Difference between revisions of "Memory Management"
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| Line 25: | Line 25: | ||
| − | == | + | == RegionDescriptor == |
Size : 0x10 bytes | Size : 0x10 bytes | ||
| Line 53: | Line 53: | ||
| − | == FCRAM Region | + | == FCRAM Region Descriptor == |
Size : 0x50 bytes | Size : 0x50 bytes | ||
| Line 64: | Line 64: | ||
|- | |- | ||
| 0x0 | | 0x0 | ||
| − | | | + | | RegionDescriptor |
| − | | | + | | RegionDescriptor for app memory |
|- | |- | ||
| 0x10 | | 0x10 | ||
| − | | | + | | RegionDescriptor |
| − | | | + | | RegionDescriptor for sys memory |
|- | |- | ||
| 0x20 | | 0x20 | ||
| − | | | + | | RegionDescriptor |
| − | | | + | | RegionDescriptor for base memory |
|- | |- | ||
| 0x30 | | 0x30 | ||
| u32 | | u32 | ||
| − | | Ptr to start of FCRAM region | + | | Ptr to start of FCRAM region descriptor |
|- | |- | ||
| 0x34 | | 0x34 | ||
| Line 89: | Line 89: | ||
| 0x3C | | 0x3C | ||
| u32 | | u32 | ||
| − | | Base | + | | Base memory start in FCRAM |
|- | |- | ||
| 0x40 | | 0x40 | ||
| u32 | | u32 | ||
| − | | | + | | Count of physical FCRAM used by the kernel, in bytes. (used by [[SVC|svcGetSystemInfo]]) |
|- | |- | ||
| 0x44 | | 0x44 | ||
| Line 106: | Line 106: | ||
| s16 | | s16 | ||
| Error info for thread listed above | | Error info for thread listed above | ||
| + | |- | ||
| + | | 0x4E | ||
| + | | u16 | ||
| + | | Alignment | ||
|} | |} | ||
| + | |||
| + | |||
| + | == Kernel Region Descriptor == | ||
Revision as of 01:00, 4 February 2016
How The Kernel Allocates And Tracks Memory
MemoryBlockHeader
Size : 0xC bytes
| Offset | Type | Description |
|---|---|---|
| 0x0 | u32 | Size in pages |
| 0x4 | MemoryBlockHeader* | Next |
| 0x8 | MemoryBlockHeader* | Prev |
RegionDescriptor
Size : 0x10 bytes
| Offset | Type | Description |
|---|---|---|
| 0x0 | MemoryBlockHeader* | |
| 0x4 | MemoryBlockHeader* | |
| 0x8 | u32 | Region start |
| 0xC | u32 | Region size |
FCRAM Region Descriptor
Size : 0x50 bytes
| Offset | Type | Description |
|---|---|---|
| 0x0 | RegionDescriptor | RegionDescriptor for app memory |
| 0x10 | RegionDescriptor | RegionDescriptor for sys memory |
| 0x20 | RegionDescriptor | RegionDescriptor for base memory |
| 0x30 | u32 | Ptr to start of FCRAM region descriptor |
| 0x34 | u32 | FCRAM start |
| 0x38 | u32 | FCRAM size in pages |
| 0x3C | u32 | Base memory start in FCRAM |
| 0x40 | u32 | Count of physical FCRAM used by the kernel, in bytes. (used by svcGetSystemInfo) |
| 0x44 | u32 | ? |
| 0x48 | KThread* | Thread operating on region data |
| 0x4C | s16 | Error info for thread listed above |
| 0x4E | u16 | Alignment |