pgtsun4.h
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- /* $Id: pgtsun4.h,v 1.5 2000/06/05 06:08:46 anton Exp $
- * pgtsun4.h: Sun4 specific pgtable.h defines and code.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #ifndef _SPARC_PGTSUN4C_H
- #define _SPARC_PGTSUN4C_H
- #include <asm/contregs.h>
- /* PMD_SHIFT determines the size of the area a second-level page table can map */
- #define SUN4C_PMD_SHIFT 23
- #define SUN4C_PMD_SIZE (1UL << SUN4C_PMD_SHIFT)
- #define SUN4C_PMD_MASK (~(SUN4C_PMD_SIZE-1))
- #define SUN4C_PMD_ALIGN(addr) (((addr)+SUN4C_PMD_SIZE-1)&SUN4C_PMD_MASK)
- /* PGDIR_SHIFT determines what a third-level page table entry can map */
- #define SUN4C_PGDIR_SHIFT 23
- #define SUN4C_PGDIR_SIZE (1UL << SUN4C_PGDIR_SHIFT)
- #define SUN4C_PGDIR_MASK (~(SUN4C_PGDIR_SIZE-1))
- #define SUN4C_PGDIR_ALIGN(addr) (((addr)+SUN4C_PGDIR_SIZE-1)&SUN4C_PGDIR_MASK)
- /* To represent how the sun4c mmu really lays things out. */
- #define SUN4C_REAL_PGDIR_SHIFT 18
- #define SUN4C_REAL_PGDIR_SIZE (1UL << SUN4C_REAL_PGDIR_SHIFT)
- #define SUN4C_REAL_PGDIR_MASK (~(SUN4C_REAL_PGDIR_SIZE-1))
- #define SUN4C_REAL_PGDIR_ALIGN(addr) (((addr)+SUN4C_REAL_PGDIR_SIZE-1)&SUN4C_REAL_PGDIR_MASK)
- /* 19 bit PFN on sun4 */
- #define SUN4C_PFN_MASK 0x7ffff
-
- /* Don't increase these unless the structures in sun4c.c are fixed */
- #define SUN4C_MAX_SEGMAPS 256
- #define SUN4C_MAX_CONTEXTS 16
- /*
- * To be efficient, and not have to worry about allocating such
- * a huge pgd, we make the kernel sun4c tables each hold 1024
- * entries and the pgd similarly just like the i386 tables.
- */
- #define SUN4C_PTRS_PER_PTE 1024
- #define SUN4C_PTRS_PER_PMD 1
- #define SUN4C_PTRS_PER_PGD 1024
- /*
- * Sparc SUN4C pte fields.
- */
- #define _SUN4C_PAGE_VALID 0x80000000
- #define _SUN4C_PAGE_SILENT_READ 0x80000000 /* synonym */
- #define _SUN4C_PAGE_DIRTY 0x40000000
- #define _SUN4C_PAGE_SILENT_WRITE 0x40000000 /* synonym */
- #define _SUN4C_PAGE_PRIV 0x20000000 /* privileged page */
- #define _SUN4C_PAGE_NOCACHE 0x10000000 /* non-cacheable page */
- #define _SUN4C_PAGE_PRESENT 0x08000000 /* implemented in software */
- #define _SUN4C_PAGE_IO 0x04000000 /* I/O page */
- #define _SUN4C_PAGE_READ 0x00800000 /* implemented in software */
- #define _SUN4C_PAGE_WRITE 0x00400000 /* implemented in software */
- #define _SUN4C_PAGE_ACCESSED 0x00200000 /* implemented in software */
- #define _SUN4C_PAGE_MODIFIED 0x00100000 /* implemented in software */
- #define _SUN4C_READABLE (_SUN4C_PAGE_READ|_SUN4C_PAGE_SILENT_READ|
- _SUN4C_PAGE_ACCESSED)
- #define _SUN4C_WRITEABLE (_SUN4C_PAGE_WRITE|_SUN4C_PAGE_SILENT_WRITE|
- _SUN4C_PAGE_MODIFIED)
- #define _SUN4C_PAGE_CHG_MASK (0xffff|_SUN4C_PAGE_ACCESSED|_SUN4C_PAGE_MODIFIED)
- #define SUN4C_PAGE_NONE __pgprot(_SUN4C_PAGE_PRESENT)
- #define SUN4C_PAGE_SHARED __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE|
- _SUN4C_PAGE_WRITE)
- #define SUN4C_PAGE_COPY __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE)
- #define SUN4C_PAGE_READONLY __pgprot(_SUN4C_PAGE_PRESENT|_SUN4C_READABLE)
- #define SUN4C_PAGE_KERNEL __pgprot(_SUN4C_READABLE|_SUN4C_WRITEABLE|
- _SUN4C_PAGE_DIRTY|_SUN4C_PAGE_PRIV)
- #ifndef __ASSEMBLY__
- extern __inline__ unsigned long sun4c_get_synchronous_error(void)
- {
- unsigned long sync_err;
- __asm__ __volatile__("lda [%1] %2, %0nt" :
- "=r" (sync_err) :
- "r" (AC_SYNC_ERR), "i" (ASI_CONTROL));
- return sync_err;
- }
- extern __inline__ unsigned long sun4c_get_synchronous_address(void)
- {
- unsigned long sync_addr;
- __asm__ __volatile__("lda [%1] %2, %0nt" :
- "=r" (sync_addr) :
- "r" (AC_SYNC_VA), "i" (ASI_CONTROL));
- return sync_addr;
- }
- /* SUN4 pte, segmap, and context manipulation */
- extern __inline__ unsigned long sun4c_get_segmap(unsigned long addr)
- {
- register unsigned long entry;
- __asm__ __volatile__("ntlduha [%1] %2, %0nt" :
- "=r" (entry) :
- "r" (addr), "i" (ASI_SEGMAP));
- return entry;
- }
- extern __inline__ void sun4c_put_segmap(unsigned long addr, unsigned long entry)
- {
- __asm__ __volatile__("ntstha %1, [%0] %2; nop; nop; nop;nt" : :
- "r" (addr), "r" (entry),
- "i" (ASI_SEGMAP));
- }
- extern __inline__ unsigned long sun4c_get_pte(unsigned long addr)
- {
- register unsigned long entry;
- __asm__ __volatile__("ntlda [%1] %2, %0nt" :
- "=r" (entry) :
- "r" (addr), "i" (ASI_PTE));
- return entry;
- }
- extern __inline__ void sun4c_put_pte(unsigned long addr, unsigned long entry)
- {
- __asm__ __volatile__("ntsta %1, [%0] %2; nop; nop; nop;nt" : :
- "r" (addr),
- "r" ((entry & ~(_SUN4C_PAGE_PRESENT))), "i" (ASI_PTE));
- }
- extern __inline__ int sun4c_get_context(void)
- {
- register int ctx;
- __asm__ __volatile__("ntlduba [%1] %2, %0nt" :
- "=r" (ctx) :
- "r" (AC_CONTEXT), "i" (ASI_CONTROL));
- return ctx;
- }
- extern __inline__ int sun4c_set_context(int ctx)
- {
- __asm__ __volatile__("ntstba %0, [%1] %2; nop; nop; nop;nt" : :
- "r" (ctx), "r" (AC_CONTEXT), "i" (ASI_CONTROL));
- return ctx;
- }
- #endif /* !(__ASSEMBLY__) */
- #endif /* !(_SPARC_PGTSUN4_H) */