/*===========================================================================*
* main *
*===========================================================================*/
int main(void)
{
kipc_msg_t msg;
int result, who_e;
#if SANITYCHECKS
incheck = nocheck = 0;
FIXME("VM SANITYCHECKS are on");
#endif
vm_paged = 1;
env_parse("vm_paged", "d", 0, &vm_paged, 0, 1);
#if SANITYCHECKS
env_parse("vm_sanitychecklevel", "d", 0, &vm_sanitychecklevel, 0, SCL_MAX);
#endif
vm_init();
/* This is VM's main loop. */
while (TRUE) {
int r, c;
SANITYCHECK(SCL_TOP);
if(missing_spares > 0) {
pt_cycle(); /* pagetable code wants to be called */
}
SANITYCHECK(SCL_DETAIL);
if ((r=kipc_module_call(KIPC_RECEIVE, 0, ENDPT_ANY, &msg)) != 0)
vm_panic("receive() error", r);
SANITYCHECK(SCL_DETAIL);
if(msg.m_type & NOTIFY_MESSAGE) {
switch(msg.m_source) {
case SYSTEM:
/* Kernel wants to have memory ranges
* verified, and/or pagefaults handled.
*/
do_memory();
break;
case HARDWARE:
do_pagefaults();
break;
case PM_PROC_NR:
/* PM sends a notify() on shutdown, which
* is OK and we ignore.
*/
break;
default:
/* No-one else should send us notifies. */
printk("VM: ignoring notify() from %d\n",
msg.m_source);
break;
}
continue;
}
who_e = msg.m_source;
c = CALLNUMBER(msg.m_type);
result = -ENOSYS; /* Out of range or restricted calls return this. */
if(c < 0 || !vm_calls[c].vmc_func) {
printk("VM: out of range or missing callnr %d from %d\n",
msg.m_type, who_e);
} else if (vm_acl_ok(who_e, c) != 0) {
printk("VM: unauthorized %s by %d\n",
vm_calls[c].vmc_name, who_e);
} else {
SANITYCHECK(SCL_FUNCTIONS);
result = vm_calls[c].vmc_func(&msg);
SANITYCHECK(SCL_FUNCTIONS);
}
/* Send reply message, unless the return code is SUSPEND,
* which is a pseudo-result suppressing the reply message.
*/
if(result != SUSPEND) {
SANITYCHECK(SCL_DETAIL);
msg.m_type = result;
if((r=kipc_module_call(KIPC_SEND, 0, who_e, &msg)) != 0) {
printk("VM: couldn't send %d to %d (err %d)\n",
msg.m_type, who_e, r);
vm_panic("send() error", NO_NUM);
}
SANITYCHECK(SCL_DETAIL);
}
SANITYCHECK(SCL_DETAIL);
}
return 0;
}
/*===========================================================================*
* main *
*===========================================================================*/
int main(void)
{
message msg;
int result, who_e, rcv_sts;
int caller_slot;
/* Initialize system so that all processes are runnable */
init_vm();
/* Register init callbacks. */
sef_setcb_init_restart(sef_cb_init_fail);
sef_setcb_signal_handler(sef_cb_signal_handler);
/* Let SEF perform startup. */
sef_startup();
SANITYCHECK(SCL_TOP);
/* This is VM's main loop. */
while (TRUE) {
int r, c;
SANITYCHECK(SCL_TOP);
if(missing_spares > 0) {
pt_cycle(); /* pagetable code wants to be called */
}
if ((r=sef_receive_status(ANY, &msg, &rcv_sts)) != OK)
panic("sef_receive_status() error: %d", r);
if (is_ipc_notify(rcv_sts)) {
/* Unexpected notify(). */
printf("VM: ignoring notify() from %d\n", msg.m_source);
continue;
}
who_e = msg.m_source;
if(vm_isokendpt(who_e, &caller_slot) != OK)
panic("invalid caller %d", who_e);
c = CALLNUMBER(msg.m_type);
result = ENOSYS; /* Out of range or restricted calls return this. */
if(msg.m_type == RS_INIT && msg.m_source == RS_PROC_NR) {
result = do_rs_init(&msg);
} else if (msg.m_type == VM_PAGEFAULT) {
if (!IPC_STATUS_FLAGS_TEST(rcv_sts, IPC_FLG_MSG_FROM_KERNEL)) {
printf("VM: process %d faked VM_PAGEFAULT "
"message!\n", msg.m_source);
}
do_pagefaults(&msg);
pt_clearmapcache();
/*
* do not reply to this call, the caller is unblocked by
* a sys_vmctl() call in do_pagefaults if success. VM panics
* otherwise
*/
continue;
} else if(c < 0 || !vm_calls[c].vmc_func) {
/* out of range or missing callnr */
} else {
if (vm_acl_ok(who_e, c) != OK) {
printf("VM: unauthorized %s by %d\n",
vm_calls[c].vmc_name, who_e);
} else {
SANITYCHECK(SCL_FUNCTIONS);
result = vm_calls[c].vmc_func(&msg);
SANITYCHECK(SCL_FUNCTIONS);
}
}
/* Send reply message, unless the return code is SUSPEND,
* which is a pseudo-result suppressing the reply message.
*/
if(result != SUSPEND) {
msg.m_type = result;
if((r=send(who_e, &msg)) != OK) {
printf("VM: couldn't send %d to %d (err %d)\n",
msg.m_type, who_e, r);
panic("send() error");
}
}
}
return(OK);
}