C++ (Cpp) mtrr_get Examples

Example #1

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

int
amd64_get_mtrr(struct proc *p, void *args, register_t *retval)
{
	struct amd64_get_mtrr_args ua;
	int error, n;

	if (mtrr_funcs == NULL)
		return ENOSYS;

	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_get(ua.mtrrp, &n, p, MTRR_GETSET_USER);

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

	return error;
}

Example #2

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

static int
x86_64_get_mtrr32(struct lwp *l, void *args, register_t *retval)
{
	struct x86_64_get_mtrr_args32 args32;
	int error, i;
	int32_t n;
	struct mtrr32 *m32p, m32;
	struct mtrr *m64p, *mp;
	size_t size;

	m64p = NULL;

	if (mtrr_funcs == NULL)
		return ENOSYS;

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

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

	if (args32.mtrrp == 0) {
		n = (MTRR_I686_NFIXED_SOFT + MTRR_I686_NVAR_MAX);
		return copyout(&n, (void *)(uintptr_t)args32.n, sizeof n);
	}

	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))
		return EINVAL;

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