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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
__FBSDID("$FreeBSD$");
/*
* MD primitives supporting placement of module data
*
* XXX should check load address/size against memory top.
*/
#include <stand.h>
#include "libofw.h"
#define READIN_BUF (4 * 1024)
#define PAGE_SIZE 0x1000
#define PAGE_MASK 0x0fff
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
static int
ofw_mapmem(vm_offset_t dest, const size_t len)
{
void *destp, *addr;
size_t dlen;
size_t resid;
size_t nlen;
static vm_offset_t last_dest = 0;
static size_t last_len = 0;
nlen = len;
/*
* Check to see if this region fits in a prior mapping.
* Allocations are generally sequential, so only check
* the last one.
*/
if (dest >= last_dest &&
(dest + len) <= (last_dest + last_len)) {
return (0);
}
/*
* Trim area covered by existing mapping, if any
*/
if (dest < (last_dest + last_len)) {
nlen -= (last_dest + last_len) - dest;
dest = last_dest + last_len;
}
destp = (void *)(dest & ~PAGE_MASK);
resid = dest & PAGE_MASK;
/*
* To avoid repeated mappings on small allocations,
* never map anything less than 16 pages at a time
*/
if ((nlen + resid) < PAGE_SIZE*8) {
dlen = PAGE_SIZE*8;
} else
dlen = roundup(nlen + resid, PAGE_SIZE);
if (OF_call_method("claim", memory, 3, 1, destp, dlen, 0, &addr)
== -1) {
printf("ofw_mapmem: physical claim failed\n");
return (ENOMEM);
}
if (OF_call_method("claim", mmu, 3, 1, destp, dlen, 0, &addr) == -1) {
printf("ofw_mapmem: virtual claim failed\n");
return (ENOMEM);
}
if (OF_call_method("map", mmu, 4, 0, destp, destp, dlen, 0) == -1) {
printf("ofw_mapmem: map failed\n");
return (ENOMEM);
}
last_dest = (vm_offset_t) destp;
last_len = dlen;
return (0);
}
ssize_t
ofw_copyin(const void *src, vm_offset_t dest, const size_t len)
{
if (ofw_mapmem(dest, len)) {
printf("ofw_copyin: map error\n");
return (0);
}
bcopy(src, (void *)dest, len);
return(len);
}
ssize_t
ofw_copyout(const vm_offset_t src, void *dest, const size_t len)
{
bcopy((void *)src, dest, len);
return(len);
}
ssize_t
ofw_readin(const int fd, vm_offset_t dest, const size_t len)
{
void *buf;
size_t resid, chunk, get;
ssize_t got;
vm_offset_t p;
p = dest;
chunk = min(READIN_BUF, len);
buf = malloc(chunk);
if (buf == NULL) {
printf("ofw_readin: buf malloc failed\n");
return(0);
}
if (ofw_mapmem(dest, len)) {
printf("ofw_readin: map error\n");
free(buf);
return (0);
}
for (resid = len; resid > 0; resid -= got, p += got) {
get = min(chunk, resid);
got = read(fd, buf, get);
if (got <= 0) {
if (got < 0)
printf("ofw_readin: read failed\n");
break;
}
bcopy(buf, (void *)p, got);
}
free(buf);
return(len - resid);
}
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