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CONFIG9 Registers (edit)

Revision as of 20:20, 25 May 2017

4,747 bytes added ,  20:20, 25 May 2017
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Line 1: Line 1: −
== Registers ==
+
= Registers =
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
−
!  NAME
+
!  Old3DS
−
!  PHYSICAL ADDRESS
+
!  Name
−
!  WIDTH
+
!  Address
 +
!  Width
 +
!  Used by
 
|-
 
|-
−
| REG_CARDCONF
+
| style="background: green" | Yes
 +
| [[#CFG9_SYSPROT9|CFG9_SYSPROT9]]
 +
| 0x10000000
 +
| 1
 +
| Boot9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_SYSPROT11|CFG9_SYSPROT11]]
 +
| 0x10000001
 +
| 1
 +
| Boot9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_RST11|CFG9_RST11]]
 +
| 0x10000002
 +
| 1
 +
| Boot9
 +
|-
 +
| style="background: green" | Yes
 +
| CFG9_DEBUGCTL
 +
| 0x10000004
 +
| 4
 +
|
 +
|-
 +
| style="background: green" | Yes
 +
| ?
 +
| 0x10000008
 +
| 1
 +
| Boot9, Process9, TwlProcess9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_CARDCTL|CFG9_CARDCTL]]
 
| 0x1000000C
 
| 0x1000000C
 
| 2
 
| 2
 +
| Process9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_CARDSTATUS|CFG9_CARDSTATUS]]
 +
| 0x10000010
 +
| 1
 +
| Process9
 +
|-
 +
| style="background: green" | Yes
 +
| CFG9_CARDCYCLES0
 +
| 0x10000012
 +
| 2
 +
| Boot9, Process9
 +
|-
 +
| style="background: green" | Yes
 +
| CFG9_CARDCYCLES1
 +
| 0x10000014
 +
| 2
 +
| Boot9, Process9
 +
|-
 +
| style="background: green" | Yes
 +
| ?
 +
| 0x10000020
 +
| 2
 +
|
 +
|-
 +
| style="background: green" | Yes
 +
| ?
 +
| 0x10000100
 +
| 2
 +
|
 +
|-
 +
| style="background: red" | No
 +
| [[#CFG9_EXTMEMCNT9|CFG9_EXTMEMCNT9]]
 +
| 0x10000200
 +
| 1
 +
| NewKernel9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_MPCORECFG|CFG9_MPCORECFG]]
 +
| 0x10000FFC
 +
| 4
 +
|
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_BOOTENV|CFG9_BOOTENV]]
 +
| 0x10010000
 +
| 4
 +
|
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_UNITINFO|CFG9_UNITINFO]]
 +
| 0x10010010
 +
| 1
 +
| Process9
 +
|-
 +
| style="background: green" | Yes
 +
| [[#CFG9_TWLUNITINFO|CFG9_TWLUNITINFO]]
 +
| 0x10010014
 +
| 1
 +
| Process9
 +
|}
 +
 +
== CFG9_SYSPROT9 ==
 +
CFG9_SYSPROT9 is used to permanently disable certain security-sensitive ARM9 memory areas until the next hard reset.
 +
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 +
|-
 +
| 0
 +
| Disables ARM9 [[Memory_layout|bootrom]](+0x8000) when set to 1, and enables access to [[Memory_layout|FCRAM]]. Cannot be cleared to 0 once set to 1.
 +
| Boot9
 +
|-
 +
| 1
 +
| Disables [[OTP_Registers|OTP area]] when set to 1. Cannot be cleared to 0 once set to 1.
 +
| NewKernel9Loader, Process9
 +
|-
 +
| 31-2
 +
| Not used
 +
|
 +
|}
 +
 +
On Old 3DS, NATIVE_FIRM reads CFG9_SYSPROT9 to know whether it has previously initialized the TWL console-unique keys using the OTP data.  After setting the TWL console-unique keys, NATIVE_FIRM sets CFG9_SYSPROT9 bit 1 to disable the OTP area.  In subsequent FIRM launches prior to the next reset, NATIVE_FIRM will see that the OTP area is disabled, and skip this step.
 +
 +
On New 3DS, the above is instead done by the [[FIRM#New_3DS_FIRM|Kernel9 loader]].  In addition to using the OTP data for initializing the TWL console-unique keys, the Kernel9 loader will generate the decryption key for NATIVE_FIRM.  The final keyslot for NATIVE_FIRM is preserved, so that at a non-reset FIRM launch, the keyslot can be reused, since the OTP would then be inaccessible.
 +
 +
== CFG9_SYSPROT11 ==
 +
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 +
|-
 +
| 0
 +
| Disables ARM11 [[Memory_layout|bootrom]](+0x8000) when set to 1, and enables access to [[Memory_layout|FCRAM]]. Cannot be cleared to 0 once set to 1.
 +
| Boot9
 +
|-
 +
| 31-1
 +
| Not used
 +
|
 
|}
 
|}
    +
== CFG9_RST11 ==
   −
== REG_CARDCONF ==
   
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
!  Bit
 
!  Bit
 
!  Description
 
!  Description
 +
!  Used by
 +
|-
 +
| 0
 +
| Presumably takes ARM11 out of reset. Cannot be set to 1 once it has been cleared.
 +
| Boot9
 +
|-
 +
| 31-1
 +
| Not used
 +
|
 +
|}
 +
 +
== 0x10000008 ==
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 +
|-
 +
| 1-0
 +
| ?
 +
|
 +
|-
 +
| 3-2
 +
| AES related? Value 3 written after write to AES_CTL.
 +
| Boot9, Process9, TwlProcess9
 +
|-
 +
| 31-4
 +
| Reserved
 +
|
 +
|}
 +
 +
== CFG9_CARDCTL ==
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 
|-
 
|-
 
| 1-0
 
| 1-0
−
| Gamecard active controller select (0=NTRCARD, 1=?, 2=CTRCARD1, 3=CTRCARD2)
+
| Gamecard active controller select (0=NTRCARD, 1=?, 2=CTRCARD0, 3=CTRCARD1)
 +
| Process9
 
|-
 
|-
 
| 8
 
| 8
−
| ?
+
| Enable gamecard eject IRQ, maybe?
 +
| Process9
 
|}
 
|}
    
Depending on the gamecard controller that has been selected, one of the following gamecard registers will become active:
 
Depending on the gamecard controller that has been selected, one of the following gamecard registers will become active:
 
* Selecting NTRCARD will activate the register space at [[NTRCARD|0x10164000]].
 
* Selecting NTRCARD will activate the register space at [[NTRCARD|0x10164000]].
−
* Selecting CTRCARD1 will activate the register space at [[CTRCARD|0x10004000]].
+
* Selecting CTRCARD0 will activate the register space at [[CTRCARD|0x10004000]].
−
* Selecting CTRCARD2 will activate the register space at [[CTRCARD|0x10005000]].
+
* Selecting CTRCARD1 will activate the register space at [[CTRCARD|0x10005000]].
 +
 
 +
== CFG9_CARDSTATUS ==
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 +
|-
 +
| 0
 +
| Cartridge-slot empty (0=inserted, 1=empty)
 +
| Process9
 +
|-
 +
| 3-2
 +
| ?
 +
| Process9
 +
|}
 +
 
 +
== CFG9_EXTMEMCNT9 ==
 +
This register is New3DS-only.
 +
 
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
!  Used by
 +
|-
 +
| 0
 +
| Hide extended ARM9 memory (0=hidden, 1=shown)
 +
| Kernel9 (New3DS)
 +
|-
 +
| 31-1
 +
| Reserved
 +
|
 +
|}
 +
 
 +
== CFG9_MPCORECFG ==
 +
Identical to [[PDN#PDN_MPCORE_CFG|PDN_MPCORE_CFG]].
 +
 
 +
== CFG9_BOOTENV ==
 +
This register is used to determine what the previous running FIRM was. Its value is kept following an MCU reboot. Its initial value (on a cold boot) is 0. NATIVE_FIRM [[Development_Services_PXI|sets it to 1]] on shutdown/FIRM launch. [[Legacy_FIRM_PXI|LGY FIRM]] writes value 3 here when launching a TWL title, and writes value 7 when launching an AGB title.
 +
 
 +
NATIVE_FIRM will only launch titles if this is not value 0, and will only save the [[Flash_Filesystem|AGB_FIRM savegame]] to SD if this is value 7.
 +
 
 +
== CFG9_UNITINFO ==
 +
This 8-bit register is value zero for retail, non-zero for dev/debug units.
 +
 
 +
== CFG9_TWLUNITINFO ==
 +
In the console-unique TWL key-init/etc function the ARM9 copies the u8 value from REG_UNITINFO to this register.
 +
 
 +
This is also used by TWL_FIRM Process9.
Motezazer
19

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