/*- * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. */ /* * Copyright (c) 1997-1999 Eduardo E. Horvath. All rights reserved. * Copyright (c) 1996 Charles M. Hannum. All rights reserved. * Copyright (c) 1996 Christopher G. Demetriou. 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 Christopher G. Demetriou * for the NetBSD Project. * 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. * * from: NetBSD: bus.h,v 1.28 2001/07/19 15:32:19 thorpej Exp * and * from: FreeBSD: src/sys/alpha/include/bus.h,v 1.9 2001/01/09 * * $FreeBSD$ */ #ifndef _MACHINE_BUS_H_ #define _MACHINE_BUS_H_ #include #include /* * Debug hooks */ #define BSDB_ACCESS 0x01 extern int bus_space_debug; /* * UPA and SBUS spaces are non-cached and big endian * (except for RAM and PROM) * * PCI spaces are non-cached and little endian */ #define UPA_BUS_SPACE 0 #define SBUS_BUS_SPACE 1 #define PCI_CONFIG_BUS_SPACE 2 #define PCI_IO_BUS_SPACE 3 #define PCI_MEMORY_BUS_SPACE 4 #define LAST_BUS_SPACE 5 extern int bus_type_asi[]; extern int bus_stream_asi[]; #define __BUS_SPACE_HAS_STREAM_METHODS 1 /* * Bus address and size types */ typedef u_long bus_space_handle_t; typedef int bus_type_t; typedef u_long bus_addr_t; typedef u_long bus_size_t; #define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF #define BUS_SPACE_MAXSIZE (128 * 1024) /* Maximum supported size */ #define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF #define BUS_SPACE_MAXADDR 0xFFFFFFFF #define BUS_SPACE_UNRESTRICTED (~0UL) /* * Access methods for bus resources and address space. */ typedef struct bus_space_tag *bus_space_tag_t; struct bus_space_tag { void *cookie; bus_space_tag_t parent; int type; void (*bus_barrier) __P(( bus_space_tag_t, bus_space_handle_t, bus_size_t, /*offset*/ bus_size_t, /*size*/ int)); /*flags*/ }; /* * Helpers */ int sparc64_bus_mem_map __P(( bus_type_t, bus_addr_t, bus_size_t, int, /*flags*/ vm_offset_t, /*preferred vaddr*/ void **)); int sparc64_bus_mem_unmap __P(( void *, bus_size_t)); bus_space_handle_t sparc64_fake_bustag __P(( int, bus_addr_t, struct bus_space_tag *)); /* * Bus space function prototypes. */ static void bus_space_barrier __P(( bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_size_t, int)); /* This macro finds the first "upstream" implementation of method `f' */ #define _BS_CALL(t,f) \ while (t->f == NULL) \ t = t->parent; \ return (*(t)->f) __inline__ void bus_space_barrier(t, h, o, s, f) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o; bus_size_t s; int f; { _BS_CALL(t, bus_barrier)(t, h, o, s, f); } /* flags for bus space map functions */ #define BUS_SPACE_MAP_CACHEABLE 0x0001 #define BUS_SPACE_MAP_LINEAR 0x0002 #define BUS_SPACE_MAP_READONLY 0x0004 #define BUS_SPACE_MAP_PREFETCHABLE 0x0008 /* placeholders for bus functions... */ #define BUS_SPACE_MAP_BUS1 0x0100 #define BUS_SPACE_MAP_BUS2 0x0200 #define BUS_SPACE_MAP_BUS3 0x0400 #define BUS_SPACE_MAP_BUS4 0x0800 /* flags for bus_space_barrier() */ #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ /* * u_intN_t bus_space_read_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset)); * * Read a 1, 2, 4, or 8 byte quantity from bus space * described by tag/handle/offset. */ #ifndef BUS_SPACE_DEBUG #define bus_space_read_1(t, h, o) \ lduba_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]) #define bus_space_read_2(t, h, o) \ lduha_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]) #define bus_space_read_4(t, h, o) \ lduwa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]) #define bus_space_read_8(t, h, o) \ ldxa_nc((caddr_t)(h) + (o), bus_type_asi[(t)->type]) #else #define bus_space_read_1(t, h, o) ({ \ unsigned char __bv = \ lduba_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr1(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (unsigned int) __bv); \ __bv; }) #define bus_space_read_2(t, h, o) ({ \ unsigned short __bv = \ lduha_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr2(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (unsigned int)__bv); \ __bv; }) #define bus_space_read_4(t, h, o) ({ \ unsigned int __bv = \ lduwa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr4(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], __bv); \ __bv; }) #define bus_space_read_8(t, h, o) ({ \ u_int64_t __bv = \ ldxa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr8(%llx + %llx, %x) -> %llx\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], __bv); \ __bv; }) #endif /* * void bus_space_read_multi_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t *addr, size_t count)); * * Read `count' 1, 2, 4, or 8 byte quantities from bus space * described by tag/handle/offset and copy into buffer provided. */ #define bus_space_read_multi_1(t, h, o, a, c) do { \ int i = c; \ u_int8_t *p = (u_int8_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_1(t, h, o); \ } while (0) #define bus_space_read_multi_2(t, h, o, a, c) do { \ int i = c; \ u_int16_t *p = (u_int16_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_2(t, h, o); \ } while (0) #define bus_space_read_multi_4(t, h, o, a, c) do { \ int i = c; \ u_int32_t *p = (u_int32_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_4(t, h, o); \ } while (0) #define bus_space_read_multi_8(t, h, o, a, c) do { \ int i = c; \ u_int64_t *p = (u_int64_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_8(t, h, o); \ } while (0) /* * void bus_space_write_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t value)); * * Write the 1, 2, 4, or 8 byte value `value' to bus space * described by tag/handle/offset. */ #ifndef BUS_SPACE_DEBUG #define bus_space_write_1(t, h, o, v) \ stba_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)) #define bus_space_write_2(t, h, o, v) \ stha_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)) #define bus_space_write_4(t, h, o, v) \ stwa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)) #define bus_space_write_8(t, h, o, v) \ stxa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)) #else #define bus_space_write_1(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw1(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (unsigned int) v); \ stba_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_2(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw2(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (unsigned int) v); \ stha_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_4(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw4(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (unsigned int) v); \ stwa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_8(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw8(%llx + %llx, %x) <- %llx\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_type_asi[(t)->type], (u_int64_t) v); \ stxa_nc((caddr_t)((h) + (o)), bus_type_asi[(t)->type], (v)); \ } while (0) #endif /* * void bus_space_write_multi_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_intN_t *addr, size_t count)); * * Write `count' 1, 2, 4, or 8 byte quantities from the buffer * provided to bus space described by tag/handle/offset. */ #define bus_space_write_multi_1(t, h, o, a, c) do { \ int i = c; \ u_int8_t *p = (u_int8_t *)a; \ while (i-- > 0) \ bus_space_write_1(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_2(t, h, o, a, c) do { \ int i = c; \ u_int16_t *p = (u_int16_t *)a; \ while (i-- > 0) \ bus_space_write_2(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_4(t, h, o, a, c) do { \ int i = c; \ u_int32_t *p = (u_int32_t *)a; \ while (i-- > 0) \ bus_space_write_4(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_8(t, h, o, a, c) do { \ int i = c; \ u_int64_t *p = (u_int64_t *)a; \ while (i-- > 0) \ bus_space_write_8(t, h, o, *p++); \ } while (0) /* * void bus_space_set_multi_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, * size_t count)); * * Write the 1, 2, 4, or 8 byte value `val' to bus space described * by tag/handle/offset `count' times. */ #define bus_space_set_multi_1(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_1(t, h, o, v); \ } while (0) #define bus_space_set_multi_2(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_2(t, h, o, v); \ } while (0) #define bus_space_set_multi_4(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_4(t, h, o, v); \ } while (0) #define bus_space_set_multi_8(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_8(t, h, o, v); \ } while (0) /* * void bus_space_read_region_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_read_region_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t)); static void bus_space_read_region_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t)); static void bus_space_read_region_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t)); static void bus_space_read_region_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t)); static __inline__ void bus_space_read_region_1(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int8_t *a; { for (; c; a++, c--, o++) *a = bus_space_read_1(t, h, o); } static __inline__ void bus_space_read_region_2(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int16_t *a; { for (; c; a++, c--, o+=2) *a = bus_space_read_2(t, h, o); } static __inline__ void bus_space_read_region_4(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int32_t *a; { for (; c; a++, c--, o+=4) *a = bus_space_read_4(t, h, o); } static __inline__ void bus_space_read_region_8(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int64_t *a; { for (; c; a++, c--, o+=8) *a = bus_space_read_8(t, h, o); } /* * void bus_space_write_region_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_write_region_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t)); static void bus_space_write_region_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t)); static void bus_space_write_region_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t)); static void bus_space_write_region_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t)); static __inline__ void bus_space_write_region_1(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int8_t *a; { for (; c; a++, c--, o++) bus_space_write_1(t, h, o, *a); } static __inline__ void bus_space_write_region_2(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int16_t *a; { for (; c; a++, c--, o+=2) bus_space_write_2(t, h, o, *a); } static __inline__ void bus_space_write_region_4(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int32_t *a; { for (; c; a++, c--, o+=4) bus_space_write_4(t, h, o, *a); } static __inline__ void bus_space_write_region_8(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int64_t *a; { for (; c; a++, c--, o+=8) bus_space_write_8(t, h, o, *a); } /* * void bus_space_set_region_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_set_region_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int8_t, bus_size_t)); static void bus_space_set_region_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int16_t, bus_size_t)); static void bus_space_set_region_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int32_t, bus_size_t)); static void bus_space_set_region_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int64_t, bus_size_t)); static __inline__ void bus_space_set_region_1(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int8_t v; { for (; c; c--, o++) bus_space_write_1(t, h, o, v); } static __inline__ void bus_space_set_region_2(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int16_t v; { for (; c; c--, o+=2) bus_space_write_2(t, h, o, v); } static __inline__ void bus_space_set_region_4(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int32_t v; { for (; c; c--, o+=4) bus_space_write_4(t, h, o, v); } static __inline__ void bus_space_set_region_8(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int64_t v; { for (; c; c--, o+=8) bus_space_write_8(t, h, o, v); } /* * void bus_space_copy_region_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh1, bus_size_t off1, * bus_space_handle_t bsh2, bus_size_t off2, * bus_size_t count)); * * Copy `count' 1, 2, 4, or 8 byte values from bus space starting * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. */ static void bus_space_copy_region_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static __inline__ void bus_space_copy_region_1(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1++, o2++) bus_space_write_1(t, h1, o1, bus_space_read_1(t, h2, o2)); } static __inline__ void bus_space_copy_region_2(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=2, o2+=2) bus_space_write_2(t, h1, o1, bus_space_read_2(t, h2, o2)); } static __inline__ void bus_space_copy_region_4(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=4, o2+=4) bus_space_write_4(t, h1, o1, bus_space_read_4(t, h2, o2)); } static __inline__ void bus_space_copy_region_8(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=8, o2+=8) bus_space_write_8(t, h1, o1, bus_space_read_8(t, h2, o2)); } /* * u_intN_t bus_space_read_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset)); * * Read a 1, 2, 4, or 8 byte quantity from bus space * described by tag/handle/offset. */ #ifndef BUS_SPACE_DEBUG #define bus_space_read_stream_1(t, h, o) \ lduba_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]) #define bus_space_read_stream_2(t, h, o) \ lduha_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]) #define bus_space_read_stream_4(t, h, o) \ lduwa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]) #define bus_space_read_stream_8(t, h, o) \ ldxa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]) #else #define bus_space_read_stream_1(t, h, o) ({ \ unsigned char __bv = \ lduba_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr1(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (unsigned int) __bv); \ __bv; }) #define bus_space_read_stream_2(t, h, o) ({ \ unsigned short __bv = \ lduha_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr2(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (unsigned int)__bv); \ __bv; }) #define bus_space_read_stream_4(t, h, o) ({ \ unsigned int __bv = \ lduwa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr4(%llx + %llx, %x) -> %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], __bv); \ __bv; }) #define bus_space_read_stream_8(t, h, o) ({ \ u_int64_t __bv = \ ldxa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type]); \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsr8(%llx + %llx, %x) -> %llx\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], __bv); \ __bv; }) #endif /* * void bus_space_read_multi_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t *addr, size_t count)); * * Read `count' 1, 2, 4, or 8 byte quantities from bus space * described by tag/handle/offset and copy into buffer provided. */ #define bus_space_read_multi_stream_1(t, h, o, a, c) do { \ int i = c; \ u_int8_t *p = (u_int8_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_stream_1(t, h, o); \ } while (0) #define bus_space_read_multi_stream_2(t, h, o, a, c) do { \ int i = c; \ u_int16_t *p = (u_int16_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_stream_2(t, h, o); \ } while (0) #define bus_space_read_multi_stream_4(t, h, o, a, c) do { \ int i = c; \ u_int32_t *p = (u_int32_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_stream_4(t, h, o); \ } while (0) #define bus_space_read_multi_stream_8(t, h, o, a, c) do { \ int i = c; \ u_int64_t *p = (u_int64_t *)a; \ while (i-- > 0) \ *p++ = bus_space_read_stream_8(t, h, o); \ } while (0) /* * void bus_space_write_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_intN_t value)); * * Write the 1, 2, 4, or 8 byte value `value' to bus space * described by tag/handle/offset. */ #ifndef BUS_SPACE_DEBUG #define bus_space_write_stream_1(t, h, o, v) \ stba_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)) #define bus_space_write_stream_2(t, h, o, v) \ stha_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)) #define bus_space_write_stream_4(t, h, o, v) \ stwa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)) #define bus_space_write_stream_8(t, h, o, v) \ stxa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)) #else #define bus_space_write_stream_1(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw1(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (unsigned int) v); \ stba_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_stream_2(t, h, o, v) do { \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw2(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (unsigned int) v); \ stha_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_stream_4(t, h, o, v) ({ \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw4(%llx + %llx, %x) <- %x\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (unsigned int) v); \ stwa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)); \ } while (0) #define bus_space_write_stream_8(t, h, o, v) ({ \ if (bus_space_debug & BSDB_ACCESS) \ printf("bsw8(%llx + %llx, %x) <- %llx\n", (u_int64_t)(h), \ (u_int64_t)(o), \ bus_stream_asi[(t)->type], (u_int64_t) v); \ stxa_nc((caddr_t)((h) + (o)), bus_stream_asi[(t)->type], (v)); \ } while (0) #endif /* * void bus_space_write_multi_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_intN_t *addr, size_t count)); * * Write `count' 1, 2, 4, or 8 byte quantities from the buffer * provided to bus space described by tag/handle/offset. */ #define bus_space_write_multi_stream_1(t, h, o, a, c) do { \ int i = c; \ u_int8_t *p = (u_int8_t *)a; \ while (i-- > 0) \ bus_space_write_stream_1(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_stream_2(t, h, o, a, c) do { \ int i = c; \ u_int16_t *p = (u_int16_t *)a; \ while (i-- > 0) \ bus_space_write_stream_2(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_stream_4(t, h, o, a, c) do { \ int i = c; \ u_int32_t *p = (u_int32_t *)a; \ while (i-- > 0) \ bus_space_write_stream_4(t, h, o, *p++); \ } while (0) #define bus_space_write_multi_stream_8(t, h, o, a, c) do { \ int i = c; \ u_int64_t *p = (u_int64_t *)a; \ while (i-- > 0) \ bus_space_write_stream_8(t, h, o, *p++); \ } while (0) /* * void bus_space_set_multi_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, * size_t count)); * * Write the 1, 2, 4, or 8 byte value `val' to bus space described * by tag/handle/offset `count' times. */ #define bus_space_set_multi_stream_1(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_stream_1(t, h, o, v); \ } while (0) #define bus_space_set_multi_stream_2(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_stream_2(t, h, o, v); \ } while (0) #define bus_space_set_multi_stream_4(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_stream_4(t, h, o, v); \ } while (0) #define bus_space_set_multi_stream_8(t, h, o, v, c) do { \ int i = c; \ while (i-- > 0) \ bus_space_write_stream_8(t, h, o, v); \ } while (0) /* * void bus_space_read_region_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_read_region_stream_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t)); static void bus_space_read_region_stream_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t)); static void bus_space_read_region_stream_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t)); static void bus_space_read_region_stream_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t)); static __inline__ void bus_space_read_region_stream_1(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int8_t *a; { for (; c; a++, c--, o++) *a = bus_space_read_stream_1(t, h, o); } static __inline__ void bus_space_read_region_stream_2(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int16_t *a; { for (; c; a++, c--, o+=2) *a = bus_space_read_stream_2(t, h, o); } static __inline__ void bus_space_read_region_stream_4(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int32_t *a; { for (; c; a++, c--, o+=4) *a = bus_space_read_stream_4(t, h, o); } static __inline__ void bus_space_read_region_stream_8(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; u_int64_t *a; { for (; c; a++, c--, o+=8) *a = bus_space_read_stream_8(t, h, o); } /* * void bus_space_write_region_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_write_region_stream_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t)); static void bus_space_write_region_stream_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t)); static void bus_space_write_region_stream_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t)); static void bus_space_write_region_stream_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t)); static __inline__ void bus_space_write_region_stream_1(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int8_t *a; { for (; c; a++, c--, o++) bus_space_write_stream_1(t, h, o, *a); } static __inline__ void bus_space_write_region_stream_2(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int16_t *a; { for (; c; a++, c--, o+=2) bus_space_write_stream_2(t, h, o, *a); } static __inline__ void bus_space_write_region_stream_4(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int32_t *a; { for (; c; a++, c--, o+=4) bus_space_write_stream_4(t, h, o, *a); } static __inline__ void bus_space_write_region_stream_8(t, h, o, a, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int64_t *a; { for (; c; a++, c--, o+=8) bus_space_write_stream_8(t, h, o, *a); } /* * void bus_space_set_region_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t off, * u_intN_t *addr, bus_size_t count)); * */ static void bus_space_set_region_stream_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int8_t, bus_size_t)); static void bus_space_set_region_stream_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int16_t, bus_size_t)); static void bus_space_set_region_stream_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int32_t, bus_size_t)); static void bus_space_set_region_stream_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, const u_int64_t, bus_size_t)); static __inline__ void bus_space_set_region_stream_1(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int8_t v; { for (; c; c--, o++) bus_space_write_stream_1(t, h, o, v); } static __inline__ void bus_space_set_region_stream_2(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int16_t v; { for (; c; c--, o+=2) bus_space_write_stream_2(t, h, o, v); } static __inline__ void bus_space_set_region_stream_4(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int32_t v; { for (; c; c--, o+=4) bus_space_write_stream_4(t, h, o, v); } static __inline__ void bus_space_set_region_stream_8(t, h, o, v, c) bus_space_tag_t t; bus_space_handle_t h; bus_size_t o, c; const u_int64_t v; { for (; c; c--, o+=8) bus_space_write_stream_8(t, h, o, v); } /* * void bus_space_copy_region_stream_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh1, bus_size_t off1, * bus_space_handle_t bsh2, bus_size_t off2, * bus_size_t count)); * * Copy `count' 1, 2, 4, or 8 byte values from bus space starting * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. */ static void bus_space_copy_region_stream_1 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_stream_2 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_stream_4 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static void bus_space_copy_region_stream_8 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t)); static __inline__ void bus_space_copy_region_stream_1(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1++, o2++) bus_space_write_stream_1(t, h1, o1, bus_space_read_stream_1(t, h2, o2)); } static __inline__ void bus_space_copy_region_stream_2(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=2, o2+=2) bus_space_write_stream_2(t, h1, o1, bus_space_read_stream_2(t, h2, o2)); } static __inline__ void bus_space_copy_region_stream_4(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=4, o2+=4) bus_space_write_stream_4(t, h1, o1, bus_space_read_stream_4(t, h2, o2)); } static __inline__ void bus_space_copy_region_stream_8(t, h1, o1, h2, o2, c) bus_space_tag_t t; bus_space_handle_t h1, h2; bus_size_t o1, o2; bus_size_t c; { for (; c; c--, o1+=8, o2+=8) bus_space_write_stream_8(t, h1, o1, bus_space_read_8(t, h2, o2)); } #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) /* Back-compat functions for old ISA drivers */ extern bus_space_tag_t isa_io_bt; extern bus_space_handle_t isa_io_hdl; extern bus_space_tag_t isa_mem_bt; extern bus_space_handle_t isa_mem_hdl; #define inb(o) bus_space_read_1(isa_io_bt, isa_io_hdl, o) #define inw(o) bus_space_read_2(isa_io_bt, isa_io_hdl, o) #define inl(o) bus_space_read_4(isa_io_bt, isa_io_hdl, o) #if 0 #define outb(o, v) do { \ printf("outb used at %s:%d, address 0x%x -> 0x%lx\n", \ __func__, __LINE__, o, (unsigned long)isa_io_hdl + o); \ bus_space_write_1(isa_io_bt, isa_io_hdl, o, v); \ } while (0) #else #define outb(o, v) bus_space_write_1(isa_io_bt, isa_io_hdl, o, v) #endif #define outw(o, v) bus_space_write_2(isa_io_bt, isa_io_hdl, o, v) #define outl(o, v) bus_space_write_4(isa_io_bt, isa_io_hdl, o, v) #define readb(o) bus_space_read_1(isa_mem_bt, isa_mem_hdl, o) #define readw(o) bus_space_read_2(isa_mem_bt, isa_mem_hdl, o) #define readl(o) bus_space_read_4(isa_mem_bt, isa_mem_hdl, o) #define writeb(o, v) bus_space_write_1(isa_mem_bt, isa_mem_hdl, o, v) #define writew(o, v) bus_space_write_2(isa_mem_bt, isa_mem_hdl, o, v) #define writel(o, v) bus_space_write_4(isa_mem_bt, isa_mem_hdl, o, v) #define insb(o, a, c) \ bus_space_read_multi_1(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define insw(o, a, c) \ bus_space_read_multi_2(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define insl(o, a, c) \ bus_space_read_multi_4(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define outsb(o, a, c) \ bus_space_write_multi_1(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define outsw(o, a, c) \ bus_space_write_multi_2(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define outsl(o, a, c) \ bus_space_write_multi_4(isa_io_bt, isa_io_hdl, o, (void*)a, c) #define memcpy_fromio(d, s, c) \ bus_space_read_region_1(isa_mem_bt, isa_mem_hdl, s, d, c) #define memcpy_toio(d, s, c) \ bus_space_write_region_1(isa_mem_bt, isa_mem_hdl, d, s, c) #define memcpy_io(d, s, c) \ bus_space_copy_region_1(isa_mem_bt, isa_mem_hdl, s, isa_mem_hdl, d, c) #define memset_io(d, v, c) \ bus_space_set_region_1(isa_mem_bt, isa_mem_hdl, d, v, c) #define memsetw_io(d, v, c) \ bus_space_set_region_2(isa_mem_bt, isa_mem_hdl, d, v, c) static __inline void memsetw(void *d, int val, size_t size) { u_int16_t *sp = d; while (size--) *sp++ = val; } /* DMA support */ /* * Flags used in various bus DMA methods. */ #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ #define BUS_DMAMEM_NOSYNC 0x004 /* map memory to not require sync */ #define BUS_DMA_NOWRITE 0x008 #define BUS_DMA_BUS1 0x010 #define BUS_DMA_BUS2 0x020 #define BUS_DMA_BUS3 0x040 #define BUS_DMA_BUS4 0x080 /* * The following flags are from NetBSD, but are not implemented for all * architetures, and should therefore not be used in MI code. * Some have different values than under NetBSD. */ #define BUS_DMA_STREAMING 0x100 /* hint: sequential, unidirectional */ #define BUS_DMA_READ 0x200 /* mapping is device -> memory only */ #define BUS_DMA_WRITE 0x400 /* mapping is memory -> device only */ #define BUS_DMA_COHERENT 0x800 /* hint: map memory DMA coherent */ #define BUS_DMA_NOCACHE BUS_DMA_BUS1 /* Don't bother with alignment */ #define BUS_DMA_DVMA BUS_DMA_BUS2 /* Forwards needed by prototypes below. */ struct mbuf; struct uio; /* * bus_dmasync_op_t * * Operations performed by bus_dmamap_sync(). */ typedef enum { BUS_DMASYNC_PREREAD, BUS_DMASYNC_POSTREAD, BUS_DMASYNC_PREWRITE, BUS_DMASYNC_POSTWRITE, } bus_dmasync_op_t; /* * A function that returns 1 if the address cannot be accessed by * a device and 0 if it can be. */ typedef int bus_dma_filter_t(void *, bus_addr_t); typedef struct bus_dma_tag *bus_dma_tag_t; typedef struct bus_dmamap *bus_dmamap_t; /* * bus_dma_segment_t * * Describes a single contiguous DMA transaction. Values * are suitable for programming into DMA registers. */ struct bus_dma_segment { bus_addr_t ds_addr; /* DVMA address */ bus_size_t ds_len; /* length of transfer */ }; typedef struct bus_dma_segment bus_dma_segment_t; /* * A function that processes a successfully loaded dma map or an error * from a delayed load map. */ typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int); /* * bus_dma_tag_t * * A machine-dependent opaque type describing the implementation of * DMA for a given bus. */ struct bus_dma_tag { void *cookie; /* cookie used in the guts */ bus_dma_tag_t parent; bus_size_t alignment; bus_size_t boundary; bus_addr_t lowaddr; bus_addr_t highaddr; bus_dma_filter_t *filter; void *filterarg; bus_size_t maxsize; u_int nsegments; bus_size_t maxsegsz; int flags; int ref_count; int map_count; /* * DMA mapping methods. */ int (*dmamap_create) __P((bus_dma_tag_t, int, bus_dmamap_t *)); int (*dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t)); int (*dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, bus_dmamap_callback_t *, void *, int)); void (*dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t)); void (*dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t)); /* * DMA memory utility functions. */ int (*dmamem_alloc) __P((bus_dma_tag_t, void **, int, bus_dmamap_t *)); void (*dmamem_free) __P((bus_dma_tag_t, void *, bus_dmamap_t)); }; /* * XXX: This is a kluge. It would be better to handle dma tags in a hierarchical * way, and have a BUS_GET_DMA_TAG(); however, since this is not currently the * case, save a root tag in the relevant bus attach function and use that. * Keep the hierarchical structure, it might become needed in the future. */ extern bus_dma_tag_t sparc64_root_dma_tag; int bus_dma_tag_create(bus_dma_tag_t, bus_size_t, bus_size_t, bus_addr_t, bus_addr_t, bus_dma_filter_t *, void *, bus_size_t, int, bus_size_t, int, bus_dma_tag_t *); int bus_dma_tag_destroy(bus_dma_tag_t); int sparc64_dmamem_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp); void sparc64_dmamem_free_map(bus_dma_tag_t dmat, bus_dmamap_t map); #define bus_dmamap_create(t, f, p) \ (*(t)->dmamap_create)((t), (f), (p)) #define bus_dmamap_destroy(t, p) \ (*(t)->dmamap_destroy)((t), (p)) #define bus_dmamap_load(t, m, p, s, cb, cba, f) \ (*(t)->dmamap_load)((t), (m), (p), (s), (cb), (cba), (f)) #define bus_dmamap_unload(t, p) \ (*(t)->dmamap_unload)((t), (p)) #define bus_dmamap_sync(t, m, op) \ (void)((t)->dmamap_sync ? \ (*(t)->dmamap_sync)((t), (m), (op)) : (void)0) #define bus_dmamem_alloc(t, v, f, m) \ (*(t)->dmamem_alloc)((t), (v), (f), (m)) #define bus_dmamem_free(t, v, m) \ (*(t)->dmamem_free)((t), (v), (m)) /* * bus_dmamap_t * * Describes a DMA mapping. */ struct bus_dmamap { bus_dma_tag_t dmat; void *buf; /* unmapped buffer pointer */ bus_size_t buflen; /* unmapped buffer length */ bus_addr_t start; /* start of mapped region */ struct resource *res; /* associated resource */ }; #endif /* !_MACHINE_BUS_H_ */