| 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 <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; |
| } |
| |
| /** @} |
| */ |