Changeset 22c3444 in mainline for kernel/arch/amd64/src/boot/boot.S

Timestamp:

2010-07-06T23:27:57Z (14 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

09b859c, 62b20f1

Parents:

97bdb4a

Message:

improve early printout scrolling speed

File:

• kernel/arch/amd64/src/boot/boot.S (modified) (3 diffs)

kernel/arch/amd64/src/boot/boot.S

@@ -247 +247 @@
                 movl $0xb80a0, %esi
                 movl $0xb8000, %edi
-                movl $1920, %ecx
-                rep movsw
+                movl $960, %ecx
+                rep movsl
                 
                 /* Clear the 24th row */
                 xorl %eax, %eax
-                movl $80, %ecx
-                rep stosw
+                movl $40, %ecx
+                rep stosl
                 
                 /* Go to row 24 */
@@ -357 +357 @@
                 movl $0xb80a0, %esi
                 movl $0xb8000, %edi
-                movl $1920, %ecx
-                rep movsw
+                movl $960, %ecx
+                rep movsl
                 
                 /* Clear the 24th row */
                 xorl %eax, %eax
-                movl $80, %ecx
-                rep stosw
+                movl $40, %ecx
+                rep stosl
                 
                 /* Go to row 24 */
@@ -516 +516 @@
                 movq $(PA2KA(0xb80a0)), %rsi
                 movq $(PA2KA(0xb8000)), %rdi
-                movq $1920, %rcx
-                rep movsw
+                movq $480, %rcx
+                rep movsq
                 
                 /* Clear the 24th row */
                 xorq %rax, %rax
-                movq $80, %rcx
-                rep stosw
+                movq $20, %rcx
+                rep stosq
                 
                 /* Go to row 24 */