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https://github.com/seL4/seL4.git
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51966d4508
Mention that it can be Ok for regions to overflow. State explicitly that the end is exclusive. Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*
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* Copyright 2014, General Dynamics C4 Systems
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#pragma once
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#include <stdint.h>
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#include <arch/types.h>
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/* arch/types.h is supposed to define word_t and _seL4_word_fmt */
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#ifndef _seL4_word_fmt
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#error "missing _seL4_word_fmt"
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#endif
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/* Using multiple macro layers may look strange, but this is required to make
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* the preprocessor fully evaluate all macro parameters first and then pass the
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* result as parameter to the next macro layer. This allows passing macros as
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* parameters also, and not just plain strings. The final concatenation will
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* always be from the strings behind all macros then - and not the macro names
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* that are passed as parameters.
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*/
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#define _macro_concat_helper2(x,y,z) x ## y ## z
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#define _macro_concat_helper(x,y,z) _macro_concat_helper2(x,y,z)
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#define _macro_str_concat_helper2(x) #x
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#define _macro_str_concat_helper1(x,y) _macro_str_concat_helper2(x ## y)
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#define _macro_str_concat(x,y) _macro_str_concat_helper1(x,y)
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#define SEL4_PRIu_word _macro_str_concat(_seL4_word_fmt, u)
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#define SEL4_PRIx_word _macro_str_concat(_seL4_word_fmt, x)
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#define SEL4_PRI_word SEL4_PRIu_word
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/* The C parser from the verification toolchain requires declaring word_t
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* constants without casting integer values to word_t. Since the printf() format
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* specifiers are aligned with the C integer type suffixes, _seL4_word_fmt can
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* be used there also.
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*/
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#define SEL4_WORD_CONST(x) _macro_concat_helper(x, _seL4_word_fmt, u)
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enum _bool {
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false = 0,
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true = 1
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};
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typedef word_t bool_t;
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/**
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* A region [start..end) of kernel-virtual memory.
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*
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* Empty when start == end. If end < start, the region wraps around, that is,
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* it represents the addresses in the set [start..-1] union [0..end). This is
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* possible after address translation and fine for e.g. device memory regions.
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*/
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typedef struct region {
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pptr_t start; /* inclusive */
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pptr_t end; /* exclusive */
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} region_t;
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/** A region [start..end) of physical memory addresses. */
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typedef struct p_region {
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paddr_t start; /* inclusive */
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paddr_t end; /* exclusive */
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} p_region_t;
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/** A region [start..end) of user-virtual addresses. */
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typedef struct v_region {
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vptr_t start; /* inclusive */
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vptr_t end; /* exclusive */
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} v_region_t;
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#define REG_EMPTY (region_t){ .start = 0, .end = 0 }
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#define P_REG_EMPTY (p_region_t){ .start = 0, .end = 0 }
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/* equivalent to a word_t except that we tell the compiler that we may alias with
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* any other type (similar to a char pointer) */
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typedef word_t __attribute__((__may_alias__)) word_t_may_alias;
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/* for libsel4 headers that the kernel shares */
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typedef uint8_t seL4_Uint8;
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typedef uint16_t seL4_Uint16;
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typedef uint32_t seL4_Uint32;
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typedef word_t seL4_Word;
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typedef cptr_t seL4_CPtr;
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typedef node_id_t seL4_NodeId;
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typedef paddr_t seL4_PAddr;
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typedef dom_t seL4_Domain;
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