diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/linux/linux_uaccess.h')
-rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/linux/linux_uaccess.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/linux/linux_uaccess.h b/qemu/roms/ipxe/src/include/ipxe/linux/linux_uaccess.h new file mode 100644 index 000000000..e4d16d9e0 --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/linux/linux_uaccess.h @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2010 Piotr JaroszyĆski <p.jaroszynski@gmail.com> + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef _IPXE_LINUX_UACCESS_H +#define _IPXE_LINUX_UACCESS_H + +FILE_LICENCE(GPL2_OR_LATER); + +/** @file + * + * iPXE user access API for linux + * + * In 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. + */ + +#ifdef UACCESS_LINUX +#define UACCESS_PREFIX_linux +#else +#define UACCESS_PREFIX_linux __linux_ +#endif + +static inline __always_inline userptr_t +UACCESS_INLINE(linux, phys_to_user)(unsigned long phys_addr) +{ + return phys_addr; +} + +static inline __always_inline unsigned long +UACCESS_INLINE(linux, user_to_phys)(userptr_t userptr, off_t offset) +{ + return userptr + offset; +} + +static inline __always_inline userptr_t +UACCESS_INLINE(linux, virt_to_user)(volatile const void *addr) +{ + return trivial_virt_to_user(addr); +} + +static inline __always_inline void * +UACCESS_INLINE(linux, user_to_virt)(userptr_t userptr, off_t offset) +{ + return trivial_user_to_virt(userptr, offset); +} + +static inline __always_inline userptr_t +UACCESS_INLINE(linux, userptr_add)(userptr_t userptr, off_t offset) +{ + return trivial_userptr_add(userptr, offset); +} + +static inline __always_inline off_t +UACCESS_INLINE(linux, userptr_sub)(userptr_t userptr, userptr_t subtrahend) +{ + return trivial_userptr_sub ( userptr, subtrahend ); +} + +static inline __always_inline void +UACCESS_INLINE(linux, memcpy_user)(userptr_t dest, off_t dest_off, userptr_t src, off_t src_off, size_t len) +{ + trivial_memcpy_user(dest, dest_off, src, src_off, len); +} + +static inline __always_inline void +UACCESS_INLINE(linux, memmove_user)(userptr_t dest, off_t dest_off, userptr_t src, off_t src_off, size_t len) +{ + trivial_memmove_user(dest, dest_off, src, src_off, len); +} + +static inline __always_inline int +UACCESS_INLINE(linux, memcmp_user)(userptr_t first, off_t first_off, userptr_t second, off_t second_off, size_t len) +{ + return trivial_memcmp_user(first, first_off, second, second_off, len); +} + +static inline __always_inline void +UACCESS_INLINE(linux, memset_user)(userptr_t buffer, off_t offset, int c, size_t len) +{ + trivial_memset_user(buffer, offset, c, len); +} + +static inline __always_inline size_t +UACCESS_INLINE(linux, strlen_user)(userptr_t buffer, off_t offset) +{ + return trivial_strlen_user(buffer, offset); +} + +static inline __always_inline off_t +UACCESS_INLINE(linux, memchr_user)(userptr_t buffer, off_t offset, int c, size_t len) +{ + return trivial_memchr_user(buffer, offset, c, len); +} + +#endif /* _IPXE_LINUX_UACCESS_H */ |