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  1. /*
  2.  * Copyright (c) 2006 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup rd
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file    rd.c
  35.  * @brief   Initial RAM disk for HelenOS.
  36.  */
  37.  
  38. #include <ipc/ipc.h>
  39. #include <ipc/services.h>
  40. #include <ipc/ns.h>
  41. #include <sysinfo.h>
  42. #include <as.h>
  43. #include <ddi.h>
  44. #include <align.h>
  45. #include <bool.h>
  46. #include <errno.h>
  47. #include <async.h>
  48. #include <stdlib.h>
  49. #include <unistd.h>
  50. #include <align.h>
  51. #include <async.h>
  52. #include <ddi.h>
  53. #include <sysinfo.h>
  54. #include <libarch/ddi.h>
  55.  
  56. #include "rd.h"
  57.  
  58. #define EOK 0
  59.  
  60. static void * rd_addr;
  61.  
  62. static void rd_connection(ipc_callid_t iid, ipc_call_t *icall)
  63. {
  64.     ipc_callid_t callid;
  65.     ipc_call_t call;
  66.     int retval;
  67.  
  68.     ipc_answer_fast(iid, 0, 0, 0);
  69.     int block_size = 512;
  70.     ipcarg_t dst, offset;
  71.  
  72.     while (1) {
  73.         callid = async_get_call(&call);
  74.         switch (IPC_GET_METHOD(call)) {
  75.         case IPC_M_PHONE_HUNGUP:
  76.             ipc_answer_fast(callid, 0,0,0);
  77.             return;
  78.         case BD_READ_BLOCK:
  79.             //returnt the block data           
  80.             dst = IPC_GET_ARG1(call);
  81.             offset = IPC_GET_ARG2(call);
  82.             //copy_from_uspace(dst, rd_addr+offset,block_size);
  83.             memcpy((void *) dst, rd_addr+offset, block_size);
  84.             retval = EOK;
  85.             break;
  86.         default:
  87.             retval = EINVAL;
  88.         }
  89.         ipc_answer_fast(callid, retval, 0, 0);
  90.     }  
  91. }
  92.  
  93.  
  94. static bool rd_init(void)
  95. {
  96.     size_t rd_size = sysinfo_value("rd.size");
  97.     void * rd_ph_addr = (void *) sysinfo_value("rd.address.physical");
  98.     int rd_color = (int) sysinfo_value("rd.address.color");
  99.    
  100.     if (rd_size == 0)
  101.         return false;
  102.    
  103.     rd_addr = as_get_mappable_page(rd_size, rd_color);
  104.    
  105.     physmem_map(rd_ph_addr, rd_addr, ALIGN_UP(rd_size, PAGE_SIZE) >> PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE);
  106.    
  107.     return true;
  108. }
  109.  
  110.  
  111. int main(int argc, char **argv)
  112. {
  113.     if (rd_init()) {
  114.         ipcarg_t phonead;
  115.        
  116.         async_set_client_connection(rd_connection);
  117.        
  118.         /* Register service at nameserver */
  119.         if (ipc_connect_to_me(PHONE_NS, SERVICE_RD, 0, &phonead) != 0)
  120.             return -1;
  121.        
  122.         async_manager();
  123.        
  124.         /* Never reached */
  125.         return 0;
  126.     }
  127.    
  128.     return -1;
  129. }
  130.  
  131. /**
  132.  * @}
  133.  */
  134.