cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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page_64.h (4753B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _SPARC64_PAGE_H
      3#define _SPARC64_PAGE_H
      4
      5#include <linux/const.h>
      6
      7#define PAGE_SHIFT   13
      8
      9#define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
     10#define PAGE_MASK    (~(PAGE_SIZE-1))
     11
     12/* Flushing for D-cache alias handling is only needed if
     13 * the page size is smaller than 16K.
     14 */
     15#if PAGE_SHIFT < 14
     16#define DCACHE_ALIASING_POSSIBLE
     17#endif
     18
     19#define HPAGE_SHIFT		23
     20#define REAL_HPAGE_SHIFT	22
     21#define HPAGE_16GB_SHIFT	34
     22#define HPAGE_2GB_SHIFT		31
     23#define HPAGE_256MB_SHIFT	28
     24#define HPAGE_64K_SHIFT		16
     25#define REAL_HPAGE_SIZE		(_AC(1,UL) << REAL_HPAGE_SHIFT)
     26
     27#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
     28#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
     29#define HPAGE_MASK		(~(HPAGE_SIZE - 1UL))
     30#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
     31#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
     32#define REAL_HPAGE_PER_HPAGE	(_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
     33#define HUGE_MAX_HSTATE		5
     34#endif
     35
     36#ifndef __ASSEMBLY__
     37
     38#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
     39struct pt_regs;
     40void hugetlb_setup(struct pt_regs *regs);
     41#endif
     42
     43#define WANT_PAGE_VIRTUAL
     44
     45void _clear_page(void *page);
     46#define clear_page(X)	_clear_page((void *)(X))
     47struct page;
     48void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
     49#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
     50void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
     51#define __HAVE_ARCH_COPY_USER_HIGHPAGE
     52struct vm_area_struct;
     53void copy_user_highpage(struct page *to, struct page *from,
     54			unsigned long vaddr, struct vm_area_struct *vma);
     55#define __HAVE_ARCH_COPY_HIGHPAGE
     56void copy_highpage(struct page *to, struct page *from);
     57
     58/* Unlike sparc32, sparc64's parameter passing API is more
     59 * sane in that structures which as small enough are passed
     60 * in registers instead of on the stack.  Thus, setting
     61 * STRICT_MM_TYPECHECKS does not generate worse code so
     62 * let's enable it to get the type checking.
     63 */
     64
     65#define STRICT_MM_TYPECHECKS
     66
     67#ifdef STRICT_MM_TYPECHECKS
     68/* These are used to make use of C type-checking.. */
     69typedef struct { unsigned long pte; } pte_t;
     70typedef struct { unsigned long iopte; } iopte_t;
     71typedef struct { unsigned long pmd; } pmd_t;
     72typedef struct { unsigned long pud; } pud_t;
     73typedef struct { unsigned long pgd; } pgd_t;
     74typedef struct { unsigned long pgprot; } pgprot_t;
     75
     76#define pte_val(x)	((x).pte)
     77#define iopte_val(x)	((x).iopte)
     78#define pmd_val(x)      ((x).pmd)
     79#define pud_val(x)      ((x).pud)
     80#define pgd_val(x)	((x).pgd)
     81#define pgprot_val(x)	((x).pgprot)
     82
     83#define __pte(x)	((pte_t) { (x) } )
     84#define __iopte(x)	((iopte_t) { (x) } )
     85#define __pmd(x)        ((pmd_t) { (x) } )
     86#define __pud(x)        ((pud_t) { (x) } )
     87#define __pgd(x)	((pgd_t) { (x) } )
     88#define __pgprot(x)	((pgprot_t) { (x) } )
     89
     90#else
     91/* .. while these make it easier on the compiler */
     92typedef unsigned long pte_t;
     93typedef unsigned long iopte_t;
     94typedef unsigned long pmd_t;
     95typedef unsigned long pud_t;
     96typedef unsigned long pgd_t;
     97typedef unsigned long pgprot_t;
     98
     99#define pte_val(x)	(x)
    100#define iopte_val(x)	(x)
    101#define pmd_val(x)      (x)
    102#define pud_val(x)      (x)
    103#define pgd_val(x)	(x)
    104#define pgprot_val(x)	(x)
    105
    106#define __pte(x)	(x)
    107#define __iopte(x)	(x)
    108#define __pmd(x)        (x)
    109#define __pud(x)        (x)
    110#define __pgd(x)	(x)
    111#define __pgprot(x)	(x)
    112
    113#endif /* (STRICT_MM_TYPECHECKS) */
    114
    115typedef pte_t *pgtable_t;
    116
    117extern unsigned long sparc64_va_hole_top;
    118extern unsigned long sparc64_va_hole_bottom;
    119
    120/* The next two defines specify the actual exclusion region we
    121 * enforce, wherein we use a 4GB red zone on each side of the VA hole.
    122 */
    123#define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
    124#define VA_EXCLUDE_END   (sparc64_va_hole_top + (1UL << 32UL))
    125
    126#define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_32BIT) ? \
    127				 _AC(0x0000000070000000,UL) : \
    128				 VA_EXCLUDE_END)
    129
    130#include <asm-generic/memory_model.h>
    131
    132extern unsigned long PAGE_OFFSET;
    133
    134#endif /* !(__ASSEMBLY__) */
    135
    136/* The maximum number of physical memory address bits we support.  The
    137 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
    138 * evaluates to.
    139 */
    140#define MAX_PHYS_ADDRESS_BITS	53
    141
    142#define ILOG2_4MB		22
    143#define ILOG2_256MB		28
    144
    145#ifndef __ASSEMBLY__
    146
    147#define __pa(x)			((unsigned long)(x) - PAGE_OFFSET)
    148#define __va(x)			((void *)((unsigned long) (x) + PAGE_OFFSET))
    149
    150#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
    151
    152#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
    153
    154#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
    155
    156#define virt_to_phys __pa
    157#define phys_to_virt __va
    158
    159#endif /* !(__ASSEMBLY__) */
    160
    161#include <asm-generic/getorder.h>
    162
    163#endif /* _SPARC64_PAGE_H */