03784fa97a
This patch adds a new static assertion macro that can be used to check the offsets in structures that overlay register sets at compile time. It uses the _Static_assert() declaration from the new ISO C11 standard, which is supported (even without -std=c11) by GCC after version 4.6. (There is supposedly also support in clang, although I haven't tried it... let's deal with compiler issues when/if they turn up.) I've added it to all structures for our current ARM SoCs for now, and I think every new register overlay we add going forward should use them (at least for the last member, but feel free to add more if you think it's useful). Change-Id: If32510e7049739ad05618d363a854dc372d64386 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/179412 Reviewed-by: David Hendricks <dhendrix@chromium.org> Reviewed-by: Stefan Reinauer <reinauer@chromium.org> (cherry picked from commit cef5fa13c31375a316ca4556c0039b17c8ea7900) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6905 Tested-by: build bot (Jenkins)
41 lines
976 B
C
41 lines
976 B
C
#ifndef STDDEF_H
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#define STDDEF_H
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typedef long ptrdiff_t;
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#ifndef __SIZE_TYPE__
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#define __SIZE_TYPE__ unsigned long
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#endif
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typedef __SIZE_TYPE__ size_t;
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/* There is a GCC macro for a size_t type, but not
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* for a ssize_t type. Below construct tricks GCC
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* into making __SIZE_TYPE__ signed.
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*/
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#define unsigned signed
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typedef __SIZE_TYPE__ ssize_t;
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#undef unsigned
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typedef int wchar_t;
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typedef unsigned int wint_t;
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#define NULL ((void *)0)
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/* Standard units. */
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#define KiB (1<<10)
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#define MiB (1<<20)
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#define GiB (1<<30)
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/* Could we ever run into this one? I hope we get this much memory! */
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#define TiB (1<<40)
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#define check_member(structure, member, offset) _Static_assert( \
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offsetof(struct structure, member) == offset, \
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"`struct " #structure "` offset for `" #member "` is not " #offset )
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#ifdef __PRE_RAM__
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#define ROMSTAGE_CONST const
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#else
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#define ROMSTAGE_CONST
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#endif
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#endif /* STDDEF_H */
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