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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_PAGE_H
#define _ASM_IA64_PAGE_H
/*
 * Pagetable related stuff.
 *
 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <asm/intrinsics.h>
#include <asm/types.h>

/*
 * The top three bits of an IA64 address are its Region Number.
 * Different regions are assigned to different purposes.
 */
#define RGN_SHIFT	(61)
#define RGN_BASE(r)	(__IA64_UL_CONST(r)<<RGN_SHIFT)
#define RGN_BITS	(RGN_BASE(-1))

#define RGN_KERNEL	7	/* Identity mapped region */
#define RGN_UNCACHED    6	/* Identity mapped I/O region */
#define RGN_GATE	5	/* Gate page, Kernel text, etc */
#define RGN_HPAGE	4	/* For Huge TLB pages */

/*
 * PAGE_SHIFT determines the actual kernel page size.
 */
#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
# define PAGE_SHIFT	12
#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
# define PAGE_SHIFT	13
#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
# define PAGE_SHIFT	14
#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
# define PAGE_SHIFT	16
#else
# error Unsupported page size!
#endif

#define PAGE_SIZE		(__IA64_UL_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK		(~(PAGE_SIZE - 1))

#define PERCPU_PAGE_SHIFT	18	/* log2() of max. size of per-CPU area */
#define PERCPU_PAGE_SIZE	(__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)


#ifdef CONFIG_HUGETLB_PAGE
# define HPAGE_REGION_BASE	RGN_BASE(RGN_HPAGE)
# define HPAGE_SHIFT		hpage_shift
# define HPAGE_SHIFT_DEFAULT	28	/* check ia64 SDM for architecture supported size */
# define HPAGE_SIZE		(__IA64_UL_CONST(1) << HPAGE_SHIFT)
# define HPAGE_MASK		(~(HPAGE_SIZE - 1))

# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif /* CONFIG_HUGETLB_PAGE */

#ifdef __ASSEMBLY__
# define __pa(x)		((x) - PAGE_OFFSET)
# define __va(x)		((x) + PAGE_OFFSET)
#else /* !__ASSEMBLY */
#  define STRICT_MM_TYPECHECKS

extern void clear_page (void *page);
extern void copy_page (void *to, void *from);

/*
 * clear_user_page() and copy_user_page() can't be inline functions because
 * flush_dcache_page() can't be defined until later...
 */
#define clear_user_page(addr, vaddr, page)	\
do {						\
	clear_page(addr);			\
	flush_dcache_page(page);		\
} while (0)

#define copy_user_page(to, from, vaddr, page)	\
do {						\
	copy_page((to), (from));		\
	flush_dcache_page(page);		\
} while (0)


#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr)		\
({									\
	struct page *page = alloc_page_vma(				\
		GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr);	\
	if (page)							\
 		flush_dcache_page(page);				\
	page;								\
})

#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#ifdef CONFIG_VIRTUAL_MEM_MAP
extern int ia64_pfn_valid (unsigned long pfn);
#else
# define ia64_pfn_valid(pfn) 1
#endif

#ifdef CONFIG_VIRTUAL_MEM_MAP
extern struct page *vmem_map;
#ifdef CONFIG_DISCONTIGMEM
# define page_to_pfn(page)	((unsigned long) (page - vmem_map))
# define pfn_to_page(pfn)	(vmem_map + (pfn))
# define __pfn_to_phys(pfn)	PFN_PHYS(pfn)
#else
# include <asm-generic/memory_model.h>
#endif
#else
# include <asm-generic/memory_model.h>
#endif

#ifdef CONFIG_FLATMEM
# define pfn_valid(pfn)		(((pfn) < max_mapnr) && ia64_pfn_valid(pfn))
#elif defined(CONFIG_DISCONTIGMEM)
extern unsigned long min_low_pfn;
extern unsigned long max_low_pfn;
# define pfn_valid(pfn)		(((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
#endif

#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)

typedef union ia64_va {
	struct {
		unsigned long off : 61;		/* intra-region offset */
		unsigned long reg :  3;		/* region number */
	} f;
	unsigned long l;
	void *p;
} ia64_va;

/*
 * Note: These macros depend on the fact that PAGE_OFFSET has all
 * region bits set to 1 and all other bits set to zero.  They are
 * expressed in this way to ensure they result in a single "dep"
 * instruction.
 */
#define __pa(x)		({ia64_va _v; _v.l = (long) (x); _v.f.reg = 0; _v.l;})
#define __va(x)		({ia64_va _v; _v.l = (long) (x); _v.f.reg = -1; _v.p;})

#define REGION_NUMBER(x)	({ia64_va _v; _v.l = (long) (x); _v.f.reg;})
#define REGION_OFFSET(x)	({ia64_va _v; _v.l = (long) (x); _v.f.off;})

#ifdef CONFIG_HUGETLB_PAGE
# define htlbpage_to_page(x)	(((unsigned long) REGION_NUMBER(x) << 61)			\
				 | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
# define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
extern unsigned int hpage_shift;
#endif

static __inline__ int
get_order (unsigned long size)
{
	long double d = size - 1;
	long order;

	order = ia64_getf_exp(d);
	order = order - PAGE_SHIFT - 0xffff + 1;
	if (order < 0)
		order = 0;
	return order;
}

#endif /* !__ASSEMBLY__ */

#ifdef STRICT_MM_TYPECHECKS
  /*
   * These are used to make use of C type-checking..
   */
  typedef struct { unsigned long pte; } pte_t;
  typedef struct { unsigned long pmd; } pmd_t;
#if CONFIG_PGTABLE_LEVELS == 4
  typedef struct { unsigned long pud; } pud_t;
#endif
  typedef struct { unsigned long pgd; } pgd_t;
  typedef struct { unsigned long pgprot; } pgprot_t;
  typedef struct page *pgtable_t;

# define pte_val(x)	((x).pte)
# define pmd_val(x)	((x).pmd)
#if CONFIG_PGTABLE_LEVELS == 4
# define pud_val(x)	((x).pud)
#endif
# define pgd_val(x)	((x).pgd)
# define pgprot_val(x)	((x).pgprot)

# define __pte(x)	((pte_t) { (x) } )
# define __pmd(x)	((pmd_t) { (x) } )
# define __pgprot(x)	((pgprot_t) { (x) } )

#else /* !STRICT_MM_TYPECHECKS */
  /*
   * .. while these make it easier on the compiler
   */
# ifndef __ASSEMBLY__
    typedef unsigned long pte_t;
    typedef unsigned long pmd_t;
    typedef unsigned long pgd_t;
    typedef unsigned long pgprot_t;
    typedef struct page *pgtable_t;
# endif

# define pte_val(x)	(x)
# define pmd_val(x)	(x)
# define pgd_val(x)	(x)
# define pgprot_val(x)	(x)

# define __pte(x)	(x)
# define __pgd(x)	(x)
# define __pgprot(x)	(x)
#endif /* !STRICT_MM_TYPECHECKS */

#define PAGE_OFFSET			RGN_BASE(RGN_KERNEL)

#define VM_DATA_DEFAULT_FLAGS		(VM_READ | VM_WRITE |					\
					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC |		\
					 (((current->personality & READ_IMPLIES_EXEC) != 0)	\
					  ? VM_EXEC : 0))

#define GATE_ADDR		RGN_BASE(RGN_GATE)

/*
 * 0xa000000000000000+2*PERCPU_PAGE_SIZE
 * - 0xa000000000000000+3*PERCPU_PAGE_SIZE remain unmapped (guard page)
 */
#define KERNEL_START		 (GATE_ADDR+__IA64_UL_CONST(0x100000000))
#define PERCPU_ADDR		(-PERCPU_PAGE_SIZE)
#define LOAD_OFFSET		(KERNEL_START - KERNEL_TR_PAGE_SIZE)

#define __HAVE_ARCH_GATE_AREA	1

#endif /* _ASM_IA64_PAGE_H */

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native Folder 0755
sn Folder 0755
uv Folder 0755
Kbuild File 224 B 0644
acenv.h File 1.27 KB 0644
acpi-ext.h File 590 B 0644
acpi.h File 4.1 KB 0644
agp.h File 857 B 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 890 B 0644
asmmacro.h File 3.29 KB 0644
atomic.h File 9.47 KB 0644
barrier.h File 2.36 KB 0644
bitops.h File 10.84 KB 0644
bug.h File 404 B 0644
bugs.h File 436 B 0644
cache.h File 771 B 0644
cacheflush.h File 1.71 KB 0644
checksum.h File 2.1 KB 0644
clocksource.h File 276 B 0644
cpu.h File 456 B 0644
cputime.h File 855 B 0644
current.h File 418 B 0644
cyclone.h File 442 B 0644
delay.h File 1.7 KB 0644
device.h File 323 B 0644
div64.h File 31 B 0644
dma-mapping.h File 1.17 KB 0644
dma.h File 466 B 0644
dmi.h File 343 B 0644
early_ioremap.h File 428 B 0644
elf.h File 9.83 KB 0644
emergency-restart.h File 149 B 0644
esi.h File 887 B 0644
exception.h File 1.13 KB 0644
export.h File 115 B 0644
extable.h File 330 B 0644
fb.h File 569 B 0644
fpswa.h File 1.88 KB 0644
ftrace.h File 748 B 0644
futex.h File 2.56 KB 0644
gcc_intrin.h File 368 B 0644
hardirq.h File 564 B 0644
hpsim.h File 364 B 0644
hugetlb.h File 1.67 KB 0644
hw_irq.h File 6.33 KB 0644
idle.h File 200 B 0644
intrinsics.h File 306 B 0644
io.h File 11.77 KB 0644
iommu.h File 555 B 0644
iommu_table.h File 175 B 0644
iosapic.h File 3.16 KB 0644
irq.h File 1.02 KB 0644
irq_regs.h File 34 B 0644
irq_remapping.h File 142 B 0644
irqflags.h File 2.11 KB 0644
kdebug.h File 1.64 KB 0644
kexec.h File 1.57 KB 0644
kmap_types.h File 260 B 0644
kprobes.h File 3.82 KB 0644
kregs.h File 6.73 KB 0644
libata-portmap.h File 225 B 0644
linkage.h File 398 B 0644
local.h File 31 B 0644
local64.h File 33 B 0644
machvec.h File 12.1 KB 0644
machvec_dig.h File 449 B 0644
machvec_dig_vtd.h File 558 B 0644
machvec_hpsim.h File 544 B 0644
machvec_hpzx1.h File 544 B 0644
machvec_hpzx1_swiotlb.h File 632 B 0644
machvec_init.h File 1.33 KB 0644
machvec_sn2.h File 4.71 KB 0644
machvec_uv.h File 684 B 0644
mca.h File 5.91 KB 0644
mca_asm.h File 7.18 KB 0644
meminit.h File 2.24 KB 0644
mman.h File 432 B 0644
mmu.h File 374 B 0644
mmu_context.h File 5.29 KB 0644
mmzone.h File 1.1 KB 0644
module.h File 1.1 KB 0644
msidef.h File 1.4 KB 0644
nodedata.h File 1.85 KB 0644
numa.h File 2.18 KB 0644
page.h File 6.49 KB 0644
pal.h File 53.39 KB 0644
param.h File 439 B 0644
parport.h File 534 B 0644
patch.h File 1.19 KB 0644
pci.h File 2.83 KB 0644
percpu.h File 1.32 KB 0644
perfmon.h File 4.33 KB 0644
pgalloc.h File 2.84 KB 0644
pgtable.h File 20.92 KB 0644
processor.h File 17.98 KB 0644
ptrace.h File 5.2 KB 0644
rwsem.h File 3.82 KB 0644
sal.h File 26.51 KB 0644
sections.h File 1.35 KB 0644
segment.h File 162 B 0644
serial.h File 446 B 0644
shmparam.h File 445 B 0644
signal.h File 749 B 0644
smp.h File 3.21 KB 0644
sparsemem.h File 621 B 0644
spinlock.h File 6.92 KB 0644
spinlock_types.h File 475 B 0644
string.h File 659 B 0644
swiotlb.h File 344 B 0644
switch_to.h File 2.89 KB 0644
syscall.h File 2.06 KB 0644
termios.h File 1.88 KB 0644
thread_info.h File 4.66 KB 0644
timex.h File 1.47 KB 0644
tlb.h File 8.42 KB 0644
tlbflush.h File 2.33 KB 0644
topology.h File 1.58 KB 0644
types.h File 828 B 0644
uaccess.h File 9.86 KB 0644
unaligned.h File 337 B 0644
uncached.h File 463 B 0644
unistd.h File 1.45 KB 0644
unwind.h File 5.74 KB 0644
user.h File 2.25 KB 0644
ustack.h File 403 B 0644
vga.h File 657 B 0644
xor.h File 1.12 KB 0644