more special cases in PRD length tested

ahci/ahci_dma.v

@@ -447,7 +447,7 @@ module  ahci_dma (
         
         if      (prd_wr)     qw_datawr_last <= qwcount[21:3] == 0;
 ///     else if (afi_wvalid) qw_datawr_last <= qw_datawr_burst == 1;        
-        else if (afi_wvalid) qw_datawr_last <= (qw_datawr_burst == 1) || (qw_datawr_last && !(|qw_datawr_left[21:3])); // last case - n*16 + 1 (last burst single)       
+        else if (afi_wvalid) qw_datawr_last <= (qw_datawr_burst == 1) || (qw_datawr_last && (qw_datawr_left[21:3] == 16)); // last case - n*16 + 1 (last burst single)       
         
         if      (prd_wr)                                                      qw_datawr_burst <= (|qwcount[21:7])? 4'hf: qwcount[6:3];
 ///     else if (afi_wvalid && qw_datawr_last && (qw_datawr_left[21:7] == 0)) qw_datawr_burst <= qw_datawr_left[6:3]; // if not last roll over to 'hf

tb/tb_ahci.tf

@@ -895,9 +895,11 @@ initial begin //Host
     
     maxigp1_print        (HBA_PORT__PxSSTS__DET__ADDR << 2,"HBA_PORT__PxSSTS__DET__ADDR");
     
-    setup_pio_read_identify_command_simple(1); // prdt interrupt for entry 0
-//    setup_pio_read_identify_command_shifted(1); // prdt interrupt for entry 0
-//    setup_pio_read_identify_command_multi4(1,27,71,83); // prdt interrupt for entry 0
+//  setup_pio_read_identify_command_simple(1); // prdt interrupt for entry 0
+//  setup_pio_read_identify_command_shifted(1); // prdt interrupt for entry 0
+/// setup_pio_read_identify_command_multi4(1,27,71,83); // prdt interrupt for entry 0
+/// setup_pio_read_identify_command_multi4(1,27,64,83); // prdt interrupt for entry 0
+    setup_pio_read_identify_command_multi4(1,64,63,64); // prdt interrupt for entry 0
     maxigp1_print        (HBA_PORT__PxCI__CI__ADDR << 2,"HBA_PORT__PxCI__CI__ADDR");
     
     maxigp1_writep       (HBA_PORT__PxIE__PSE__ADDR << 2, HBA_PORT__PxIE__PSE__MASK); // allow PS only interrupts (PIO setup)

tb_ahci_01.sav

 [*]
 [*] GTKWave Analyzer v3.3.66 (w)1999-2015 BSI
-[*] Wed Jan 27 20:13:54 2016
+[*] Wed Jan 27 20:37:20 2016
 [*]
-[dumpfile] "/home/andrey/git/x393_sata/simulation/tb_ahci-20160127131132886.fst"
-[dumpfile_mtime] "Wed Jan 27 20:12:01 2016"
-[dumpfile_size] 3824547
+[dumpfile] "/home/andrey/git/x393_sata/simulation/tb_ahci-20160127133150634.fst"
+[dumpfile_mtime] "Wed Jan 27 20:32:21 2016"
+[dumpfile_size] 3824683
 [savefile] "/home/andrey/git/x393_sata/tb_ahci_01.sav"
-[timestart] 24704000
-[size] 1823 1180
+[timestart] 22094000
+[size] 1823 1173
 [pos] 1994 0
-*-16.995279 25103334 23903334 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
+*-19.117058 23716667 23903334 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
 [treeopen] tb_ahci.
 [treeopen] tb_ahci.dev.phy.
 [treeopen] tb_ahci.dut.