Memory layout: Difference between revisions
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Created page with "=Physical memory regions = {| class="wikitable" border="1" |- ! Address ! Size ! Description |- | 0x0 | 0x10000 | Bootrom (super secret code/data @ 0x8000) |- | 0x10000 | 0x..." |
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| FCRAM | | FCRAM | ||
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=ARM11 User-land memory regions= | |||
{| class="wikitable" border="1" | |||
|- | |||
! Virtual Address | |||
! Size | |||
! Description | |||
|- | |||
| 0x00100000 / 0x14000000 | |||
| | |||
| The [[ExeFS]]:/.code is usually loaded here, most executables are loaded to 0x00100000. | |||
|- | |||
| 0x08000000 | |||
| | |||
| Heap mapped by [[SVC|ControlMemory]] | |||
|- | |||
| 0x1EC00000 | |||
| | |||
| IO registers, the mapped IO pages which each process can access is specified in the [[NCCH#CXI|CXI]] exheader.(Applications normally don't have access to registers in this range) | |||
|} | |||
All executable pages are read-only, and data pages have the execute-never permission set. Normally .text from the loaded ExeFS:/.code is the only mapped executable memory. Executable [[RO Services|CROs]] can be loaded into memory, once loaded the CRO .text section memory page permissions are changed via [[SVC|ControlProcessMemory]] from RW- to R-X. | |||
Revision as of 07:53, 12 November 2012
Physical memory regions
| Address | Size | Description |
|---|---|---|
| 0x0 | 0x10000 | Bootrom (super secret code/data @ 0x8000) |
| 0x10000 | 0x10000 | Bootrom mirror |
| 0x10000000 | ? | IO memory |
| 0x1FF00000 | 0x80000 | DSP memory |
| 0x1FF80000 | 0x80000 | AXI WRAM |
| 0x20000000 | 0x8000000 | FCRAM |
ARM11 User-land memory regions
| Virtual Address | Size | Description |
|---|---|---|
| 0x00100000 / 0x14000000 | The ExeFS:/.code is usually loaded here, most executables are loaded to 0x00100000. | |
| 0x08000000 | Heap mapped by ControlMemory | |
| 0x1EC00000 | IO registers, the mapped IO pages which each process can access is specified in the CXI exheader.(Applications normally don't have access to registers in this range) |
All executable pages are read-only, and data pages have the execute-never permission set. Normally .text from the loaded ExeFS:/.code is the only mapped executable memory. Executable CROs can be loaded into memory, once loaded the CRO .text section memory page permissions are changed via ControlProcessMemory from RW- to R-X.