diff options
Diffstat (limited to 'sys/dev/vt/hw/efifb/efifb.c')
| -rw-r--r-- | sys/dev/vt/hw/efifb/efifb.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/sys/dev/vt/hw/efifb/efifb.c b/sys/dev/vt/hw/efifb/efifb.c index d521cc3..b3347f7 100644 --- a/sys/dev/vt/hw/efifb/efifb.c +++ b/sys/dev/vt/hw/efifb/efifb.c @@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$"); static vd_init_t vt_efifb_init; static vd_probe_t vt_efifb_probe; +static void vt_efifb_remap(void *efifb_data); static struct vt_driver vt_efifb_driver = { .vd_name = "efifb", @@ -68,6 +69,8 @@ static struct vt_driver vt_efifb_driver = { static struct fb_info local_info; VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver); +SYSINIT(efifb_remap, SI_SUB_KMEM, SI_ORDER_ANY, vt_efifb_remap, &local_info); + static int vt_efifb_probe(struct vt_device *vd) { @@ -133,9 +136,9 @@ vt_efifb_init(struct vt_device *vd) info->fb_size = info->fb_height * info->fb_stride; info->fb_pbase = efifb->fb_addr; /* - * We could use pmap_mapdev here except that the kernel pmap - * hasn't been created yet and hence any attempt to lock it will - * fail. + * Use the direct map as a crutch until pmap is available. Once pmap + * is online, the framebuffer will be remapped by vt_efifb_remap() + * using pmap_mapdev_attr(). */ info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); @@ -163,3 +166,22 @@ vt_efifb_init(struct vt_device *vd) return (CN_INTERNAL); } + +static void +vt_efifb_remap(void *xinfo) +{ + struct fb_info *info = xinfo; + + if (info->fb_pbase == 0) + return; + + /* + * Remap as write-combining. This massively improves performance and + * happens very early in kernel initialization, when everything is + * still single-threaded and interrupts are off, so replacing the + * mapping address is safe. + */ + info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase, + info->fb_size, VM_MEMATTR_WRITE_COMBINING); +} + |
