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Move endianness definitions and provide it inside Makefile
Add an `endiantest.c` similar to `archtest.c` to provide the endianness inside the Makefile. The __FLASHROM_(LITTLE|BIG)_ENDIAN__ definitions had to move from `hwaccess.h` into `platform.h`, therefor. This will be used to decide whether to build the internal programmer in a follow- up. Change-Id: I55dcf5a88da48f885cda9ad89ab87395d895a891 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/22670 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: David Hendricks <david.hendricks@gmail.com>
This commit is contained in:
Nico Huber
parent
19eb0792b8
commit
095522ccec
1
Makefile
1
Makefile
@ -376,6 +376,7 @@ endif
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# (of course), but should come after any lines setting CC because the line
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# below uses CC itself.
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override ARCH := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E archtest.c 2>/dev/null | grep -v '^\#' | grep '"' | cut -f 2 -d'"'))
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override ENDIAN := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E endiantest.c 2>/dev/null | grep -v '^\#'))
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# PCI port I/O support is unimplemented on PPC/MIPS/SPARC and unavailable on ARM.
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# Right now this means the drivers below only work on x86.
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6
endiantest.c
Normal file
6
endiantest.c
Normal file
@ -0,0 +1,6 @@
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#include "platform.h"
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#if __FLASHROM_LITTLE_ENDIAN__
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little
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#else
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big
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#endif
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83
hwaccess.h
83
hwaccess.h
@ -43,89 +43,6 @@
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#undef index
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#endif /* NEED_PCI == 1 */
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/* The next big hunk tries to guess endianess from various preprocessor macros */
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/* First some error checking in case some weird header has defined both.
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* NB: OpenBSD always defines _BIG_ENDIAN and _LITTLE_ENDIAN. */
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#if defined (__LITTLE_ENDIAN__) && defined (__BIG_ENDIAN__)
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#error Conflicting endianness #define
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#endif
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#if IS_X86
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/* All x86 is little-endian. */
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif IS_MIPS
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/* MIPS can be either endian. */
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#if defined (__MIPSEL) || defined (__MIPSEL__) || defined (_MIPSEL) || defined (MIPSEL)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif defined (__MIPSEB) || defined (__MIPSEB__) || defined (_MIPSEB) || defined (MIPSEB)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif
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#elif IS_PPC
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/* PowerPC can be either endian. */
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#if defined (_BIG_ENDIAN) || defined (__BIG_ENDIAN__)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#elif defined (_LITTLE_ENDIAN) || defined (__LITTLE_ENDIAN__)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#endif
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#elif IS_ARM
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/* ARM can be either endian. */
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#if defined (__ARMEB__)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#elif defined (__ARMEL__)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#endif
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#elif IS_SPARC
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/* SPARC is big endian in general (but allows to access data in little endian too). */
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif /* IS_? */
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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/* If architecture-specific approaches fail try generic variants. First: BSD (works about everywhere). */
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#if !IS_WINDOWS
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#include <sys/param.h>
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#if defined (__BYTE_ORDER)
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define __FLASHROM_LITTLE_ENDIAN__
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define __FLASHROM_BIG_ENDIAN__
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#else
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#error Unknown byte order!
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#endif
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#endif /* defined __BYTE_ORDER */
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#endif /* !IS_WINDOWS */
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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/* Nonstandard libc-specific macros for determining endianness. */
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/* musl provides an endian.h as well... but it can not be detected from within C. */
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#if defined(__GLIBC__)
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#include <endian.h>
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif BYTE_ORDER == BIG_ENDIAN
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif
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#endif
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#endif
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#endif
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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#error Unable to determine endianness.
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#endif
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#define ___constant_swab8(x) ((uint8_t) ( \
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(((uint8_t)(x) & (uint8_t)0xffU))))
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82
platform.h
82
platform.h
@ -81,4 +81,86 @@
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#error Unknown architecture
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#endif
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/* The next big hunk tries to guess endianess from various preprocessor macros */
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/* First some error checking in case some weird header has defined both.
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* NB: OpenBSD always defines _BIG_ENDIAN and _LITTLE_ENDIAN. */
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#if defined (__LITTLE_ENDIAN__) && defined (__BIG_ENDIAN__)
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#error Conflicting endianness #define
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#endif
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#if IS_X86
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/* All x86 is little-endian. */
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif IS_MIPS
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/* MIPS can be either endian. */
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#if defined (__MIPSEL) || defined (__MIPSEL__) || defined (_MIPSEL) || defined (MIPSEL)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif defined (__MIPSEB) || defined (__MIPSEB__) || defined (_MIPSEB) || defined (MIPSEB)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif
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#elif IS_PPC
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/* PowerPC can be either endian. */
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#if defined (_BIG_ENDIAN) || defined (__BIG_ENDIAN__)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#elif defined (_LITTLE_ENDIAN) || defined (__LITTLE_ENDIAN__)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#endif
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#elif IS_ARM
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/* ARM can be either endian. */
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#if defined (__ARMEB__)
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#define __FLASHROM_BIG_ENDIAN__ 1
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#elif defined (__ARMEL__)
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#endif
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#elif IS_SPARC
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/* SPARC is big endian in general (but allows to access data in little endian too). */
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif /* IS_? */
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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/* If architecture-specific approaches fail try generic variants. First: BSD (works about everywhere). */
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#if !IS_WINDOWS
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#include <sys/param.h>
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#if defined (__BYTE_ORDER)
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define __FLASHROM_LITTLE_ENDIAN__
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define __FLASHROM_BIG_ENDIAN__
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#else
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#error Unknown byte order!
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#endif
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#endif /* defined __BYTE_ORDER */
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#endif /* !IS_WINDOWS */
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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/* Nonstandard libc-specific macros for determining endianness. */
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/* musl provides an endian.h as well... but it can not be detected from within C. */
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#if defined(__GLIBC__)
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#include <endian.h>
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define __FLASHROM_LITTLE_ENDIAN__ 1
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#elif BYTE_ORDER == BIG_ENDIAN
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#define __FLASHROM_BIG_ENDIAN__ 1
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#endif
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#endif
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#endif
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#endif
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#if !defined (__FLASHROM_BIG_ENDIAN__) && !defined (__FLASHROM_LITTLE_ENDIAN__)
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#error Unable to determine endianness.
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#endif
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#endif /* !__PLATFORM_H__ */
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