Hardware CRC32 engine in matmul IP: 4-byte/cycle combinational, register at 0x010

sdk/software/examples/asm/user-sample.c

@@ -59,46 +59,13 @@ unsigned long CORE_CLOCKS_PER_SEC    = 33000000L;
 #define STATUS_DONE       0x2
 #define STATUS_ERROR      0x4
 
+// Hardware CRC register (offset 0x010 in matmul IP)
+#define MATMUL_CRC (MATMUL_BASE_UNCACHED + 0x010)
+
 /* ─── Convenience macros ──────────────────────────────────────────── */
 #define REG_WR(addr, val) (*(volatile uint32_t *)(addr) = (uint32_t)(val))
 #define REG_RD(addr)      (*(volatile uint32_t *)(addr))
 
-/* ─── CRC32 table (IEEE 802.3, polynomial 0xEDB88320) ─────────────── */
-static const uint32_t crc32_table[256] = {
-    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
-    0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
-    0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
-    0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
-    0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
-    0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
-    0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
-    0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
-    0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
-    0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
-    0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
-    0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
-    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
-    0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
-    0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
-    0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
-    0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
-    0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
-    0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
-    0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
-    0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
-    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
-    0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
-    0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
-    0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
-    0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
-    0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
-    0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
-    0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
-    0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
-    0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
-    0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
-};
-
 static volatile int matmul_done_flag = 0;
 static volatile int dma0_done_flag   = 0;
 static volatile int dma1_done_flag   = 0;
@@ -138,29 +105,13 @@ static void wait_dma_done_intr(int ch)
     }
 }
 
-/* ─── CRC32 over ExtRAM result region ─────────────────────────────── */
-static uint32_t compute_crc32(volatile uint32_t *extram)
-{
-    uint32_t crc = 0xFFFFFFFF;
-    uint32_t i, w;
-
-    for (i = 0; i < RESULT_WORDS; i++) {
-        w = extram[DST_BASE_WORDS + i];
-        crc = crc32_table[(crc ^ (w        & 0xFF)) & 0xFF] ^ (crc >> 8);
-        crc = crc32_table[(crc ^ ((w >>  8) & 0xFF)) & 0xFF] ^ (crc >> 8);
-        crc = crc32_table[(crc ^ ((w >> 16) & 0xFF)) & 0xFF] ^ (crc >> 8);
-        crc = crc32_table[(crc ^  (w >> 24)        ) & 0xFF] ^ (crc >> 8);
-    }
-    return crc ^ 0xFFFFFFFF;
-}
-
 /* ═══════════════════════════════════════════════════════════════════ */
 int main(void)
 {
     if (MATMUL_GROUP_NUM <= 0) return 0;
 
     volatile uint32_t *extram = (volatile uint32_t *)EXTRAM_BASE_UNCACHED;
-    uint32_t crc, t_prologue, t_mainloop, t_epilogue, t_crc32;
+    uint32_t crc, t_prologue, t_mainloop, t_epilogue;
     int g;
 
     // Ping-Pong Register Address Arrays (Physical for DMA)
@@ -174,7 +125,8 @@ int main(void)
     printf("MATMUL_START\n");
 
     // 清理寄存器状态
-    REG_WR(MATMUL_STATUS, STATUS_DONE | STATUS_ERROR); 
+    REG_WR(MATMUL_STATUS, STATUS_DONE | STATUS_ERROR);
+    REG_WR(MATMUL_CRC, 0);          // 复位硬件 CRC32 为 0xFFFFFFFF 
 
     /* ── Prologue: 第0组数据初始化 ────────────────────────── */
     t_prologue = get_ns();
@@ -228,10 +180,8 @@ int main(void)
     wait_dma_done_intr(1);
     t_epilogue = get_ns() - t_epilogue;
 
-    /* ── CRC32 over result region ─────────────────────────────── */
-    t_crc32 = get_ns();
-    crc = compute_crc32(extram);
-    t_crc32 = get_ns() - t_crc32;
+    /* ── Read hardware CRC32 result ──────────────────────────── */
+    crc = REG_RD(MATMUL_CRC);
 
     /* ── Final markers ────────────────────────────────────────── */
     printf("MATMUL_CRC32=%08lx\n", (unsigned long)crc);
@@ -239,8 +189,7 @@ int main(void)
     printf("TIME_LOOP=%lu\n", (unsigned long)t_mainloop);
     printf("TIME_LOOP_PER=%lu\n", (unsigned long)(t_mainloop / MATMUL_GROUP_NUM));
     printf("TIME_EPILOGUE=%lu\n", (unsigned long)t_epilogue);
-    printf("TIME_CRC32=%lu\n", (unsigned long)t_crc32);
-    printf("TIME_TOTAL=%lu\n", (unsigned long)(t_prologue + t_mainloop + t_epilogue + t_crc32));
+    printf("TIME_TOTAL=%lu\n", (unsigned long)(t_prologue + t_mainloop + t_epilogue));
     printf("MATMUL_DONE\n");
 
     return 0;