* Copyright 2004-2015 Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*
* Authors:
* Jérôme Duval, jerome.duval@free.fr
* Marcus Overhagen, marcus@overhagen.de
* Jérôme Lévêque, leveque.jerome@gmail.com
*/
#include <Errors.h>
#include <OS.h>
#include <string.h>
#include <vm/vm.h>
#include <vm/VMAddressSpace.h>
#include "debug.h"
#include "util.h"
static spinlock slock = B_SPINLOCK_INITIALIZER;
cpu_status
lock(void)
{
cpu_status status = disable_interrupts();
acquire_spinlock(&slock);
return status;
}
void
unlock(cpu_status status)
{
release_spinlock(&slock);
restore_interrupts(status);
}
area_id
alloc_mem(physical_entry *phy, addr_t *log, size_t size, const char *name)
{
void * logadr;
area_id areaid;
status_t rv;
virtual_address_restrictions virtualRestrictions = {};
virtualRestrictions.address_specification = B_ANY_KERNEL_ADDRESS;
physical_address_restrictions physicalRestrictions = {};
physicalRestrictions.high_address = 1 << 28;
ITRACE("Allocating %s: ", name);
areaid = vm_create_anonymous_area(B_SYSTEM_TEAM, name, size, B_CONTIGUOUS,
B_READ_AREA | B_WRITE_AREA, 0, 0,
&virtualRestrictions, &physicalRestrictions, true, &logadr);
if (areaid < B_OK) {
ITRACE("couldn't allocate\n");
return B_ERROR;
}
rv = get_memory_map(logadr, size, phy, 1);
if (rv < B_OK) {
delete_area(areaid);
ITRACE("couldn't map\n");
return B_ERROR;
}
if (log)
*log = (addr_t)logadr;
ITRACE("area = %" B_PRId32 ", size = %" B_PRIuSIZE ", log = 0x%" \
B_PRIXADDR ", phy = 0x%" B_PRIXPHYSADDR "\n", areaid, size,
*log, phy->address);
return areaid;
}
