asm.c

00001 /*
00002  * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
00003  * to the MC1322x project (http://mc1322x.devl.org)
00004  * All rights reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  * 1. Redistributions of source code must retain the above copyright
00010  *    notice, this list of conditions and the following disclaimer.
00011  * 2. Redistributions in binary form must reproduce the above copyright
00012  *    notice, this list of conditions and the following disclaimer in the
00013  *    documentation and/or other materials provided with the distribution.
00014  * 3. Neither the name of the Institute nor the names of its contributors
00015  *    may be used to endorse or promote products derived from this software
00016  *    without specific prior written permission.
00017  *
00018  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00019  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00020  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00022  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00023  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00024  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00025  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00026  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00027  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00028  * SUCH DAMAGE.
00029  *
00030  * This file is part of libmc1322x: see http://mc1322x.devl.org
00031  * for details. 
00032  *
00033  *
00034  */
00035 
00036 #include <mc1322x.h>
00037 #include <board.h>
00038 #include <stdio.h>
00039 
00040 #include "tests.h"
00041 #include "config.h"
00042 
00043 void asm_isr(void) {
00044         printf("asm isr\n\r");
00045         ASM->CONTROL0bits.CLEAR_IRQ = 1;
00046 }
00047 
00048 
00049 void main(void) {
00050         volatile int i;
00051 
00052         /* trim the reference osc. to 24MHz */
00053         trim_xtal();
00054 
00055         uart_init(INC, MOD, SAMP);
00056 
00057         vreg_init();
00058 
00059         enable_irq(ASM);
00060 
00061         print_welcome("asm");
00062 
00063         printf("ASM Control 0: %08x\n\r", (unsigned int)ASM->CONTROL0);
00064         printf("ASM Control 1: %08x\n\r", (unsigned int)ASM->CONTROL1);
00065         printf("ASM Status: %08x\n\r", (unsigned int)ASM->STATUS);
00066         printf("ASM Test pass: %d\n\r", ASM->STATUSbits.TEST_PASS);
00067 
00068         /* ASM module is disabled until self-test passes */
00069         printf("\n\r*** ASM self-test ***\n\r");
00070         
00071         ASM->CONTROL1bits.ON = 1;
00072         ASM->CONTROL1bits.SELF_TEST = 1;
00073         ASM->CONTROL0bits.START = 1;
00074 
00075         /* Self test takes 3330 periph. clocks (default 24Mhz) */
00076         /* to complete. This doesn't wait 3330 exactly, but should be long enough */
00077 
00078         for(i = 0; i < 3330; i++) { continue; }
00079 
00080         printf("ASM Test pass: %d\n\r", ASM->STATUSbits.TEST_PASS);
00081 
00082         /* must clear the self test bit when done */
00083         ASM->CONTROL1bits.SELF_TEST = 0;
00084 
00085         
00086         /* ASM starts in "BOOT" mode which uses an internal secret key
00087          * to load encrypted data from an external source */
00088         /* must set to NORMAL mode */
00089         ASM->CONTROL1bits.NORMAL_MODE = 1;
00090 
00091         /* setting the bypass bit will disable the encryption */
00092         /* bypass defaults to off */
00093         ASM->CONTROL1bits.BYPASS = 0;
00094 
00095         printf("\n\r*** set ASM key ***\n\r");
00096         ASM->KEY0 = 0xccddeeff;
00097         ASM->KEY1 = 0x8899aabb;
00098         ASM->KEY2 = 0x44556677;
00099         ASM->KEY3 = 0x00112233;
00100 
00101         /* KEY registers appear to be write-only (which is a good thing) */
00102         /* even though the datasheet says you can read them */
00103         printf("ASM Key [3,2,1,0]       : 0x%08x%08x%08x%08x\n",
00104                (unsigned int) ASM->KEY3, 
00105                (unsigned int) ASM->KEY2, 
00106                (unsigned int) ASM->KEY1, 
00107                (unsigned int) ASM->KEY0); 
00108                 
00109         printf("\n\r*** CTR test ***\n\r");
00110         printf("Encrypt\n\r");
00111         ASM->CONTROL1bits.CTR = 1;
00112 
00113         ASM->DATA0 = 0xdeaddead;
00114         ASM->DATA1 = 0xbeefbeef;
00115         ASM->DATA2 = 0xfaceface;
00116         ASM->DATA3 = 0x01234567;
00117         
00118         printf("ASM Data [3,2,1,0]      : 0x%08x%08x%08x%08x\n",
00119                (unsigned int) ASM->DATA3, 
00120                (unsigned int) ASM->DATA2, 
00121                (unsigned int) ASM->DATA1, 
00122                (unsigned int) ASM->DATA0); 
00123 
00124         ASM->CTR0 = 0x33333333;
00125         ASM->CTR1 = 0x22222222;
00126         ASM->CTR2 = 0x11111111;
00127         ASM->CTR3 = 0x00000000;
00128         
00129         printf("ASM CTR [3,2,1,0]       : 0x%08x%08x%08x%08x\n",
00130                (unsigned int) ASM->CTR3, 
00131                (unsigned int) ASM->CTR2, 
00132                (unsigned int) ASM->CTR1, 
00133                (unsigned int) ASM->CTR0);
00134 
00135         ASM->CONTROL0bits.START = 1;
00136         while(ASM->STATUSbits.DONE == 0) { continue; }
00137 
00138         printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
00139                (unsigned int) ASM->CTR3_RESULT, 
00140                (unsigned int) ASM->CTR2_RESULT, 
00141                (unsigned int) ASM->CTR1_RESULT, 
00142                (unsigned int) ASM->CTR0_RESULT);
00143 
00144         printf("Decrypt\n\r");
00145 
00146         ASM->DATA0 = ASM->CTR0_RESULT;
00147         ASM->DATA1 = ASM->CTR1_RESULT;
00148         ASM->DATA2 = ASM->CTR2_RESULT;
00149         ASM->DATA3 = ASM->CTR3_RESULT;
00150 
00151         ASM->CONTROL0bits.START = 1;
00152         while(ASM->STATUSbits.DONE == 0) { continue; }
00153 
00154         printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
00155                (unsigned int) ASM->CTR3_RESULT, 
00156                (unsigned int) ASM->CTR2_RESULT, 
00157                (unsigned int) ASM->CTR1_RESULT, 
00158                (unsigned int) ASM->CTR0_RESULT);
00159 
00160         printf("\n\r*** CBC MAC generation ***\n\r");
00161 
00162         ASM->CONTROL1bits.CTR = 0;
00163         ASM->CONTROL1bits.CBC = 1;
00164 
00165         /* CBC is like a hash */
00166         /* it doesn't use the CTR data */
00167         /* the accumulated MAC is in the MAC registers */
00168         /* you must use the CLEAR bit to reset the MAC state */
00169 
00170         ASM->DATA0 = 0xdeaddead;
00171         ASM->DATA1 = 0xbeefbeef;
00172         ASM->DATA2 = 0xfaceface;
00173         ASM->DATA3 = 0x01234567;
00174 
00175         ASM->CONTROL0bits.CLEAR  = 1;
00176 
00177         ASM->CONTROL0bits.START = 1;
00178         while(ASM->STATUSbits.DONE == 0) { continue; }
00179 
00180         printf("ASM CBC RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
00181                (unsigned int) ASM->CBC3_RESULT, 
00182                (unsigned int) ASM->CBC2_RESULT, 
00183                (unsigned int) ASM->CBC1_RESULT, 
00184                (unsigned int) ASM->CBC0_RESULT);
00185 
00186         printf("\n\r*** CCM (CTR+CBC) ***\n\r");
00187 
00188         ASM->CONTROL1bits.CTR = 1;
00189         ASM->CONTROL1bits.CBC = 1;
00190         ASM->CONTROL0bits.CLEAR  = 1;
00191 
00192         ASM->CONTROL0bits.START = 1;
00193         while(ASM->STATUSbits.DONE == 0) { continue; }
00194 
00195         printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
00196                (unsigned int) ASM->CTR3_RESULT, 
00197                (unsigned int) ASM->CTR2_RESULT, 
00198                (unsigned int) ASM->CTR1_RESULT, 
00199                (unsigned int) ASM->CTR0_RESULT);
00200 
00201         printf("ASM CBC RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
00202                (unsigned int) ASM->CBC3_RESULT, 
00203                (unsigned int) ASM->CBC2_RESULT, 
00204                (unsigned int) ASM->CBC1_RESULT, 
00205                (unsigned int) ASM->CBC0_RESULT);
00206 
00207         while(1) {              
00208         }
00209 }