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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUXKPI_LINUX_PAGE_H_
#define _LINUXKPI_LINUX_PAGE_H_
#include <linux/types.h>
#include <sys/param.h>
#include <sys/vmmeter.h>
#include <machine/atomic.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/pmap.h>
#if defined(__i386__) || defined(__amd64__)
#include <machine/md_var.h>
#endif
typedef unsigned long linux_pte_t;
typedef unsigned long linux_pmd_t;
typedef unsigned long linux_pgd_t;
typedef unsigned long pgprot_t;
#define page vm_page
#define LINUXKPI_PROT_VALID (1 << 3)
#define LINUXKPI_CACHE_MODE_SHIFT 4
CTASSERT((VM_PROT_ALL & -LINUXKPI_PROT_VALID) == 0);
#define PAGE_KERNEL_IO 0x0000
static inline pgprot_t
cachemode2protval(vm_memattr_t attr)
{
return ((attr << LINUXKPI_CACHE_MODE_SHIFT) | LINUXKPI_PROT_VALID);
}
static inline vm_memattr_t
pgprot2cachemode(pgprot_t prot)
{
if (prot & LINUXKPI_PROT_VALID)
return (prot >> LINUXKPI_CACHE_MODE_SHIFT);
else
return (VM_MEMATTR_DEFAULT);
}
#define page_to_virt(page) linux_page_address(page)
#define virt_to_page(x) PHYS_TO_VM_PAGE(vtophys(x))
#define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT)
#define pfn_to_page(pfn) (PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT))
#define nth_page(page,n) pfn_to_page(page_to_pfn(page) + (n))
#define page_to_phys(page) VM_PAGE_TO_PHYS(page)
#define clear_page(page) memset(page, 0, PAGE_SIZE)
#define pgprot_noncached(prot) \
(((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_UNCACHEABLE))
#ifdef VM_MEMATTR_WRITE_COMBINING
#define pgprot_writecombine(prot) \
(((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_WRITE_COMBINING))
#else
#define pgprot_writecombine(prot) pgprot_noncached(prot)
#endif
#undef PAGE_MASK
#define PAGE_MASK (~(PAGE_SIZE-1))
/*
* Modifying PAGE_MASK in the above way breaks trunc_page, round_page,
* and btoc macros. Therefore, redefine them in a way that makes sense
* so the LinuxKPI consumers don't get totally broken behavior.
*/
#undef btoc
#define btoc(x) (((vm_offset_t)(x) + PAGE_SIZE - 1) >> PAGE_SHIFT)
#undef round_page
#define round_page(x) ((((uintptr_t)(x)) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
#undef trunc_page
#define trunc_page(x) ((uintptr_t)(x) & ~(PAGE_SIZE - 1))
#if defined(__i386__) || defined(__amd64__)
#undef clflush
#undef clflushopt
static inline void
lkpi_clflushopt(unsigned long addr)
{
if (cpu_stdext_feature & CPUID_STDEXT_CLFLUSHOPT)
clflushopt(addr);
else if (cpu_feature & CPUID_CLFSH)
clflush(addr);
else
pmap_invalidate_cache();
}
#define clflush(x) clflush((unsigned long)(x))
#define clflushopt(x) lkpi_clflushopt((unsigned long)(x))
static inline void
clflush_cache_range(void *addr, unsigned int size)
{
pmap_force_invalidate_cache_range((vm_offset_t)addr,
(vm_offset_t)addr + size);
}
#endif
#endif /* _LINUXKPI_LINUX_PAGE_H_ */
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