diff options
Diffstat (limited to '')
-rw-r--r-- | purgatory/arch/ia64/console-ia64.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/purgatory/arch/ia64/console-ia64.c b/purgatory/arch/ia64/console-ia64.c new file mode 100644 index 0000000..99d97ca --- /dev/null +++ b/purgatory/arch/ia64/console-ia64.c @@ -0,0 +1,47 @@ +#include <purgatory.h> +#include "io.h" + +#define VGABASE UNCACHED(0xb8000) + +/* code based on i386 console code + * TODO add serial support + */ +#define MAX_YPOS 25 +#define MAX_XPOS 80 + +unsigned long current_ypos = 1, current_xpos = 0; + +static void putchar_vga(int ch) +{ + int i, k, j; + + if (current_ypos >= MAX_YPOS) { + /* scroll 1 line up */ + for (k = 1, j = 0; k < MAX_YPOS; k++, j++) { + for (i = 0; i < MAX_XPOS; i++) { + writew(readw(VGABASE + 2*(MAX_XPOS*k + i)), + VGABASE + 2*(MAX_XPOS*j + i)); + } + } + for (i = 0; i < MAX_XPOS; i++) + writew(0x720, VGABASE + 2*(MAX_XPOS*j + i)); + current_ypos = MAX_YPOS-1; + } + if (ch == '\n') { + current_xpos = 0; + current_ypos++; + } else if (ch != '\r') { + writew(((0x7 << 8) | (unsigned short) ch), + VGABASE + 2*(MAX_XPOS*current_ypos + + current_xpos++)); + if (current_xpos >= MAX_XPOS) { + current_xpos = 0; + current_ypos++; + } + } +} + +void putchar(int ch) +{ + putchar_vga(ch); +} |