addr_t vmi_pagetable_lookup (vmi_instance_t vmi, addr_t dtb, addr_t vaddr)
{
page_info_t info = {0};
/* check if entry exists in the cachec */
if (VMI_SUCCESS == v2p_cache_get(vmi, vaddr, dtb, &info.paddr)) {
/* verify that address is still valid */
uint8_t value = 0;
if (VMI_SUCCESS == vmi_read_8_pa(vmi, info.paddr, &value)) {
return info.paddr;
}
else {
v2p_cache_del(vmi, vaddr, dtb);
}
}
if(vmi->arch_interface && vmi->arch_interface->v2p) {
vmi->arch_interface->v2p(vmi, dtb, vaddr, &info);
} else {
errprint("Arch interface not initialized, can't use vmi_pagetable_lookup!\n");
}
/* add this to the cache */
if (info.paddr) {
v2p_cache_set(vmi, vaddr, dtb, info.paddr);
}
return info.paddr;
}
/*
* Return a status when page_info is not needed, but also use the cache,
* which vmi_pagetable_lookup_extended() does not do.
*
* TODO: Should this eventually replace vmi_pagetable_lookup() in the API?
*/
status_t vmi_pagetable_lookup_cache(
vmi_instance_t vmi,
addr_t dtb,
addr_t vaddr,
addr_t *paddr)
{
status_t ret = VMI_FAILURE;
page_info_t info = { .vaddr = vaddr,
.dtb = dtb
};
if(!paddr) return ret;
*paddr = 0;
/* check if entry exists in the cache */
if (VMI_SUCCESS == v2p_cache_get(vmi, vaddr, dtb, paddr)) {
/* verify that address is still valid */
uint8_t value = 0;
if (VMI_SUCCESS == vmi_read_8_pa(vmi, *paddr, &value)) {
return VMI_SUCCESS;
}
else {
if ( VMI_FAILURE == v2p_cache_del(vmi, vaddr, dtb) )
return VMI_FAILURE;
}
}
if(vmi->arch_interface && vmi->arch_interface->v2p) {
ret = vmi->arch_interface->v2p(vmi, dtb, vaddr, &info);
} else {
errprint("Invalid paging mode during vmi_pagetable_lookup\n");
ret = VMI_FAILURE;
}
/* add this to the cache */
if (ret == VMI_SUCCESS) {
*paddr = info.paddr;
v2p_cache_set(vmi, vaddr, dtb, info.paddr);
}
return ret;
}
