C++ (Cpp) mtrr_set Examples

Example #1

File: linux_writecomb.c Project: ryo/netbsd-src

int
arch_phys_wc_add(unsigned long base, unsigned long size)
{
#if defined(MTRR)
	struct mtrr *mtrr;
	int n = 1;
	int id;
	int ret;

	mtrr = kmem_alloc(sizeof(*mtrr), KM_SLEEP);
	mtrr->base = base;
	mtrr->len = size;
	mtrr->type = MTRR_TYPE_WC;
	mtrr->flags = MTRR_VALID;

	/* XXX errno NetBSD->Linux */
	ret = -mtrr_set(mtrr, &n, NULL, MTRR_GETSET_KERNEL);
	if (ret) {
		KASSERT(n == 0);
		goto fail0;
	}
	KASSERT(n == 1);

	idr_preload(GFP_KERNEL);
	mutex_spin_enter(&linux_writecomb.lock);
	id = idr_alloc(&linux_writecomb.idr, mtrr, 0, 0, GFP_NOWAIT);
	mutex_spin_exit(&linux_writecomb.lock);
	idr_preload_end();
	if (id < 0)
		goto fail1;

	return id;

fail1:	KASSERT(id < 0);
	mtrr->type = 0;
	mtrr->flags = 0;
	/* XXX errno NetBSD->Linux */
	ret = -mtrr_set(mtrr, &n, NULL, MTRR_GETSET_KERNEL);
	KASSERT(ret == 0);
	KASSERT(n == 1);
	ret = id;
fail0:	KASSERT(ret < 0);
	kmem_free(mtrr, sizeof(*mtrr));
	return ret;
#else
	return -1;
#endif
}

Example #2

File: sys_machdep.c Project: avsm/openbsd-xen-sys

int
amd64_set_mtrr(struct proc *p, void *args, register_t *retval)
{
	int error, n;
	struct amd64_set_mtrr_args ua;

	if (mtrr_funcs == NULL)
		return ENOSYS;

	error = suser(p, 0);
	if (error != 0)
		return error;

	error = copyin(args, &ua, sizeof ua);
	if (error != 0)
		return error;

	error = copyin(ua.n, &n, sizeof n);
	if (error != 0)
		return error;

	error = mtrr_set(ua.mtrrp, &n, p, MTRR_GETSET_USER);
	if (n != 0)
		mtrr_commit();

	copyout(&n, ua.n, sizeof n);

	return error;
}

Example #3

File: linux_writecomb.c Project: ryo/netbsd-src

void
arch_phys_wc_del(int id)
{
#if defined(MTRR)
	struct mtrr *mtrr;
	int n;
	int ret __diagused;

	KASSERT(0 <= id);

	mutex_spin_enter(&linux_writecomb.lock);
	mtrr = idr_find(&linux_writecomb.idr, id);
	idr_remove(&linux_writecomb.idr, id);
	mutex_spin_enter(&linux_writecomb.lock);

	if (mtrr != NULL) {
		mtrr->type = 0;
		mtrr->flags = 0;
		/* XXX errno NetBSD->Linux */
		ret = -mtrr_set(mtrr, &n, NULL, MTRR_GETSET_KERNEL);
		KASSERT(ret == 0);
		KASSERT(n == 1);
		kmem_free(mtrr, sizeof(*mtrr));
	}
#endif
}

Example #4

File: drm_memory.c Project: RyanLucchese/rumpkernel-netbsd-src

int
drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
{
#if defined(MTRR) && defined(MTRR_GETSET_KERNEL)
	struct mtrr mtrrmap;
	int one = 1;

	mtrrmap.base = offset;
	mtrrmap.len = size;
	mtrrmap.type = flags;
	mtrrmap.flags = 0;
	return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
#else
	return 0;
#endif
}

Example #5

File: drm_memory.c Project: Tommmster/netbsd-avr32

int
drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
{
#ifndef DRM_NO_MTRR
	struct mtrr mtrrmap;
	int one = 1;

	DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
	mtrrmap.base = offset;
	mtrrmap.len = size;
	mtrrmap.type = flags;
	mtrrmap.flags = 0;
	return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
#else
	return 0;
#endif
}

Example #6

File: netbsd32_machdep.c Project: RyanLucchese/rumpkernel-netbsd-src

static int
x86_64_set_mtrr32(struct lwp *l, void *args, register_t *retval)
{
	struct x86_64_set_mtrr_args32 args32;
	struct mtrr32 *m32p, m32;
	struct mtrr *m64p, *mp;
	int error, i;
	int32_t n;
	size_t size;

	m64p = NULL;

	if (mtrr_funcs == NULL)
		return ENOSYS;

	error = kauth_authorize_machdep(l->l_cred, KAUTH_MACHDEP_MTRR_SET,
	    NULL, NULL, NULL, NULL);
	if (error)
		return (error);

	error = copyin(args, &args32, sizeof args32);
	if (error != 0)
		return error;

	error = copyin((void *)(uintptr_t)args32.n, &n, sizeof n);
	if (error != 0)
		return error;

	if (n <= 0 || n > (MTRR_I686_NFIXED_SOFT + MTRR_I686_NVAR_MAX)) {
		error = EINVAL;
		goto fail;
	}

	size = n * sizeof(struct mtrr);
	m64p = kmem_zalloc(size, KM_SLEEP);
	if (m64p == NULL) {
		error = ENOMEM;
		goto fail;
	}
	m32p = (struct mtrr32 *)(uintptr_t)args32.mtrrp;
	mp = m64p;
	for (i = 0; i < n; i++) {
		error = copyin(m32p, &m32, sizeof m32);
		if (error != 0)
			goto fail;
		mp->base = m32.base;
		mp->len = m32.len;
		mp->type = m32.type;
		mp->flags = m32.flags;
		mp->owner = m32.owner;
		m32p++;
		mp++;
	}

	error = mtrr_set(m64p, &n, l->l_proc, 0);
fail:
	if (m64p != NULL)
		kmem_free(m64p, size);
	if (error != 0)
		n = 0;
	copyout(&n, (void *)(uintptr_t)args32.n, sizeof n);
	return error;
}