From a23197980e40d4d9414bcfaf59005a1dc2a89251 Mon Sep 17 00:00:00 2001 From: sreejith Date: Wed, 29 Mar 2017 01:15:02 -0400 Subject: Added vpp intial source code from master branch 17.01.1 Change-Id: I81bdace6f330825a1746a853766779dfb24765fd Signed-off-by: sreejith --- vpp/vlib/vlib/physmem.h | 108 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 vpp/vlib/vlib/physmem.h (limited to 'vpp/vlib/vlib/physmem.h') diff --git a/vpp/vlib/vlib/physmem.h b/vpp/vlib/vlib/physmem.h new file mode 100644 index 00000000..9e7d52a6 --- /dev/null +++ b/vpp/vlib/vlib/physmem.h @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * physmem.h: virtual <-> physical memory mapping for VLIB buffers + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef included_vlib_physmem_h +#define included_vlib_physmem_h + +typedef struct +{ + uword start, end, size; +} vlib_physmem_region_t; + +typedef struct +{ + vlib_physmem_region_t virtual; + + uword log2_n_bytes_per_page; + + /* 1 << log2_n_bytes_per_page - 1. */ + uword page_mask; + + u64 *page_table; + + /* is fake physmem */ + u8 is_fake; +} vlib_physmem_main_t; + +always_inline u64 +vlib_physmem_offset_to_physical (vlib_physmem_main_t * pm, uword o) +{ + uword page_index = o >> pm->log2_n_bytes_per_page; + ASSERT (o < pm->virtual.size); + ASSERT (pm->page_table[page_index] != 0); + return (vec_elt (pm->page_table, page_index) + (o & pm->page_mask)); +} + +always_inline int +vlib_physmem_is_virtual (vlib_physmem_main_t * pm, uword p) +{ + return p >= pm->virtual.start && p < pm->virtual.end; +} + +always_inline uword +vlib_physmem_offset_of (vlib_physmem_main_t * pm, void *p) +{ + uword a = pointer_to_uword (p); + uword o; + + ASSERT (vlib_physmem_is_virtual (pm, a)); + o = a - pm->virtual.start; + + /* Offset must fit in 32 bits. */ + ASSERT ((uword) o == a - pm->virtual.start); + + return o; +} + +always_inline void * +vlib_physmem_at_offset (vlib_physmem_main_t * pm, uword offset) +{ + ASSERT (offset < pm->virtual.size); + return uword_to_pointer (pm->virtual.start + offset, void *); +} + +#endif /* included_vlib_physmem_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg