static void mmap_msync(void)
{
u32 *map;
int i;
int fd = eopen(Option.file, O_RDWR | O_CREAT | O_TRUNC);
epwrite(fd, "", 1, FILE_SIZE - 1);
map = emmap(0, FILE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
for (i = 0; i < NUM_INTS; i++)
map[i] = 2 * i;
emsync(map, FILE_SIZE, MS_SYNC);
crash();
}
void fb_init(struct framebuffer *fb)
{
char *path;
struct fb_fix_screeninfo finfo;
struct fb_var_screeninfo vinfo;
if ((path = getenv("FRAMEBUFFER")) != NULL)
fb->fd = eopen(path, O_RDWR);
else
fb->fd = eopen(fb_path, O_RDWR);
if (ioctl(fb->fd, FBIOGET_FSCREENINFO, &finfo) < 0)
fatal("ioctl: FBIOGET_FSCREENINFO failed");
if (ioctl(fb->fd, FBIOGET_VSCREENINFO, &vinfo) < 0)
fatal("ioctl: FBIOGET_VSCREENINFO failed");
/* check screen offset and initialize because linux console change this */
/*
if (vinfo.xoffset != 0 || vinfo.yoffset != 0) {
vinfo.xoffset = vinfo.yoffset = 0;
ioctl(fb->fd, FBIOPUT_VSCREENINFO, &vinfo);
}
*/
fb->width = vinfo.xres;
fb->height = vinfo.yres;
fb->screen_size = finfo.smem_len;
fb->line_length = finfo.line_length;
if ((finfo.visual == FB_VISUAL_TRUECOLOR || finfo.visual == FB_VISUAL_DIRECTCOLOR)
&& (vinfo.bits_per_pixel == 15 || vinfo.bits_per_pixel == 16
|| vinfo.bits_per_pixel == 24 || vinfo.bits_per_pixel == 32)) {
fb->cmap = fb->cmap_org = NULL;
fb->bpp = my_ceil(vinfo.bits_per_pixel, BITS_PER_BYTE);
}
else if (finfo.visual == FB_VISUAL_PSEUDOCOLOR && vinfo.bits_per_pixel == 8) {
cmap_create(&fb->cmap_org);
if (ioctl(fb->fd, FBIOGETCMAP, fb->cmap_org) < 0)
fatal("ioctl: FBIOGETCMAP failed");
fb->cmap = NULL;
fb->bpp = 1;
}
else /* non packed pixel, mono color, grayscale: not implimented */
fatal("unsupported framebuffer type");
fb->fp = (unsigned char *) emmap(0, fb->screen_size, PROT_WRITE | PROT_READ, MAP_SHARED, fb->fd, 0);
fb->buf = (unsigned char *) ecalloc(1, fb->screen_size);
fb->vinfo = vinfo;
}
