3dbrew

Changes

NDMA Registers (edit)

Revision as of 22:48, 10 November 2021

2,030 bytes added ,  22:48, 10 November 2021
Add device to device modes
Line 1: Line 1: −
== Registers ==
+
3DS NDMA has 8 channels. The first 0x100-bytes of this IO mem is mirrored at 0x10002100, repeated every 0x100-bytes until the end of the 0x1000-byte IO mem. NDMA can access the Arm9 bootrom, including the protected part before it is locked out.
    +
= Registers =
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  NAME
+
!  Old3DS
−
!  ADDRESS
+
!  Name
−
!  WIDTH
+
!  Address
 +
!  Width
 +
!  Used by
 
|-
 
|-
−
|  REG_NDMAGCNT
+
| style="background: green" | Yes
 +
|  [[#NDMA_GLOBAL_CNT|NDMA_GLOBAL_CNT]]
 
|  0x10002000
 
|  0x10002000
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMASAD(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_SRC_ADDR|NDMA_SRC_ADDR]](n)
 
|  0x10002004 + (n*0x1c)
 
|  0x10002004 + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMADAD(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_DST_ADDR|NDMA_DST_ADDR]](n)
 
|  0x10002008 + (n*0x1c)
 
|  0x10002008 + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMATCNT(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_TRANSFER_CNT|NDMA_TRANSFER_CNT]](n)
 
|  0x1000200c + (n*0x1c)
 
|  0x1000200c + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMAWCNT(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_WRITE_CNT|NDMA_WRITE_CNT]](n)
 
|  0x10002010 + (n*0x1c)
 
|  0x10002010 + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMABCNT(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_BLOCK_CNT|NDMA_BLOCK_CNT]](n)
 
|  0x10002014 + (n*0x1c)
 
|  0x10002014 + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMAFDATA(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_FILL_DATA|NDMA_FILL_DATA]](n)
 
|  0x10002018 + (n*0x1c)
 
|  0x10002018 + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|-
 
|-
−
|  REG_NDMACNT(n)
+
| style="background: green" | Yes
 +
|  [[#NDMA_CNT|NDMA_CNT]](n)
 
|  0x1000201C + (n*0x1c)
 
|  0x1000201C + (n*0x1c)
 
|  4
 
|  4
 +
|  Boot9, Kernel9
 
|}
 
|}
   −
== REG_NDMAGCNT ==
+
== NDMA_GLOBAL_CNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 +
|-
 +
|  0
 +
|  Global enable?
 
|-
 
|-
 
|  19-16
 
|  19-16
Line 51: Line 73:  
|}
 
|}
   −
== REG_NDMASAD ==
+
== NDMA_SRC_ADDR ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 
|-
 
|-
 
|  31-0
 
|  31-0
 
|  Source data address. Must be multiple of 4.
 
|  Source data address. Must be multiple of 4.
 
|}
 
|}
−
Like old DMA, REG_NDMASAD is copied to internal registers when written to.
+
Like old DMA, NDMA_SRC_ADDR is copied to internal registers when written to.
   −
== REG_NDMADAD ==
+
== NDMA_DST_ADDR ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  BIT
 
!  BIT
Line 69: Line 91:  
|  Destination data address. Must be multiple of 4.
 
|  Destination data address. Must be multiple of 4.
 
|}
 
|}
−
Like old DMA, REG_NDMADAD is copied to internal registers when written to.
+
Like old DMA, NDMA_DST_ADDR is copied to internal registers when written to.
   −
== REG_NDMATCNT ==
+
== NDMA_TRANSFER_CNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 
|-
 
|-
 
|  27-0
 
|  27-0
Line 80: Line 102:  
|}
 
|}
   −
== REG_NDMAWCNT ==
+
== NDMA_WRITE_CNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 
|-
 
|-
 
|  23-0
 
|  23-0
Line 89: Line 111:  
|}
 
|}
   −
== REG_NDMABCNT ==
+
== NDMA_BLOCK_CNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 
|-
 
|-
 
|  15-0
 
|  15-0
Line 101: Line 123:  
|}
 
|}
   −
== REG_NDMAFDATA ==
+
== NDMA_FILL_DATA ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 
|-
 
|-
 
|  31-0
 
|  31-0
Line 110: Line 132:  
|}
 
|}
   −
== REG_NDMACNT ==
+
== NDMA_CNT ==
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  BIT
+
!  Bit
−
!  DESCRIPTION
+
!  Description
 +
|-
 +
|  4-0
 +
|  Device to device startup mode
 
|-
 
|-
 
|  11-10
 
|  11-10
Line 146: Line 171:  
|}
 
|}
    +
== Startup modes (4-0) ==
 +
{| class="wikitable" border="1"
 +
!  Value
 +
!  Description
 +
|-
 +
| 0
 +
| TIMER0
 +
|-
 +
| 1
 +
| TIMER1
 +
|-
 +
| 2
 +
| TIMER2
 +
|-
 +
| 3
 +
| TIMER3
 +
|-
 +
| 4
 +
| CTRCARD0
 +
|-
 +
| 5
 +
| CTRCARD1
 +
|-
 +
| 6
 +
| SDIO1
 +
|-
 +
| 7
 +
| SDIO3
 +
|-
 +
| 8
 +
| AES in ([[AES_Registers#AES_WRFIFO.2FAES_RDFIFO|WRFIFO]])
 +
|-
 +
| 9
 +
| AES out ([[AES_Registers#AES_WRFIFO.2FAES_RDFIFO|RDFIFO]])
 +
|-
 +
| 10
 +
| SHA in ([[SHA_Registers#SHA_FIFO|INFIFO]])
 +
|-
 +
| 11
 +
| SHA out ([[SHA_Registers#SHA_FIFO|INFIFO]], source data readback mode)
 +
|-
 +
| 12
 +
| NTRCARD
 +
|-
 +
| 13
 +
| ?
 +
|-
 +
| 14
 +
| ?
 +
|-
 +
| 15
 +
| Device to device (subclassed by bits 4-0)
 +
|}
   −
== Startup modes (27-24) ==
+
== Device to device startup modes (4-0) ==
−
???
+
{| class="wikitable" border="1"
 +
!  Value
 +
!  Description
 +
|-
 +
| 0
 +
| CTRCARD0 -> AES
 +
|-
 +
| 1
 +
| CTRCARD1 -> AES
 +
|-
 +
| 2
 +
| AES -> CTRCARD0
 +
|-
 +
| 3
 +
| AES -> CTRCARD1
 +
|-
 +
| 4
 +
| CTRCARD0 -> SHA
 +
|-
 +
| 5
 +
| CTRCARD1 -> SHA
 +
|-
 +
| 6
 +
| SHA -> CTRCARD0
 +
|-
 +
| 7
 +
| SHA -> CTRCARD1
 +
|-
 +
| 8
 +
| SDIO1 -> AES
 +
|-
 +
| 9
 +
| SDIO3 -> AES
 +
|-
 +
| 10
 +
| AES -> SDIO1
 +
|-
 +
| 11
 +
| AES -> SDIO3
 +
|-
 +
| 12
 +
| SDIO1 -> SHA
 +
|-
 +
| 13
 +
| SDIO3 -> SHA
 +
|-
 +
| 14
 +
| SHA -> SDIO1
 +
|-
 +
| 15
 +
| SHA -> SDIO3
 +
|-
 +
| 16
 +
| AES -> SHA
 +
|-
 +
| 17
 +
| SHA -> AES
 +
|}
    
== Block transfers ==
 
== Block transfers ==
−
First, a word is always 32 bits. Second, the block transfer specified in REG_NDMACNT is the smallest atom of data that will be transferred in a burst. The bus is monopolized until this block is transferred, without splitting up.
+
First, a word is always 32 bits. Second, the block transfer specified in NDMA_CNT is the smallest atom of data that will be transferred in a burst. The bus is monopolized until this block is transferred, without splitting up.
   −
The next block transfer will happen after the specified time in the REG_NDMABCNT interval timer, until done.
+
The next block transfer will happen after the specified time in the NDMA_BLOCK_CNT interval timer, until done.
    
== Immediate mode ==
 
== Immediate mode ==
−
Transfers the words specified in REG_NDMAWCNT immediately following block transfer rules. REG_NDMATCNT and repeating mode are ignored.
+
Transfers the words specified in NDMA_WRITE_CNT immediately following block transfer rules. NDMA_TRANSFER_CNT and repeating mode are ignored.
    
== Repeating mode ==
 
== Repeating mode ==
−
Transfers the words specified in REG_NDMAWCNT following the startup mode event. REG_DMATCNT is ignored.
+
Transfers the words specified in NDMA_WRITE_CNT following the startup mode event. NDMA_TRANSFER_CNT is ignored.
    
== No immediate and no repeating mode ==
 
== No immediate and no repeating mode ==
−
Transfers the words specified in REG_NDMAWCNT for each startup event, and gets disabled when the total number of words in REG_NDMATCNT are transferred.
+
Transfers the words specified in NDMA_WRITE_CNT for each startup event, and gets disabled when the total number of words in NDMA_TRANSFER_CNT are transferred.
Retrieved from "https://www.3dbrew.org/wiki/Special:MobileDiff/8590...21618"