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Ignore whitespace Rev 120 → Rev 121

/SPARTAN/trunk/arch/mips/include/mm/page.h
29,8 → 29,11
#ifndef __mips_PAGE_H__
#define __mips_PAGE_H__
 
#include <arch/mm/tlb.h>
#include <mm/page.h>
#include <arch/mm/frame.h>
#include <arch/types.h>
#include <arch.h>
 
#define PAGE_SIZE FRAME_SIZE
 
37,39 → 40,74
#define KA2PA(x) ((x) - 0x80000000)
#define PA2KA(x) ((x) + 0x80000000)
 
#define page_arch_init() ;
 
/*
* Implementation of generic 4-level page table interface.
* TODO: this is a fake implementation provided to satisfy the compiler
* NOTE: this implementation is under construction
*
* Page table layout:
* - 32-bit virtual addresses
* - Offset is 14 bits => pages are 16K long
* - PTE's use the same format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
* - PTL0 has 64 entries (6 bits)
* - PTL1 is not used
* - PTL2 is not used
* - PTL3 has 4096 entries (12 bits)
*/
#define PTL0_INDEX_ARCH(vaddr) 0
#define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26)
#define PTL1_INDEX_ARCH(vaddr) 0
#define PTL2_INDEX_ARCH(vaddr) 0
#define PTL3_INDEX_ARCH(vaddr) 0
#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0xfff)
 
#define GET_PTL0_ADDRESS_ARCH() ((pte_t *) 0)
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) 0)
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t *) 0)
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t *) 0)
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((pte_t *) 0)
#define GET_PTL0_ADDRESS_ARCH() (PTL0)
#define SET_PTL0_ADDRESS_ARCH(ptl0) (PTL0 = (pte_t *)(ptl0))
 
#define SET_PTL0_ADDRESS_ARCH(ptl0)
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].pfn<<14)
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].pfn<<14)
 
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].pfn = (a)>>14)
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].pfn = (a)>>14)
 
#define GET_PTL1_FLAGS_ARCH(ptl0, i) 0
#define GET_PTL2_FLAGS_ARCH(ptl1, i) 0
#define GET_PTL3_FLAGS_ARCH(ptl2, i) 0
#define GET_FRAME_FLAGS_ARCH(ptl3, i) 0
#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
 
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
 
typedef __u32 pte_t;
static inline int get_pt_flags(pte_t *pt, index_t i)
{
pte_t *p = &pt[i];
return (
((p->c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) |
((!p->v)<<PAGE_PRESENT_SHIFT) |
(1<<PAGE_USER_SHIFT) |
(1<<PAGE_READ_SHIFT) |
((p->d)<<PAGE_WRITE_SHIFT) |
(1<<PAGE_EXEC_SHIFT)
);
}
 
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
{
pte_t *p = &pt[i];
p->c = (flags & PAGE_CACHEABLE) ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED;
p->v = !(flags & PAGE_NOT_PRESENT);
p->d = flags & PAGE_WRITE;
}
 
extern void page_arch_init(void);
 
extern pte_t *PTL0;
 
#endif