[PATCH] crypto: crc32: make crc32 available in PBL

[Johannes Zink]

crc32 may be required in PBL for checking data integrity. Add
CONFIG_CRC32_EARLY to kconfig which allows adding crc32 also in the PBL.

As the PBL has no dynamic allocation, do not use dynamic CRC table
generation when CRC32 is added in PBL.

Signed-off-by: Johannes Zink <j.zink at pengutronix.de>
---
To: Barebox Mailing List <barebox at lists.infradead.org>
Cc: Johannes Zink <j.zink at pengutronix.de>
Cc: patchwork-jzi at pengutronix.de
---
 crypto/Kconfig  | 3 +++
 crypto/Makefile | 1 +
 crypto/crc32.c  | 6 +++---
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 04e5ef43705b..6e18b5868061 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -5,6 +5,9 @@ menu "Crypto support"
 config CRC32
 	bool
 
+config CRC32_EARLY
+	bool
+
 config CRC_ITU_T
 	bool
 
diff --git a/crypto/Makefile b/crypto/Makefile
index 22035d4f69ee..24e1f3d91797 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_DIGEST_SHA1_GENERIC)	+= sha1.o
 obj-$(CONFIG_DIGEST_SHA224_GENERIC)	+= sha2.o
 obj-$(CONFIG_DIGEST_SHA256_GENERIC)	+= sha2.o
 pbl-y					+= sha2.o digest.o
+lwl-$(CONFIG_CRC32_EARLY)		+= crc32.o
 obj-$(CONFIG_DIGEST_SHA384_GENERIC)	+= sha4.o
 obj-$(CONFIG_DIGEST_SHA512_GENERIC)	+= sha4.o
 obj-y	+= memneq.o
diff --git a/crypto/crc32.c b/crypto/crc32.c
index 95cb2212db2b..284d39351682 100644
--- a/crypto/crc32.c
+++ b/crypto/crc32.c
@@ -22,7 +22,7 @@
 #define STATIC static inline
 #endif
 
-#ifdef CONFIG_DYNAMIC_CRC_TABLE
+#if defined(CONFIG_DYNAMIC_CRC_TABLE) && !defined(__PBL__)
 
 static uint32_t *crc_table;
 
@@ -145,7 +145,7 @@ STATIC uint32_t crc32(uint32_t crc, const void *_buf, unsigned int len)
 {
     const unsigned char *buf = _buf;
 
-#ifdef CONFIG_DYNAMIC_CRC_TABLE
+#if defined(CONFIG_DYNAMIC_CRC_TABLE) && !defined(__PBL__)
 	if (!crc_table)
 		make_crc_table();
 #endif
@@ -171,7 +171,7 @@ STATIC uint32_t crc32_no_comp(uint32_t crc, const void *_buf, unsigned int len)
 {
    const unsigned char *buf = _buf;
 
-#ifdef CONFIG_DYNAMIC_CRC_TABLE
+#if defined(CONFIG_DYNAMIC_CRC_TABLE) && !defined(__PBL__)
 	if (!crc_table)
 		make_crc_table();
 #endif

---
base-commit: bef38b18eeb5d2f1fac334fb8b831e47261e099c
change-id: 20230829-crc32_in_pbl-4d824629d4e2

Best regards,
-- 
Johannes Zink <j.zink at pengutronix.de>