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/* $Id: alloc-r0drv-netbsd.c $ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver, NetBSD.
*/
/*
* Copyright (C) 2014-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
* ---------------------------------------------------------------------------
*
* This code is based on:
*
* Copyright (c) 2014 Arto Huusko
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "the-netbsd-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/param.h>
#include "r0drv/alloc-r0drv.h"
DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
{
size_t cbAllocated = cb;
PRTMEMHDR pHdr = NULL;
if (fFlags & RTMEMHDR_FLAG_ZEROED)
pHdr = kmem_zalloc(cb + sizeof(RTMEMHDR), KM_NOSLEEP);
else
pHdr = kmem_alloc(cb + sizeof(RTMEMHDR), KM_NOSLEEP);
if (RT_UNLIKELY(!pHdr))
return VERR_NO_MEMORY;
pHdr->u32Magic = RTMEMHDR_MAGIC;
pHdr->fFlags = fFlags;
pHdr->cb = cbAllocated;
pHdr->cbReq = cb;
*ppHdr = pHdr;
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
{
pHdr->u32Magic += 1;
kmem_free(pHdr, pHdr->cb + sizeof(RTMEMHDR));
}
RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
{
if (pv)
{
cb = round_page(cb);
paddr_t pa;
pmap_extract(pmap_kernel(), (vaddr_t)pv, &pa);
/*
* Reconstruct pglist to free the physical pages
*/
struct pglist rlist;
TAILQ_INIT(&rlist);
for (paddr_t pa2 = pa ; pa2 < pa + cb ; pa2 += PAGE_SIZE) {
struct vm_page *page = PHYS_TO_VM_PAGE(pa2);
TAILQ_INSERT_TAIL(&rlist, page, pageq.queue);
}
/* Unmap */
pmap_kremove((vaddr_t)pv, cb);
/* Free the virtual space */
uvm_km_free(kernel_map, (vaddr_t)pv, cb, UVM_KMF_VAONLY);
/* Free the physical pages */
uvm_pglistfree(&rlist);
}
}
RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
{
/*
* Validate input.
*/
AssertPtr(pPhys);
Assert(cb > 0);
cb = round_page(cb);
vaddr_t virt = uvm_km_alloc(kernel_map, cb, 0,
UVM_KMF_VAONLY | UVM_KMF_WAITVA | UVM_KMF_CANFAIL);
if (virt == 0)
return NULL;
struct pglist rlist;
if (uvm_pglistalloc(cb, 0, (paddr_t)0xFFFFFFFF,
PAGE_SIZE, 0, &rlist, 1, 1) != 0)
{
uvm_km_free(kernel_map, virt, cb, UVM_KMF_VAONLY);
return NULL;
}
struct vm_page *page;
vaddr_t virt2 = virt;
TAILQ_FOREACH(page, &rlist, pageq.queue)
{
pmap_kenter_pa(virt2, VM_PAGE_TO_PHYS(page),
VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 0);
virt2 += PAGE_SIZE;
}
page = TAILQ_FIRST(&rlist);
*pPhys = VM_PAGE_TO_PHYS(page);
return (void *)virt;
}
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