From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Tue, 15 May 2018 09:57:09 +0000 (+0200)
Subject: tpm: add macros to enhance TPM commands readability
X-Git-Tag: v2018.07-rc1~80
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=f6872816ce07b6b26c9b6a4b1ba9206805d9321d;p=u-boot

tpm: add macros to enhance TPM commands readability

TPM commands are much easier to read/write with these macros that will
transform words or integers into byte strings. This way, there is no
need to call pack_byte_string() while all variable length in a command
are known (and at must 4 bytes, which is a lot of them).

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
---

diff --git a/lib/tpm-utils.h b/lib/tpm-utils.h
index bc98d1ef8f..a9cb7dc7ee 100644
--- a/lib/tpm-utils.h
+++ b/lib/tpm-utils.h
@@ -12,6 +12,12 @@
 /* Internal error of TPM command library */
 #define TPM_LIB_ERROR ((u32)~0u)
 
+/* To make strings of commands more easily */
+#define __MSB(x) ((x) >> 8)
+#define __LSB(x) ((x) & 0xFF)
+#define tpm_u16(x) __MSB(x), __LSB(x)
+#define tpm_u32(x) tpm_u16((x) >> 16), tpm_u16((x) & 0xFFFF)
+
 /**
  * tpm_open() - Request access to locality 0 for the caller
  *