/* $Id: pgtsun4c.h,v 1.1 2005-12-20 11:32:11 jcastillo Exp $
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/* $Id: pgtsun4c.h,v 1.1 2005-12-20 11:32:11 jcastillo Exp $
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* pgtsun4c.h: Sun4c specific pgtable.h defines and code.
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* pgtsun4c.h: Sun4c specific pgtable.h defines and code.
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*
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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*/
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#ifndef _SPARC_PGTSUN4C_H
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#ifndef _SPARC_PGTSUN4C_H
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#define _SPARC_PGTSUN4C_H
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#define _SPARC_PGTSUN4C_H
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/* PMD_SHIFT determines the size of the area a second-level page table can map */
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/* PMD_SHIFT determines the size of the area a second-level page table can map */
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#define SUN4C_PMD_SHIFT 22
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#define SUN4C_PMD_SHIFT 22
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#define SUN4C_PMD_SIZE (1UL << SUN4C_PMD_SHIFT)
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#define SUN4C_PMD_SIZE (1UL << SUN4C_PMD_SHIFT)
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#define SUN4C_PMD_MASK (~(SUN4C_PMD_SIZE-1))
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#define SUN4C_PMD_MASK (~(SUN4C_PMD_SIZE-1))
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#define SUN4C_PMD_ALIGN(addr) (((addr)+SUN4C_PMD_SIZE-1)&SUN4C_PMD_MASK)
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#define SUN4C_PMD_ALIGN(addr) (((addr)+SUN4C_PMD_SIZE-1)&SUN4C_PMD_MASK)
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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#define SUN4C_PGDIR_SHIFT 22
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#define SUN4C_PGDIR_SHIFT 22
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#define SUN4C_PGDIR_SIZE (1UL << SUN4C_PGDIR_SHIFT)
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#define SUN4C_PGDIR_SIZE (1UL << SUN4C_PGDIR_SHIFT)
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#define SUN4C_PGDIR_MASK (~(SUN4C_PGDIR_SIZE-1))
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#define SUN4C_PGDIR_MASK (~(SUN4C_PGDIR_SIZE-1))
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#define SUN4C_PGDIR_ALIGN(addr) (((addr)+SUN4C_PGDIR_SIZE-1)&SUN4C_PGDIR_MASK)
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#define SUN4C_PGDIR_ALIGN(addr) (((addr)+SUN4C_PGDIR_SIZE-1)&SUN4C_PGDIR_MASK)
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/* To represent how the sun4c mmu really lays things out. */
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/* To represent how the sun4c mmu really lays things out. */
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#define SUN4C_REAL_PGDIR_SHIFT 18
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#define SUN4C_REAL_PGDIR_SHIFT 18
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#define SUN4C_REAL_PGDIR_SIZE (1UL << SUN4C_REAL_PGDIR_SHIFT)
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#define SUN4C_REAL_PGDIR_SIZE (1UL << SUN4C_REAL_PGDIR_SHIFT)
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#define SUN4C_REAL_PGDIR_MASK (~(SUN4C_REAL_PGDIR_SIZE-1))
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#define SUN4C_REAL_PGDIR_MASK (~(SUN4C_REAL_PGDIR_SIZE-1))
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#define SUN4C_REAL_PGDIR_ALIGN(addr) (((addr)+SUN4C_REAL_PGDIR_SIZE-1)&SUN4C_REAL_PGDIR_MASK)
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#define SUN4C_REAL_PGDIR_ALIGN(addr) (((addr)+SUN4C_REAL_PGDIR_SIZE-1)&SUN4C_REAL_PGDIR_MASK)
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/*
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/*
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* To be efficient, and not have to worry about allocating such
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* To be efficient, and not have to worry about allocating such
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* a huge pgd, we make the kernel sun4c tables each hold 1024
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* a huge pgd, we make the kernel sun4c tables each hold 1024
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* entries and the pgd similarly just like the i386 tables.
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* entries and the pgd similarly just like the i386 tables.
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*/
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*/
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#define SUN4C_PTRS_PER_PTE 1024
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#define SUN4C_PTRS_PER_PTE 1024
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#define SUN4C_PTRS_PER_PMD 1
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#define SUN4C_PTRS_PER_PMD 1
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#define SUN4C_PTRS_PER_PGD 1024
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#define SUN4C_PTRS_PER_PGD 1024
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/* On the sun4c the physical ram limit is 128MB. We set up our I/O
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/* On the sun4c the physical ram limit is 128MB. We set up our I/O
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* translations at KERNBASE + 128MB for 1MB, then we begin the VMALLOC
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* translations at KERNBASE + 128MB for 1MB, then we begin the VMALLOC
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* area, makes sense. This works out to the value below.
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* area, makes sense. This works out to the value below.
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*/
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*/
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#define SUN4C_VMALLOC_START (0xfe200000)
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#define SUN4C_VMALLOC_START (0xfe200000)
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/*
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/*
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* Sparc SUN4C pte fields.
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* Sparc SUN4C pte fields.
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*/
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*/
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#define _SUN4C_PAGE_VALID 0x80000000 /* valid page */
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#define _SUN4C_PAGE_VALID 0x80000000 /* valid page */
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#define _SUN4C_PAGE_WRITE 0x40000000 /* can be written to */
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#define _SUN4C_PAGE_WRITE 0x40000000 /* can be written to */
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#define _SUN4C_PAGE_PRIV 0x20000000 /* bit to signify privileged page */
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#define _SUN4C_PAGE_PRIV 0x20000000 /* bit to signify privileged page */
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#define _SUN4C_PAGE_USER 0x00000000 /* User page */
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#define _SUN4C_PAGE_USER 0x00000000 /* User page */
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#define _SUN4C_PAGE_NOCACHE 0x10000000 /* non-cacheable page */
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#define _SUN4C_PAGE_NOCACHE 0x10000000 /* non-cacheable page */
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#define _SUN4C_PAGE_IO 0x04000000 /* I/O page */
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#define _SUN4C_PAGE_IO 0x04000000 /* I/O page */
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#define _SUN4C_PAGE_REF 0x02000000 /* Page has been accessed/referenced */
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#define _SUN4C_PAGE_REF 0x02000000 /* Page has been accessed/referenced */
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#define _SUN4C_PAGE_DIRTY 0x01000000 /* Page has been modified, is dirty */
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#define _SUN4C_PAGE_DIRTY 0x01000000 /* Page has been modified, is dirty */
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#define _SUN4C_PAGE_CHG_MASK (0xffff | _SUN4C_PAGE_REF | _SUN4C_PAGE_DIRTY)
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#define _SUN4C_PAGE_CHG_MASK (0xffff | _SUN4C_PAGE_REF | _SUN4C_PAGE_DIRTY)
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#define SUN4C_PAGE_NONE __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_PRIV | \
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#define SUN4C_PAGE_NONE __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_PRIV | \
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_SUN4C_PAGE_REF)
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_SUN4C_PAGE_REF)
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#define SUN4C_PAGE_SHARED __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_WRITE | \
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#define SUN4C_PAGE_SHARED __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_WRITE | \
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_SUN4C_PAGE_USER | _SUN4C_PAGE_REF)
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_SUN4C_PAGE_USER | _SUN4C_PAGE_REF)
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#define SUN4C_PAGE_COPY __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_USER | \
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#define SUN4C_PAGE_COPY __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_USER | \
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_SUN4C_PAGE_REF)
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_SUN4C_PAGE_REF)
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#define SUN4C_PAGE_READONLY __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_USER | \
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#define SUN4C_PAGE_READONLY __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_USER | \
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_SUN4C_PAGE_REF)
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_SUN4C_PAGE_REF)
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#define SUN4C_PAGE_KERNEL __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_WRITE | \
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#define SUN4C_PAGE_KERNEL __pgprot(_SUN4C_PAGE_VALID | _SUN4C_PAGE_WRITE | \
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_SUN4C_PAGE_PRIV | _SUN4C_PAGE_DIRTY | \
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_SUN4C_PAGE_PRIV | _SUN4C_PAGE_DIRTY | \
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_SUN4C_PAGE_REF | _SUN4C_PAGE_NOCACHE)
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_SUN4C_PAGE_REF | _SUN4C_PAGE_NOCACHE)
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extern __inline__ unsigned long sun4c_get_synchronous_error(void)
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extern __inline__ unsigned long sun4c_get_synchronous_error(void)
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{
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{
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unsigned long sync_err;
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unsigned long sync_err;
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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"=r" (sync_err) :
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"=r" (sync_err) :
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"r" (AC_SYNC_ERR), "i" (ASI_CONTROL));
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"r" (AC_SYNC_ERR), "i" (ASI_CONTROL));
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return sync_err;
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return sync_err;
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}
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}
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extern __inline__ unsigned long sun4c_get_synchronous_address(void)
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extern __inline__ unsigned long sun4c_get_synchronous_address(void)
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{
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{
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unsigned long sync_addr;
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unsigned long sync_addr;
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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__asm__ __volatile__("lda [%1] %2, %0\n\t" :
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"=r" (sync_addr) :
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"=r" (sync_addr) :
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"r" (AC_SYNC_VA), "i" (ASI_CONTROL));
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"r" (AC_SYNC_VA), "i" (ASI_CONTROL));
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return sync_addr;
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return sync_addr;
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}
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}
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/* SUN4C pte, segmap, and context manipulation */
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/* SUN4C pte, segmap, and context manipulation */
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extern __inline__ unsigned long sun4c_get_segmap(unsigned long addr)
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extern __inline__ unsigned long sun4c_get_segmap(unsigned long addr)
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{
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{
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register unsigned long entry;
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register unsigned long entry;
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__asm__ __volatile__("\n\tlduba [%1] %2, %0\n\t" :
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__asm__ __volatile__("\n\tlduba [%1] %2, %0\n\t" :
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"=r" (entry) :
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"=r" (entry) :
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"r" (addr), "i" (ASI_SEGMAP));
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"r" (addr), "i" (ASI_SEGMAP));
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return entry;
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return entry;
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}
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}
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extern __inline__ void sun4c_put_segmap(unsigned long addr, unsigned long entry)
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extern __inline__ void sun4c_put_segmap(unsigned long addr, unsigned long entry)
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{
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{
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__asm__ __volatile__("\n\tstba %1, [%0] %2\n\t" : :
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__asm__ __volatile__("\n\tstba %1, [%0] %2\n\t" : :
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"r" (addr), "r" (entry),
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"r" (addr), "r" (entry),
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"i" (ASI_SEGMAP));
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"i" (ASI_SEGMAP));
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return;
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return;
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}
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}
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extern __inline__ unsigned long sun4c_get_pte(unsigned long addr)
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extern __inline__ unsigned long sun4c_get_pte(unsigned long addr)
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{
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{
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register unsigned long entry;
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register unsigned long entry;
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__asm__ __volatile__("\n\tlda [%1] %2, %0\n\t" :
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__asm__ __volatile__("\n\tlda [%1] %2, %0\n\t" :
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"=r" (entry) :
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"=r" (entry) :
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"r" (addr), "i" (ASI_PTE));
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"r" (addr), "i" (ASI_PTE));
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return entry;
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return entry;
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}
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}
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extern __inline__ void sun4c_put_pte(unsigned long addr, unsigned long entry)
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extern __inline__ void sun4c_put_pte(unsigned long addr, unsigned long entry)
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{
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{
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__asm__ __volatile__("\n\tsta %1, [%0] %2\n\t" : :
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__asm__ __volatile__("\n\tsta %1, [%0] %2\n\t" : :
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"r" (addr),
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"r" (addr),
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"r" (entry), "i" (ASI_PTE));
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"r" (entry), "i" (ASI_PTE));
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return;
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return;
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}
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}
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extern __inline__ int sun4c_get_context(void)
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extern __inline__ int sun4c_get_context(void)
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{
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{
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register int ctx;
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register int ctx;
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__asm__ __volatile__("\n\tlduba [%1] %2, %0\n\t" :
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__asm__ __volatile__("\n\tlduba [%1] %2, %0\n\t" :
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"=r" (ctx) :
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"=r" (ctx) :
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"r" (AC_CONTEXT), "i" (ASI_CONTROL));
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"r" (AC_CONTEXT), "i" (ASI_CONTROL));
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return ctx;
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return ctx;
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}
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}
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extern __inline__ int sun4c_set_context(int ctx)
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extern __inline__ int sun4c_set_context(int ctx)
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{
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{
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__asm__ __volatile__("\n\tstba %0, [%1] %2\n\t" : :
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__asm__ __volatile__("\n\tstba %0, [%1] %2\n\t" : :
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"r" (ctx), "r" (AC_CONTEXT), "i" (ASI_CONTROL));
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"r" (ctx), "r" (AC_CONTEXT), "i" (ASI_CONTROL));
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return ctx;
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return ctx;
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}
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}
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#endif /* !(_SPARC_PGTSUN4C_H) */
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#endif /* !(_SPARC_PGTSUN4C_H) */
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