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#ifndef _VM_H
#define _VM_H
#include "encoding.h"
#include <stdint.h>
#define MEGAPAGE_SIZE ((uintptr_t)(RISCV_PGSIZE << RISCV_PGLEVEL_BITS))
#ifdef __riscv64
# define VM_CHOICE VM_SV39
# define VA_BITS 39
# define GIGAPAGE_SIZE (MEGAPAGE_SIZE << RISCV_PGLEVEL_BITS)
#else
# define VM_CHOICE VM_SV32
# define VA_BITS 32
#endif
typedef uintptr_t pte_t;
extern pte_t* root_page_table;
static inline void flush_tlb()
{
asm volatile("sfence.vm");
}
static inline pte_t pte_create(uintptr_t ppn, int type)
{
return (ppn << PTE_PPN_SHIFT) | PTE_V | type;
}
static inline pte_t ptd_create(uintptr_t ppn)
{
return pte_create(ppn, PTE_V);
}
#endif
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