2024-12-20 22:45:12 +00:00
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# How to make a simple unikernel on RBPi
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File required on Raspberry Pi 5:
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2024-12-30 07:49:09 +00:00
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- bcm2712-rpi-5-b.dtb (https://github.com/raspberrypi/firmware/blob/master/boot/bcm2712-rpi-5-b.dtb)
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- overlays/bcm2712d0.dtbo (https://github.com/raspberrypi/firmware/blob/master/boot/overlays/bcm2712d0.dtbo)
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2024-12-20 22:45:12 +00:00
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- config.txt
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CPU used by Raspberry Pi 5: Cortex-A76
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BCM2712 is the Broadcom chip used by Raspberry Pi 5
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# Memory layout
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2025-01-12 11:30:33 +00:00
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Gilbraltar has a fairly precise memory layout. Here are the different zones
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(heap, stacks, etc.).
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2024-12-20 22:45:12 +00:00
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| Base | Size | Contents | Remarks |
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|------------|----------------------|----------------------------|---------|
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| 00000000 | 32 KByte | ARM Trusted Firmware | BL31 |
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| 0006F000 | 4 KByte | EL3 Stack |
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| 00070000 | 2 KByte | Exception vector table EL3 |
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| ...
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| 00080000 | max. 6 MByte | Kernel image |
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| | .init | startup code |
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| | .text | |
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| | .rodata | |
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| | .data | |
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| | .bss | |
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| ...
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| | Kernel stacks | |
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| 00280000 | 128 KByte | for Core 0 |
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| 002A0000 | 128 KByte | for Core 1 |
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| 002C0000 | 128 KByte | for Core 2 |
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| 002E0000 | 128 KByte | for Core 3 |
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| 00300000 | | End of stacks |
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| | Exception stacks | |
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| 00300000 | 32 KByte | for Core 0 |
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| 00308000 | 32 KByte | for Core 1 |
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| 00310000 | 32 KByte | for Core 2 |
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| 00318000 | 32 KByte | for Core 3 |
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| 00320000 | | End of exception stacks |
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| | IRQ stack | |
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| 00320000 | 32 KByte | for Core 0 |
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| 00328000 | 32 KByte | for Core 1 |
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| 00330000 | 32 KByte | for Core 2 |
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| 00338000 | 32 KByte | for Core 3 |
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| 00340000 | | End of IRQ stacks |
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| | FIQ stack | |
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| 00340000 | 32 KByte | for Core 0 |
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| 00348000 | 32 KByte | for Core 1 |
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| 00350000 | 32 KByte | for Core 2 |
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| 00358000 | 32 KByte | for Core 3 |
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| 00360000 | | End of FIQ stacks |
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| 00500000 | 4 MByte | Coherent region |
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| 00900000 | | |
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| 1b000000 | 16 MByte | Pager |
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| 1c000000 | | |
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| 40000000 | | Heap |
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| ...
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2024-12-23 22:44:47 +00:00
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| 100000000 | 8192 MB | Heap |
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2024-12-20 22:45:12 +00:00
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| 1000000000 | 16 MByte | AXI peripherals |
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