struct buf * geteblk_special(size_t size, uint32_t control)
{
struct proc_info * proc = proc_ref(0);
const uintptr_t kvaddr = get_ksect_addr(size);
struct buf * buf;
int err;
KASSERT(proc, "Can't get the PCB of pid 0");
proc_unref(proc);
if (kvaddr == 0) {
KERROR_DBG("Returned kvaddr is NULL\n");
return NULL;
}
buf = vm_newsect(kvaddr, size, VM_PROT_READ | VM_PROT_WRITE);
if (!buf) {
KERROR_DBG("vm_newsect() failed\n");
return NULL;
}
buf->b_mmu.control = control;
err = vm_insert_region(proc, buf, VM_INSOP_MAP_REG);
if (err < 0) {
panic("Mapping a kernel special buffer failed");
}
buf->b_data = buf->b_mmu.vaddr; /* Should be same as kvaddr */
return buf;
}
struct buf * geteblk_special(size_t size, uint32_t control)
{
struct proc_info * p = proc_get_struct(0);
const uintptr_t paddr = get_ksect_addr(size);
struct vm_pt * vpt;
struct buf * buf;
if (!p)
panic("Can't get the PCB of pid 0");
if (paddr == 0)
return NULL;
buf = proc_newsect(paddr, size, VM_PROT_READ | VM_PROT_WRITE);
if (!buf)
return buf;
buf->b_mmu.control = control;
vpt = ptlist_get_pt(&p->mm.ptlist_head, &p->mm.mpt,
buf->b_mmu.vaddr);
if (!vpt) {
panic("Mapping a kernel special buffer failed");
}
buf->b_mmu.pt = &vpt->pt;
vm_map_region(buf, vpt);
vm_add_region(&p->mm, buf);
buf->b_data = buf->b_mmu.vaddr;
return buf;
}
