From c2c4dbb6513bd938f5009e7b6293782dea37887d Mon Sep 17 00:00:00 2001 From: Thomas White Date: Sat, 22 Aug 2009 17:25:31 +0100 Subject: Zero VRAM before passing to userspace Signed-off-by: Thomas White --- drivers/mfd/glamo/glamo-cmdq.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/mfd/glamo/glamo-cmdq.c') diff --git a/drivers/mfd/glamo/glamo-cmdq.c b/drivers/mfd/glamo/glamo-cmdq.c index 6f14244af11..a96adc3cbd2 100644 --- a/drivers/mfd/glamo/glamo-cmdq.c +++ b/drivers/mfd/glamo/glamo-cmdq.c @@ -440,3 +440,21 @@ void glamo_cmdq_resume(struct glamodrm_handle *gdrm) { glamo_cmdq_init(gdrm); } + + +/* Initialise an object's contents to zero. + * This is in glamo-cmdq.c in the hope that we can accelerate it later. */ +void glamo_cmdq_blank(struct glamodrm_handle *gdrm, struct drm_gem_object *obj) +{ + char __iomem *cookie; + struct drm_glamo_gem_object *gobj; + int i; + + gobj = obj->driver_private; + + cookie = ioremap(gdrm->vram->start + gobj->block->start, obj->size); + for ( i=0; isize; i+=2 ) { + iowrite16(0, cookie+i); + } + iounmap(cookie); +} -- cgit v1.2.3