The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i8134x/i81342_space.c

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    1 /*      $NetBSD: i80321_space.c,v 1.6 2003/10/06 15:43:35 thorpej Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * bus_space functions for i81342 I/O Processor.
   40  */
   41 
   42 #include <sys/cdefs.h>
   43 __FBSDID("$FreeBSD$");
   44 
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/bus.h>
   48 #include <sys/malloc.h>
   49 
   50 #include <machine/pcb.h>
   51 
   52 #include <vm/vm.h>
   53 #include <vm/vm_kern.h>
   54 #include <vm/pmap.h>
   55 #include <vm/vm_page.h>
   56 #include <vm/vm_extern.h>
   57 
   58 #include <machine/bus.h>
   59 
   60 #include <arm/xscale/i8134x/i81342reg.h>
   61 #include <arm/xscale/i8134x/i81342var.h>
   62 
   63 /* Prototypes for all the bus_space structure functions */
   64 bs_protos(i81342);
   65 bs_protos(i81342_io);
   66 bs_protos(i81342_mem);
   67 bs_protos(generic);
   68 bs_protos(generic_armv4);
   69 
   70 /*
   71  * Template bus_space -- copied, and the bits that are NULL are
   72  * filled in.
   73  */
   74 const struct bus_space i81342_bs_tag_template = {
   75         /* cookie */
   76         (void *) 0,
   77 
   78         /* mapping/unmapping */
   79         NULL,
   80         NULL,
   81         i81342_bs_subregion,
   82 
   83         /* allocation/deallocation */
   84         NULL,
   85         NULL,
   86 
   87         /* barrier */
   88         i81342_bs_barrier,
   89 
   90         /* read (single) */
   91         generic_bs_r_1,
   92         generic_armv4_bs_r_2,
   93         generic_bs_r_4,
   94         NULL,
   95 
   96         /* read multiple */
   97         generic_bs_rm_1,
   98         generic_armv4_bs_rm_2,
   99         generic_bs_rm_4,
  100         NULL,
  101 
  102         /* read region */
  103         generic_bs_rr_1,
  104         generic_armv4_bs_rr_2,
  105         generic_bs_rr_4,
  106         NULL,
  107 
  108         /* write (single) */
  109         generic_bs_w_1,
  110         generic_armv4_bs_w_2,
  111         generic_bs_w_4,
  112         NULL,
  113 
  114         /* write multiple */
  115         generic_bs_wm_1,
  116         generic_armv4_bs_wm_2,
  117         generic_bs_wm_4,
  118         NULL,
  119 
  120         /* write region */
  121         NULL,
  122         generic_armv4_bs_wr_2,
  123         generic_bs_wr_4,
  124         NULL,
  125 
  126         /* set multiple */
  127         NULL,
  128         NULL,
  129         NULL,
  130         NULL,
  131 
  132         /* set region */
  133         NULL,
  134         generic_armv4_bs_sr_2,
  135         generic_bs_sr_4,
  136         NULL,
  137 
  138         /* copy */
  139         NULL,
  140         generic_armv4_bs_c_2,
  141         NULL,
  142         NULL,
  143 
  144         /* read (single) stream */
  145         generic_bs_r_1,
  146         generic_armv4_bs_r_2,
  147         generic_bs_r_4,
  148         NULL,
  149 
  150         /* read multiple stream */
  151         generic_bs_rm_1,
  152         generic_armv4_bs_rm_2,
  153         generic_bs_rm_4,
  154         NULL,
  155 
  156         /* read region stream */
  157         generic_bs_rr_1,
  158         generic_armv4_bs_rr_2,
  159         generic_bs_rr_4,
  160         NULL,
  161 
  162         /* write (single) stream */
  163         generic_bs_w_1,
  164         generic_armv4_bs_w_2,
  165         generic_bs_w_4,
  166         NULL,
  167 
  168         /* write multiple stream */
  169         generic_bs_wm_1,
  170         generic_armv4_bs_wm_2,
  171         generic_bs_wm_4,
  172         NULL,
  173 
  174         /* write region stream */
  175         NULL,
  176         generic_armv4_bs_wr_2,
  177         generic_bs_wr_4,
  178         NULL,
  179 };
  180 
  181 void
  182 i81342_bs_init(bus_space_tag_t bs, void *cookie)
  183 {
  184 
  185         *bs = i81342_bs_tag_template;
  186         bs->bs_cookie = cookie;
  187 }
  188 
  189 void
  190 i81342_io_bs_init(bus_space_tag_t bs, void *cookie)
  191 {
  192 
  193         *bs = i81342_bs_tag_template;
  194         bs->bs_cookie = cookie;
  195 
  196         bs->bs_map = i81342_io_bs_map;
  197         bs->bs_unmap = i81342_io_bs_unmap;
  198         bs->bs_alloc = i81342_io_bs_alloc;
  199         bs->bs_free = i81342_io_bs_free;
  200 
  201 }
  202 
  203 void
  204 i81342_mem_bs_init(bus_space_tag_t bs, void *cookie)
  205 {
  206 
  207         *bs = i81342_bs_tag_template;
  208         bs->bs_cookie = cookie;
  209 
  210         bs->bs_map = i81342_mem_bs_map;
  211         bs->bs_unmap = i81342_mem_bs_unmap;
  212         bs->bs_alloc = i81342_mem_bs_alloc;
  213         bs->bs_free = i81342_mem_bs_free;
  214 
  215 }
  216 
  217 /* *** Routines shared by i81342, PCI IO, and PCI MEM. *** */
  218 
  219 int
  220 i81342_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
  221     bus_size_t size, bus_space_handle_t *nbshp)
  222 {
  223 
  224         *nbshp = bsh + offset;
  225         return (0);
  226 }
  227 
  228 void
  229 i81342_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
  230     bus_size_t len, int flags)
  231 {
  232 
  233         /* Nothing to do. */
  234 }
  235 
  236 /* *** Routines for PCI IO. *** */
  237 
  238 int
  239 i81342_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
  240     bus_space_handle_t *bshp)
  241 {
  242 
  243         *bshp = bpa;
  244         return (0);
  245 }
  246 
  247 void
  248 i81342_io_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
  249 {
  250 
  251         /* Nothing to do. */
  252 }
  253 
  254 int
  255 i81342_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
  256     bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
  257     bus_addr_t *bpap, bus_space_handle_t *bshp)
  258 {
  259 
  260         panic("i81342_io_bs_alloc(): not implemented");
  261 }
  262 
  263 void    
  264 i81342_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  265 {
  266 
  267         panic("i81342_io_bs_free(): not implemented");
  268 }
  269 
  270 
  271 /* *** Routines for PCI MEM. *** */
  272 extern int badaddr_read(void *, int, void *);
  273 static vm_offset_t allocable = 0xe1000000;
  274 int
  275 i81342_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
  276     bus_space_handle_t *bshp)
  277 {
  278         struct i81342_pci_softc *sc = (struct i81342_pci_softc *)t;
  279         struct i81342_pci_map *tmp;
  280         vm_offset_t addr, endaddr;
  281         vm_paddr_t paddr;
  282 
  283         /* Lookup to see if we already have a mapping at this address. */
  284         tmp = sc->sc_pci_mappings;
  285         while (tmp) {
  286                 if (tmp->paddr <= bpa && tmp->paddr + tmp->size >
  287                     bpa + size) {
  288                         *bshp = bpa - tmp->paddr + tmp->vaddr;
  289                         return (0);
  290                 }
  291                 tmp = tmp->next;
  292         }
  293         addr = allocable;
  294         endaddr = ((addr + size) &~ (0x1000000 - 1)) + 0x1000000;
  295         if (endaddr >= IOP34X_VADDR)
  296                 panic("PCI virtual memory exhausted");
  297         allocable = endaddr;
  298         tmp = malloc(sizeof(*tmp), M_DEVBUF, M_WAITOK);
  299         tmp->next = NULL;
  300         paddr = bpa &~ (0x100000 - 1);
  301         tmp->paddr = paddr;
  302         tmp->vaddr = addr;
  303         tmp->size = 0;
  304         while (addr < endaddr) {
  305                 pmap_kenter_supersection(addr, paddr + (sc->sc_is_atux ?
  306                     IOP34X_PCIX_OMBAR : IOP34X_PCIE_OMBAR), 0);
  307                 addr += 0x1000000;
  308                 paddr += 0x1000000;
  309                 tmp->size += 0x1000000;
  310         }
  311         tmp->next = sc->sc_pci_mappings;
  312         sc->sc_pci_mappings = tmp;
  313         *bshp = bpa - tmp->paddr + tmp->vaddr;
  314         return (0);
  315 }
  316 
  317 void
  318 i81342_mem_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
  319 {
  320 #if 0
  321         vm_offset_t va, endva;
  322 
  323         va = trunc_page((vm_offset_t)t);
  324         endva = va + round_page(size);
  325 
  326         /* Free the kernel virtual mapping. */
  327         kmem_free(kernel_map, va, endva - va);
  328 #endif
  329 }
  330 
  331 int
  332 i81342_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
  333     bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
  334     bus_addr_t *bpap, bus_space_handle_t *bshp)
  335 {
  336 
  337         panic("i81342_mem_bs_alloc(): not implemented");
  338 }
  339 
  340 void    
  341 i81342_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  342 {
  343 
  344         panic("i81342_mem_bs_free(): not implemented");
  345 }

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