avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/crypto/ace_sha.c

@@ -0,0 +1,184 @@
+/*
+ * Advanced Crypto Engine - SHA Firmware
+ * Copyright (c) 2012  Samsung Electronics
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include "ace_sha.h"
+
+#ifdef CONFIG_SHA_HW_ACCEL
+#include <u-boot/sha256.h>
+#include <u-boot/sha1.h>
+#include <asm/errno.h>
+
+/* SHA1 value for the message of zero length */
+static const unsigned char sha1_digest_emptymsg[SHA1_SUM_LEN] = {
+	0xDA, 0x39, 0xA3, 0xEE, 0x5E, 0x6B, 0x4B, 0x0D,
+	0x32, 0x55, 0xBF, 0xFF, 0x95, 0x60, 0x18, 0x90,
+	0xAF, 0xD8, 0x07, 0x09};
+
+/* SHA256 value for the message of zero length */
+static const unsigned char sha256_digest_emptymsg[SHA256_SUM_LEN] = {
+	0xE3, 0xB0, 0xC4, 0x42, 0x98, 0xFC, 0x1C, 0x14,
+	0x9A, 0xFB, 0xF4, 0xC8, 0x99, 0x6F, 0xB9, 0x24,
+	0x27, 0xAE, 0x41, 0xE4, 0x64, 0x9B, 0x93, 0x4C,
+	0xA4, 0x95, 0x99, 0x1B, 0x78, 0x52, 0xB8, 0x55};
+
+int ace_sha_hash_digest(const unsigned char *pbuf, unsigned int buf_len,
+			unsigned char *pout, unsigned int hash_type)
+{
+	unsigned int i, reg, len;
+	unsigned int *pdigest;
+	struct exynos_ace_sfr *ace_sha_reg =
+		(struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+
+	if (buf_len == 0) {
+		/* ACE H/W cannot compute hash value for empty string */
+		if (hash_type == ACE_SHA_TYPE_SHA1)
+			memcpy(pout, sha1_digest_emptymsg, SHA1_SUM_LEN);
+		else
+			memcpy(pout, sha256_digest_emptymsg, SHA256_SUM_LEN);
+		return 0;
+	}
+
+	/* Flush HRDMA */
+	writel(ACE_FC_HRDMACFLUSH_ON, &ace_sha_reg->fc_hrdmac);
+	writel(ACE_FC_HRDMACFLUSH_OFF, &ace_sha_reg->fc_hrdmac);
+
+	/* Set byte swap of data in */
+	writel(ACE_HASH_SWAPDI_ON | ACE_HASH_SWAPDO_ON | ACE_HASH_SWAPIV_ON,
+	       &ace_sha_reg->hash_byteswap);
+
+	/* Select Hash input mux as external source */
+	reg = readl(&ace_sha_reg->fc_fifoctrl);
+	reg = (reg & ~ACE_FC_SELHASH_MASK) | ACE_FC_SELHASH_EXOUT;
+	writel(reg, &ace_sha_reg->fc_fifoctrl);
+
+	/* Set Hash as SHA1 or SHA256 and start Hash engine */
+	reg = (hash_type == ACE_SHA_TYPE_SHA1) ?
+		ACE_HASH_ENGSEL_SHA1HASH : ACE_HASH_ENGSEL_SHA256HASH;
+	reg |= ACE_HASH_STARTBIT_ON;
+	writel(reg, &ace_sha_reg->hash_control);
+
+	/* Enable FIFO mode */
+	writel(ACE_HASH_FIFO_ON, &ace_sha_reg->hash_fifo_mode);
+
+	/* Set message length */
+	writel(buf_len, &ace_sha_reg->hash_msgsize_low);
+	writel(0, &ace_sha_reg->hash_msgsize_high);
+
+	/* Set HRDMA */
+	writel((unsigned int)pbuf, &ace_sha_reg->fc_hrdmas);
+	writel(buf_len, &ace_sha_reg->fc_hrdmal);
+
+	while ((readl(&ace_sha_reg->hash_status) & ACE_HASH_MSGDONE_MASK) ==
+		ACE_HASH_MSGDONE_OFF) {
+		/*
+		 * PRNG error bit goes HIGH if a PRNG request occurs without
+		 * a complete seed setup. We are using this bit to check h/w
+		 * fault because proper setup is not expected in that case.
+		 */
+		if ((readl(&ace_sha_reg->hash_status)
+			& ACE_HASH_PRNGERROR_MASK) == ACE_HASH_PRNGERROR_ON)
+			return -EBUSY;
+	}
+
+	/* Clear MSG_DONE bit */
+	writel(ACE_HASH_MSGDONE_ON, &ace_sha_reg->hash_status);
+
+	/* Read hash result */
+	pdigest = (unsigned int *)pout;
+	len = (hash_type == ACE_SHA_TYPE_SHA1) ? SHA1_SUM_LEN : SHA256_SUM_LEN;
+
+	for (i = 0; i < len / 4; i++)
+		pdigest[i] = readl(&ace_sha_reg->hash_result[i]);
+
+	/* Clear HRDMA pending bit */
+	writel(ACE_FC_HRDMA, &ace_sha_reg->fc_intpend);
+
+	return 0;
+}
+
+void hw_sha256(const unsigned char *pbuf, unsigned int buf_len,
+			unsigned char *pout, unsigned int chunk_size)
+{
+	if (ace_sha_hash_digest(pbuf, buf_len, pout, ACE_SHA_TYPE_SHA256))
+		debug("ACE was not setup properly or it is faulty\n");
+}
+
+void hw_sha1(const unsigned char *pbuf, unsigned int buf_len,
+			unsigned char *pout, unsigned int chunk_size)
+{
+	if (ace_sha_hash_digest(pbuf, buf_len, pout, ACE_SHA_TYPE_SHA1))
+		debug("ACE was not setup properly or it is faulty\n");
+}
+#endif /* CONFIG_SHA_HW_ACCEL */
+
+#ifdef CONFIG_LIB_HW_RAND
+static unsigned int seed_done;
+
+void srand(unsigned int seed)
+{
+	struct exynos_ace_sfr *reg =
+		(struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+	int i, status;
+
+	/* Seed data */
+	for (i = 0; i < ACE_HASH_PRNG_REG_NUM; i++)
+		writel(seed << i, &reg->hash_seed[i]);
+
+	/* Wait for seed setup done */
+	while (1) {
+		status = readl(&reg->hash_status);
+		if ((status & ACE_HASH_SEEDSETTING_MASK) ||
+		    (status & ACE_HASH_PRNGERROR_MASK))
+			break;
+	}
+
+	seed_done = 1;
+}
+
+unsigned int rand(void)
+{
+	struct exynos_ace_sfr *reg =
+		(struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+	int i, status;
+	unsigned int seed = (unsigned int)&status;
+	unsigned int ret = 0;
+
+	if (!seed_done)
+		srand(seed);
+
+	/* Start PRNG */
+	writel(ACE_HASH_ENGSEL_PRNG | ACE_HASH_STARTBIT_ON, &reg->hash_control);
+
+	/* Wait for PRNG done */
+	while (1) {
+		status = readl(&reg->hash_status);
+		if (status & ACE_HASH_PRNGDONE_MASK)
+			break;
+		if (status & ACE_HASH_PRNGERROR_MASK) {
+			seed_done = 0;
+			return 0;
+		}
+	}
+
+	/* Clear Done IRQ */
+	writel(ACE_HASH_PRNGDONE_MASK, &reg->hash_status);
+
+	/* Read a PRNG result */
+	for (i = 0; i < ACE_HASH_PRNG_REG_NUM; i++)
+		ret += readl(&reg->hash_prng[i]);
+
+	seed_done = 0;
+	return ret;
+}
+
+unsigned int rand_r(unsigned int *seedp)
+{
+	srand(*seedp);
+
+	return rand();
+}
+#endif /* CONFIG_LIB_HW_RAND */