Memory layout: Difference between revisions

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Line 33:

| 0x17E10000

| 0x00001000

| L2C-310 Level 2 Cache Controller (2MB)

| L2C-310 r3p3 Level 2 Cache Controller (2MB)

|-

| style="background: green" | Yes

| 0x18000000

| 0x00600000

| VRAM (divided in two ~~banks,~~ VRAM and ~~VRAMB~~)

| VRAM (divided in two areas VRAM A and B, four banks in total)

|-

| style="background: red" | No

Line 80:

* Writes value <code>0xFFFF</code> to 32-bit register <code>0x17E10000</code>+<code>0x77C</code>.

* Waits for bit 0 in 32-bit register <code>0x17E10000</code>+<code>0x730</code> to become clear.

* Writes value <code>0x0<code> to 32-bit register <code>0x17E10000</code>+<code>0x0</code>.

* Writes value <code>0x0</code> to 32-bit register <code>0x17E10000</code>+<code>0x0</code>.

* Clears bit 0 in 32-bit register <code>0x17E10000</code>+<code>0x100</code>.

=== <code>0x1F000000</code> ([[New 3DS]] only) ===

This area is used by [[QTM Services]],starting at offset <code>0x200000</code>, size <code>0x180000</code>. This area is not accessible to the GPU on the old 3DS. The old 3DS and New 3DS GSP module has <code>vaddr->physaddr</code> conversion code for this entire region. On the New 3DS, only the first <code>0x200000</code> bytes (half of this memory) are accessible to the GPU.

This area is used by [[QTM Services]] and Kernel11,starting at offset <code>0x200000</code>, size <code>0x180000</code>. This area is not accessible to the GPU on the old 3DS. The old 3DS and New 3DS GSP module has <code>vaddr->physaddr</code> conversion code for this entire region. On the New 3DS, only the first <code>0x200000</code> bytes (half of this memory) are accessible to the GPU.

== ARM9 ==

Line 581:

| 0xB90

| Uninitialized memory.

0x01FFFC00 ~~size~~ 0x100~~-bytes starting~~ with [[9.5.0-22|9.5.0-X]] is the FIRM header used during FIRM-launching.

|-

| 0x01FFFC00

|

| 0x7C00

| 0x100

| Starting with [[9.5.0-22|9.5.0-X]] is the FIRM header used during FIRM-launching.

|}

Line 633:

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FCRAM is partitioned into three regions of memory (APPLICATION, SYSTEM, and BASE). Most applications can only allocate memory from one of these regions (which is encoded in the [[NCCH/Extended_Header#ARM11_Kernel_Flags|process kernel flags]]). There is a fixed set of possible size of each memory region, determined by the APPMEMTYPE value in [[Configuration_Memory#APPMEMTYPE|configuration memory]] (which in turn is set up according to the [[FIRM#FIRM_Launch_Parameters|firmware launch parameters]]).

Support for APPMEMTYPEs 6 and 7 was implemented in [[NS]] with [[8.0.0-18]]. These configurations are only supported in the [[New_3DS]] ARM11-kernel, and are in fact the only ones supported there at all. Applications only get access to the larger memory regions when this is specified in their [[NCCH/Extended Header#New3DS System Mode|extended header]].

Support for APPMEMTYPEs 6 and 7 (and 8?) was implemented in [[NS]] with [[8.0.0-18]]. These configurations are only supported in the [[New_3DS]] ARM11-kernel, and are in fact the only ones supported there at all. Applications only get access to the larger memory regions when this is specified in their [[NCCH/Extended Header#New3DS System Mode|extended header]].

{| class="wikitable" border="1"

Line 684:

Line 689:

| 0x01400000

|-

| 6 (~~This~~ is the default on New3DS. With [[New_3DS]] kernel this is the type used when the value is ~~not~~ 7)

| 6 and 8 (6 is the default on New3DS. With [[New_3DS]] kernel this is the type used when the value is neither 7 nor 8)

| 0x0

| 0x07C00000(124MB)

@@ Line 33: / Line 33: @@
 | 0x17E10000
 | 0x00001000
-| L2C-310 Level 2 Cache Controller (2MB)
+| L2C-310 r3p3 Level 2 Cache Controller (2MB)
 |-
 | style="background: green" | Yes
 | 0x18000000
 | 0x00600000
-| VRAM (divided in two banks, VRAM and VRAMB)
+| VRAM (divided in two areas VRAM A and B, four banks in total)
 |-
 | style="background: red" | No
@@ Line 80: / Line 80: @@
 * Writes value <code>0xFFFF</code> to 32-bit register <code>0x17E10000</code>+<code>0x77C</code>.
 * Waits for bit 0 in 32-bit register <code>0x17E10000</code>+<code>0x730</code> to become clear.
-* Writes value <code>0x0<code> to 32-bit register <code>0x17E10000</code>+<code>0x0</code>.
+* Writes value <code>0x0</code> to 32-bit register <code>0x17E10000</code>+<code>0x0</code>.
 * Clears bit 0 in 32-bit register <code>0x17E10000</code>+<code>0x100</code>.
 === <code>0x1F000000</code> ([[New 3DS]] only) ===
-This area is used by [[QTM Services]],starting at offset <code>0x200000</code>, size <code>0x180000</code>. This area is not accessible to the GPU on the old 3DS. The old 3DS and New 3DS GSP module has <code>vaddr-&gt;physaddr</code> conversion code for this entire region. On the New 3DS, only the first <code>0x200000</code> bytes (half of this memory) are accessible to the GPU.
+This area is used by [[QTM Services]] and Kernel11,starting at offset <code>0x200000</code>, size <code>0x180000</code>. This area is not accessible to the GPU on the old 3DS. The old 3DS and New 3DS GSP module has <code>vaddr-&gt;physaddr</code> conversion code for this entire region. On the New 3DS, only the first <code>0x200000</code> bytes (half of this memory) are accessible to the GPU.
 == ARM9 ==
@@ Line 581: / Line 581: @@
 | 0xB90
 | Uninitialized memory.
-x01FFFC00 size 0x100-bytes starting with [[9.5.0-22|9.5.0-X]] is the FIRM header used during FIRM-launching.
+|-
+| 0x01FFFC00
+|
+| 0x7C00
+| 0x100
+| Starting with [[9.5.0-22|9.5.0-X]] is the FIRM header used during FIRM-launching.
 |}
@@ Line 633: / Line 638: @@
 FCRAM is partitioned into three regions of memory (APPLICATION, SYSTEM, and BASE). Most applications can only allocate memory from one of these regions (which is encoded in the [[NCCH/Extended_Header#ARM11_Kernel_Flags|process kernel flags]]). There is a fixed set of possible size of each memory region, determined by the APPMEMTYPE value in [[Configuration_Memory#APPMEMTYPE|configuration memory]] (which in turn is set up according to the [[FIRM#FIRM_Launch_Parameters|firmware launch parameters]]).
-Support for APPMEMTYPEs 6 and 7 was implemented in [[NS]] with [[8.0.0-18]]. These configurations are only supported in the [[New_3DS]] ARM11-kernel, and are in fact the only ones supported there at all. Applications only get access to the larger memory regions when this is specified in their [[NCCH/Extended Header#New3DS System Mode|extended header]].
+Support for APPMEMTYPEs 6 and 7 (and 8?) was implemented in [[NS]] with [[8.0.0-18]]. These configurations are only supported in the [[New_3DS]] ARM11-kernel, and are in fact the only ones supported there at all. Applications only get access to the larger memory regions when this is specified in their [[NCCH/Extended Header#New3DS System Mode|extended header]].
 {| class="wikitable" border="1"
@@ Line 684: / Line 689: @@
 | 0x01400000
 |-
-| 6 (This is the default on New3DS. With [[New_3DS]] kernel this is the type used when the value is not 7)
+| 6 and 8 (6 is the default on New3DS. With [[New_3DS]] kernel this is the type used when the value is neither 7 nor 8)
 | 0x0
 | 0x07C00000(124MB)