[coreboot-gerrit] Change in ...coreboot[master]: endian.h: Add be32dec/be32enc family of functions

[Julius Werner (Code Review)]

Hello Patrick Rudolph,

I'd like you to do a code review. Please visit

https://review.coreboot.org/c/coreboot/+/32856

to review the following change.

Change subject: endian.h: Add be32dec/be32enc family of functions
......................................................................

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 
---
M src/include/endian.h
1 file changed, 24 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/56/32856/1

diff --git a/src/include/endian.h b/src/include/endian.h
index 08636f3..4bd30f1 100644
--- a/src/include/endian.h
+++ b/src/include/endian.h
@@ -84,6 +84,30 @@
 #define clrbits_8(addr, clear) clrsetbits_8(addr, clear, 0)
 #define setbits_8(addr, set) setbits_8(addr, 0, set)

+/* 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)
+
 #ifndef __ROMCC__
 /*
  * Portable (API) endian support that can be used in code that is shared