WebSVN – HelenOS – Diff – /trunk/kernel/generic/src/lib/rd.c


/*
 * 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 <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_t *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 (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.frames = SIZE2FRAMES(dsize);
 
    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;
}
 
/** @}
 */
 

Rev 3246	Rev 3908
1	/*	1	/*
2	* Copyright (c) 2006 Martin Decky	2	* Copyright (c) 2006 Martin Decky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genericmm	29	/** @addtogroup genericmm
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief RAM disk support.	35	* @brief RAM disk support.
36	*	36	*
37	* Support for RAM disk images.	37	* Support for RAM disk images.
38	*/	38	*/
39		39
40	#include <lib/rd.h>	40	#include <lib/rd.h>
41	#include <byteorder.h>	41	#include <byteorder.h>
42	#include <mm/frame.h>	42	#include <mm/frame.h>
43	#include <sysinfo/sysinfo.h>	43	#include <sysinfo/sysinfo.h>
44	#include <ddi/ddi.h>	44	#include <ddi/ddi.h>
45	#include <align.h>	45	#include <align.h>
46		46
47	static parea_t rd_parea; /*< Physical memory area for rd. /	47	static parea_t rd_parea; /*< Physical memory area for rd. /
48		48
49	/**	49	/**
50	* RAM disk initialization routine. At this point, the RAM disk memory is shared	50	* RAM disk initialization routine. At this point, the RAM disk memory is shared
51	* and information about the share is provided as sysinfo values to the	51	* and information about the share is provided as sysinfo values to the
52	* userspace tasks.	52	* userspace tasks.
53	*/	53	*/
54	int init_rd(rd_header_t *header, size_t size)	54	int init_rd(rd_header_t *header, size_t size)
55	{	55	{
56	/* Identify RAM disk */	56	/* Identify RAM disk */
57	if ((header->magic[0] != RD_MAG0) \|\| (header->magic[1] != RD_MAG1) \|\|	57	if ((header->magic[0] != RD_MAG0) \|\| (header->magic[1] != RD_MAG1) \|\|
58	(header->magic[2] != RD_MAG2) \|\| (header->magic[3] != RD_MAG3))	58	(header->magic[2] != RD_MAG2) \|\| (header->magic[3] != RD_MAG3))
59	return RE_INVALID;	59	return RE_INVALID;
60		60
61	/* Identify version */	61	/* Identify version */
62	if (header->version != RD_VERSION)	62	if (header->version != RD_VERSION)
63	return RE_UNSUPPORTED;	63	return RE_UNSUPPORTED;
64		64
65	uint32_t hsize;	65	uint32_t hsize;
66	uint64_t dsize;	66	uint64_t dsize;
67	switch (header->data_type) {	67	switch (header->data_type) {
68	case RD_DATA_LSB:	68	case RD_DATA_LSB:
69	hsize = uint32_t_le2host(header->header_size);	69	hsize = uint32_t_le2host(header->header_size);
70	dsize = uint64_t_le2host(header->data_size);	70	dsize = uint64_t_le2host(header->data_size);
71	break;	71	break;
72	case RD_DATA_MSB:	72	case RD_DATA_MSB:
73	hsize = uint32_t_be2host(header->header_size);	73	hsize = uint32_t_be2host(header->header_size);
74	dsize = uint64_t_be2host(header->data_size);	74	dsize = uint64_t_be2host(header->data_size);
75	break;	75	break;
76	default:	76	default:
77	return RE_UNSUPPORTED;	77	return RE_UNSUPPORTED;
78	}	78	}
79		79
80	if ((hsize % FRAME_SIZE) \|\| (dsize % FRAME_SIZE))	80	if ((hsize % FRAME_SIZE) \|\| (dsize % FRAME_SIZE))
81	return RE_UNSUPPORTED;	81	return RE_UNSUPPORTED;
82		82
83	if (hsize > size)	83	if (hsize > size)
84	return RE_INVALID;	84	return RE_INVALID;
85		85
86	if ((uint64_t) hsize + dsize > size)	86	if ((uint64_t) hsize + dsize > size)
87	dsize = size - hsize;	87	dsize = size - hsize;
88		88
89	rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize),	89	rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize),
90	FRAME_SIZE);	90	FRAME_SIZE);
91	rd_parea.vbase = (uintptr_t) ((void *) header + hsize);	-
92	rd_parea.frames = SIZE2FRAMES(dsize);	91	rd_parea.frames = SIZE2FRAMES(dsize);
93	rd_parea.cacheable = true;	-
94	ddi_parea_register(&rd_parea);	92	ddi_parea_register(&rd_parea);
95		93
96	sysinfo_set_item_val("rd", NULL, true);	94	sysinfo_set_item_val("rd", NULL, true);
97	sysinfo_set_item_val("rd.header_size", NULL, hsize);	95	sysinfo_set_item_val("rd.header_size", NULL, hsize);
98	sysinfo_set_item_val("rd.size", NULL, dsize);	96	sysinfo_set_item_val("rd.size", NULL, dsize);
99	sysinfo_set_item_val("rd.address.physical", NULL,	97	sysinfo_set_item_val("rd.address.physical", NULL,
100	(unative_t) KA2PA((void *) header + hsize));	98	(unative_t) KA2PA((void *) header + hsize));
101		99
102	return RE_OK;	100	return RE_OK;
103	}	101	}
104		102
105	/** @}	103	/** @}
106	*/	104	*/
107		105

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(root)/trunk/kernel/generic/src/lib/rd.c @ 2071 – Rev 3246 → 3908