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Ayaan Tunio
2025-02-12 09:54:05 -05:00
commit 7118adc514
1108 changed files with 80873 additions and 0 deletions
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37
kernel/include/platform/riscv64/vmm/consts.h Normal file
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#ifndef _KERNEL_PLATFORM_RISCV64_VMM_CONSTS_H
#define _KERNEL_PLATFORM_RISCV64_VMM_CONSTS_H
#include <libkern/types.h>
static inline int vm_page_size()
{
return 0x1000;
}
static inline int vm_page_mask()
{
return 0xfff;
}
#define VMM_LV0_ENTITY_COUNT (512)
#define VMM_LV1_ENTITY_COUNT (512)
#define VMM_LV2_ENTITY_COUNT (512)
#define VMM_LV3_ENTITY_COUNT (512)
#define VMM_PAGE_SIZE (vm_page_size())
#define PAGE_START(vaddr) ((vaddr & (~(uintptr_t)vm_page_mask())))
#define FRAME(addr) (addr / VMM_PAGE_SIZE)
#define PTABLE_LV_TOP (3)
#define PTABLE_LV0_VADDR_OFFSET (12)
#define PTABLE_LV1_VADDR_OFFSET (21)
#define PTABLE_LV2_VADDR_OFFSET (30)
#define PTABLE_LV3_VADDR_OFFSET (39)
#define PTABLE_TOP_KERNEL_OFFSET (VMM_LV3_ENTITY_COUNT / 2)
#define USER_HIGH 0x7fffffffffff
#define KERNEL_BASE 0xffff800000000000
#define KERNEL_PADDR_BASE 0xffffffff00000000 // TODO(x64): up to 4gbs are supported.
#endif // _KERNEL_PLATFORM_RISCV64_VMM_CONSTS_H

30
kernel/include/platform/riscv64/vmm/mmu.h Normal file
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#ifndef _KERNEL_PLATFORM_RISCV64_VMM_MMU_H
#define _KERNEL_PLATFORM_RISCV64_VMM_MMU_H
#include <libkern/types.h>
#include <mem/bits/mmu.h>
// riscv64 uses one table to manage virtual space.
#undef DOUBLE_TABLE_PAGING
typedef uint64_t ptable_entity_t;
typedef uint64_t arch_pf_info_t;
ptable_entity_t vm_mmu_to_arch_flags(mmu_flags_t mmu_flags, ptable_lv_t lv);
mmu_flags_t vm_arch_to_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv);
mmu_pf_info_flags_t vm_arch_parse_pf_info(arch_pf_info_t info);
void vm_ptable_entity_set_default_flags(ptable_entity_t* entity, ptable_lv_t lv);
void vm_ptable_entity_allocated(ptable_entity_t* entity, ptable_lv_t lv);
void vm_ptable_entity_invalidate(ptable_entity_t* entity, ptable_lv_t lv);
void vm_ptable_entity_set_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv, mmu_flags_t mmu_flags);
void vm_ptable_entity_rm_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv, mmu_flags_t mmu_flags);
void vm_ptable_entity_set_frame(ptable_entity_t* entity, ptable_lv_t lv, uintptr_t frame);
uintptr_t vm_ptable_entity_get_frame(ptable_entity_t* entity, ptable_lv_t lv);
ptable_state_t vm_ptable_entity_state(ptable_entity_t* entity, ptable_lv_t lv);
bool vm_ptable_entity_is_present(ptable_entity_t* entity, ptable_lv_t lv);
bool vm_ptable_entity_is_only_allocated(ptable_entity_t* entity, ptable_lv_t lv);
#endif // _KERNEL_PLATFORM_RISCV64_VMM_MMU_H