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NDMA (view source)

Revision as of 06:17, 25 November 2010

262 bytes removed ,  06:17, 25 November 2010
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Line 7: Line 7:  
!  WIDTH
 
!  WIDTH
 
|-
 
|-
−
|  REG_NDMA_MASTER_CNT
+
|  REG_NDMAGCNT
 
|  0x04004100
 
|  0x04004100
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_SRC(n)
+
|  REG_NDMASAD(n)
 
|  0x04004104 + (n*0x1c)
 
|  0x04004104 + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_DEST(n)
+
|  REG_NDMADAD(n)
 
|  0x04004108 + (n*0x1c)
 
|  0x04004108 + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_NUM0(n)
+
|  REG_NDMATCNT(n)
 
|  0x0400410c + (n*0x1c)
 
|  0x0400410c + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_NUM1(n)
+
|  REG_NDMAWCNT(n)
 
|  0x04004110 + (n*0x1c)
 
|  0x04004110 + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_14(n)
+
|  REG_NDMABCNT(n)
 
|  0x04004114 + (n*0x1c)
 
|  0x04004114 + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_CLEAR(n)
+
|  REG_NDMAFDATA(n)
 
|  0x04004118 + (n*0x1c)
 
|  0x04004118 + (n*0x1c)
 
|  4
 
|  4
 
|-
 
|-
−
|  REG_NDMA_CNT(n)
+
|  REG_NDMACNT(n)
 
|  0x0400411c + (n*0x1c)
 
|  0x0400411c + (n*0x1c)
 
|  4
 
|  4
 
|}
 
|}
   −
== REG_NDMA_MASTER_CNT ==
+
== REG_NDMAGCNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
 
!  DESCRIPTION
 
!  DESCRIPTION
 
|-
 
|-
−
|  15-0
+
|  19-16
−
|  ?
+
|  Cycle selection.
−
|-
  −
|  16
  −
|  Unknown, set when initialized by Arm7?
  −
|-
  −
|  17
  −
|  Unknown, set when initialized by Arm9?
  −
|-
  −
|  18
  −
|  Unknown, set when initialized by Arm7/Arm9?
  −
|-
  −
|  30-19
  −
|  ?
   
|-
 
|-
 
|  31
 
|  31
−
|  Might be master NDMA enable, when initialized this is set?
+
|  DMA arbitration method. 0=Fixed method, 1=Round robin
 
|}
 
|}
   −
== REG_NDMA_SRC ==
+
== REG_NDMASAD ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|-
 
|-
 
|  31-0
 
|  31-0
−
|  Source data address.
+
|  Source data address. Must be multiple of 4.
 
|}
 
|}
 
Like old DMA, REG_NDMA_SRC is copied to internal registers when written to.
 
Like old DMA, REG_NDMA_SRC is copied to internal registers when written to.
   −
== REG_NDMA_DEST ==
+
== REG_NDMADAD ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|-
 
|-
 
|  31-0
 
|  31-0
−
|  Destination data address.
+
|  Destination data address. Must be multiple of 4.
 
|}
 
|}
 
Like old DMA, REG_NDMA_DEST is copied to internal registers when written to.
 
Like old DMA, REG_NDMA_DEST is copied to internal registers when written to.
   −
== REG_NDMA_NUM0 ==
+
== REG_NDMATCNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|}
 
|}
   −
== REG_NDMA_NUM1 ==
+
== REG_NDMAWCNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|}
 
|}
   −
== REG_NDMA_14 ==
+
== REG_NDMABCNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|}
 
|}
   −
Once the CNT bit31 enable bit is set, starting doing the DMA once the time units specified by this register elapses?
+
== REG_NDMAFDATA ==
−
 
  −
== REG_NDMA_CLEAR ==
   
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
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|}
 
|}
   −
== REG_NDMA_CNT ==
+
== REG_NDMACNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
Neimod
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