0,0 → 1,134 |
/* |
* Copyright (c) 2007 Michal Konopa |
* Copyright (c) 2007 Martin Jelen |
* Copyright (c) 2007 Peter Majer |
* 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 rd |
* @{ |
*/ |
|
/** |
* @file rd.c |
* @brief Initial RAM disk for HelenOS. |
*/ |
|
#include <ipc/ipc.h> |
#include <ipc/services.h> |
#include <ipc/ns.h> |
#include <sysinfo.h> |
#include <as.h> |
#include <ddi.h> |
#include <align.h> |
#include <bool.h> |
#include <errno.h> |
#include <async.h> |
#include <align.h> |
#include <async.h> |
#include "rd.h" |
|
static void *rd_addr; |
static void *fs_addr; |
|
static void rd_connection(ipc_callid_t iid, ipc_call_t *icall) |
{ |
ipc_callid_t callid; |
ipc_call_t call; |
int retval; |
|
ipc_answer_fast(iid, 0, 0, 0); |
ipcarg_t offset; |
|
while (1) { |
callid = async_get_call(&call); |
switch (IPC_GET_METHOD(call)) { |
case IPC_M_PHONE_HUNGUP: |
ipc_answer_fast(callid, 0,0,0); |
return; |
case IPC_M_AS_AREA_SEND: |
ipc_answer_fast(callid, 0, (uintptr_t)fs_addr, 0); |
continue; |
case RD_READ_BLOCK: |
offset = IPC_GET_ARG1(call); |
memcpy((void *)fs_addr, rd_addr+offset, BLOCK_SIZE); |
retval = EOK; |
break; |
default: |
retval = EINVAL; |
} |
ipc_answer_fast(callid, retval, 0, 0); |
} |
} |
|
|
static bool rd_init(void) |
{ |
int retval, flags; |
|
size_t rd_size = sysinfo_value("rd.size"); |
void * rd_ph_addr = (void *) sysinfo_value("rd.address.physical"); |
|
if (rd_size == 0) |
return false; |
|
rd_addr = as_get_mappable_page(rd_size); |
|
flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
retval = physmem_map(rd_ph_addr, rd_addr, ALIGN_UP(rd_size, PAGE_SIZE) >> PAGE_WIDTH, flags); |
|
if (retval < 0) |
return false; |
|
size_t fs_size = ALIGN_UP(BLOCK_SIZE * sizeof(char), PAGE_SIZE); |
fs_addr = as_get_mappable_page(fs_size); |
|
return true; |
} |
|
int main(int argc, char **argv) |
{ |
if (rd_init()) { |
ipcarg_t phonead; |
|
async_set_client_connection(rd_connection); |
|
/* Register service at nameserver */ |
if (ipc_connect_to_me(PHONE_NS, SERVICE_RD, 0, &phonead) != 0) |
return -1; |
|
async_manager(); |
|
/* Never reached */ |
return 0; |
} |
|
return -1; |
} |
|
/** |
* @} |
*/ |