2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
29 * MD primitives supporting placement of module data
31 * XXX should check load address/size against memory top.
37 #define READIN_BUF (4 * 1024)
38 #define PAGE_SIZE 0x1000
39 #define PAGE_MASK 0x0fff
40 #define MAPMEM_PAGE_INC 128 /* Half-MB at a time */
43 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
46 ofw_mapmem(vm_offset_t dest, const size_t len)
52 static vm_offset_t last_dest = 0;
53 static size_t last_len = 0;
57 * Check to see if this region fits in a prior mapping.
58 * Allocations are generally sequential, so only check
61 if (dest >= last_dest &&
62 (dest + len) <= (last_dest + last_len)) {
67 * Trim area covered by existing mapping, if any
69 if (dest < (last_dest + last_len) && dest >= last_dest) {
70 nlen -= (last_dest + last_len) - dest;
71 dest = last_dest + last_len;
74 destp = (void *)(dest & ~PAGE_MASK);
75 resid = dest & PAGE_MASK;
78 * To avoid repeated mappings on small allocations,
79 * never map anything less than MAPMEM_PAGE_INC pages at a time
81 if ((nlen + resid) < PAGE_SIZE*MAPMEM_PAGE_INC) {
82 dlen = PAGE_SIZE*MAPMEM_PAGE_INC;
84 dlen = roundup(nlen + resid, PAGE_SIZE);
86 if (OF_call_method("claim", memory, 3, 1, destp, dlen, 0, &addr)
88 printf("ofw_mapmem: physical claim failed\n");
93 * We only do virtual memory management when real_mode is false.
96 if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr)
98 printf("ofw_mapmem: virtual claim failed\n");
102 if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0)
104 printf("ofw_mapmem: map failed\n");
108 last_dest = (vm_offset_t) destp;
115 ofw_copyin(const void *src, vm_offset_t dest, const size_t len)
117 if (ofw_mapmem(dest, len)) {
118 printf("ofw_copyin: map error\n");
122 bcopy(src, (void *)dest, len);
127 ofw_copyout(const vm_offset_t src, void *dest, const size_t len)
129 bcopy((void *)src, dest, len);
134 ofw_readin(readin_handle_t fd, vm_offset_t dest, const size_t len)
137 size_t resid, chunk, get;
143 chunk = min(READIN_BUF, len);
146 printf("ofw_readin: buf malloc failed\n");
150 if (ofw_mapmem(dest, len)) {
151 printf("ofw_readin: map error\n");
156 for (resid = len; resid > 0; resid -= got, p += got) {
157 get = min(chunk, resid);
158 got = VECTX_READ(fd, buf, get);
162 printf("ofw_readin: read failed\n");
166 bcopy(buf, (void *)p, got);