From a320085750c421782e64c266c4c3f66a408a35e1 Mon Sep 17 00:00:00 2001 From: Piotr Jaroszyński Date: Wed, 26 May 2010 18:55:06 +0200 Subject: [linux] Add uaccess Add user access API for linux. On linux userspace virtual == user == phys addresses. Physical addresses also being the same is wrong, but there is no general way of converting userspace addresses to physical as what appears to be contiguous in userspace is physically fragmented. Currently only the DMA memory is special-cased, but its conversion to bus addresses is done in phys_to_bus. This is known to break virtio as it is passing phys addresses to the virtual device. Signed-off-by: Piotr Jaroszyński Signed-off-by: Michael Brown --- src/interface/linux/linux_uaccess.c | 38 +++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/interface/linux/linux_uaccess.c (limited to 'src/interface/linux') diff --git a/src/interface/linux/linux_uaccess.c b/src/interface/linux/linux_uaccess.c new file mode 100644 index 000000000..d4e52d093 --- /dev/null +++ b/src/interface/linux/linux_uaccess.c @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2010 Piotr Jaroszyński + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE(GPL2_OR_LATER); + +#include + +/** @file + * + * iPXE user access API for linux + * + */ + +PROVIDE_UACCESS_INLINE(linux, phys_to_user); +PROVIDE_UACCESS_INLINE(linux, user_to_phys); +PROVIDE_UACCESS_INLINE(linux, virt_to_user); +PROVIDE_UACCESS_INLINE(linux, user_to_virt); +PROVIDE_UACCESS_INLINE(linux, userptr_add); +PROVIDE_UACCESS_INLINE(linux, memcpy_user); +PROVIDE_UACCESS_INLINE(linux, memmove_user); +PROVIDE_UACCESS_INLINE(linux, memset_user); +PROVIDE_UACCESS_INLINE(linux, strlen_user); +PROVIDE_UACCESS_INLINE(linux, memchr_user); -- cgit v1.2.3-55-g7522