Memory Layout for Raspberry Pi

memory_layout.md

• User/Kernel split
  • 3 GB user, 1 GB kernel
• User split
  • 1 MB unmapped for illegal access exceptions
  • .text, .rodata, .data, heap and stack
  • Heap is right after .data
  • Stack is at the end of the available user RAM
  • Heap and stack grow towards each other
• Kernel split
  • 512 MB VideoCore RAM (reserved address space, actual RAM may be less)
  • 64 MB memory-mapped devices
  • 447 MB Kernel code (reserved address space, actual RAM may be less)
  • 1 MB TLB, mailbox RAM, kernel RAM, interrupt vectors, kernel stacks

Begin	Size	Flags	Description
0x00000000	1 MB	---	---
0x00100000	.text	R-X	User .text
0x00100000 + .text	.rodata	R--	User .rodata
0x00100000 + .text + .rodata	.data	RW-	User .data
0x00100000 + .text + .rodata + .data	All available	RW-	User heap and stack
0x00100000 + .text + .rodata +.data + heap + stack		---	---
0xc0000000	512 MB	RW-	VideoCore IV (max)
0xe0000000	32 MB	RW-	BCM Peripherals, device, non-cacheable
0xe2000000	32 MB	RW-	Local peripherals, device, non-cacheable
0xe4000000	447 MB	R-X	Kernel code (max)
0xfff00000	64 KB	RW-	TLB
0xfff10000	64 KB	RW-	Mailbox RAM, non-cacheable
0xfff20000	832 KB	RW-	Kernel RAM
0xffff0000	64 B	RW-	Interrupt vectors
0xffff0040	65472 B	RW-	Abort, undefined, IRQ, and FIQ stacks

for which raspberry pi is this, not all of them have the same memory layout

It's for a 3B+, but I've unfortunately I had to abandon the project because of lack of time. Thanks for the interest though!