mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 04:35:17 +07:00
2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _ASM_POWERPC_PAGE_64_H
|
|
#define _ASM_POWERPC_PAGE_64_H
|
|
|
|
/*
|
|
* Copyright (C) 2001 PPC64 Team, IBM Corp
|
|
*/
|
|
|
|
#include <asm/asm-const.h>
|
|
|
|
/*
|
|
* 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");
|
|
}
|
|
|
|
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 */
|