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Length: 3400 (0xd48)
Types: TextFile
Notes: @(#)pte.h 13.1 (RC Computer) 91/02/02 */
Names: »pte.h«
└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
└─⟦bbf173f5c⟧ »0004«
└─⟦this⟧ »./usr/include/rc/pte.h«
/* @(#)pte.h 13.1 (RC Computer) 91/02/02 */
/*
* RC9000 page table entry
*
* There are two major kinds of pte's: those which have ever existed (and are
* thus either now in core or on the swap device), and those which have
* never existed, but which will be filled on demand at first reference.
* There is a structure describing each. There is also an ancillary
* structure used in page clustering.
*/
#ifdef LANGUAGE_C
struct pte
{
#ifdef MIPSEB
unsigned int pg_pfnum:20, /* HW: core page frame number or 0 */
pg_n:1, /* HW: non-cacheable bit */
pg_m:1, /* HW: modified (dirty) bit */
pg_v:1, /* HW: valid bit */
pg_g:1, /* HW: ignore pid bit */
#ifdef RPU
pg_uku:1, /* RTE: Used in KUSEG */
pg_rku:1, /* RTE: Reserved for KUSEG */
pg_uk2:1, /* RTE: Used in KSEG2 */
pg_rk2:1, /* RTE: Reserved for KSEG2 */
#else UPU
:3,
pg_swapm:1, /* SW: page must be forced to swap */
#endif
pg_flush:1, /* SW: flush i-cache before use */
pg_fod:1, /* SW: is fill on demand (=0) */
pg_prot:2; /* SW: access control */
#endif MIPSEB
#ifdef MIPSEL
unsigned int pg_prot:2, /* SW: access control */
pg_fod:1, /* SW: is fill on demand (=0) */
pg_flush:1, /* SW: flush i-cache before use */
#ifdef RPU
pg_rk2:1, /* RTE: Reserved for KSEG2 */
pg_uk2:1, /* RTE: Used in KSEG2 */
pg_rku:1, /* RTE: Reserved for KUSEG */
pg_uku:1, /* RTE: Used in KUSEG */
#else UPU
pg_swapm:1, /* SW: page must be forced to swap */
:3,
#endif
pg_g:1, /* HW: ignore pid bit */
pg_v:1, /* HW: valid bit */
pg_m:1, /* HW: modified (dirty) bit */
pg_n:1, /* HW: non-cacheable bit */
pg_pfnum:20; /* HW: core page frame number or 0 */
#endif MIPSEL
};
struct hpte
{
#ifdef MIPSEB
unsigned int pg_pfnum:20,
pg_high:12; /* special for clustering */
#endif MIPSEB
#ifdef MIPSEL
unsigned int pg_high:12, /* special for clustering */
pg_pfnum:20;
#endif MIPSEL
};
struct fpte
{
#ifdef MIPSEB
unsigned int pg_blkno:20, /* file system block number */
:4, /* overlays v,m,g,n bits */
pg_fileno:4, /* file mapped from or TEXT or ZERO */
pg_flush:1, /* flush i-cache before use */
pg_fod:1, /* is fill on demand (=1) */
pg_prot:2;
#endif MIPSEB
#ifdef MIPSEL
unsigned int pg_prot:2,
pg_fod:1, /* is fill on demand (=1) */
pg_flush:1, /* flush i-cache before use */
pg_fileno:4, /* file mapped from or TEXT or ZERO */
:4, /* overlays v,m,g,n bits */
pg_blkno:20; /* file system block number */
#endif MIPSEL
};
#endif LANGUAGE_C
#define PG_PFNUM 0xfffff000
#define PG_N 0x00000800
#define PG_M 0x00000400
#define PG_V 0x00000200
#define PG_G 0x00000100
#define PG_FILENO 0x000000f0
#define PG_SWAPM 0x00000010
#define PG_FLUSH 0x00000008
#define PG_FOD 0x00000004
#define PG_PROT 0x00000003
#define PG_FZERO (14)
#define PG_FTEXT (15)
#define PG_FMAX (PG_FTEXT)
#ifdef RPU
#define PG_UKU 0x00000080
#define PG_RKU 0x00000040
#define PG_UK2 0x00000020
#define PG_RK2 0x00000010
#endif
#define PG_KR 0x00000000
#define PG_KW 0x00000001
#define PG_URKR 0x00000002
#define PG_UW 0x00000003
#define PROT_KR 0
#define PROT_KW 1
#define PROT_URKR 2
#define PROT_UW 3
#define PTE_PFNSHIFT 12
#define PTE_FILENOSHIFT 4
/*
* Pte related macros
*/
#define dirty(pte) \
((pte)->pg_fod == 0 && (pte)->pg_pfnum && ((pte)->pg_m || (pte)->pg_swapm))
#ifdef LANGUAGE_C
#endif LANGUAGE_C