1 files changed, 104 insertions, 0 deletions
diff --git a/src/include/ipxe/linux/linux_uaccess.h b/src/include/ipxe/linux/linux_uaccess.h
new file mode 100644
index 000000000..1b4961177
--- /dev/null
+++ b/src/include/ipxe/linux/linux_uaccess.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <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 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 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 */