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662 decky 1
/*
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 * Copyright (C) 2005 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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678 decky 29
#include <syscall/syscall.h>
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#include <proc/thread.h>
977 jermar 31
#include <mm/as.h>
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#include <print.h>
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#include <putchar.h>
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#include <ipc/ipc.h>
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#include <errno.h>
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#include <proc/task.h>
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#include <arch.h>
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#include <debug.h>
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static __native sys_ctl(void) {
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	printf("Thread finished\n");
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	thread_exit();
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	/* Unreachable */
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	return 0;
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}
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static __native sys_io(int fd, const void * buf, size_t count) {
712 decky 48
 
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	// TODO: buf sanity checks and a lot of other stuff ...
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	size_t i;
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	for (i = 0; i < count; i++)
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		putchar(((char *) buf)[i]);
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	return count;
662 decky 57
}
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/** Send a call over IPC, wait for reply, return to user
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 *
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 * @return Call identification, returns -1 on fatal error, 
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           -2 on 'Too many async request, handle answers first
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 */
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static __native sys_ipc_call_sync(__native phoneid, __native method, 
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				   __native arg1, __native *data)
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{
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	call_t call;
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	phone_t *phone;
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	/* Special answerbox for synchronous messages */
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	if (phoneid >= IPC_MAX_PHONES)
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		return IPC_CALLRET_FATAL;
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	phone = &TASK->phones[phoneid];
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	if (!phone->callee)
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		return IPC_CALLRET_FATAL;
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965 palkovsky 78
	ipc_call_init(&call);
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	IPC_SET_METHOD(call.data, method);
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	IPC_SET_ARG1(call.data, arg1);
959 palkovsky 81
 
965 palkovsky 82
	ipc_call_sync(phone, &call);
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965 palkovsky 84
	copy_to_uspace(data, &call.data, sizeof(call.data));
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	return 0;
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}
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965 palkovsky 89
static __native sys_ipc_call_sync_medium(__native phoneid, __native *data)
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{
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	call_t call;
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	phone_t *phone;
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	/* Special answerbox for synchronous messages */
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	if (phoneid >= IPC_MAX_PHONES)
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		return IPC_CALLRET_FATAL;
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	phone = &TASK->phones[phoneid];
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	if (!phone->callee)
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		return IPC_CALLRET_FATAL;
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	ipc_call_init(&call);
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	copy_from_uspace(&call.data, data, sizeof(call.data));
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	ipc_call_sync(phone, &call);
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	copy_to_uspace(data, &call.data, sizeof(call.data));
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	return 0;
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}
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/** Send an asynchronous call over ipc
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 *
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 * @return Call identification, returns -1 on fatal error, 
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           -2 on 'Too many async request, handle answers first
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 */
965 palkovsky 118
static __native sys_ipc_call_async(__native phoneid, __native method, 
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				   __native arg1, __native arg2)
959 palkovsky 120
{
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	call_t *call;
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	phone_t *phone;
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	if (phoneid >= IPC_MAX_PHONES)
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		return IPC_CALLRET_FATAL;
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	phone = &TASK->phones[phoneid];
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	if (!phone->callee)
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		return IPC_CALLRET_FATAL;
959 palkovsky 130
 
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	/* TODO: Check that we did not exceed system imposed maximum
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	 * of asynchrnously sent messages
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	 * - the userspace should be able to handle it correctly
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	 */
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	call = ipc_call_alloc();
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	IPC_SET_METHOD(call->data, method);
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	IPC_SET_ARG1(call->data, arg1);
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	IPC_SET_ARG2(call->data, arg2);
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	ipc_call(phone, call);
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	return (__native) call;
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}
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/** Send IPC answer */
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static __native sys_ipc_answer(__native callid, __native retval, __native arg1,
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			       __native arg2)
955 palkovsky 148
{
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	call_t *call;
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	/* Check that the user is not sending us answer callid */
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	ASSERT(! (callid & 1));
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	/* TODO: Check that the callid is in the dispatch table */
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	call = (call_t *) callid;
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965 palkovsky 156
	IPC_SET_RETVAL(call->data, retval);
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	IPC_SET_ARG1(call->data, arg1);
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	IPC_SET_ARG2(call->data, arg2);
955 palkovsky 159
 
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	ipc_answer(&TASK->answerbox, call);
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	return 0;
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}
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/** Wait for incoming ipc call or answer
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 *
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 * @param result 
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 * @param flags
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 * @return Callid, if callid & 1, then the call is answer
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 */
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static __native sys_ipc_wait_for_call(__native *calldata, __native flags)
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{
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	call_t *call;
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174
	call = ipc_wait_for_call(&TASK->answerbox, flags);
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965 palkovsky 176
	copy_to_uspace(calldata, &call->data, sizeof(call->data));
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	if (call->flags & IPC_CALL_ANSWERED) {
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		ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
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		ipc_call_free(call);
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		return ((__native)call) | IPC_CALLID_ANSWERED;
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	}
955 palkovsky 182
	return (__native)call;
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}
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977 jermar 185
static __native sys_mremap(void *address, size_t size, unsigned long flags)
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{
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	return as_remap(AS, (__address) address, size, 0);
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}
955 palkovsky 189
 
662 decky 190
syshandler_t syscall_table[SYSCALL_END] = {
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	sys_ctl,
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	sys_io,
977 jermar 193
	sys_mremap,
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	sys_ipc_call_sync,
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	sys_ipc_call_sync_medium,
959 palkovsky 196
	sys_ipc_call_async,
955 palkovsky 197
	sys_ipc_answer,
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	sys_ipc_wait_for_call
662 decky 199
};