Secure Monitor: Difference between revisions

Line 225:

| 11 || [[#IsDebugMode]]

|-

| 12 || [[#~~UnitConfiguration~~]]

| 12 || [[#KernelFlags]]

|-

| 13 || [[#IsChargerHiZModeEnabled]]

Line 381:

The value of this field is loaded from [[BootConfig]] unsigned-config+0x10 u8 bit1.

==== ~~UnitConfiguration~~ ====

==== KernelFlags ====

Kernel reads this when setting up memory-related code. If bit0 is set, it will memset various allocated memory-regions with 0x58, 0x59, 0x5A ('X', 'Y', 'Z') instead of zero. This allows Nintendo devs to find uninitialized memory bugs. If bit17-16 is 0b01, the kernel assumes 6GB of DRAM instead of 4GB.

Kernel reads this when setting up memory-related code.

~~bit1 and bit2~~ are boolean ~~values~~.

Bit 0 is a boolean determining whether kernel should it will memset various allocated memory-regions with 0x58, 0x59, 0x5A ('X', 'Y', 'Z') instead of zero. This allows Nintendo devs to find uninitialized memory bugs.

~~If bit15~~-8 is ~~zero~~, ~~kernel will loop forever without calling smcPanic~~, ~~nonzero smcPanics with 0xf00 and then loops~~.

Bit 1 is a boolean determining whether kernel should forcefully enable usermode exception handlers (when false, only data aborts/prefetch aborts that occur when the faulting address is in a readable region with MemoryType_CodeStatic will trigger usermode exception handlers).

Bit 2 is a boolean determining whether kernel should enable usermode access to the Performance Monitors (whether PMUSERENR_EL0 should be 1 or 0).

Bits 8-15 are a boolean determining whether kernel should call smcPanic on error instead of infinite-looping.

Bits 16-17 determine how much memory is available. 00/03 = 4 GB, 01 = 6 GB, 02 = 8 GB.

==== IsChargerHiZModeEnabled ====

@@ Line 225: / Line 225: @@
 | 11 || [[#IsDebugMode]]
 |-
-| 12 || [[#UnitConfiguration]]
+| 12 || [[#KernelFlags]]
 |-
 | 13 || [[#IsChargerHiZModeEnabled]]
@@ Line 381: / Line 381: @@
 The value of this field is loaded from [[BootConfig]] unsigned-config+0x10 u8 bit1.
-==== UnitConfiguration ====
+==== KernelFlags ====
-Kernel reads this when setting up memory-related code. If bit0 is set, it will memset various allocated memory-regions with 0x58, 0x59, 0x5A ('X', 'Y', 'Z') instead of zero. This allows Nintendo devs to find uninitialized memory bugs. If bit17-16 is 0b01, the kernel assumes 6GB of DRAM instead of 4GB.
+Kernel reads this when setting up memory-related code.
-bit1 and bit2 are boolean values.
+Bit 0 is a boolean determining whether kernel should it will memset various allocated memory-regions with 0x58, 0x59, 0x5A ('X', 'Y', 'Z') instead of zero. This allows Nintendo devs to find uninitialized memory bugs.
-If bit15-8 is zero, kernel will loop forever without calling smcPanic, nonzero smcPanics with 0xf00 and then loops.
+Bit 1 is a boolean determining whether kernel should forcefully enable usermode exception handlers (when false, only data aborts/prefetch aborts that occur when the faulting address is in a readable region with MemoryType_CodeStatic will trigger usermode exception handlers).
+Bit 2 is a boolean determining whether kernel should enable usermode access to the Performance Monitors (whether PMUSERENR_EL0 should be 1 or 0).
+Bits 8-15 are a boolean determining whether kernel should call smcPanic on error instead of infinite-looping.
+Bits 16-17 determine how much memory is available. 00/03 = 4 GB, 01 = 6 GB, 02 = 8 GB.
 ==== IsChargerHiZModeEnabled ====