void
cpu_physwindow_init(int cpu)
{
cpu_data_t *cdp = cpu_data_ptr[cpu];
cpu_desc_index_t *cdi = &cdp->cpu_desc_index;
vm_offset_t phys_window;
if (vm_allocate(kernel_map, &phys_window,
PAGE_SIZE, VM_FLAGS_ANYWHERE)
!= KERN_SUCCESS)
panic("cpu_physwindow_init: couldn't allocate phys map window");
/*
* make sure the page that encompasses the
* pte pointer we're interested in actually
* exists in the page table
*/
pmap_expand(kernel_pmap, phys_window);
cdp->cpu_physwindow_base = phys_window;
cdp->cpu_physwindow_ptep = vtopte(phys_window);
cdi->cdi_gdt[sel_idx(PHYS_WINDOW_SEL)] = physwindow_desc_pattern;
cdi->cdi_gdt[sel_idx(PHYS_WINDOW_SEL)].offset = phys_window;
fix_desc(&cdi->cdi_gdt[sel_idx(PHYS_WINDOW_SEL)], 1);
}
void kdp_machine_init(void) {
pt_entry_t *debugger_ptep;
vm_map_offset_t debugger_window_kva;
if (debug_boot_arg == 0)
return;
vm_map_entry_t e;
kern_return_t kr = vm_map_find_space(kernel_map,
&debugger_window_kva,
PAGE_SIZE, 0,
VM_MAKE_TAG(VM_MEMORY_IOKIT), &e);
if (kr != KERN_SUCCESS) {
panic("%s: vm_map_find_space failed with %d\n", __FUNCTION__, kr);
}
vm_map_unlock(kernel_map);
debugger_ptep = pmap_pte(kernel_pmap, debugger_window_kva);
if (debugger_ptep == NULL) {
pmap_expand(kernel_pmap, debugger_window_kva);
debugger_ptep = pmap_pte(kernel_pmap, debugger_window_kva);
}
}
