From c9a1266d219a83882735a3a8304f3824e0219cdb Mon Sep 17 00:00:00 2001 From: Benji Dial Date: Mon, 15 Jan 2024 15:44:20 -0500 Subject: redo application paging and system calls, rename mercury to hilbert --- include/hilbert/kernel/paging.hpp | 45 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 include/hilbert/kernel/paging.hpp (limited to 'include/hilbert/kernel/paging.hpp') diff --git a/include/hilbert/kernel/paging.hpp b/include/hilbert/kernel/paging.hpp new file mode 100644 index 0000000..2cf6f5c --- /dev/null +++ b/include/hilbert/kernel/paging.hpp @@ -0,0 +1,45 @@ +#ifndef HILBERT_KERNEL_PAGING_HPP +#define HILBERT_KERNEL_PAGING_HPP + +#include + +//in paging.asm +extern "C" [[noreturn]] void switch_to_kernel_p4(void (*and_then_jump_to)()); + +namespace hilbert::kernel::paging { + + void mark_all_pram_used(); + void mark_all_vram_free(); + + void mark_pram_region_free(uint64_t start_addr, uint64_t end_addr); + void mark_vram_region_used(uint64_t start_addr, uint64_t end_addr); + + uint64_t find_unmapped_vram_region(uint64_t page_count); + + uint64_t encode_pte(uint64_t addr, bool user, bool write, bool execute); + + void init_kernel_page_tables(uint64_t kernel_offset); + + uint64_t take_pram_page(); + + void map_kernel_stacks(); + + void map_kernel_page( + uint64_t paddr, uint64_t vaddr, bool write, bool execute); + + void unmap_kernel_page(uint64_t vaddr); + + //maps writable and not executable + void *map_new_kernel_pages(uint64_t count); + + //maps writable and not executable + void map_new_kernel_page(uint64_t &vaddr_out, uint64_t &paddr_out); + + uint64_t get_used_vram_page_count(); + uint64_t get_free_pram_page_count(); + + extern uint64_t kernel_p4e; + +} + +#endif -- cgit v1.2.3