Subversion Repositories HelenOS

Rev

Rev 3029 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3029 Rev 3246
Line 46... Line 46...
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 userspace
51
 * and information about the share is provided as sysinfo values to the
52
 * 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;
Line 84... Line 84...
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), FRAME_SIZE);
89
    rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize),
-
 
90
        FRAME_SIZE);
90
    rd_parea.vbase = (uintptr_t) ((void *) header + hsize);
91
    rd_parea.vbase = (uintptr_t) ((void *) header + hsize);
91
    rd_parea.frames = SIZE2FRAMES(dsize);
92
    rd_parea.frames = SIZE2FRAMES(dsize);
92
    rd_parea.cacheable = true;
93
    rd_parea.cacheable = true;
93
    ddi_parea_register(&rd_parea);
94
    ddi_parea_register(&rd_parea);
94
 
95
 
95
    sysinfo_set_item_val("rd", NULL, true);
96
    sysinfo_set_item_val("rd", NULL, true);
96
    sysinfo_set_item_val("rd.header_size", NULL, hsize);   
97
    sysinfo_set_item_val("rd.header_size", NULL, hsize);   
97
    sysinfo_set_item_val("rd.size", NULL, dsize);
98
    sysinfo_set_item_val("rd.size", NULL, dsize);
98
    sysinfo_set_item_val("rd.address.physical", NULL, (unative_t)
99
    sysinfo_set_item_val("rd.address.physical", NULL,
99
        KA2PA((void *) header + hsize));
100
        (unative_t) KA2PA((void *) header + hsize));
100
 
101
 
101
    return RE_OK;
102
    return RE_OK;
102
}
103
}
103
 
104
 
104
/** @}
105
/** @}