e4d7abc0d4
The devicetree data structures have been available in more than just ramstage and romstage. In order to provide clearer and consistent semantics two new macros are provided: 1. DEVTREE_EARLY which is true when !ENV_RAMSTAGE 2. DEVTREE_CONST as a replacment for ROMSTAGE_CONST The ROMSTAGE_CONST attribute is used in the source code to mark the devicetree data structures as const in early stages even though it's not just romstage. Therefore, rename the attribute to DEVTREE_CONST as that's the actual usage. The only place where the usage was not devicetree related is console_loglevel, but the same name was used for consistency. Any stage that is not ramstage has the const C attribute applied when DEVTREE_CONST is used. Change-Id: Ibd51c2628dc8f68e0896974f7e4e7c8588d333ed Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/19333 Tested-by: build bot (Jenkins) Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com> Reviewed-by: Furquan Shaikh <furquan@google.com>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
#ifndef STDDEF_H
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#define STDDEF_H
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#include <commonlib/helpers.h>
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#include <rules.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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/* The devicetree data structures are only mutable in ramstage. All other
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stages have a constant devicetree. */
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#if !ENV_RAMSTAGE
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#define DEVTREE_EARLY 1
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#else
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#define DEVTREE_EARLY 0
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#endif
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#if DEVTREE_EARLY
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#define DEVTREE_CONST const
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#else
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#define DEVTREE_CONST
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#endif
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/* Work around non-writable data segment in execute-in-place romstage on x86. */
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#if defined(__PRE_RAM__) && CONFIG_ARCH_X86
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#define MAYBE_STATIC
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#else
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#define MAYBE_STATIC static
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#endif
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#ifndef __ROMCC__
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/* Provide a pointer to address 0 that thwarts any "accessing this is
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* undefined behaviour and do whatever" trickery in compilers.
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* Use when you _really_ need to read32(zeroptr) (ie. read address 0).
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*/
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extern char zeroptr[];
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#endif
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#endif /* STDDEF_H */
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