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endian.h: Add be32dec/be32enc family of functions 

Libpayload has a family of functions that can "encode" or "decode" an
endian-specific integer onto a byte stream pointer. These allow writing
more pretty code than a raw be32_to_cpu/cpu_to_be32 with pointer casts
in many (de-)serialization scenarios, so let's add them to coreboot as
well.

Change-Id: I049c5665484da12b3cf977a529310b0bde177d2d
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32856
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Julius Werner 2019-05-07 17:29:21 -07:00 committed by Patrick Georgi
parent e6afab12e2
commit e8e92d60c4
1 changed files with 26 additions and 0 deletions
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26
src/include/endian.h
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@ -85,6 +85,32 @@
#define setbits_8(addr, set) setbits_8(addr, 0, set)
#ifndef __ROMCC__
/* be16dec/be32dec/be64dec/le16dec/le32dec/le64dec family of functions. */
#define DEFINE_ENDIAN_DEC(endian, width) \
static inline uint##width##_t endian##width##dec(const void *p) \
{ \
return endian##width##_to_cpu(*(uint##width##_t *)p); \
}
DEFINE_ENDIAN_DEC(be, 16)
DEFINE_ENDIAN_DEC(be, 32)
DEFINE_ENDIAN_DEC(be, 64)
DEFINE_ENDIAN_DEC(le, 16)
DEFINE_ENDIAN_DEC(le, 32)
DEFINE_ENDIAN_DEC(le, 64)
/* be16enc/be32enc/be64enc/le16enc/le32enc/le64enc family of functions. */
#define DEFINE_ENDIAN_ENC(endian, width) \
static inline void endian##width##enc(void *p, uint##width##_t u) \
{ \
*(uint##width##_t *)p = cpu_to_##endian##width(u); \
}
DEFINE_ENDIAN_ENC(be, 16)
DEFINE_ENDIAN_ENC(be, 32)
DEFINE_ENDIAN_ENC(be, 64)
DEFINE_ENDIAN_ENC(le, 16)
DEFINE_ENDIAN_ENC(le, 32)
DEFINE_ENDIAN_ENC(le, 64)
/*
* Portable (API) endian support that can be used in code that is shared
* with userspace (man 3 endian) tools.