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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <fcode/private.h>
#include <fcode/log.h>
#include <fcdriver/fcdriver.h>
#define MAX_MAPS 256
#define MAP_IS_VALID 0x01
struct map_table {
int map_flags;
uint64_t map_add;
size_t map_size;
uint64_t adj_virt;
size_t adj_length;
} map_table[MAX_MAPS];
/*
* Originally, this code translated kernel supplied virtual addresses into
* "memory cookies", which was a 32-bit number with ascii-M in the upper 8
* bits, a 4-bit index and a 20-bit offset. However, this caused two
* problems: 1) the 20-bit offset was too small for some devices, esp. some
* with frame-buffers; 2) if the fcode used the cookie to program the
* hardware, there was no easy way for the software to detect that a
* translation needed to be done.
*
* For that reason, "memory cookies" are now just the kernel-supplied
* virtual address, and we now check each memory access to see if it's
* attempting to access kernel-supplied memory. The only important thing
* now is that "is_mcookie" returns 1 (or true) if the tested mcookie
* is a kernel virtual address.
*
* There is a potential bug if the kernel virtual address happens to
* conflict with a user virtual address. However, the current implementation
* of Solaris avoids this conflict.
*/
fstack_t
mapping_to_mcookie(uint64_t req_add, size_t req_size, uint64_t adj_virt,
size_t adj_length)
{
int i;
struct map_table *mp;
for (i = 0, mp = map_table; i < MAX_MAPS; i++, mp++)
if ((mp->map_flags & MAP_IS_VALID) == 0)
break;
if (i == MAX_MAPS) {
log_message(MSG_WARN, "Warning: too many mappings\n");
return (0);
}
debug_msg(DEBUG_REG_ACCESS, "Allocating mapping: %d add: 0x%llx"
" size: 0x%x\n", i, req_add, req_size);
mp->map_flags |= MAP_IS_VALID;
mp->map_add = req_add;
mp->map_size = req_size;
mp->adj_virt = adj_virt;
mp->adj_length = adj_length;
if (mp->adj_length != 0)
return (adj_virt);
else
return (req_add);
}
void
delete_mapping(fstack_t mcookie)
{
int i;
struct map_table *mp;
for (i = 0, mp = map_table; i < MAX_MAPS; i++, mp++) {
if ((mp->map_flags & MAP_IS_VALID) &&
mcookie >= mp->map_add &&
mcookie < mp->map_add + mp->map_size) {
debug_msg(DEBUG_REG_ACCESS, "Deallocating mapping: %d"
" add: 0x%llx size: 0x%x\n", i, mp->map_add,
mp->map_size);
mp->map_flags &= ~MAP_IS_VALID;
mp->map_add = 0;
mp->map_size = 0;
mp->adj_virt = 0;
mp->adj_length = 0;
return;
}
}
log_message(MSG_WARN, "Warning: delete_mapping: invalid"
" mcookie: %llx\n", (uint64_t)mcookie);
}
int
is_mcookie(fstack_t mcookie)
{
struct map_table *mp;
int i;
for (i = 0, mp = map_table; i < MAX_MAPS; i++, mp++)
if ((mp->map_flags & MAP_IS_VALID) &&
mcookie >= mp->map_add &&
mcookie < mp->map_add + mp->map_size)
return (1);
return (0);
}
uint64_t
mcookie_to_addr(fstack_t mcookie)
{
return (mcookie);
}
fstack_t
mcookie_to_rlen(fstack_t mcookie)
{
int i;
struct map_table *mp;
for (i = 0, mp = map_table; i < MAX_MAPS; i++, mp++) {
if ((mp->map_flags & MAP_IS_VALID) &&
mcookie >= mp->map_add &&
mcookie < mp->map_add + mp->map_size) {
return (mp->map_size);
}
}
log_message(MSG_WARN, "Warning: mcookie_to_rlen: invalid"
" mcookie: %llx\n", (uint64_t)mcookie);
return (0);
}
fstack_t
mcookie_to_rvirt(fstack_t mcookie)
{
int i;
struct map_table *mp;
for (i = 0, mp = map_table; i < MAX_MAPS; i++, mp++) {
if ((mp->map_flags & MAP_IS_VALID) &&
mcookie >= mp->map_add &&
mcookie < mp->map_add + mp->map_size) {
return (mp->map_add);
}
}
log_message(MSG_WARN, "Warning: mcookie_to_rvirt: invalid"
" mcookie: %llx\n", (uint64_t)mcookie);
return (0);
}
static void
dot_maps(fcode_env_t *env)
{
int i;
log_message(MSG_DEBUG, "idx base-addr size\n");
for (i = 0; i < MAX_MAPS; i++) {
if (map_table[i].map_flags & MAP_IS_VALID)
log_message(MSG_DEBUG, "%3d %016llx %8x\n", i,
map_table[i].map_add, map_table[i].map_size);
}
}
static void
map_qmark(fcode_env_t *env)
{
fstack_t d = POP(DS);
if (!is_mcookie(d))
log_message(MSG_INFO, "%llx: not mcookie\n", (uint64_t)d);
else
log_message(MSG_INFO, "%llx -> %llx\n", (uint64_t)d,
mcookie_to_addr(d));
}
static void
add_map(fcode_env_t *env)
{
fstack_t size, addr;
size = POP(DS);
addr = POP(DS);
addr = mapping_to_mcookie(addr, size, 0, 0);
PUSH(DS, addr);
}
static void
del_map(fcode_env_t *env)
{
fstack_t addr;
addr = POP(DS);
delete_mapping(addr);
}
#pragma init(_init)
static void
_init(void)
{
fcode_env_t *env = initial_env;
ASSERT(env);
NOTICE;
FORTH(0, ".maps", dot_maps);
FORTH(0, "map?", map_qmark);
FORTH(0, "add-map", add_map);
FORTH(0, "del-map", del_map);
}
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