/* $NetBSD: bus.h,v 1.1 2011/01/26 01:18:51 pooka Exp $ */ /*- * 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. * * 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. */ #ifndef _EMIPS_BUS_H_ #define _EMIPS_BUS_H_ #include /* * Utility macros; do not use outside this file. */ #define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(u_int,BITS) #define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t) /* * Bus address and size types */ typedef u_long bus_addr_t; typedef u_long bus_size_t; /* * Access methods for bus resources and address space. */ typedef int bus_space_tag_t; typedef u_long bus_space_handle_t; /* * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, * bus_size_t size, int flags, bus_space_handle_t *bshp); * * Map a region of bus space. */ #define BUS_SPACE_MAP_CACHEABLE 0x01 #define BUS_SPACE_MAP_LINEAR 0x02 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, bus_space_handle_t *); /* * void bus_space_unmap(bus_space_tag_t t, * bus_space_handle_t bsh, bus_size_t size); * * Unmap a region of bus space. */ void bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); /* * int bus_space_subregion(bus_space_tag_t t, * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, * bus_space_handle_t *nbshp); * * Get a new handle for a subregion of an already-mapped area of bus space. */ int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp); /* * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart, * bus_addr_t rend, bus_size_t size, bus_size_t align, * bus_size_t boundary, int flags, bus_addr_t *addrp, * bus_space_handle_t *bshp); * * Allocate a region of bus space. */ int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, bus_size_t align, bus_size_t boundary, int cacheable, bus_addr_t *addrp, bus_space_handle_t *bshp); /* * int bus_space_free(bus_space_tag_t t, * bus_space_handle_t bsh, bus_size_t size); * * Free a region of bus space. */ void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size); /* * void *bus_space_vaddr(bus_space_tag_t, bus_space_handle_t); * * Get the kernel virtual address for the mapped bus space. * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR. * (XXX not enforced) */ #define bus_space_vaddr(t, h) \ ((void *)(h)) /* * u_intN_t bus_space_read_N(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. */ #define bus_space_read_1(t, h, o) \ ((void) t, (*(volatile u_int8_t *)((h) + (o)))) #define bus_space_read_2(t, h, o) \ ((void) t, (*(volatile u_int16_t *)((h) + (o)))) #define bus_space_read_4(t, h, o) \ ((void) t, (*(volatile u_int32_t *)((h) + (o)))) #if 0 /* Cause a link error for bus_space_read_8 */ #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! #endif /* * void bus_space_read_multi_N(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 __EMIPS_bus_space_read_multi(BYTES,BITS) \ static __inline void __CONCAT(bus_space_read_multi_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS) *, size_t); \ \ static __inline void \ __CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) *a; \ size_t c; \ { \ \ while (c--) \ *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ } __EMIPS_bus_space_read_multi(1,8) __EMIPS_bus_space_read_multi(2,16) __EMIPS_bus_space_read_multi(4,32) #if 0 /* Cause a link error for bus_space_read_multi_8 */ #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! #endif #undef __EMIPS_bus_space_read_multi /* * void bus_space_read_region_N(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 and starting at `offset' and copy into * buffer provided. */ #define __EMIPS_bus_space_read_region(BYTES,BITS) \ static __inline void __CONCAT(bus_space_read_region_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS) *, size_t); \ \ static __inline void \ __CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) *a; \ size_t c; \ { \ \ while (c--) { \ *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ o += BYTES; \ } \ } __EMIPS_bus_space_read_region(1,8) __EMIPS_bus_space_read_region(2,16) __EMIPS_bus_space_read_region(4,32) #if 0 /* Cause a link error for bus_space_read_region_8 */ #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! #endif #undef __EMIPS_bus_space_read_region /* * void bus_space_write_N(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. */ #define bus_space_write_1(t, h, o, v) \ do { \ (void) t; \ *(volatile u_int8_t *)((h) + (o)) = (v); \ wbflush(); /* XXX */ \ } while (0) #define bus_space_write_2(t, h, o, v) \ do { \ (void) t; \ *(volatile u_int16_t *)((h) + (o)) = (v); \ wbflush(); /* XXX */ \ } while (0) #define bus_space_write_4(t, h, o, v) \ do { \ (void) t; \ *(volatile u_int32_t *)((h) + (o)) = (v); \ wbflush(); /* XXX */ \ } while (0) #if 0 /* Cause a link error for bus_space_write_8 */ #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! #endif /* * void bus_space_write_multi_N(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 __EMIPS_bus_space_write_multi(BYTES,BITS) \ static __inline void __CONCAT(bus_space_write_multi_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS) *, size_t); \ \ static __inline void \ __CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) *a; \ size_t c; \ { \ \ while (c--) \ __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ } __EMIPS_bus_space_write_multi(1,8) __EMIPS_bus_space_write_multi(2,16) __EMIPS_bus_space_write_multi(4,32) #if 0 /* Cause a link error for bus_space_write_8 */ #define bus_space_write_multi_8(t, h, o, a, c) \ !!! bus_space_write_multi_8 unimplimented !!! #endif #undef __EMIPS_bus_space_write_multi /* * void bus_space_write_region_N(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 starting at `offset'. */ #define __EMIPS_bus_space_write_region(BYTES,BITS) \ static __inline void __CONCAT(bus_space_write_region_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS) *, size_t); \ \ static __inline void \ __CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) *a; \ size_t c; \ { \ \ while (c--) { \ __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ o += BYTES; \ } \ } __EMIPS_bus_space_write_region(1,8) __EMIPS_bus_space_write_region(2,16) __EMIPS_bus_space_write_region(4,32) #if 0 /* Cause a link error for bus_space_write_region_8 */ #define bus_space_write_region_8 \ !!! bus_space_write_region_8 unimplemented !!! #endif #undef __EMIPS_bus_space_write_region /* * void bus_space_set_multi_N(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 __EMIPS_bus_space_set_multi(BYTES,BITS) \ static __inline void __CONCAT(bus_space_set_multi_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS), size_t); \ \ static __inline void \ __CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) v; \ size_t c; \ { \ \ while (c--) \ __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ } __EMIPS_bus_space_set_multi(1,8) __EMIPS_bus_space_set_multi(2,16) __EMIPS_bus_space_set_multi(4,32) #if 0 /* Cause a link error for bus_space_set_multi_8 */ #define bus_space_set_multi_8 \ !!! bus_space_set_multi_8 unimplemented !!! #endif #undef __EMIPS_bus_space_set_multi /* * void bus_space_set_region_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, * size_t count); * * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described * by tag/handle starting at `offset'. */ #define __EMIPS_bus_space_set_region(BYTES,BITS) \ static __inline void __CONCAT(bus_space_set_region_,BYTES) \ (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ __PB_TYPENAME(BITS), size_t); \ \ static __inline void \ __CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \ bus_space_tag_t t; \ bus_space_handle_t h; \ bus_size_t o; \ __PB_TYPENAME(BITS) v; \ size_t c; \ { \ \ while (c--) { \ __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ o += BYTES; \ } \ } __EMIPS_bus_space_set_region(1,8) __EMIPS_bus_space_set_region(2,16) __EMIPS_bus_space_set_region(4,32) #if 0 /* Cause a link error for bus_space_set_region_8 */ #define bus_space_set_region_8 \ !!! bus_space_set_region_8 unimplemented !!! #endif #undef __EMIPS_bus_space_set_region /* * void bus_space_copy_region_N(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. */ #define __EMIPS_copy_region(BYTES) \ static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ (bus_space_tag_t, \ bus_space_handle_t bsh1, bus_size_t off1, \ bus_space_handle_t bsh2, bus_size_t off2, \ bus_size_t count); \ \ static __inline void \ __CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \ bus_space_tag_t t; \ bus_space_handle_t h1, h2; \ bus_size_t o1, o2, c; \ { \ bus_size_t o; \ \ if ((h1 + o1) >= (h2 + o2)) { \ /* src after dest: copy forward */ \ for (o = 0; c != 0; c--, o += BYTES) \ __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ } else { \ /* dest after src: copy backwards */ \ for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ } \ } __EMIPS_copy_region(1) __EMIPS_copy_region(2) __EMIPS_copy_region(4) #if 0 /* Cause a link error for bus_space_copy_region_8 */ #define bus_space_copy_region_8 \ !!! bus_space_copy_region_8 unimplemented !!! #endif #undef __EMIPS_copy_region /* * Bus read/write barrier methods. * * void bus_space_barrier(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * bus_size_t len, int flags); * * On the MIPS, we just flush the write buffer. */ #define bus_space_barrier(t, h, o, l, f) \ ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ wbflush())) #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ #undef __PB_TYPENAME_PREFIX #undef __PB_TYPENAME #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) /* * 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_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ #define BUS_DMA_BUS2 0x020 #define BUS_DMA_BUS3 0x040 #define BUS_DMA_BUS4 0x080 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ #define EMIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ /* Forwards needed by prototypes below. */ struct mbuf; struct uio; /* * Operations performed by bus_dmamap_sync(). */ #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ typedef struct emips_bus_dma_tag *bus_dma_tag_t; typedef struct emips_bus_dmamap *bus_dmamap_t; #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) /* * bus_dma_segment_t * * Describes a single contiguous DMA transaction. Values * are suitable for programming into DMA registers. */ struct emips_bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ }; typedef struct emips_bus_dma_segment bus_dma_segment_t; /* * bus_dma_tag_t * * A machine-dependent opaque type describing the implementation of * DMA for a given bus. */ struct emips_bus_dma_tag { /* * DMA mapping methods. */ int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); /* * DMA memory utility functions. */ int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int); void (*_dmamem_free)(bus_dma_tag_t, bus_dma_segment_t *, int); int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, int, size_t, void **, int); void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, int, off_t, int, int); }; #define bus_dmamap_create(t, s, n, m, b, f, p) \ (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) #define bus_dmamap_destroy(t, p) \ (*(t)->_dmamap_destroy)((t), (p)) #define bus_dmamap_load(t, m, b, s, p, f) \ (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) #define bus_dmamap_load_mbuf(t, m, b, f) \ (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) #define bus_dmamap_load_uio(t, m, u, f) \ (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) #define bus_dmamap_unload(t, p) \ (*(t)->_dmamap_unload)((t), (p)) #define bus_dmamap_sync(t, p, o, l, ops) \ (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) #define bus_dmamem_free(t, sg, n) \ (*(t)->_dmamem_free)((t), (sg), (n)) #define bus_dmamem_map(t, sg, n, s, k, f) \ (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) #define bus_dmamem_unmap(t, k, s) \ (*(t)->_dmamem_unmap)((t), (k), (s)) #define bus_dmamem_mmap(t, sg, n, o, p, f) \ (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) #define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP #define bus_dmatag_destroy(t) /* * bus_dmamap_t * * Describes a DMA mapping. */ struct emips_bus_dmamap { /* * PRIVATE MEMBERS: not for use my machine-independent code. */ bus_size_t _dm_size; /* largest DMA transfer mappable */ int _dm_segcnt; /* number of segs this map can map */ bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ bus_size_t _dm_boundary; /* don't cross this */ int _dm_flags; /* misc. flags */ struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ /* * PUBLIC MEMBERS: these are used by machine-independent code. */ bus_size_t dm_maxsegsz; /* largest possible segment */ bus_size_t dm_mapsize; /* size of the mapping */ int dm_nsegs; /* # valid segments in mapping */ bus_dma_segment_t dm_segs[1]; /* segments; variable length */ }; #ifdef _EMIPS_BUS_DMA_PRIVATE void emips_bus_dma_init(void); int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); void _bus_dmamap_sync_r3k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); void _bus_dmamap_sync_r4k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs); int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, size_t size, void **kvap, int flags); void _bus_dmamem_unmap(bus_dma_tag_t tag, void *kva, size_t size); paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, off_t off, int prot, int flags); int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, vaddr_t low, vaddr_t high); extern struct emips_bus_dma_tag emips_default_bus_dma_tag; #endif /* _EMIPS_BUS_DMA_PRIVATE */ #endif /* !_EMIPS_BUS_H_ */