/* $NetBSD: bus_space.c,v 1.10 2008/04/28 20:23:13 martin Exp $ */ /* NetBSD: bus_machdep.c,v 1.1 2000/01/26 18:48:00 drochner Exp */ /*- * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum and 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. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.10 2008/04/28 20:23:13 martin Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/malloc.h> #include <sys/extent.h> #include <uvm/uvm_extern.h> #include <machine/bus.h> void arc_bus_space_init(bus_space_tag_t bst, const char *name, paddr_t paddr, vaddr_t vaddr, bus_addr_t start, bus_size_t size) { bst->bs_name = name; bst->bs_extent = NULL; bst->bs_start = start; bst->bs_size = size; bst->bs_pbase = paddr; bst->bs_vbase = vaddr; bst->bs_compose_handle = arc_bus_space_compose_handle; bst->bs_dispose_handle = arc_bus_space_dispose_handle; bst->bs_paddr = arc_bus_space_paddr; bst->bs_map = arc_bus_space_map; bst->bs_unmap = arc_bus_space_unmap; bst->bs_subregion = arc_bus_space_subregion; bst->bs_mmap = arc_bus_space_mmap; bst->bs_alloc = arc_bus_space_alloc; bst->bs_free = arc_bus_space_free; bst->bs_aux = NULL; bst->bs_stride_1 = 0; bst->bs_stride_2 = 0; bst->bs_stride_4 = 0; bst->bs_stride_8 = 0; } void arc_bus_space_init_extent(bus_space_tag_t bst, void *storage, size_t storagesize) { bst->bs_extent = extent_create(bst->bs_name, bst->bs_start, bst->bs_start + bst->bs_size, M_DEVBUF, storage, storagesize, EX_NOWAIT); if (bst->bs_extent == NULL) panic("arc_bus_space_init_extent: cannot create extent map %s", bst->bs_name); } void arc_bus_space_set_aligned_stride(bus_space_tag_t bst, unsigned int alignment_shift) { bst->bs_stride_1 = alignment_shift; if (alignment_shift > 0) --alignment_shift; bst->bs_stride_2 = alignment_shift; if (alignment_shift > 0) --alignment_shift; bst->bs_stride_4 = alignment_shift; if (alignment_shift > 0) --alignment_shift; bst->bs_stride_8 = alignment_shift; } static int malloc_safe = 0; void arc_bus_space_malloc_set_safe(void) { malloc_safe = EX_MALLOCOK; } int arc_bus_space_extent_malloc_flag(void) { return malloc_safe; } int arc_bus_space_compose_handle(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *bshp) { bus_space_handle_t bsh = bst->bs_vbase + (addr - bst->bs_start); /* * Since all buses can be linearly mappable, we don't have to check * BUS_SPACE_MAP_LINEAR and BUS_SPACE_MAP_PREFETCHABLE. */ if ((flags & BUS_SPACE_MAP_CACHEABLE) == 0) { *bshp = bsh; return 0; } if (bsh < MIPS_KSEG1_START) /* KUSEG or KSEG0 */ panic("arc_bus_space_compose_handle: bad address 0x%x", bsh); if (bsh < MIPS_KSEG2_START) { /* KSEG1 */ *bshp = MIPS_PHYS_TO_KSEG0(MIPS_KSEG1_TO_PHYS(bsh)); return 0; } /* * KSEG2: * Do not make the page cacheable in this case, since: * - the page which this bus_space belongs might include * other bus_spaces. * or * - this bus might be mapped by wired TLB, in that case, * we cannot manupulate cacheable attribute with page granularity. */ #ifdef DIAGNOSTIC printf("arc_bus_space_compose_handle: ignore cacheable 0x%x\n", bsh); #endif *bshp = bsh; return 0; } int arc_bus_space_dispose_handle(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t size) { return 0; } int arc_bus_space_paddr(bus_space_tag_t bst, bus_space_handle_t bsh, paddr_t *pap) { if (bsh < MIPS_KSEG0_START) /* KUSEG */ panic("arc_bus_space_paddr(0x%qx): bad address", (unsigned long long) bsh); else if (bsh < MIPS_KSEG1_START) /* KSEG0 */ *pap = MIPS_KSEG0_TO_PHYS(bsh); else if (bsh < MIPS_KSEG2_START) /* KSEG1 */ *pap = MIPS_KSEG1_TO_PHYS(bsh); else { /* KSEG2 */ /* * Since this region may be mapped by wired TLB, * kvtophys() is not always available. */ *pap = bst->bs_pbase + (bsh - bst->bs_vbase); } return 0; } int arc_bus_space_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *bshp) { int err; if (addr < bst->bs_start || addr + size > bst->bs_start + bst->bs_size) return EINVAL; if (bst->bs_extent != NULL) { err = extent_alloc_region(bst->bs_extent, addr, size, EX_NOWAIT | malloc_safe); if (err) return err; } return bus_space_compose_handle(bst, addr, size, flags, bshp); } void arc_bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t size) { if (bst->bs_extent != NULL) { paddr_t pa; bus_addr_t addr; int err; /* bus_space_paddr() becomes unavailable after unmapping */ err = bus_space_paddr(bst, bsh, &pa); if (err) panic("arc_bus_space_unmap: %s va 0x%qx: error %d", bst->bs_name, (unsigned long long) bsh, err); addr = (bus_size_t)(pa - bst->bs_pbase) + bst->bs_start; extent_free(bst->bs_extent, addr, size, EX_NOWAIT | malloc_safe); } bus_space_dispose_handle(bst, bsh, size); } int arc_bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) { *nbshp = bsh + offset; return 0; } paddr_t arc_bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off, int prot, int flags) { /* * XXX We do not disallow mmap'ing of EISA/PCI I/O space here, * XXX which we should be doing. */ if (addr < bst->bs_start || (addr + off) >= (bst->bs_start + bst->bs_size)) return -1; return mips_btop(bst->bs_pbase + (addr - bst->bs_start) + off); } int arc_bus_space_alloc(bus_space_tag_t bst, bus_addr_t start, bus_addr_t end, bus_size_t size, bus_size_t align, bus_size_t boundary, int flags, bus_addr_t *addrp, bus_space_handle_t *bshp) { u_long addr; int err; if (bst->bs_extent == NULL) panic("arc_bus_space_alloc: extent map %s not available", bst->bs_name); if (start < bst->bs_start || start + size > bst->bs_start + bst->bs_size) return EINVAL; err = extent_alloc_subregion(bst->bs_extent, start, end, size, align, boundary, EX_FAST | EX_NOWAIT | malloc_safe, &addr); if (err) return err; *addrp = addr; return bus_space_compose_handle(bst, addr, size, flags, bshp); }