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memory #7

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xamidev merged 7 commits from memory into main 2026-01-04 09:28:00 +01:00
Conversation 1 Commits 7 Files Changed 20 +686 -17
xamidev commented 2026-01-04 09:27:51 +01:00
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Got a memory map, HHDM offset from the bootloader. Then implemented a small PMM that can alloc/free a single frame at a time with a freelist. (thanks to @wux.efi on the OSDev discord)
We also got back control of paging, removed Limine's page tables and set up ours; the kernel & framebuffer are remapped within our structures.
(I believe we do not have access to ACPI anymore though but we can still modify the code to remap those sections aswell once we need them)
Also implemented a tiny (16MB, hardcoded) kernel heap with kmalloc/kfree.

Got a memory map, HHDM offset from the bootloader. Then implemented a small PMM that can alloc/free a single frame at a time with a freelist. (thanks to @wux.efi on the OSDev discord) We also got back control of paging, removed Limine's page tables and set up ours; the kernel & framebuffer are remapped within our structures. (I believe we do not have access to ACPI anymore though but we can still modify the code to remap those sections aswell once we need them) Also implemented a tiny (16MB, hardcoded) kernel heap with kmalloc/kfree.
xamidev added 7 commits 2026-01-04 09:27:51 +01:00
First steps: getting memory map from Limine request and looking at it 8f5e2eae3e
PMM: init (find biggest usable region) 05a862e97a
PMM: init with freelist 075058a958
Cleaner include paths + some paging definitions bb5fb9db33
Paging: mapped kernel, fb, early-mem, HHDM c065df6ff3
Small kernel heap for VMM internals, kmalloc/kfree e18b73c8a0
Remove useless code/comments 923758a4ea
xamidev merged commit be1be41a64 into main 2026-01-04 09:28:00 +01:00
xamidev commented 2026-01-04 09:28:46 +01:00
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(The VMM is not implemented yet but we will do that later)

(The VMM is not implemented yet but we will do that later)
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Reference: xamidev/pepperOS#7
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