/kernel/trunk/generic/include/mm/page.h |
---|
67,7 → 67,7 |
memcpy(dst, src, cnt); |
} |
static inline void copy_to_kernel(void *dst, void *src, count_t cnt) |
static inline void copy_from_uspace(void *dst, void *src, count_t cnt) |
{ |
memcpy(dst, src, cnt); |
} |
/kernel/trunk/generic/include/syscall/syscall.h |
---|
33,6 → 33,7 |
SYS_CTL = 0, |
SYS_IO, |
SYS_IPC_CALL_SYNC, |
SYS_IPC_CALL_SYNC_MEDIUM, |
SYS_IPC_CALL_ASYNC, |
SYS_IPC_ANSWER, |
SYS_IPC_WAIT, |
/kernel/trunk/generic/include/ipc/ipc.h |
---|
29,17 → 29,46 |
#ifndef __IPC_H__ |
#define __IPC_H__ |
#define IPC_CALL_LEN 2 |
/* Length of data being transfered with IPC call */ |
/* - the uspace may not be able to utilize full length */ |
#define IPC_CALL_LEN 4 |
/* Flags for calls */ |
#define IPC_CALL_ANSWERED 1 |
#define IPC_CALL_ANSWERED 1 /**< This is answer to a call */ |
#define IPC_CALL_STATIC_ALLOC 2 /**< This call will not be freed on error */ |
/* Flags for ipc_wait_for_call */ |
#define IPC_WAIT_NONBLOCKING 1 |
/* Flags of callid */ |
#define IPC_CALLID_ANSWERED 1 |
/* Return values from IPC_ASYNC */ |
#define IPC_CALLRET_FATAL -1 |
#define IPC_CALLRET_TEMPORARY -2 |
/* Macros for manipulating calling data */ |
#define IPC_SET_RETVAL(data, retval) ((data)[0] = (retval)) |
#define IPC_SET_METHOD(data, val) ((data)[0] = (val)) |
#define IPC_SET_ARG1(data, val) ((data)[1] = (val)) |
#define IPC_SET_ARG2(data, val) ((data)[2] = (val)) |
#define IPC_SET_ARG3(data, val) ((data)[3] = (val)) |
#define IPC_GET_METHOD(data) ((data)[0]) |
#define IPC_GET_RETVAL(data) ((data)[0]) |
#define IPC_GET_ARG1(data) ((data)[1]) |
#define IPC_GET_ARG2(data) ((data)[2]) |
#define IPC_GET_ARG3(data) ((data)[3]) |
/* Well known phone descriptors */ |
#define PHONE_NS 0 |
#ifdef KERNEL |
#include <synch/waitq.h> |
#include <synch/spinlock.h> |
#include <synch/mutex.h> |
#include <synch/condvar.h> |
#include <adt/list.h> |
#define IPC_MAX_PHONES 16 |
57,7 → 86,8 |
struct answerbox { |
SPINLOCK_DECLARE(lock); |
waitq_t wq; |
mutex_t mutex; |
condvar_t cv; |
link_t connected_phones; /**< Phones connected to this answerbox */ |
link_t calls; /**< Received calls */ |
72,7 → 102,6 |
answerbox_t *callee; |
} phone_t; |
extern void ipc_create_phonecompany(void); |
extern void ipc_init(void); |
extern call_t * ipc_wait_for_call(answerbox_t *box, int flags); |
extern void ipc_answer(answerbox_t *box, call_t *request); |
82,10 → 111,11 |
extern void ipc_phone_init(phone_t *phone, answerbox_t *box); |
extern void ipc_call_free(call_t *call); |
extern call_t * ipc_call_alloc(void); |
void ipc_answerbox_init(answerbox_t *box); |
void ipc_phone_init(phone_t *phone, answerbox_t *box); |
extern void ipc_answerbox_init(answerbox_t *box); |
extern void ipc_phone_init(phone_t *phone, answerbox_t *box); |
extern void ipc_call_init(call_t *call); |
extern answerbox_t *ipc_central_box; |
extern answerbox_t *ipc_phone_0; |
#endif |
/kernel/trunk/generic/include/ipc/ns.h |
---|
0,0 → 1,46 |
/* |
* Copyright (C) 2006 Ondrej Palkovsky |
* 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. |
*/ |
#ifndef __NS_H_ |
#define __NS_H_ |
/* NameService methods */ |
/** Ping name service */ |
#define NS_PING 1 |
#ifdef KERNEL |
#include <ipc/ipc.h> |
extern void ns_start(void); |
#endif |
#endif |
/kernel/trunk/generic/src/proc/task.c |
---|
36,6 → 36,7 |
#include <panic.h> |
#include <adt/list.h> |
#include <ipc/ipc.h> |
#include <ipc/ns.h> |
#include <memstr.h> |
SPINLOCK_INITIALIZE(tasks_lock); |
75,8 → 76,8 |
ipc_answerbox_init(&ta->answerbox); |
memsetb((__address)&ta->phones, sizeof(ta->phones[0])*IPC_MAX_PHONES, 0); |
if (ipc_central_box) |
ipc_phone_init(&ta->phones[0], ipc_central_box); |
if (ipc_phone_0) |
ipc_phone_init(&ta->phones[0], ipc_phone_0); |
ipl = interrupts_disable(); |
spinlock_lock(&tasks_lock); |
/kernel/trunk/generic/src/main/kinit.c |
---|
47,6 → 47,7 |
#include <interrupt.h> |
#include <console/kconsole.h> |
#include <elf.h> |
#include <ipc/ns.h> |
#ifdef CONFIG_SMP |
#include <arch/smp/mps.h> |
138,7 → 139,8 |
interrupts_enable(); |
ipc_create_phonecompany(); |
/* Initialize name service */ |
ns_start(); |
if (config.init_size > 0) { |
/* |
/kernel/trunk/generic/src/syscall/syscall.c |
---|
60,57 → 60,82 |
* @return Call identification, returns -1 on fatal error, |
-2 on 'Too many async request, handle answers first |
*/ |
static __native sys_ipc_call_sync(__native phoneid, __native arg1, |
__native arg2, __native *respdata) |
static __native sys_ipc_call_sync(__native phoneid, __native method, |
__native arg1, __native *data) |
{ |
call_t *call; |
call_t call; |
phone_t *phone; |
/* Special answerbox for synchronous messages */ |
if (phoneid >= IPC_MAX_PHONES) |
return -ENOENT; |
return IPC_CALLRET_FATAL; |
phone = &TASK->phones[phoneid]; |
if (!phone->callee) |
return -ENOENT; |
return IPC_CALLRET_FATAL; |
call = ipc_call_alloc(); |
call->data[0] = arg1; |
call->data[1] = arg2; |
ipc_call_init(&call); |
IPC_SET_METHOD(call.data, method); |
IPC_SET_ARG1(call.data, arg1); |
ipc_call_sync(phone, call); |
ipc_call_sync(phone, &call); |
copy_to_uspace(respdata, &call->data, sizeof(__native) * IPC_CALL_LEN); |
copy_to_uspace(data, &call.data, sizeof(call.data)); |
return 0; |
} |
static __native sys_ipc_call_sync_medium(__native phoneid, __native *data) |
{ |
call_t call; |
phone_t *phone; |
/* Special answerbox for synchronous messages */ |
if (phoneid >= IPC_MAX_PHONES) |
return IPC_CALLRET_FATAL; |
phone = &TASK->phones[phoneid]; |
if (!phone->callee) |
return IPC_CALLRET_FATAL; |
ipc_call_init(&call); |
copy_from_uspace(&call.data, data, sizeof(call.data)); |
ipc_call_sync(phone, &call); |
copy_to_uspace(data, &call.data, sizeof(call.data)); |
return 0; |
} |
/** Send an asynchronous call over ipc |
* |
* @return Call identification, returns -1 on fatal error, |
-2 on 'Too many async request, handle answers first |
*/ |
static __native sys_ipc_call_async(__native phoneid, __native arg1, |
__native arg2) |
static __native sys_ipc_call_async(__native phoneid, __native method, |
__native arg1, __native arg2) |
{ |
call_t *call; |
phone_t *phone; |
if (phoneid >= IPC_MAX_PHONES) |
return -ENOENT; |
return IPC_CALLRET_FATAL; |
phone = &TASK->phones[phoneid]; |
if (!phone->callee) |
return -ENOENT; |
return IPC_CALLRET_FATAL; |
/* TODO: Check that we did not exceed system imposed maximum |
* of asynchrnously sent messages |
* - the userspace should be able to handle it correctly |
*/ |
call = ipc_call_alloc(); |
call->data[0] = arg1; |
call->data[1] = arg2; |
IPC_SET_METHOD(call->data, method); |
IPC_SET_ARG1(call->data, arg1); |
IPC_SET_ARG2(call->data, arg2); |
ipc_call(phone, call); |
return (__native) call; |
117,7 → 142,8 |
} |
/** Send IPC answer */ |
static __native sys_ipc_answer(__native callid, __native arg1, __native arg2) |
static __native sys_ipc_answer(__native callid, __native retval, __native arg1, |
__native arg2) |
{ |
call_t *call; |
126,8 → 152,9 |
/* TODO: Check that the callid is in the dispatch table */ |
call = (call_t *) callid; |
call->data[0] = arg1; |
call->data[1] = arg2; |
IPC_SET_RETVAL(call->data, retval); |
IPC_SET_ARG1(call->data, arg1); |
IPC_SET_ARG2(call->data, arg2); |
ipc_answer(&TASK->answerbox, call); |
return 0; |
144,10 → 171,13 |
call_t *call; |
call = ipc_wait_for_call(&TASK->answerbox, flags); |
copy_to_uspace(calldata, &call->data, sizeof(__native) * IPC_CALL_LEN); |
if (call->flags & IPC_CALL_ANSWERED) |
return ((__native)call) | 1; |
copy_to_uspace(calldata, &call->data, sizeof(call->data)); |
if (call->flags & IPC_CALL_ANSWERED) { |
ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
ipc_call_free(call); |
return ((__native)call) | IPC_CALLID_ANSWERED; |
} |
return (__native)call; |
} |
156,6 → 186,7 |
sys_ctl, |
sys_io, |
sys_ipc_call_sync, |
sys_ipc_call_sync_medium, |
sys_ipc_call_async, |
sys_ipc_answer, |
sys_ipc_wait_for_call |
/kernel/trunk/generic/src/ipc/ns.c |
---|
0,0 → 1,74 |
/* |
* Copyright (C) 2006 Ondrej Palkovsky |
* 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. |
*/ |
#include <ipc/ipc.h> |
#include <ipc/ns.h> |
#include <print.h> |
#include <proc/thread.h> |
#include <arch.h> |
#include <panic.h> |
static answerbox_t ns_answerbox; |
/** */ |
static void ns_thread(void *data) |
{ |
call_t *call; |
printf("Name service started.\n"); |
while (1) { |
call = ipc_wait_for_call(&ns_answerbox, 0); |
switch (IPC_GET_METHOD(call->data)) { |
case NS_PING: |
printf("Ping.\n"); |
IPC_SET_RETVAL(call->data, 0); |
break; |
default: |
printf("Unsupported name service call.\n"); |
IPC_SET_RETVAL(call->data, -1); |
} |
ipc_answer(&ns_answerbox, call); |
} |
} |
/** Name service initialization and start |
* |
* This must be started before any task that communicates with name service |
*/ |
void ns_start(void) |
{ |
thread_t *t; |
ipc_answerbox_init(&ns_answerbox); |
ipc_phone_0 = &ns_answerbox; |
if ((t = thread_create(ns_thread, NULL, TASK, 0))) |
thread_ready(t); |
else |
panic("thread_create/phonecompany"); |
} |
/kernel/trunk/generic/src/ipc/ipc.c |
---|
31,7 → 31,8 |
* First the answerbox, then the phone |
*/ |
#include <synch/waitq.h> |
#include <synch/condvar.h> |
#include <synch/mutex.h> |
#include <ipc/ipc.h> |
#include <errno.h> |
#include <mm/slab.h> |
43,7 → 44,8 |
#include <print.h> |
#include <proc/thread.h> |
answerbox_t *ipc_central_box; |
/* Open channel that is assigned automatically to new tasks */ |
answerbox_t *ipc_phone_0 = NULL; |
static slab_cache_t *ipc_call_slab; |
63,6 → 65,13 |
return call; |
} |
/** Initialize allocated call */ |
void ipc_call_init(call_t *call) |
{ |
call->callerbox = &TASK->answerbox; |
call->flags = IPC_CALL_STATIC_ALLOC; |
} |
/** Deallocate call stracuture */ |
void ipc_call_free(call_t *call) |
{ |
73,8 → 82,8 |
*/ |
void ipc_answerbox_init(answerbox_t *box) |
{ |
spinlock_initialize(&box->lock, "abox_lock"); |
waitq_initialize(&box->wq); |
mutex_initialize(&box->mutex); |
condvar_initialize(&box->cv); |
list_initialize(&box->connected_phones); |
list_initialize(&box->calls); |
list_initialize(&box->dispatched_calls); |
88,9 → 97,10 |
spinlock_initialize(&phone->lock, "phone_lock"); |
phone->callee = box; |
spinlock_lock(&box->lock); |
mutex_lock(&box->mutex); |
list_append(&phone->list, &box->connected_phones); |
spinlock_unlock(&box->lock); |
mutex_unlock(&box->mutex); |
} |
/** Disconnect phone from answerbox */ |
100,9 → 110,9 |
ASSERT(box); |
spinlock_lock(&box->lock); |
mutex_lock(&box->mutex); |
list_remove(&phone->list); |
spinlock_unlock(&box->lock); |
mutex_unlock(&box->mutex); |
} |
/** Helper function to facilitate synchronous calls */ |
130,10 → 140,10 |
ASSERT(box); |
spinlock_lock(&box->lock); |
mutex_lock(&box->mutex); |
list_append(&request->list, &box->calls); |
spinlock_unlock(&box->lock); |
waitq_wakeup(&box->wq, 0); |
mutex_unlock(&box->mutex); |
condvar_signal(&box->cv); |
} |
/** Answer message back to phone |
147,15 → 157,14 |
request->flags |= IPC_CALL_ANSWERED; |
spinlock_lock(&box->lock); |
spinlock_lock(&callerbox->lock); |
mutex_lock(&box->mutex); |
list_remove(&request->list); |
mutex_unlock(&box->mutex); |
list_remove(&request->list); |
mutex_lock(&callerbox->mutex); |
list_append(&request->list, &callerbox->answers); |
waitq_wakeup(&callerbox->wq, 0); |
spinlock_unlock(&callerbox->lock); |
spinlock_unlock(&box->lock); |
mutex_unlock(&callerbox->mutex); |
condvar_signal(&callerbox->cv); |
} |
/** Wait for phone call |
167,30 → 176,30 |
{ |
call_t *request; |
if ((flags & IPC_WAIT_NONBLOCKING)) { |
if (waitq_sleep_timeout(&box->wq,SYNCH_NO_TIMEOUT,SYNCH_NON_BLOCKING) == ESYNCH_WOULD_BLOCK) |
return 0; |
} else { |
waitq_sleep(&box->wq); |
} |
// TODO - might need condition variable+mutex if we want to support |
// removing of requests from queue before dispatch |
spinlock_lock(&box->lock); |
/* Handle answers first */ |
mutex_lock(&box->mutex); |
while (1) { |
if (!list_empty(&box->answers)) { |
/* Handle asynchronous answers */ |
request = list_get_instance(box->answers.next, call_t, list); |
list_remove(&request->list); |
} else { |
ASSERT (! list_empty(&box->calls)); |
} else if (!list_empty(&box->calls)) { |
/* Handle requests */ |
request = list_get_instance(box->calls.next, call_t, list); |
list_remove(&request->list); |
/* Append request to dispatch queue */ |
list_append(&request->list, &box->dispatched_calls); |
} else { |
if (!(flags & IPC_WAIT_NONBLOCKING)) { |
condvar_wait(&box->cv, &box->mutex); |
continue; |
} |
spinlock_unlock(&box->lock); |
if (condvar_trywait(&box->cv, &box->mutex) != ESYNCH_WOULD_BLOCK) |
continue; |
request = NULL; |
} |
break; |
} |
mutex_unlock(&box->mutex); |
return request; |
} |
202,32 → 211,3 |
0, |
NULL, NULL, 0); |
} |
static void ipc_phonecompany_thread(void *data) |
{ |
call_t *call; |
printf("Phone company started.\n"); |
while (1) { |
call = ipc_wait_for_call(&TASK->answerbox, 0); |
printf("Received phone call - %P %P\n", |
call->data[0], call->data[1]); |
call->data[0] = 0xbabaaaee;; |
call->data[1] = 0xaaaaeeee; |
ipc_answer(&TASK->answerbox, call); |
printf("Call answered.\n"); |
} |
} |
void ipc_create_phonecompany(void) |
{ |
thread_t *t; |
if ((t = thread_create(ipc_phonecompany_thread, "phonecompany", |
TASK, 0))) |
thread_ready(t); |
else |
panic("thread_create/phonecompany"); |
ipc_central_box = &TASK->answerbox; |
} |
/kernel/trunk/Makefile |
---|
134,7 → 134,8 |
generic/src/synch/semaphore.c \ |
generic/src/synch/waitq.c \ |
generic/src/smp/ipi.c \ |
generic/src/ipc/ipc.c |
generic/src/ipc/ipc.c \ |
generic/src/ipc/ns.c |
## Test sources |
# |