2   minoura {
    223   1.2   minoura 	struct intio_attach_args *ia = aux;
    224   1.2   minoura 	struct intio_softc *sc = (struct intio_softc *)parent;
    225   1.2   minoura 
    226   1.2   minoura 	ia->ia_bst = sc->sc_bst;
    227   1.2   minoura 	ia->ia_dmat = sc->sc_dmat;
    228  1.12   thorpej 	ia->ia_name = cf->cf_name;
    229   1.2   minoura 	ia->ia_addr = cf->cf_addr;
    230   1.2   minoura 	ia->ia_intr = cf->cf_intr;
    231   1.2   minoura 	ia->ia_dma = cf->cf_dma;
    232   1.2   minoura 	ia->ia_dmaintr = cf->cf_dmaintr;
    233   1.2   minoura 
    234  1.13   thorpej 	if (config_match(parent, cf, ia) > 0)
    235   1.2   minoura 		config_attach(parent, cf, ia, intio_print);
    236   1.2   minoura 
    237   1.2   minoura 	return (0);
    238   1.2   minoura }
    239   1.2   minoura 
    240   1.2   minoura static int
    241  1.25       chs intio_print(void *aux, const char *name)
    242   1.2   minoura {
    243   1.2   minoura 	struct intio_attach_args *ia = aux;
    244   1.2   minoura 
    245   1.2   minoura /*	if (ia->ia_addr > 0)	*/
    246  1.31     isaki 		aprint_normal(" addr 0x%06x", ia->ia_addr);
    247   1.2   minoura 	if (ia->ia_intr > 0)
    248  1.31     isaki 		aprint_normal(" intr 0x%02x", ia->ia_intr);
    249   1.2   minoura 	if (ia->ia_dma >= 0) {
    250  1.31     isaki 		aprint_normal(" using DMA ch%d", ia->ia_dma);
    251   1.2   minoura 		if (ia->ia_dmaintr > 0)
    252  1.31     isaki 			aprint_normal(" intr 0x%02x and 0x%02x",
    253   1.2   minoura 				ia->ia_dmaintr, ia->ia_dmaintr+1);
    254   1.2   minoura 	}
    255   1.2   minoura 
    256   1.2   minoura 	return (QUIET);
    257   1.2   minoura }
    258   1.2   minoura 
    259   1.2   minoura /*
    260   1.2   minoura  * intio memory map manager
    261   1.2   minoura  */
    262   1.2   minoura 
    263   1.2   minoura int
    264  1.25       chs intio_map_allocate_region(struct device *parent, struct intio_attach_args *ia,
    265  1.25       chs     enum intio_map_flag flag)
    266   1.2   minoura {
    267  1.25       chs 	struct intio_softc *sc = (struct intio_softc *)parent;
    268   1.2   minoura 	struct extent *map = sc->sc_map;
    269   1.2   minoura 	int r;
    270   1.2   minoura 
    271  1.31     isaki 	r = extent_alloc_region(map, ia->ia_addr, ia->ia_size, 0);
    272   1.2   minoura #ifdef DEBUG
    273   1.4   minoura 	if (intio_debug)
    274  1.31     isaki 		extent_print(map);
    275   1.2   minoura #endif
    276   1.2   minoura 	if (r == 0) {
    277   1.2   minoura 		if (flag != INTIO_MAP_ALLOCATE)
    278  1.31     isaki 		extent_free(map, ia->ia_addr, ia->ia_size, 0);
    279   1.2   minoura 		return 0;
    280  1.32     isaki 	}
    281   1.2   minoura 
    282   1.2   minoura 	return -1;
    283   1.2   minoura }
    284   1.2   minoura 
    285   1.2   minoura int
    286  1.25       chs intio_map_free_region(struct device *parent, struct intio_attach_args *ia)
    287   1.2   minoura {
    288   1.2   minoura 	struct intio_softc *sc = (struct intio_softc*) parent;
    289   1.2   minoura 	struct extent *map = sc->sc_map;
    290   1.2   minoura 
    291  1.31     isaki 	extent_free(map, ia->ia_addr, ia->ia_size, 0);
    292   1.2   minoura #ifdef DEBUG
    293   1.4   minoura 	if (intio_debug)
    294  1.31     isaki 		extent_print(map);
    295   1.2   minoura #endif
    296   1.2   minoura 	return 0;
    297   1.2   minoura }
    298   1.2   minoura 
    299   1.2   minoura void
    300  1.25       chs intio_alloc_system_ports(struct intio_softc *sc)
    301   1.2   minoura {
    302  1.31     isaki 	extent_alloc_region(sc->sc_map, INTIO_SYSPORT, 16, 0);
    303  1.31     isaki 	extent_alloc_region(sc->sc_map, INTIO_SICILIAN, 0x2000, 0);
    304   1.2   minoura }
    305   1.2   minoura 
    306   1.2   minoura 
    307   1.2   minoura /*
    308   1.2   minoura  * intio bus space stuff.
    309   1.2   minoura  */
    310   1.2   minoura static int
    311  1.25       chs intio_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size,
    312  1.25       chs     int flags, bus_space_handle_t *bshp)
    313   1.2   minoura {
    314   1.2   minoura 	/*
    315   1.2   minoura 	 * Intio bus is mapped permanently.
    316   1.2   minoura 	 */
    317   1.2   minoura 	*bshp = (bus_space_handle_t)
    318   1.2   minoura 	  ((u_int) bpa - PHYS_INTIODEV + intiobase);
    319   1.2   minoura 	/*
    320  1.10     isaki 	 * Some devices are mapped on odd or even addresses only.
    321   1.2   minoura 	 */
    322  1.10     isaki 	if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_ODD)
    323   1.2   minoura 		*bshp += 0x80000001;
    324  1.10     isaki 	if ((flags & BUS_SPACE_MAP_SHIFTED_MASK) == BUS_SPACE_MAP_SHIFTED_EVEN)
    325  1.10     isaki 		*bshp += 0x80000000;
    326   1.2   minoura 
    327   1.2   minoura 	return (0);
    328   1.2   minoura }
    329   1.2   minoura 
    330   1.2   minoura static void
    331  1.25       chs intio_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
    332  1.25       chs     bus_size_t size)
    333   1.2   minoura {
    334   1.2   minoura 	return;
    335   1.2   minoura }
    336   1.2   minoura 
    337   1.2   minoura static int
    338  1.25       chs intio_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
    339  1.25       chs     bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
    340   1.2   minoura {
    341   1.2   minoura 
    342   1.2   minoura 	*nbshp = bsh + offset;
    343   1.2   minoura 	return (0);
    344   1.2   minoura }
    345   1.2   minoura 
    346   1.2   minoura 
    347   1.2   minoura /*
    348   1.2   minoura  * interrupt handler
    349   1.2   minoura  */
    350   1.2   minoura int
    351  1.25       chs intio_intr_establish(int vector, const char *name, intio_intr_handler_t handler,
    352  1.25       chs     void *arg)
    353   1.2   minoura {
    354   1.2   minoura 	if (vector < 16)
    355  1.31     isaki 		panic("Invalid interrupt vector");
    356   1.2   minoura 	if (iiv[vector].iiv_handler)
    357   1.2   minoura 		return EBUSY;
    358   1.2   minoura 	iiv[vector].iiv_handler = handler;
    359   1.2   minoura 	iiv[vector].iiv_arg = arg;
    360   1.2   minoura 	iiv[vector].iiv_intrcntoff = scan_intrnames(name);
    361   1.2   minoura 
    362   1.2   minoura 	return 0;
    363   1.2   minoura }
    364   1.2   minoura 
    365   1.2   minoura static int
    366  1.25       chs scan_intrnames(const char *name)
    367   1.2   minoura {
    368   1.2   minoura 	extern char intrnames[];
    369   1.2   minoura 	extern char eintrnames[];
    370   1.2   minoura 	int r = 0;
    371   1.2   minoura 	char *p = &intrnames[0];
    372   1.2   minoura 
    373   1.2   minoura 	for (;;) {
    374   1.2   minoura 		if (*p == 0) {	/* new intr */
    375   1.2   minoura 			if (p + strlen(name) >= eintrnames)
    376  1.31     isaki 				panic("Interrupt statics buffer overrun.");
    377  1.31     isaki 			strcpy(p, name);
    378   1.2   minoura 			break;
    379   1.2   minoura 		}
    380   1.2   minoura 		if (strcmp(p, name) == 0)
    381   1.2   minoura 			break;
    382   1.2   minoura 		r++;
    383   1.2   minoura 		while (*p++ != 0);
    384   1.2   minoura 	}
    385   1.2   minoura 
    386   1.2   minoura 	return r;
    387   1.2   minoura }
    388   1.2   minoura 
    389   1.2   minoura int
    390  1.25       chs intio_intr_disestablish(int vector, void *arg)
    391   1.2   minoura {
    392   1.2   minoura 	if (iiv[vector].iiv_handler == 0 || iiv[vector].iiv_arg != arg)
    393   1.2   minoura 		return EINVAL;
    394   1.2   minoura 	iiv[vector].iiv_handler = 0;
    395   1.2   minoura 	iiv[vector].iiv_arg = 0;
    396   1.2   minoura 
    397   1.2   minoura 	return 0;
    398   1.2   minoura }
    399   1.2   minoura 
    400   1.2   minoura int
    401  1.25       chs intio_intr(struct frame *frame)
    402   1.2   minoura {
    403   1.2   minoura 	int vector = frame->f_vector / 4;
    404   1.2   minoura 	extern int intrcnt[];
    405   1.2   minoura 
    406   1.2   minoura #if 0				/* this is not correct now */
    407   1.2   minoura 	/* CAUTION: HERE WE ARE IN SPLHIGH() */
    408   1.2   minoura 	/* LOWER TO APPROPRIATE IPL AT VERY FIRST IN THE HANDLER!! */
    409   1.2   minoura #endif
    410   1.2   minoura 	if (iiv[vector].iiv_handler == 0) {
    411  1.31     isaki 		printf("Stray interrupt: %d type %x, pc %x\n",
    412  1.21   nsmrtks 			vector, frame->f_format, frame->f_pc);
    413   1.2   minoura 		return 0;
    414   1.2   minoura 	}
    415   1.2   minoura 
    416   1.2   minoura 	intrcnt[iiv[vector].iiv_intrcntoff]++;
    417   1.2   minoura 
    418  1.31     isaki 	return (*(iiv[vector].iiv_handler))(iiv[vector].iiv_arg);
    419   1.2   minoura }
    420   1.2   minoura 
    421   1.2   minoura /*
    422  1.23       wiz  * Intio I/O controller interrupt
    423   1.2   minoura  */
    424   1.3   minoura static u_int8_t intio_ivec = 0;
    425   1.3   minoura 
    426   1.2   minoura void
    427  1.25       chs intio_set_ivec(int vec)
    428   1.2   minoura {
    429   1.2   minoura 	vec &= 0xfc;
    430   1.2   minoura 
    431   1.2   minoura 	if (intio_ivec && intio_ivec != (vec & 0xfc))
    432  1.31     isaki 		panic("Wrong interrupt vector for Sicilian.");
    433   1.2   minoura 
    434   1.2   minoura 	intio_ivec = vec;
    435   1.2   minoura 	intio_set_sicilian_ivec(vec);
    436   1.2   minoura }
    437   1.2   minoura 
    438   1.2   minoura 
    439   1.2   minoura /*
    440  1.19       wiz  * intio bus DMA stuff.  stolen from arch/i386/isa/isa_machdep.c
    441   1.2   minoura  */
    442   1.2   minoura 
    443   1.2   minoura /*
    444   1.2   minoura  * Create an INTIO DMA map.
    445   1.2   minoura  */
    446   1.2   minoura int
    447  1.25       chs _intio_bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
    448  1.25       chs     bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
    449   1.2   minoura {
    450   1.2   minoura 	struct intio_dma_cookie *cookie;
    451   1.2   minoura 	bus_dmamap_t map;
    452   1.2   minoura 	int error, cookieflags;
    453   1.2   minoura 	void *cookiestore;
    454   1.2   minoura 	size_t cookiesize;
    455   1.2   minoura 	extern paddr_t avail_end;
    456   1.2   minoura 
    457   1.2   minoura 	/* Call common function to create the basic map. */
    458   1.2   minoura 	error = x68k_bus_dmamap_create(t, size, nsegments, maxsegsz, boundary,
    459   1.2   minoura 	    flags, dmamp);
    460   1.2   minoura 	if (error)
    461   1.2   minoura 		return (error);
    462   1.2   minoura 
    463   1.2   minoura 	map = *dmamp;
    464   1.2   minoura 	map->x68k_dm_cookie = NULL;
    465   1.2   minoura 
    466   1.2   minoura 	cookiesize = sizeof(struct intio_dma_cookie);
    467   1.2   minoura 
    468   1.2   minoura 	/*
    469   1.2   minoura 	 * INTIO only has 24-bits of address space.  This means
    470   1.2   minoura 	 * we can't DMA to pages over 16M.  In order to DMA to
    471   1.2   minoura 	 * arbitrary buffers, we use "bounce buffers" - pages
    472   1.2   minoura 	 * in memory below the 16M boundary.  On DMA reads,
    473   1.2   minoura 	 * DMA happens to the bounce buffers, and is copied into
    474   1.2   minoura 	 * the caller's buffer.  On writes, data is copied into
    475   1.2   minoura 	 * but bounce buffer, and the DMA happens from those
    476   1.2   minoura 	 * pages.  To software using the DMA mapping interface,
    477   1.2   minoura 	 * this looks simply like a data cache.
    478   1.2   minoura 	 *
    479   1.2   minoura 	 * If we have more than 16M of RAM in the system, we may
    480   1.2   minoura 	 * need bounce buffers.  We check and remember that here.
    481   1.2   minoura 	 *
    482   1.2   minoura 	 * ...or, there is an opposite case.  The most segments
    483  1.18   thorpej 	 * a transfer will require is (maxxfer / PAGE_SIZE) + 1.  If
    484   1.2   minoura 	 * the caller can't handle that many segments (e.g. the
    485   1.2   minoura 	 * DMAC), we may have to bounce it as well.
    486   1.2   minoura 	 */
    487   1.2   minoura 	if (avail_end <= t->_bounce_thresh)
    488  1.32     isaki 		/* Bouncing not necessary due to memory size. */
    489   1.2   minoura 		map->x68k_dm_bounce_thresh = 0;
    490   1.2   minoura 	cookieflags = 0;
    491   1.2   minoura 	if (map->x68k_dm_bounce_thresh != 0 ||
    492  1.18   thorpej 	    ((map->x68k_dm_size / PAGE_SIZE) + 1) > map->x68k_dm_segcnt) {
    493   1.2   minoura 		cookieflags |= ID_MIGHT_NEED_BOUNCE;
    494   1.2   minoura 		cookiesize += (sizeof(bus_dma_segment_t) * map->x68k_dm_segcnt);
    495   1.2   minoura 	}
    496   1.2   minoura 
    497   1.2   minoura 	/*
    498   1.2   minoura 	 * Allocate our cookie.
    499   1.2   minoura 	 */
    500   1.2   minoura 	if ((cookiestore = malloc(cookiesize, M_DMAMAP,
    501   1.2   minoura 	    (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL) {
    502   1.2   minoura 		error = ENOMEM;
    503   1.2   minoura 		goto out;
    504   1.2   minoura 	}
    505   1.2   minoura 	memset(cookiestore, 0, cookiesize);
    506   1.2   minoura 	cookie = (struct intio_dma_cookie *)cookiestore;
    507   1.2   minoura 	cookie->id_flags = cookieflags;
    508   1.2   minoura 	map->x68k_dm_cookie = cookie;
    509   1.2   minoura 
    510   1.2   minoura 	if (cookieflags & ID_MIGHT_NEED_BOUNCE) {
    511   1.2   minoura 		/*
    512   1.2   minoura 		 * Allocate the bounce pages now if the caller
    513   1.2   minoura 		 * wishes us to do so.
    514   1.2   minoura 		 */
    515   1.2   minoura 		if ((flags & BUS_DMA_ALLOCNOW) == 0)
    516   1.2   minoura 			goto out;
    517   1.2   minoura 
    518   1.2   minoura 		error = _intio_dma_alloc_bouncebuf(t, map, size, flags);
    519   1.2   minoura 	}
    520   1.2   minoura 
    521   1.2   minoura  out:
    522   1.2   minoura 	if (error) {
    523   1.2   minoura 		if (map->x68k_dm_cookie != NULL)
    524   1.2   minoura 			free(map->x68k_dm_cookie, M_DMAMAP);
    525   1.2   minoura 		x68k_bus_dmamap_destroy(t, map);
    526   1.2   minoura 	}
    527   1.2   minoura 	return (error);
    528   1.2   minoura }
    529   1.2   minoura 
    530   1.2   minoura /*
    531   1.2   minoura  * Destroy an INTIO DMA map.
    532   1.2   minoura  */
    533   1.2   minoura void
    534  1.25       chs _intio_bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map)
    535   1.2   minoura {
    536   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    537   1.2   minoura 
    538   1.2   minoura 	/*
    539   1.2   minoura 	 * Free any bounce pages this map might hold.
    540   1.2   minoura 	 */
    541   1.2   minoura 	if (cookie->id_flags & ID_HAS_BOUNCE)
    542   1.2   minoura 		_intio_dma_free_bouncebuf(t, map);
    543   1.2   minoura 
    544   1.2   minoura 	free(cookie, M_DMAMAP);
    545   1.2   minoura 	x68k_bus_dmamap_destroy(t, map);
    546   1.2   minoura }
    547   1.2   minoura 
    548   1.2   minoura /*
    549   1.2   minoura  * Load an INTIO DMA map with a linear buffer.
    550   1.2   minoura  */
    551   1.2   minoura int
    552  1.25       chs _intio_bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
    553  1.25       chs     bus_size_t buflen, struct proc *p, int flags)
    554   1.2   minoura {
    555   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    556   1.2   minoura 	int error;
    557   1.2   minoura 
    558   1.2   minoura 	/*
    559   1.2   minoura 	 * Make sure that on error condition we return "no valid mappings."
    560   1.2   minoura 	 */
    561   1.2   minoura 	map->dm_mapsize = 0;
    562   1.2   minoura 	map->dm_nsegs = 0;
    563   1.2   minoura 
    564   1.2   minoura 	/*
    565   1.2   minoura 	 * Try to load the map the normal way.  If this errors out,
    566   1.2   minoura 	 * and we can bounce, we will.
    567   1.2   minoura 	 */
    568   1.2   minoura 	error = x68k_bus_dmamap_load(t, map, buf, buflen, p, flags);
    569   1.2   minoura 	if (error == 0 ||
    570   1.2   minoura 	    (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0))
    571   1.2   minoura 		return (error);
    572   1.2   minoura 
    573   1.2   minoura 	/*
    574   1.2   minoura 	 * Allocate bounce pages, if necessary.
    575   1.2   minoura 	 */
    576   1.2   minoura 	if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) {
    577   1.2   minoura 		error = _intio_dma_alloc_bouncebuf(t, map, buflen, flags);
    578   1.2   minoura 		if (error)
    579   1.2   minoura 			return (error);
    580   1.2   minoura 	}
    581   1.2   minoura 
    582   1.2   minoura 	/*
    583   1.2   minoura 	 * Cache a pointer to the caller's buffer and load the DMA map
    584   1.2   minoura 	 * with the bounce buffer.
    585   1.2   minoura 	 */
    586   1.2   minoura 	cookie->id_origbuf = buf;
    587   1.2   minoura 	cookie->id_origbuflen = buflen;
    588   1.2   minoura 	cookie->id_buftype = ID_BUFTYPE_LINEAR;
    589   1.2   minoura 	error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf, buflen,
    590   1.2   minoura 	    p, flags);
    591   1.2   minoura 	if (error) {
    592   1.2   minoura 		/*
    593   1.2   minoura 		 * Free the bounce pages, unless our resources
    594   1.2   minoura 		 * are reserved for our exclusive use.
    595   1.2   minoura 		 */
    596   1.2   minoura 		if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0)
    597   1.2   minoura 			_intio_dma_free_bouncebuf(t, map);
    598   1.2   minoura 		return (error);
    599   1.2   minoura 	}
    600   1.2   minoura 
    601   1.2   minoura 	/* ...so _intio_bus_dmamap_sync() knows we're bouncing */
    602   1.2   minoura 	cookie->id_flags |= ID_IS_BOUNCING;
    603   1.2   minoura 	return (0);
    604   1.2   minoura }
    605   1.2   minoura 
    606   1.2   minoura /*
    607   1.2   minoura  * Like _intio_bus_dmamap_load(), but for mbufs.
    608   1.2   minoura  */
    609   1.2   minoura int
    610  1.25       chs _intio_bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0,
    611  1.25       chs     int flags)
    612   1.2   minoura {
    613   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    614   1.2   minoura 	int error;
    615   1.2   minoura 
    616   1.2   minoura 	/*
    617   1.2   minoura 	 * Make sure on error condition we return "no valid mappings."
    618   1.2   minoura 	 */
    619   1.2   minoura 	map->dm_mapsize = 0;
    620   1.2   minoura 	map->dm_nsegs = 0;
    621   1.2   minoura 
    622   1.2   minoura #ifdef DIAGNOSTIC
    623   1.2   minoura 	if ((m0->m_flags & M_PKTHDR) == 0)
    624   1.2   minoura 		panic("_intio_bus_dmamap_load_mbuf: no packet header");
    625   1.2   minoura #endif
    626   1.2   minoura 
    627   1.2   minoura 	if (m0->m_pkthdr.len > map->x68k_dm_size)
    628   1.2   minoura 		return (EINVAL);
    629   1.2   minoura 
    630   1.2   minoura 	/*
    631   1.2   minoura 	 * Try to load the map the normal way.  If this errors out,
    632   1.2   minoura 	 * and we can bounce, we will.
    633   1.2   minoura 	 */
    634   1.2   minoura 	error = x68k_bus_dmamap_load_mbuf(t, map, m0, flags);
    635   1.2   minoura 	if (error == 0 ||
    636   1.2   minoura 	    (error != 0 && (cookie->id_flags & ID_MIGHT_NEED_BOUNCE) == 0))
    637   1.2   minoura 		return (error);
    638   1.2   minoura 
    639   1.2   minoura 	/*
    640   1.2   minoura 	 * Allocate bounce pages, if necessary.
    641   1.2   minoura 	 */
    642   1.2   minoura 	if ((cookie->id_flags & ID_HAS_BOUNCE) == 0) {
    643   1.2   minoura 		error = _intio_dma_alloc_bouncebuf(t, map, m0->m_pkthdr.len,
    644   1.2   minoura 		    flags);
    645   1.2   minoura 		if (error)
    646   1.2   minoura 			return (error);
    647   1.2   minoura 	}
    648   1.2   minoura 
    649   1.2   minoura 	/*
    650   1.2   minoura 	 * Cache a pointer to the caller's buffer and load the DMA map
    651   1.2   minoura 	 * with the bounce buffer.
    652   1.2   minoura 	 */
    653   1.2   minoura 	cookie->id_origbuf = m0;
    654   1.2   minoura 	cookie->id_origbuflen = m0->m_pkthdr.len;	/* not really used */
    655   1.2   minoura 	cookie->id_buftype = ID_BUFTYPE_MBUF;
    656   1.2   minoura 	error = x68k_bus_dmamap_load(t, map, cookie->id_bouncebuf,
    657   1.2   minoura 	    m0->m_pkthdr.len, NULL, flags);
    658   1.2   minoura 	if (error) {
    659   1.2   minoura 		/*
    660   1.2   minoura 		 * Free the bounce pages, unless our resources
    661   1.2   minoura 		 * are reserved for our exclusive use.
    662   1.2   minoura 		 */
    663   1.2   minoura 		if ((map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0)
    664   1.2   minoura 			_intio_dma_free_bouncebuf(t, map);
    665   1.2   minoura 		return (error);
    666   1.2   minoura 	}
    667   1.2   minoura 
    668   1.2   minoura 	/* ...so _intio_bus_dmamap_sync() knows we're bouncing */
    669   1.2   minoura 	cookie->id_flags |= ID_IS_BOUNCING;
    670   1.2   minoura 	return (0);
    671   1.2   minoura }
    672   1.2   minoura 
    673   1.2   minoura /*
    674   1.2   minoura  * Like _intio_bus_dmamap_load(), but for uios.
    675   1.2   minoura  */
    676   1.2   minoura int
    677  1.25       chs _intio_bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio,
    678  1.25       chs     int flags)
    679   1.2   minoura {
    680   1.2   minoura 	panic("_intio_bus_dmamap_load_uio: not implemented");
    681   1.2   minoura }
    682   1.2   minoura 
    683   1.2   minoura /*
    684   1.2   minoura  * Like _intio_bus_dmamap_load(), but for raw memory allocated with
    685   1.2   minoura  * bus_dmamem_alloc().
    686   1.2   minoura  */
    687   1.2   minoura int
    688  1.25       chs _intio_bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
    689  1.25       chs     bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
    690   1.2   minoura {
    691   1.2   minoura 
    692   1.2   minoura 	panic("_intio_bus_dmamap_load_raw: not implemented");
    693   1.2   minoura }
    694   1.2   minoura 
    695   1.2   minoura /*
    696   1.2   minoura  * Unload an INTIO DMA map.
    697   1.2   minoura  */
    698   1.2   minoura void
    699  1.25       chs _intio_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map)
    700   1.2   minoura {
    701   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    702   1.2   minoura 
    703   1.2   minoura 	/*
    704   1.2   minoura 	 * If we have bounce pages, free them, unless they're
    705   1.2   minoura 	 * reserved for our exclusive use.
    706   1.2   minoura 	 */
    707   1.2   minoura 	if ((cookie->id_flags & ID_HAS_BOUNCE) &&
    708   1.2   minoura 	    (map->x68k_dm_flags & BUS_DMA_ALLOCNOW) == 0)
    709   1.2   minoura 		_intio_dma_free_bouncebuf(t, map);
    710   1.2   minoura 
    711   1.2   minoura 	cookie->id_flags &= ~ID_IS_BOUNCING;
    712   1.2   minoura 	cookie->id_buftype = ID_BUFTYPE_INVALID;
    713   1.2   minoura 
    714   1.2   minoura 	/*
    715   1.2   minoura 	 * Do the generic bits of the unload.
    716   1.2   minoura 	 */
    717   1.2   minoura 	x68k_bus_dmamap_unload(t, map);
    718   1.2   minoura }
    719   1.2   minoura 
    720   1.2   minoura /*
    721   1.2   minoura  * Synchronize an INTIO DMA map.
    722   1.2   minoura  */
    723   1.2   minoura void
    724  1.25       chs _intio_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset,
    725  1.25       chs     bus_size_t len, int ops)
    726   1.2   minoura {
    727   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    728   1.2   minoura 
    729   1.2   minoura 	/*
    730   1.2   minoura 	 * Mixing PRE and POST operations is not allowed.
    731   1.2   minoura 	 */
    732   1.2   minoura 	if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 &&
    733   1.2   minoura 	    (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0)
    734   1.2   minoura 		panic("_intio_bus_dmamap_sync: mix PRE and POST");
    735   1.2   minoura 
    736   1.2   minoura #ifdef DIAGNOSTIC
    737   1.2   minoura 	if ((ops & (BUS_DMASYNC_PREWRITE|BUS_DMASYNC_POSTREAD)) != 0) {
    738   1.2   minoura 		if (offset >= map->dm_mapsize)
    739   1.2   minoura 			panic("_intio_bus_dmamap_sync: bad offset");
    740   1.2   minoura 		if (len == 0 || (offset + len) > map->dm_mapsize)
    741   1.2   minoura 			panic("_intio_bus_dmamap_sync: bad length");
    742   1.2   minoura 	}
    743   1.2   minoura #endif
    744   1.2   minoura 
    745   1.2   minoura 	/*
    746   1.2   minoura 	 * If we're not bouncing, just return; nothing to do.
    747   1.2   minoura 	 */
    748   1.2   minoura 	if ((cookie->id_flags & ID_IS_BOUNCING) == 0)
    749   1.2   minoura 		return;
    750   1.2   minoura 
    751   1.2   minoura 	switch (cookie->id_buftype) {
    752   1.2   minoura 	case ID_BUFTYPE_LINEAR:
    753   1.2   minoura 		/*
    754   1.2   minoura 		 * Nothing to do for pre-read.
    755   1.2   minoura 		 */
    756   1.2   minoura 
    757   1.2   minoura 		if (ops & BUS_DMASYNC_PREWRITE) {
    758   1.2   minoura 			/*
    759   1.2   minoura 			 * Copy the caller's buffer to the bounce buffer.
    760   1.2   minoura 			 */
    761   1.2   minoura 			memcpy((char *)cookie->id_bouncebuf + offset,
    762   1.2   minoura 			    (char *)cookie->id_origbuf + offset, len);
    763   1.2   minoura 		}
    764   1.2   minoura 
    765   1.2   minoura 		if (ops & BUS_DMASYNC_POSTREAD) {
    766   1.2   minoura 			/*
    767   1.2   minoura 			 * Copy the bounce buffer to the caller's buffer.
    768   1.2   minoura 			 */
    769   1.2   minoura 			memcpy((char *)cookie->id_origbuf + offset,
    770   1.2   minoura 			    (char *)cookie->id_bouncebuf + offset, len);
    771   1.2   minoura 		}
    772   1.2   minoura 
    773   1.2   minoura 		/*
    774   1.2   minoura 		 * Nothing to do for post-write.
    775   1.2   minoura 		 */
    776   1.2   minoura 		break;
    777   1.2   minoura 
    778   1.2   minoura 	case ID_BUFTYPE_MBUF:
    779   1.2   minoura 	    {
    780   1.2   minoura 		struct mbuf *m, *m0 = cookie->id_origbuf;
    781   1.2   minoura 		bus_size_t minlen, moff;
    782   1.2   minoura 
    783   1.2   minoura 		/*
    784   1.2   minoura 		 * Nothing to do for pre-read.
    785   1.2   minoura 		 */
    786   1.2   minoura 
    787   1.2   minoura 		if (ops & BUS_DMASYNC_PREWRITE) {
    788   1.2   minoura 			/*
    789   1.2   minoura 			 * Copy the caller's buffer to the bounce buffer.
    790   1.2   minoura 			 */
    791   1.2   minoura 			m_copydata(m0, offset, len,
    792   1.2   minoura 			    (char *)cookie->id_bouncebuf + offset);
    793   1.2   minoura 		}
    794   1.2   minoura 
    795   1.2   minoura 		if (ops & BUS_DMASYNC_POSTREAD) {
    796   1.2   minoura 			/*
    797   1.2   minoura 			 * Copy the bounce buffer to the caller's buffer.
    798   1.2   minoura 			 */
    799   1.2   minoura 			for (moff = offset, m = m0; m != NULL && len != 0;
    800   1.2   minoura 			     m = m->m_next) {
    801   1.2   minoura 				/* Find the beginning mbuf. */
    802   1.2   minoura 				if (moff >= m->m_len) {
    803   1.2   minoura 					moff -= m->m_len;
    804   1.2   minoura 					continue;
    805   1.2   minoura 				}
    806   1.2   minoura 
    807   1.2   minoura 				/*
    808   1.2   minoura 				 * Now at the first mbuf to sync; nail
    809   1.2   minoura 				 * each one until we have exhausted the
    810   1.2   minoura 				 * length.
    811   1.2   minoura 				 */
    812   1.2   minoura 				minlen = len < m->m_len - moff ?
    813   1.2   minoura 				    len : m->m_len - moff;
    814   1.2   minoura 
    815  1.30        he 				memcpy(mtod(m, char *) + moff,
    816   1.2   minoura 				    (char *)cookie->id_bouncebuf + offset,
    817   1.2   minoura 				    minlen);
    818   1.2   minoura 
    819   1.2   minoura 				moff = 0;
    820   1.2   minoura 				len -= minlen;
    821   1.2   minoura 				offset += minlen;
    822   1.2   minoura 			}
    823   1.2   minoura 		}
    824   1.2   minoura 
    825   1.2   minoura 		/*
    826   1.2   minoura 		 * Nothing to do for post-write.
    827   1.2   minoura 		 */
    828   1.2   minoura 		break;
    829   1.2   minoura 	    }
    830   1.2   minoura 
    831   1.2   minoura 	case ID_BUFTYPE_UIO:
    832   1.2   minoura 		panic("_intio_bus_dmamap_sync: ID_BUFTYPE_UIO");
    833   1.2   minoura 		break;
    834   1.2   minoura 
    835   1.2   minoura 	case ID_BUFTYPE_RAW:
    836   1.2   minoura 		panic("_intio_bus_dmamap_sync: ID_BUFTYPE_RAW");
    837   1.2   minoura 		break;
    838   1.2   minoura 
    839   1.2   minoura 	case ID_BUFTYPE_INVALID:
    840   1.2   minoura 		panic("_intio_bus_dmamap_sync: ID_BUFTYPE_INVALID");
    841   1.2   minoura 		break;
    842   1.2   minoura 
    843   1.2   minoura 	default:
    844   1.2   minoura 		printf("unknown buffer type %d\n", cookie->id_buftype);
    845   1.2   minoura 		panic("_intio_bus_dmamap_sync");
    846   1.2   minoura 	}
    847   1.2   minoura }
    848   1.2   minoura 
    849   1.2   minoura /*
    850   1.2   minoura  * Allocate memory safe for INTIO DMA.
    851   1.2   minoura  */
    852   1.2   minoura int
    853  1.25       chs _intio_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
    854  1.25       chs     bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
    855  1.25       chs     int flags)
    856   1.2   minoura {
    857   1.2   minoura 	paddr_t high;
    858   1.2   minoura 	extern paddr_t avail_end;
    859   1.2   minoura 
    860   1.2   minoura 	if (avail_end > INTIO_DMA_BOUNCE_THRESHOLD)
    861   1.2   minoura 		high = trunc_page(INTIO_DMA_BOUNCE_THRESHOLD);
    862   1.2   minoura 	else
    863   1.2   minoura 		high = trunc_page(avail_end);
    864   1.2   minoura 
    865   1.2   minoura 	return (x68k_bus_dmamem_alloc_range(t, size, alignment, boundary,
    866   1.2   minoura 	    segs, nsegs, rsegs, flags, 0, high));
    867   1.2   minoura }
    868   1.2   minoura 
    869   1.2   minoura /**********************************************************************
    870   1.2   minoura  * INTIO DMA utility functions
    871   1.2   minoura  **********************************************************************/
    872   1.2   minoura 
    873   1.2   minoura int
    874  1.25       chs _intio_dma_alloc_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map, bus_size_t size,
    875  1.25       chs     int flags)
    876   1.2   minoura {
    877   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    878   1.2   minoura 	int error = 0;
    879   1.2   minoura 
    880   1.2   minoura 	cookie->id_bouncebuflen = round_page(size);
    881   1.2   minoura 	error = _intio_bus_dmamem_alloc(t, cookie->id_bouncebuflen,
    882  1.18   thorpej 	    PAGE_SIZE, map->x68k_dm_boundary, cookie->id_bouncesegs,
    883   1.2   minoura 	    map->x68k_dm_segcnt, &cookie->id_nbouncesegs, flags);
    884   1.2   minoura 	if (error)
    885   1.2   minoura 		goto out;
    886   1.2   minoura 	error = x68k_bus_dmamem_map(t, cookie->id_bouncesegs,
    887   1.2   minoura 	    cookie->id_nbouncesegs, cookie->id_bouncebuflen,
    888  1.29  christos 	    (void **)&cookie->id_bouncebuf, flags);
    889   1.2   minoura 
    890   1.2   minoura  out:
    891   1.2   minoura 	if (error) {
    892   1.2   minoura 		x68k_bus_dmamem_free(t, cookie->id_bouncesegs,
    893   1.2   minoura 		    cookie->id_nbouncesegs);
    894   1.2   minoura 		cookie->id_bouncebuflen = 0;
    895   1.2   minoura 		cookie->id_nbouncesegs = 0;
    896   1.2   minoura 	} else {
    897   1.2   minoura 		cookie->id_flags |= ID_HAS_BOUNCE;
    898   1.2   minoura 	}
    899   1.2   minoura 
    900   1.2   minoura 	return (error);
    901   1.2   minoura }
    902   1.2   minoura 
    903   1.2   minoura void
    904  1.25       chs _intio_dma_free_bouncebuf(bus_dma_tag_t t, bus_dmamap_t map)
    905   1.2   minoura {
    906   1.2   minoura 	struct intio_dma_cookie *cookie = map->x68k_dm_cookie;
    907   1.2   minoura 
    908   1.2   minoura 	x68k_bus_dmamem_unmap(t, cookie->id_bouncebuf,
    909   1.2   minoura 	    cookie->id_bouncebuflen);
    910   1.2   minoura 	x68k_bus_dmamem_free(t, cookie->id_bouncesegs,
    911   1.2   minoura 	    cookie->id_nbouncesegs);
    912   1.2   minoura 	cookie->id_bouncebuflen = 0;
    913   1.2   minoura 	cookie->id_nbouncesegs = 0;
    914   1.2   minoura 	cookie->id_flags &= ~ID_HAS_BOUNCE;
    915   1.2   minoura }
    916