Changeset db3341e in mainline for arch/amd64/src/mm/page.c

Timestamp:

2005-09-01T14:28:00Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

623ba26c

Parents:

1dde3b61

Message:

Fixed typo in 'outb' instruction.
Paging basically working.

File:

• arch/amd64/src/mm/page.c (modified) (1 diff)

arch/amd64/src/mm/page.c

@@ -28 +28 @@
 
 #include <mm/page.h>
+#include <mm/frame.h>
 #include <arch/mm/page.h>
+#include <arch/interrupt.h>
+#include <arch/asm.h>
+#include <config.h>
+
+#include <memstr.h>
+
+
+__address bootstrap_dba; 
 
 void page_arch_init(void)
 {
+        __address dba;
+        count_t i;
+
+        if (config.cpu_active == 1) {
+                dba = frame_alloc(FRAME_KA | FRAME_PANIC);
+                memsetb(dba, PAGE_SIZE, 0);
+
+                bootstrap_dba = dba;
+
+                /*
+                 * Identity mapping for all frames.
+                 * PA2KA(identity) mapping for all frames.
+                 */
+                for (i = 0; i < frames; i++) {
+                        map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba));
+                        map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba));
+                }
+
+                trap_register(14, page_fault);
+                write_cr3(KA2PA(dba));
+        }
+        else {
+                /*
+                 * Application processors need to create their own view of the
+                 * virtual address space. Because of that, each AP copies
+                 * already-initialized paging information from the bootstrap
+                 * processor and adjusts it to fulfill its needs.
+                 */
+
+                dba = frame_alloc(FRAME_KA | FRAME_PANIC);
+                memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE);
+                write_cr3(KA2PA(dba));
+        }
 }