nuclear@17: #ifndef VM_H_
nuclear@17: #define VM_H_
nuclear@17: 
nuclear@17: #include <stdlib.h>
nuclear@17: #include "mboot.h"
nuclear@68: #include "rbtree.h"
nuclear@17: 
nuclear@47: #define KMEM_START		0xc0000000
nuclear@68: #define KMEM_START_PAGE	ADDR_TO_PAGE(KMEM_START)
nuclear@47: 
nuclear@17: /* page mapping flags */
nuclear@17: #define PG_PRESENT			(1 << 0)
nuclear@17: #define PG_WRITABLE			(1 << 1)
nuclear@17: #define PG_USER				(1 << 2)
nuclear@17: #define PG_WRITE_THROUGH	(1 << 3)
nuclear@17: #define PG_NOCACHE			(1 << 4)
nuclear@17: #define PG_ACCESSED			(1 << 5)
nuclear@17: #define PG_DIRTY			(1 << 6)
nuclear@17: #define PG_TYPE				(1 << 7)
nuclear@17: /* PG_GLOBAL mappings won't flush from TLB */
nuclear@17: #define PG_GLOBAL			(1 << 8)
nuclear@17: 
nuclear@17: 
nuclear@17: #define PGSIZE					4096
nuclear@23: #define PAGE_COUNT				(1024 * 1024)
nuclear@23: 
nuclear@17: #define PGOFFS_MASK				0xfff
nuclear@17: #define PGNUM_MASK				0xfffff000
nuclear@18: #define PGENT_ADDR_MASK			PGNUM_MASK
nuclear@17: 
nuclear@23: #define ADDR_TO_PAGE(x)			((uint32_t)(x) >> 12)
nuclear@23: #define PAGE_TO_ADDR(x)			((uint32_t)(x) << 12)
nuclear@17: 
nuclear@17: #define ADDR_TO_PGTBL(x)		((uint32_t)(x) >> 22)
nuclear@17: #define ADDR_TO_PGTBL_PG(x)		(((uint32_t)(x) >> 12) & 0x3ff)
nuclear@17: #define ADDR_TO_PGOFFS(x)		((uint32_t)(x) & PGOFFS_MASK)
nuclear@17: 
nuclear@17: #define PAGE_TO_PGTBL(x)		((uint32_t)(x) >> 10)
nuclear@17: #define PAGE_TO_PGTBL_PG(x)		((uint32_t)(x) & 0x3ff)
nuclear@17: 
nuclear@57: /* argument to clone_vm */
nuclear@57: #define CLONE_SHARED	0
nuclear@57: #define CLONE_COW		1
nuclear@57: 
nuclear@57: /* last argument to *_page_bit */
nuclear@57: #define PAGE_ONLY		0
nuclear@57: #define WHOLE_PATH		1
nuclear@17: 
nuclear@68: struct vm_page {
nuclear@68: 	int vpage, ppage;
nuclear@68: 	unsigned int flags;
nuclear@68: 
nuclear@68: 	int nref;
nuclear@68: };
nuclear@68: 
nuclear@69: struct process;
nuclear@69: 
nuclear@26: void init_vm(void);
nuclear@17: 
nuclear@23: int map_page(int vpage, int ppage, unsigned int attr);
nuclear@43: int unmap_page(int vpage);
nuclear@23: int map_page_range(int vpg_start, int pgcount, int ppg_start, unsigned int attr);
nuclear@43: int unmap_page_range(int vpg_start, int pgcount);
nuclear@23: int map_mem_range(uint32_t vaddr, size_t sz, uint32_t paddr, unsigned int attr);
nuclear@17: 
nuclear@69: uint32_t virt_to_phys(uint32_t vaddr);
nuclear@43: int virt_to_phys_page(int vpg);
nuclear@69: 
nuclear@69: uint32_t virt_to_phys_proc(struct process *p, uint32_t vaddr);
nuclear@69: int virt_to_phys_page_proc(struct process *p, int vpg);
nuclear@18: 
nuclear@22: enum {
nuclear@22: 	MEM_KERNEL,
nuclear@22: 	MEM_USER
nuclear@22: };
nuclear@22: 
nuclear@22: int pgalloc(int num, int area);
nuclear@47: int pgalloc_vrange(int start, int num);
nuclear@23: void pgfree(int start, int num);
nuclear@23: 
nuclear@69: void clone_vm(struct process *pdest, struct process *psrc, int cow);
nuclear@57: 
nuclear@57: int get_page_bit(int pgnum, uint32_t bit, int wholepath);
nuclear@57: void set_page_bit(int pgnum, uint32_t bit, int wholepath);
nuclear@57: void clear_page_bit(int pgnum, uint32_t bit, int wholepath);
nuclear@43: 
nuclear@68: /* construct the vm map for the current user mappings */
nuclear@68: int cons_vmmap(struct rbtree *vmmap);
nuclear@68: 
nuclear@69: struct vm_page *get_vm_page(int vpg);
nuclear@69: struct vm_page *get_vm_page_proc(struct process *p, int vpg);
nuclear@69: 
nuclear@23: void dbg_print_vm(int area);
nuclear@22: 
nuclear@47: /* defined in vm-asm.S */
nuclear@47: void set_pgdir_addr(uint32_t addr);
nuclear@55: uint32_t get_pgdir_addr(void);
nuclear@47: 
nuclear@17: #endif	/* VM_H_ */