Changeset ac5d02b in mainline for arch/ia32/src/drivers/ega.c

Timestamp:

2005-06-03T13:17:05Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

70527f1

Parents:

dcbc8be

Message:

IA-32 fixes.
Use kernel addresses instead of physical addresses in map_page_to_frame().
Physical addresses are supposed to only be exported to mm hardware.
Because of this fix, userspace is functional again.

Remap EGA videoram to (0x80000000 + videoram) and change the ega driver to work with the new address.

Minor cosmetics through out the code.
Changes in linker scripts.

File:

• arch/ia32/src/drivers/ega.c (modified) (3 diffs)

arch/ia32/src/drivers/ega.c

@@ -48 +48 @@
         __u8 hi, lo;
 
-        map_page_to_frame(VIDEORAM, VIDEORAM, PAGE_NOT_CACHEABLE, 0);
+        map_page_to_frame(PA2KA(VIDEORAM), VIDEORAM, PAGE_NOT_CACHEABLE, 0);
         outb(0x3d4,0xe);
         hi = inb(0x3d5);
@@ -59 +59 @@
 void ega_display_char(char ch)
 {
-        __u8 *vram = (__u8 *) VIDEORAM;
+        __u8 *vram = (__u8 *) PA2KA(VIDEORAM);
         
         vram[ega_cursor*2] = ch;
@@ -72 +72 @@
             return;
 
-        memcopy(VIDEORAM + ROW*2, VIDEORAM, (SCREEN - ROW)*2);
-        memsetw(VIDEORAM + (SCREEN - ROW)*2, ROW, 0x0720);
+        memcopy(PA2KA(VIDEORAM) + ROW*2, PA2KA(VIDEORAM), (SCREEN - ROW)*2);
+        memsetw(PA2KA(VIDEORAM) + (SCREEN - ROW)*2, ROW, 0x0720);
         ega_cursor = ega_cursor - ROW;
 }