* BeOS Driver for Intel ICH AC'97 Link interface
*
* Copyright (c) 2002, Marcus Overhagen <marcus@overhagen.de>
*
* All rights reserved.
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 <Errors.h>
#include <OS.h>
#include <string.h>
#include "debug.h"
#include "util.h"
spinlock slock = 0;
uint32 round_to_pagesize(uint32 size);
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);
}
uint32
round_to_pagesize(uint32 size)
{
return (size + B_PAGE_SIZE - 1) & ~(B_PAGE_SIZE - 1);
}
area_id
alloc_mem(phys_addr_t *phy, void **log, size_t size, const char *name)
{
physical_entry pe;
void * logadr;
area_id area;
status_t rv;
LOG(("allocating %d bytes for %s\n",size,name));
size = round_to_pagesize(size);
area = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
B_32_BIT_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
if (area < B_OK) {
PRINT(("couldn't allocate area %s\n",name));
return B_ERROR;
}
rv = get_memory_map(logadr, size, &pe, 1);
if (rv < B_OK) {
delete_area(area);
PRINT(("couldn't map %s\n", name));
return B_ERROR;
}
memset(logadr, 0, size);
if (log)
*log = logadr;
if (phy)
*phy = pe.address;
LOG(("area = %d, size = %d, log = %#08X, phy = %#08X\n", area, size, logadr,
pe.address));
return area;
}
area_id
map_mem(void **log, phys_addr_t phy, size_t size, const char *name)
{
uint32 offset;
phys_addr_t phyadr;
void *mapadr;
area_id area;
LOG(("mapping physical address %p with %#x bytes for %s\n",phy,size,name));
offset = phy & (B_PAGE_SIZE - 1);
phyadr = phy - offset;
size = round_to_pagesize(size + offset);
area = map_physical_memory(name, phyadr, size, B_ANY_KERNEL_ADDRESS,
0, &mapadr);
*log = (void*) ((uint32)mapadr + offset);
LOG(("physical = %p, logical = %p, offset = %#x, phyadr = %p, mapadr = %p, size = %#x, area = %#x\n",
phy, *log, offset, phyadr, mapadr, size, area));
return area;
}
