From c36e1b5e5e069ce1735dcc2a94aa45ba72ea2441 Mon Sep 17 00:00:00 2001 From: Richard Qin Date: Tue, 9 Dec 2025 00:57:38 +0800 Subject: feat: Initial PMM implementation Introduce the foundational Physical Memory Manager (PMM) and restructure the project for modularity. Implemented basic PMM and related memory management headers (mm/pmm.h, mm/vm.h). Updated Makefile and build process to support new modular structure. --- include/kernel/mm.h | 21 +++++++++++++++++++++ include/kernel/pmm.h | 13 +++++++++++++ 2 files changed, 34 insertions(+) create mode 100644 include/kernel/mm.h create mode 100644 include/kernel/pmm.h (limited to 'include/kernel') diff --git a/include/kernel/mm.h b/include/kernel/mm.h new file mode 100644 index 0000000..0f7c73d --- /dev/null +++ b/include/kernel/mm.h @@ -0,0 +1,21 @@ +#pragma once +#include "common/types.h" + +namespace VM +{ + typedef uint64_t* pagetable_t; + typedef uint64_t pte_t; + typedef uint64_t uint64; + + #define PTE_V (1L << 0) + #define PTE_R (1L << 1) + #define PTE_W (1L << 2) + #define PTE_X (1L << 3) + #define PTE_U (1L << 4) + + #define SATP_SV39 (8L << 60) + #define MAKE_SATP(pagetable) (SATP_SV39 | (((uint64)pagetable) >> 12)) + + void kvminit(); + void kvminithart(); +} \ No newline at end of file diff --git a/include/kernel/pmm.h b/include/kernel/pmm.h new file mode 100644 index 0000000..3328450 --- /dev/null +++ b/include/kernel/pmm.h @@ -0,0 +1,13 @@ +#pragma once +#include "common/types.h" + +#define PHYSTOP (0x80000000 + 128 * 1024 * 1024) +#define PGSIZE 4096 + +namespace PMM{ + void init(); + + void* alloc_page(); + + void free_page(void* pa); +} \ No newline at end of file -- cgit v1.2.3