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Add coreboot framebuffer support to libpayload

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Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> 



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5295 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
2010-03-25 18:56:26 +00:00
committed by Stefan Reinauer
parent 7208f6e031
commit b700254aa5
11 changed files with 359 additions and 17 deletions
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21
payloads/libpayload/drivers/video/vga.c
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@@ -30,13 +30,15 @@
#include <libpayload.h>
#include <video_console.h>
struct video_console vga_video_console;
#define VGA_COLOR_WHITE 7
#define CRTC_INDEX 0x3d4
#define CRTC_DATA 0x3d5
#define VIDEO(_r, _c)\
((u16 *) (phys_to_virt(0xB8000) + ((_r) * (VIDEO_COLS * 2)) + ((_c) * 2)))
((u16 *) (phys_to_virt(0xB8000) + ((_r) * (vga_video_console.columns * 2)) + ((_c) * 2)))
static u8 crtc_read(u8 index)
{
@@ -56,8 +58,8 @@ static void vga_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
addr = ((unsigned int) crtc_read(0x0E)) << 8;
addr += crtc_read(0x0F);
*x = addr % VIDEO_COLS;
*y = addr / VIDEO_COLS;
*x = addr % vga_video_console.columns;
*y = addr / vga_video_console.columns;
*en = !(crtc_read(0x0A) & (1 << 5));
}
@@ -66,7 +68,7 @@ static void vga_set_cursor(unsigned int x, unsigned int y)
{
unsigned int addr;
addr = x + (VIDEO_COLS * y);
addr = x + (vga_video_console.columns * y);
crtc_write(addr >> 8, 0x0E);
crtc_write(addr, 0x0F);
}
@@ -89,7 +91,7 @@ static void vga_clear_line(u8 row, u8 ch, u8 attr)
int col;
u16 *ptr = VIDEO(row, 0);
for(col = 0; col < VIDEO_COLS; col++)
for(col = 0; col < vga_video_console.columns; col++)
ptr[col] = ((attr & 0xFF) << 8) | (ch & 0xFF);
}
@@ -99,16 +101,16 @@ static void vga_scroll_up(void)
u16 *dst = VIDEO(0,0);
int i;
for(i = 0; i < (VIDEO_ROWS - 1) * VIDEO_COLS; i++)
for(i = 0; i < (vga_video_console.rows - 1) * vga_video_console.columns; i++)
*dst++ = *src++;
vga_clear_line(VIDEO_ROWS - 1, ' ', VGA_COLOR_WHITE);
vga_clear_line(vga_video_console.rows - 1, ' ', VGA_COLOR_WHITE);
}
static void vga_fill(u8 ch, u8 attr)
{
u8 row;
for(row = 0; row < VIDEO_ROWS; row++)
for(row = 0; row < vga_video_console.rows; row++)
vga_clear_line(row, ch, attr);
}
@@ -151,4 +153,7 @@ struct video_console vga_video_console = {
.get_cursor = vga_get_cursor,
.set_cursor = vga_set_cursor,
.enable_cursor = vga_enable_cursor,
.columns = 80,
.rows = 25
};