7e9f73f3ed
WB (write-back) on x86 via control bits in PTEs and PDEs (including making use of the PAT MSR). Changes include: - A new pmap_mapdev_attr() function for amd64 and i386 which takes an additional parameter (relative to pmap_mapdev()) specifying the cache mode for this mapping. Note that on amd64 only WB mappings are done with the direct map, all other modes result in a private mapping. - pmap_mapdev() on i386 and amd64 now defaults to using UC (uncached) mappings rather than WB. Previously we relied on the BIOS setting up MTRR's to enforce memio regions being treated as UC. This might make hw.cbb_start_memory unnecessary in some cases now for example. - A new pmap_mapbios()/pmap_unmapbios() API has been added to allow places that used pmap_mapdev() to map non-device memory (such as ACPI tables) to do so using WB as before. - A new pmap_change_attr() function for amd64 and i386 that changes the caching mode for a range of KVA. Reviewed by: alc
158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
/*-
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* Copyright (c) 2000 Mitsaru Iwasaki
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 6.2 : Memory Management
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <contrib/dev/acpica/acpi.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
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void *
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AcpiOsAllocate(ACPI_SIZE Size)
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{
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return (malloc(Size, M_ACPICA, M_NOWAIT));
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}
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void
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AcpiOsFree(void *Memory)
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{
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free(Memory, M_ACPICA);
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}
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ACPI_STATUS
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AcpiOsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_SIZE Length,
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void **LogicalAddress)
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{
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*LogicalAddress = pmap_mapbios((vm_offset_t)PhysicalAddress, Length);
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if (*LogicalAddress == NULL)
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return (AE_BAD_ADDRESS);
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return (AE_OK);
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}
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void
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AcpiOsUnmapMemory(void *LogicalAddress, ACPI_SIZE Length)
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{
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pmap_unmapbios((vm_offset_t)LogicalAddress, Length);
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}
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ACPI_STATUS
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AcpiOsGetPhysicalAddress(void *LogicalAddress,
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ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
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{
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/* We can't necessarily do this, so cop out. */
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return (AE_BAD_ADDRESS);
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}
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/*
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* There is no clean way to do this. We make the charitable assumption
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* that callers will not pass garbage to us.
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*/
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BOOLEAN
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AcpiOsReadable (void *Pointer, ACPI_SIZE Length)
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{
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return (TRUE);
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}
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BOOLEAN
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AcpiOsWritable (void *Pointer, ACPI_SIZE Length)
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{
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return (TRUE);
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}
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ACPI_STATUS
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AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
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{
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void *LogicalAddress;
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if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
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return (AE_NOT_EXIST);
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switch (Width) {
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case 8:
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*(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
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break;
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case 16:
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*(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
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break;
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case 32:
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*(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
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break;
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case 64:
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*(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
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break;
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default:
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/* debug trap goes here */
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break;
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}
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AcpiOsUnmapMemory(LogicalAddress, Width / 8);
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
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{
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void *LogicalAddress;
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if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK)
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return (AE_NOT_EXIST);
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switch (Width) {
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case 8:
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(*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
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break;
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case 16:
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(*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
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break;
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case 32:
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(*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
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break;
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case 64:
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(*(volatile u_int64_t *)LogicalAddress) = Value;
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break;
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default:
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/* debug trap goes here */
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break;
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}
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AcpiOsUnmapMemory(LogicalAddress, Width / 8);
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return (AE_OK);
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}
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