Release 4.18 arch/powerpc/include/asm/page_64.h

#ifndef _ASM_POWERPC_PAGE_64_H

#define _ASM_POWERPC_PAGE_64_H

/*
 * Copyright (C) 2001 PPC64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
 * specific, every notion of page number shared with the firmware, TCEs,
 * iommu, etc... still uses a page size of 4K.
 */

#define HW_PAGE_SHIFT		12

#define HW_PAGE_SIZE		(ASM_CONST(1) << HW_PAGE_SHIFT)

#define HW_PAGE_MASK		(~(HW_PAGE_SIZE-1))

/*
 * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
 * HW_PAGE_SHIFT, that is 4K pages.
 */

#define PAGE_FACTOR		(PAGE_SHIFT - HW_PAGE_SHIFT)

/* Segment size; normal 256M segments */

#define SID_SHIFT		28

#define SID_MASK		ASM_CONST(0xfffffffff)

#define ESID_MASK		0xfffffffff0000000UL

#define GET_ESID(x)		(((x) >> SID_SHIFT) & SID_MASK)

/* 1T segments */

#define SID_SHIFT_1T		40

#define SID_MASK_1T		0xffffffUL

#define ESID_MASK_1T		0xffffff0000000000UL

#define GET_ESID_1T(x)		(((x) >> SID_SHIFT_1T) & SID_MASK_1T)

#ifndef __ASSEMBLY__
#include <asm/cache.h>


typedef unsigned long pte_basic_t;



static inline void clear_page(void *addr)
{
	unsigned long iterations;
	unsigned long onex, twox, fourx, eightx;

	iterations = ppc64_caches.l1d.blocks_per_page / 8;

	/*
         * Some verisions of gcc use multiply instructions to
         * calculate the offsets so lets give it a hand to
         * do better.
         */
	onex = ppc64_caches.l1d.block_size;
	twox = onex << 1;
	fourx = onex << 2;
	eightx = onex << 3;

	asm volatile(
        "mtctr  %1      # clear_page\n\
        .balign 16\n\
1:      dcbz    0,%0\n\
        dcbz    %3,%0\n\
        dcbz    %4,%0\n\
        dcbz    %5,%0\n\
        dcbz    %6,%0\n\
        dcbz    %7,%0\n\
        dcbz    %8,%0\n\
        dcbz    %9,%0\n\
        add     %0,%0,%10\n\
        bdnz+   1b"
        : "=&r" (addr)
        : "r" (iterations), "0" (addr), "b" (onex), "b" (twox),
                "b" (twox+onex), "b" (fourx), "b" (fourx+onex),
                "b" (twox+fourx), "b" (eightx-onex), "r" (eightx)
        : "ctr", "memory");
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Anton Blanchard
37
56.92%
1
33.33%
Michael Ellerman
22
33.85%
1
33.33%
Benjamin Herrenschmidt
6
9.23%
1
33.33%
Total
65
100.00%
3
100.00%

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

/* Log 2 of page table size */
extern u64 ppc64_pft_size;

#endif /* __ASSEMBLY__ */


#define VM_DATA_DEFAULT_FLAGS \
	(is_32bit_task() ? \
         VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)

/*
 * This is the default if a program doesn't have a PT_GNU_STACK
 * program header entry. The PPC64 ELF ABI has a non executable stack
 * stack by default, so in the absence of a PT_GNU_STACK program header
 * we turn execute permission off.
 */

#define VM_STACK_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
                                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)


#define VM_STACK_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
                                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)


#define VM_STACK_DEFAULT_FLAGS \
	(is_32bit_task() ? \
         VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)

#include <asm-generic/getorder.h>

#endif /* _ASM_POWERPC_PAGE_64_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Michael Ellerman
117
62.57%
1
11.11%
Anton Blanchard
38
20.32%
2
22.22%
Paul Mackerras
21
11.23%
1
11.11%
Benjamin Herrenschmidt
6
3.21%
1
11.11%
Denis Kirjanov
2
1.07%
1
11.11%
Lucas De Marchi
1
0.53%
1
11.11%
Arnd Bergmann
1
0.53%
1
11.11%
Stephen Rothwell
1
0.53%
1
11.11%
Total
187
100.00%
9
100.00%
Directory: arch/powerpc/include/asm

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