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Atmosphere/docs/components/detail/exosphere_memory_layout.txt

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exosphere, storage requirements:
Nonvolatile memory:
0xE000
Volatile memory: 0x2000
Physical Address Space:
-0x7C010000-0x7C012000 - boot code/volatile memory
-0x7C012000-0x7C01E000 - program region
-0x7C01E000-0x7C01F000 - global data/context
-0x7C01F000-0x7C020000 - L2/L3 page table
-0x7C020000-0x7C040000 - Mariko-only program region
-0x7C040000-0x7C048000 - Mariko-only program stack
-0x7C048000-0x7C050000 - Reserved Mariko TZRAM (SE context carveouts, etc)
Virtual Address Space:
L1: 0x40 bytes.
L1 Entries:
-0 (0x000000000-0x040000000): Empty
-1 (0x040000000-0x080000000): Identity Mapping/Empty
-2 (0x080000000-0x0C0000000): DRAM Mapping/Empty
-3 (0x0C0000000-0x100000000): DRAM Mapping/Empty
-4 (0x100000000-0x140000000): Empty
-5 (0x140000000-0x180000000): Empty
-6 (0x180000000-0x1C0000000): Empty
-7 (0x1C0000000-0x200000000): Virtual Region
L2 Page and L3 page are both0x7C01F000
L2 Entries:
-0x040000000 (Identity IRAM Table)
- Entry Used: 0x000
-0x07C000000 (Identity TZRAM Table)
- Entry Used: 0x1E0
-0x1F0000000 (Virtual Region Table)
- Entry Used: 0x180
L3 Entries:
- Identity TZRAM mapping (0x7C010000-0x7C020000)
- Entry Used: 0x010-0x01F
- Identity IRAM mapping (0x40020000-0x40040000)
- Entry Used: 0x020-0x03F
- Virtual Device region (0x1F0040000-0x1F0080000)
- Entry Used: 0x040-0x07F
- Read Only TZRAM Alias (0x1F00A0000-0x1F00B0000)
- Entry Used: 0x0A0-0x0AF
- Program region (0x1F00C0000-0x1F00CC000)
- Entry Used: 0x0C0-0x0CB
- Mariko Program region (0x1F00D0000-0x1F00F0000)
- Entry Used: 0x0D0-0x0EF
- Mariko Program stack (0x1F00F4000-0x1F00FC000)
- Entry Used: 0x0F4-0x0FB
- Secure DRAM Storage (0x1F0100000-0x1F0110000)
- Entry Used: 0x100-0x10F
- Debug DRAM Storage (0x1F0110000-0x1F0114000)
- Entry Used: 0x110-0x113
- SC7 IRAM Work Space (0x1F0120000-0x1F0130000)
- Entry Used: 0x120-0x12F
- SC7 IRAM Firmware (0x1F0140000-0x1F0141000)
- Entry Used: 0x140-0x140
- Debug Code (0x1F0150000-0x1F0154000)
- Entry Used: 0x150-0x153
- Reserved For Debug (0x1F0160000-0x1F0170000)
- Entry Used: 0x160-0x16F
- Boot Code (0x1F01C0000-0x1F01C2000)
- Entry Used: 0x1C0-0x1C1
- AMS IRAM Page (0x1F01F2000-0x1F01F2000)
- Entry Used: 0x1F2-0x1F2
- AMS User Page (0x1F01F4000-0x1F01F4000)
- Entry Used: 0x1F4-0x1F4
- SMC User Page (0x1F01F6000-0x1F01F6000)
- Entry Used: 0x1F6-0x1F6
- Volatile (Data) (0x1F01F8000-0x1F01F9000)
- Entry Used: 0x1F8-0x1F8
- Volatile (Stacks) (0x1F01FA000-0x1F01FB000)
- Entry Used: 0x1FA-0x1FA
- Global Data (0x1F01FC000-0x1F01FD000)
NV Global Data needs:
Exosphere + Emummc Config (<=0x200)
Boot Config[0x400]
RSA Context(0x100)
Old Device Keys[0x20][0x10];
Old Master Keys[0x20][0x10];
Imported Rsa Keys[4][0x200];
CPU Ctx[4][0x100];
Total: 0x1700
Global Data Page (accessible via X18):
0x000-0x200: Exosphere Config
0x200-0x400: Emummc Config
0x400-0x800: Sealed AES Keys
0x800-0xC00: Boot Config
0xC00-0xFFF: CPU contexts. Can be replaced, but this fits exactly so minimizes program space waste.
Volatile Global Data needs:
Random Cache 0x400 bytes