Fix to argument mixup

When reprogramming a buffer due to early overrun, R2 should be the length not the physical address.

Version 0.22. Tagged as 'DMA-0_22'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "0.21"
-Module_Version          SETA    21
+Module_MajorVersion     SETS    "0.22"
+Module_Version          SETA    22
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "18 Oct 2014"
-Module_ApplicationDate  SETS    "18-Oct-14"
+Module_Date             SETS    "02 Jun 2015"
+Module_ApplicationDate  SETS    "02-Jun-15"
 Module_ComponentName    SETS    "DMA"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/HWSupport/DMA"
-Module_FullVersion      SETS    "0.21"
-Module_HelpVersion      SETS    "0.21 (18 Oct 2014)"
+Module_FullVersion      SETS    "0.22"
+Module_HelpVersion      SETS    "0.22 (02 Jun 2015)"
                         END

VersionNum

-/* (0.21)
+/* (0.22)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        0.21
+#define Module_MajorVersion_CMHG        0.22
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                18 Oct 2014
+#define Module_Date_CMHG                02 Jun 2015
 
-#define Module_MajorVersion             "0.21"
-#define Module_Version                  21
+#define Module_MajorVersion             "0.22"
+#define Module_Version                  22
 #define Module_MinorVersion             ""
-#define Module_Date                     "18 Oct 2014"
+#define Module_Date                     "02 Jun 2015"
 
-#define Module_ApplicationDate          "18-Oct-14"
+#define Module_ApplicationDate          "02-Jun-15"
 
 #define Module_ComponentName            "DMA"
 #define Module_ComponentPath            "castle/RiscOS/Sources/HWSupport/DMA"
 
-#define Module_FullVersion              "0.21"
-#define Module_HelpVersion              "0.21 (18 Oct 2014)"
-#define Module_LibraryVersionInfo       "0:21"
+#define Module_FullVersion              "0.22"
+#define Module_HelpVersion              "0.22 (02 Jun 2015)"
+#define Module_LibraryVersionInfo       "0:22"

s/DMA

@@ -2871,6 +2871,8 @@ finished
 ;       r10 = ptr to DMA request block
 ;     [ :LNOT: HAL
 ;       r11 = IOMD base address
+;     |
+;       r11 = ptr to HAL device
 ;     ]
 ;
         Debug   int," finished"
@@ -3240,7 +3242,7 @@ reprogram
 ;
         LDR     r3, [r0, #ptab_Physical]        ; Get physical address from page table.
         ADD     r1, r3, r1                      ; r1 = start address
-        ADD     r2, r1, r2                      ; r2 = end address
+                                                ; r2 = length already
         MOV     r3, #0                          ; Default flag contents.
 
         TST     r8, #dmarf_Infinite             ; If finite transfer and