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memorymap.txt
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memorymap.txt
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MEMORY MAP
Circle on Raspberry Pi 1
------------------------------------------------------------------------------
Base Size Contents Remarks
------------------------------------------------------------------------------
00000000 32 Bytes Exception vector table
...
00000100 variable ATAGS unused
...
00008000 max. 2 MByte Kernel image
.init startup code
.text
.rodata
.init_array static constructors
.ARM.exidx C++ exception index
.eh_frame unused
.data
.bss
...
00208000 128 KByte Kernel stack
00228000 32 KByte Abort exception stack
00230000 32 KByte IRQ exception stack
00238000 32 KByte FIQ exception stack
00240000 16 KByte Page table 1
...
00400000 1 MByte Coherent region for property mailbox, VCHIQ
00500000 variable Heap allocator malloc()
???????? 4 MByte Page allocator palloc()
???????? variable GPU memory
20000000 Peripherals
...
------------------------------------------------------------------------------
Circle on Raspberry Pi 2 and 3 (AArch32)
------------------------------------------------------------------------------
Base Size Contents Remarks
------------------------------------------------------------------------------
00000000 256 Bytes ARM stub Core 1-3 spin here
00000000 32 Bytes Exception vector table
00000100 variable ATAGS unused
...
00008000 max. 2 MByte Kernel image
.init startup code
.text
.rodata
.init_array static constructors
.ARM.exidx C++ exception index
.eh_frame unused
.data
.bss
...
Kernel stacks
00208000 128 KByte for Core 0
00228000 128 KByte for Core 1 may be unused
00248000 128 KByte for Core 2 may be unused
00268000 128 KByte for Core 3 may be unused
Abort exception stacks
00288000 32 KByte for Core 0
00290000 32 KByte for Core 1 may be unused
00298000 32 KByte for Core 2 may be unused
002A0000 32 KByte for Core 3 may be unused
IRQ exception stacks
002A8000 32 KByte for Core 0
002B0000 32 KByte for Core 1 may be unused
002B8000 32 KByte for Core 2 may be unused
002C0000 32 KByte for Core 3 may be unused
FIQ exception stacks
002C8000 32 KByte for Core 0
002D0000 32 KByte for Core 1 may be unused
002D8000 32 KByte for Core 2 may be unused
002E0000 32 KByte for Core 3 may be unused
002E8000 16 KByte Page table 1
...
00400000 1 MByte Coherent region for property mailbox, VCHIQ
00500000 variable Heap allocator malloc()
???????? 4 MByte Page allocator palloc()
1F000000 variable rpi_stub if used for debugging
...
???????? variable GPU memory
3F000000 16 MByte Peripherals
40000000 Local peripherals
...
------------------------------------------------------------------------------
Circle on Raspberry Pi 3 (AArch64)
------------------------------------------------------------------------------
Base Size Contents Remarks
------------------------------------------------------------------------------
00000000 256 Bytes ARM stub Core 1-3 spin here
00000100 variable ATAGS unused
...
00080000 max. 2 MByte Kernel image
.init startup code
.text
.rodata
.init_array static constructors
.ARM.exidx unused
.eh_frame C++ exception frames
.data
.bss
...
Kernel stacks
00280000 128 KByte for Core 0
002A0000 128 KByte for Core 1 may be unused
002C0000 128 KByte for Core 2 may be unused
002E0000 128 KByte for Core 3 may be unused
Exception stacks
00300000 32 KByte for Core 0
00308000 32 KByte for Core 1 may be unused
00310000 32 KByte for Core 2 may be unused
00318000 32 KByte for Core 3 may be unused
00500000 1 MByte Coherent region for property mailbox, VCHIQ
00600000 variable Heap allocator malloc()
???????? 16 MByte Page allocator palloc()
???????? variable GPU memory
3F000000 16 MByte Peripherals
40000000 Local peripherals
...
------------------------------------------------------------------------------
Circle on Raspberry Pi 4 (AArch32, LPAE)
------------------------------------------------------------------------------
Base Size Contents Remarks
------------------------------------------------------------------------------
00000000 256 Bytes ARM stub Core 1-3 spin here
00000000 32 Bytes Exception vector table
00000100 variable ATAGS unused
...
00008000 max. 2 MByte Kernel image
.init startup code
.text
.rodata
.init_array static constructors
.ARM.exidx C++ exception index
.eh_frame unused
.data
.bss
...
Kernel stacks
00208000 128 KByte for Core 0
00228000 128 KByte for Core 1 may be unused
00248000 128 KByte for Core 2 may be unused
00268000 128 KByte for Core 3 may be unused
Abort exception stacks
00288000 32 KByte for Core 0
00290000 32 KByte for Core 1 may be unused
00298000 32 KByte for Core 2 may be unused
002A0000 32 KByte for Core 3 may be unused
IRQ exception stacks
002A8000 32 KByte for Core 0
002B0000 32 KByte for Core 1 may be unused
002B8000 32 KByte for Core 2 may be unused
002C0000 32 KByte for Core 3 may be unused
FIQ exception stacks
002C8000 32 KByte for Core 0
002D0000 32 KByte for Core 1 may be unused
002D8000 32 KByte for Core 2 may be unused
002E0000 32 KByte for Core 3 may be unused
002E8000 16 KByte Page table 1
...
00400000 4 MByte Coherent region for property mailbox, VCHIQ, xHCI
00800000 variable Heap allocator "new" and malloc()
???????? 4 MByte Page allocator palloc()
???????? variable GPU memory
40000000 variable High heap allocator unused above 0xC0000000
...
FA000000 2 MByte xHCI controller mapped from 0x600000000
...
FC000000 64 MByte Peripherals
------------------------------------------------------------------------------
Circle on Raspberry Pi 4 (AArch64)
------------------------------------------------------------------------------
Base Size Contents Remarks
------------------------------------------------------------------------------
00000000 256 Bytes ARM stub Core 1-3 spin here
00000100 variable ATAGS unused
...
0006F000 4 KByte EL3 stack
00070000 2 KByte Exception vector table EL3
...
00080000 max. 2 MByte Kernel image
.init startup code
.text
.rodata
.init_array static constructors
.ARM.exidx unused
.eh_frame C++ exception frames
.data
.bss
...
Kernel stacks
00280000 128 KByte for Core 0
002A0000 128 KByte for Core 1 may be unused
002C0000 128 KByte for Core 2 may be unused
002E0000 128 KByte for Core 3 may be unused
Exception stacks
00300000 32 KByte for Core 0
00308000 32 KByte for Core 1 may be unused
00310000 32 KByte for Core 2 may be unused
00318000 32 KByte for Core 3 may be unused
00500000 4 MByte Coherent region for property mailbox, VCHIQ, xHCI
00900000 variable Heap allocator "new" and malloc()
???????? 16 MByte Page allocator palloc()
???????? variable GPU memory
40000000 variable High heap allocator unused above 0xC0000000
...
FC000000 64 MByte Peripherals
...
600000000 64 MByte xHCI controller
...
------------------------------------------------------------------------------