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− | == 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. |