0,0 → 1,109 |
/* |
* Copyright (c) 2006 Martin Decky |
* 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. |
*/ |
|
/** @addtogroup genericmm |
* @{ |
*/ |
|
/** |
* @file |
* @brief RAM disk support. |
* |
* Support for RAM disk images. |
*/ |
|
#include <lib/rd.h> |
#include <arch/byteorder.h> |
#include <mm/frame.h> |
#include <sysinfo/sysinfo.h> |
#include <ddi/ddi.h> |
#include <print.h> |
#include <align.h> |
|
static parea_t rd_parea; /**< Physical memory area for rd. */ |
|
/** |
* RAM disk initialization routine. At this point, the RAM disk memory is shared |
* and information about the share is provided as sysinfo values to the userspace |
* tasks. |
*/ |
int init_rd(rd_header * header, size_t size) |
{ |
/* Identify RAM disk */ |
if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || |
(header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3)) |
return RE_INVALID; |
|
/* Identify version */ |
if (header->version != RD_VERSION) |
return RE_UNSUPPORTED; |
|
uint32_t hsize; |
uint64_t dsize; |
switch (header->data_type) { |
case RD_DATA_LSB: |
hsize = uint32_t_le2host(header->header_size); |
dsize = uint64_t_le2host(header->data_size); |
break; |
case RD_DATA_MSB: |
hsize = uint32_t_be2host(header->header_size); |
dsize = uint64_t_be2host(header->data_size); |
break; |
default: |
return RE_UNSUPPORTED; |
} |
|
if ((hsize % FRAME_SIZE) || (dsize % FRAME_SIZE)) |
return RE_UNSUPPORTED; |
|
if (dsize % FRAME_SIZE) |
return RE_UNSUPPORTED; |
|
if (hsize > size) |
return RE_INVALID; |
|
if ((uint64_t) hsize + dsize > size) |
dsize = size - hsize; |
|
rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize), FRAME_SIZE); |
rd_parea.vbase = (uintptr_t) ((void *) header + hsize); |
rd_parea.frames = SIZE2FRAMES(dsize); |
rd_parea.cacheable = true; |
ddi_parea_register(&rd_parea); |
|
sysinfo_set_item_val("rd", NULL, true); |
sysinfo_set_item_val("rd.header_size", NULL, hsize); |
sysinfo_set_item_val("rd.size", NULL, dsize); |
sysinfo_set_item_val("rd.address.physical", NULL, (unative_t) |
KA2PA((void *) header + hsize)); |
|
return RE_OK; |
} |
|
/** @} |
*/ |