diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/netbsd/alloc-r0drv-netbsd.c')
| -rw-r--r-- | src/VBox/Runtime/r0drv/netbsd/alloc-r0drv-netbsd.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/netbsd/alloc-r0drv-netbsd.c b/src/VBox/Runtime/r0drv/netbsd/alloc-r0drv-netbsd.c new file mode 100644 index 00000000..ad067c11 --- /dev/null +++ b/src/VBox/Runtime/r0drv/netbsd/alloc-r0drv-netbsd.c @@ -0,0 +1,166 @@ +/* $Id: alloc-r0drv-netbsd.c $ */ +/** @file + * IPRT - Memory Allocation, Ring-0 Driver, NetBSD. + */ + +/* + * Copyright (C) 2014-2020 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; +} |