From 0e4e0b5d71b15e1f4edf31295fc95d45d4ae3890 Mon Sep 17 00:00:00 2001
From: Paul Selkirk <paul@psgd.org>
Date: Tue, 10 Feb 2015 13:51:40 -0500
Subject: First stage of integration cleanup.

Add local SHA core wrappers, due to the need for registered outputs.
Remove unused demo-adder code, and reorganize sw directory.
---
 sw/test-adder/test-adder.c | 206 ---------------------------------------------
 1 file changed, 206 deletions(-)
 delete mode 100644 sw/test-adder/test-adder.c

(limited to 'sw/test-adder/test-adder.c')

diff --git a/sw/test-adder/test-adder.c b/sw/test-adder/test-adder.c
deleted file mode 100644
index 70415d8..0000000
--- a/sw/test-adder/test-adder.c
+++ /dev/null
@@ -1,206 +0,0 @@
-//------------------------------------------------------------------------------
-// setup-eim.c
-//------------------------------------------------------------------------------
-
-
-//------------------------------------------------------------------------------
-// Headers
-//------------------------------------------------------------------------------
-#include <stdio.h>
-#include <stdlib.h>
-#include "novena-eim.h"
-
-
-//------------------------------------------------------------------------------
-// Demo Adder
-//------------------------------------------------------------------------------
-#define DEMO_ADDER_BASE_ADDR	(0x3210)
-#define DEMO_ADDER_REG_X		(EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (0<<2))
-#define DEMO_ADDER_REG_Y		(EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (1<<2))
-#define DEMO_ADDER_REG_Z		(EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (2<<2))
-#define DEMO_ADDER_REG_SC		(EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (3<<2))
-
-
-//------------------------------------------------------------------------------
-// Prototypes
-//------------------------------------------------------------------------------
-unsigned int	demo_adder_test_round	(unsigned int, unsigned int);
-unsigned int	lfsr_next_x				(unsigned int);
-unsigned int	lfsr_next_y				(unsigned int);
-
-
-//------------------------------------------------------------------------------
-// Testing Parameters
-//------------------------------------------------------------------------------
-const int	NUM_TEST_ROUNDS		= 10000;
-const int	PRINT_XYZ_VALUES	= 1;
-
-
-//------------------------------------------------------------------------------
-int main()
-//------------------------------------------------------------------------------
-{
-		// try to setup eim (return value should be 1)
-	printf("Configuring EIM .. ");
-	int ok = eim_setup();
-	if (ok < 1)
-	{	printf("ERROR\n");
-		return EXIT_FAILURE;
-	}
-	else printf("OK\n");
-	
-		// run test
-	int i;
-	unsigned int x = 0x12341234, y = 0xABCDABCD, zyx;
-	printf("Testing started.\n");
-	for (i=0; i<NUM_TEST_ROUNDS; i++)
-	{	
-			// run another round
-		unsigned int z = demo_adder_test_round(x, y);
-		
-			// calculate correct answer
-		zyx = x + y;
-
-			// check result
-		if (z != zyx)
-		{	printf("ERROR: round %10d of %10d: x == 0x%08X, y == 0x%08X, z == 0x%08X [z should be 0x%08X]\n", i+1, NUM_TEST_ROUNDS, x, y, z, zyx);
-			exit(EXIT_FAILURE);
-		}
-		else if (PRINT_XYZ_VALUES) printf("OK: round %10d of %10d: x == 0x%08X, y == 0x%08X, z == 0x%08X\n", i+1, NUM_TEST_ROUNDS, x, y, z);
-		
-			// update input values
-		x = lfsr_next_x(x);
-		y = lfsr_next_x(y);
-	}
-	
-		// ok
-	printf("Testing completed successfully.\n");
-	
-		// done
-	return EXIT_SUCCESS;
-}
-
-
-//------------------------------------------------------------------------------
-unsigned int demo_adder_test_round(unsigned int x, unsigned int y)
-//------------------------------------------------------------------------------
-{
-		// write x
-	eim_write_32(DEMO_ADDER_REG_X, &x);
-	
-		// write y
-	eim_write_32(DEMO_ADDER_REG_Y, &y);
-	
-		/* To make adder calculate something we need to change its control register,
-		 * so we read it, increment and write back. Control register is in the lower 16 bits.
-		 */
-	unsigned int ctl;
-	eim_read_32(DEMO_ADDER_REG_SC, &ctl);
-	ctl += 1;
-	ctl &= 0x0000FFFF;
-	eim_write_32(DEMO_ADDER_REG_SC, &ctl);
-	
-		/* When adder is done, it will write new control value into its status register. Adder has 1-cycle latency
-		 * which is very small, we don't even need to poll, just check that status was updated. Status register is
-		 * in the upper 16 bits.
-		 */
-	unsigned int sts;
-	eim_read_32(DEMO_ADDER_REG_SC, &sts);
-	sts >>= 16;
-	if (sts != ctl)
-	{	printf("ERROR: Adder timeout!\n");
-		exit(EXIT_FAILURE);
-	}
-
-		// read z
-	unsigned int z;
-	eim_read_32(DEMO_ADDER_REG_Z, &z);
-	
-		// uncomment to trigger an error
-	/**
-	z++;
-	**/
-	
-		// done
-	return z;
-}
-
-
-//------------------------------------------------------------------------------
-unsigned int lfsr_next_x(unsigned int value)
-//------------------------------------------------------------------------------
-{
-	//
-	// [32, 31, 29, 28, 27, 25, 24, 23, 21, 19, 17, 14, 10, 6, 4, 2]
-	//   0   1   3   4   5   7   8   9  11  13  15  18  22 24 28 30
-	//
-	
-	unsigned int carry = 0;
-
-	carry ^= (value >>  0);
-	carry ^= (value >>  1);
-	carry ^= (value >>  3);
-	carry ^= (value >>  4);
-
-	carry ^= (value >>  5);
-	carry ^= (value >>  7);
-	carry ^= (value >>  8);
-	carry ^= (value >>  9);
-
-	carry ^= (value >> 11);
-	carry ^= (value >> 13);
-	carry ^= (value >> 15);
-	carry ^= (value >> 18);
-
-	carry ^= (value >> 22);
-	carry ^= (value >> 24);
-	carry ^= (value >> 28);
-	carry ^= (value >> 30);
-
-	value >>= 1, value |= (carry << 31);
-
-	return value;
-}
-
-
-//------------------------------------------------------------------------------
-unsigned int lfsr_next_y(unsigned int value)
-//------------------------------------------------------------------------------
-{
-	//
-	// [32, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 1]
-	//   0  15  16  17  18  19  20  21  22 23 24 25 26 27 28 31
-	//
-	
-	unsigned int carry = 0;
-
-	carry ^= (value >>  0);
-	carry ^= (value >> 15);
-	carry ^= (value >> 16);
-	carry ^= (value >> 17);
-
-	carry ^= (value >> 18);
-	carry ^= (value >> 19);
-	carry ^= (value >> 20);
-	carry ^= (value >> 21);
-
-	carry ^= (value >> 22);
-	carry ^= (value >> 23);
-	carry ^= (value >> 24);
-	carry ^= (value >> 25);
-
-	carry ^= (value >> 26);
-	carry ^= (value >> 27);
-	carry ^= (value >> 28);
-	carry ^= (value >> 31);
-
-	value >>= 1, value |= (carry << 31);
-
-	return value;
-}	
-
-
-
-//------------------------------------------------------------------------------
-// End-of-File
-//------------------------------------------------------------------------------
-- 
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