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339 bytes added ,  12:38, 26 May 2016
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Line 205: Line 205:  
|-
 
|-
 
| 1
 
| 1
| Set for debug units
+
| IsJtagConnected
 
|-
 
|-
 
| 2-7
 
| 2-7
Line 214: Line 214:     
== 0x1FF80015 ==
 
== 0x1FF80015 ==
 +
{| class="wikitable" border="1"
 +
!  Value
 +
!  Boot Env
 +
|-
 +
| 0
 +
| Prod
 +
|-
 +
| 1
 +
| Dev
 +
|-
 +
| 2
 +
| Debugger
 +
|-
 +
| 3
 +
| Firm
 +
|}
 +
 
The ARM11 loads this value from 0x1FFFFFF0+1 during startup, which is written by the ARM9 during ARM9<>ARM11 kernel sync.
 
The ARM11 loads this value from 0x1FFFFFF0+1 during startup, which is written by the ARM9 during ARM9<>ARM11 kernel sync.
   −
When this field is zero, bit0 for UNITINFO is set for retail. When this field is non-zero, bit0 for UNITINFO is clear for dev/debug units, and an ARM11 kernel state flag which enables debugging is set. Bit1 means JTAG connected.
+
When this field is zero, bit0 for UNITINFO is set for retail. When this field is non-zero, bit0 for UNITINFO is clear for dev/debug units, and an ARM11 kernel state flag which enables debugging is set. JTAG is only enabled for debugger and "firm" modes (bit1).
    
== 0x1FF80016 ==
 
== 0x1FF80016 ==
 +
{| class="wikitable" border="1"
 +
!  Value
 +
!  Description
 +
|-
 +
| 0
 +
| Cold Boot
 +
|-
 +
| 1
 +
| Reset from CTR mode
 +
|-
 +
| 3
 +
| Reset from TWL mode
 +
|-
 +
| 5
 +
| Reset from NTR mode
 +
|-
 +
| 7
 +
| Reset from AGB mode
 +
|}
 +
 
The ARM11 loads this value from 0x1FFFFFF0+2 during startup, which is written by the ARM9 during ARM9<>ARM11 kernel sync.
 
The ARM11 loads this value from 0x1FFFFFF0+2 during startup, which is written by the ARM9 during ARM9<>ARM11 kernel sync.
  
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