paddr_t
getppages(unsigned long npages)
{
int spl;
paddr_t addr;
spl = splhigh();
// coremap not setup
if (!coremap_ready){
addr = ram_stealmem(npages);
splx(spl);
return addr;
}
// coremap setup already
assert(coremap_ready == 1);
if (npages == 1){
addr = coremap_alloc_one_page(NULL);
splx(spl);
return addr;
}
else {
addr = coremap_alloc_multi_page(npages);
splx(spl);
return addr;
}
panic("getppages: unexpected return\n");
}
/*
* alloc_kpages
*
* Allocate some kernel-space virtual pages.
* This is the interface kmalloc uses to get pages for its use.
*
* Synchronization: takes coremap_spinlock.
* May block to swap pages out.
*/
vaddr_t
alloc_kpages(int npages)
{
paddr_t pa;
if (npages > 1) {
pa = coremap_alloc_multipages(npages);
}
else {
pa = coremap_alloc_one_page(NULL, 0 /* dopin */);
}
if (pa==INVALID_PADDR) {
return 0;
}
return PADDR_TO_KVADDR(pa);
}
/*
* coremap_allocuser
*
* Allocate a page for a user-level process, to hold the passed-in
* logical page.
*
* Synchronization: takes coremap_spinlock.
* May block to swap pages out.
*/
paddr_t
coremap_allocuser(struct lpage *lp)
{
KASSERT(!curthread->t_in_interrupt);
return coremap_alloc_one_page(lp, 1 /* dopin */);
}
