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-rw-r--r--arch/x86_64/kernel/early_printk.c23
1 files changed, 10 insertions, 13 deletions
diff --git a/arch/x86_64/kernel/early_printk.c b/arch/x86_64/kernel/early_printk.c
index 484025f4f083..a8a6aa70d695 100644
--- a/arch/x86_64/kernel/early_printk.c
+++ b/arch/x86_64/kernel/early_printk.c
@@ -17,9 +17,6 @@
17#define VGABASE ((void __iomem *)0xffffffff800b8000UL) 17#define VGABASE ((void __iomem *)0xffffffff800b8000UL)
18#endif 18#endif
19 19
20#define MAX_YPOS max_ypos
21#define MAX_XPOS max_xpos
22
23static int max_ypos = 25, max_xpos = 80; 20static int max_ypos = 25, max_xpos = 80;
24static int current_ypos = 25, current_xpos = 0; 21static int current_ypos = 25, current_xpos = 0;
25 22
@@ -29,26 +26,26 @@ static void early_vga_write(struct console *con, const char *str, unsigned n)
29 int i, k, j; 26 int i, k, j;
30 27
31 while ((c = *str++) != '\0' && n-- > 0) { 28 while ((c = *str++) != '\0' && n-- > 0) {
32 if (current_ypos >= MAX_YPOS) { 29 if (current_ypos >= max_ypos) {
33 /* scroll 1 line up */ 30 /* scroll 1 line up */
34 for (k = 1, j = 0; k < MAX_YPOS; k++, j++) { 31 for (k = 1, j = 0; k < max_ypos; k++, j++) {
35 for (i = 0; i < MAX_XPOS; i++) { 32 for (i = 0; i < max_xpos; i++) {
36 writew(readw(VGABASE + 2*(MAX_XPOS*k + i)), 33 writew(readw(VGABASE+2*(max_xpos*k+i)),
37 VGABASE + 2*(MAX_XPOS*j + i)); 34 VGABASE + 2*(max_xpos*j + i));
38 } 35 }
39 } 36 }
40 for (i = 0; i < MAX_XPOS; i++) 37 for (i = 0; i < max_xpos; i++)
41 writew(0x720, VGABASE + 2*(MAX_XPOS*j + i)); 38 writew(0x720, VGABASE + 2*(max_xpos*j + i));
42 current_ypos = MAX_YPOS-1; 39 current_ypos = max_ypos-1;
43 } 40 }
44 if (c == '\n') { 41 if (c == '\n') {
45 current_xpos = 0; 42 current_xpos = 0;
46 current_ypos++; 43 current_ypos++;
47 } else if (c != '\r') { 44 } else if (c != '\r') {
48 writew(((0x7 << 8) | (unsigned short) c), 45 writew(((0x7 << 8) | (unsigned short) c),
49 VGABASE + 2*(MAX_XPOS*current_ypos + 46 VGABASE + 2*(max_xpos*current_ypos +
50 current_xpos++)); 47 current_xpos++));
51 if (current_xpos >= MAX_XPOS) { 48 if (current_xpos >= max_xpos) {
52 current_xpos = 0; 49 current_xpos = 0;
53 current_ypos++; 50 current_ypos++;
54 } 51 }