int ChannelQueue::Push(Channel* c) {
if (NULL != c->pre || NULL != c->next) {
mtsr(-1, "channel is already in a queue");
}
if (NULL == head) {
head = c;
tail = c;
c->pre = c->next = NULL;
} else {
tail->next = c;
c->pre = tail;
c->next = NULL;
tail = c;
}
return 0;
}
int ChannelQueue::Remove(Channel* c) {
if (NULL == c) {
mtsr(-1, "can remove a NULL channel");
}
Channel *pre = c->pre;
Channel *next = c->next;
if (head != c && NULL == pre) {
return 0;//not in the queue
}
if (tail != c && NULL == next) {
return 0;//not in the queue
}
if (head == c) {
head = next;
}
if (tail == c) {
tail = pre;
}
if (NULL != pre) {
pre->next = next;
}
if (NULL != next) {
next->pre = pre;
}
c->pre = c->next = NULL;
return 0;
}
void pmap_switch(pmap_t map)
{
unsigned int i;
#if DEBUG
if (watchacts & WA_PCB) {
printf("Switching to map at 0x%08x, space=%d\n",
map,map->space);
}
#endif /* DEBUG */
#if !DEBUG
/* when changing to kernel space (collocated servers), don't bother
* doing anything, the kernel is mapped from here already. Do change
* in the debug case, to ease debugging.
*/
if (map->space == PPC_SID_KERNEL)
return;
#endif /* 0 */
/* sr value has Ks=1, Ku=1, and vsid composed of space+seg num */
i = SEG_REG_PROT | (map->space << 4);
assert(SR_KERNEL == 0);
/* mtsr(0x0, i + 0x0); SR0 is the kernel segment! */
/* mtsr(0x1, i + 0x1); SR1 is kernel collocation space */
/* mtsr(0x2, i + 0x2); SR2 is more collocation space */
mtsr(0x3, i + 0x3);
mtsr(0x4, i + 0x4);
mtsr(0x5, i + 0x5);
mtsr(0x6, i + 0x6);
mtsr(0x7, i + 0x7);
mtsr(0x8, i + 0x8);
mtsr(0x9, i + 0x9);
mtsr(0xa, i + 0xa);
mtsr(0xb, i + 0xb);
/* mtsr(0xc, i + 0xc); Can overwrite copyin SR with no problem */
mtsr(0xd, i + 0xd);
mtsr(0xe, i + 0xe);
mtsr(0xf, i + 0xf);
/* After any segment register changes, we have to resync if
* we want to use the new translations. We don't use any
* of the above user space until after an rfi, so no need
* for us to sync now
*/
}
