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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/kernel/segmentmgr.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <assert.h>
#include <errno.h>
#include <arch/ppc.H>
#include <util/singleton.H>
#include <kernel/console.H>
#include <kernel/segmentmgr.H>
#include <kernel/segment.H>
#include <kernel/devicesegment.H>
bool SegmentManager::handlePageFault(task_t* i_task, uint64_t i_addr,
bool i_store)
{
return Singleton<SegmentManager>::instance().
_handlePageFault(i_task, i_addr, i_store);
}
void SegmentManager::addSegment(Segment* i_segment, size_t i_segId)
{
Singleton<SegmentManager>::instance()._addSegment(i_segment, i_segId);
}
void SegmentManager::initSLB()
{
Singleton<SegmentManager>::instance()._initSLB();
}
uint64_t SegmentManager::findPhysicalAddress(uint64_t i_vaddr)
{
return Singleton<SegmentManager>::instance()._findPhysicalAddress(i_vaddr);
}
void SegmentManager::updateRefCount( uint64_t i_vaddr,
PageTableManager::UsageStats_t i_stats )
{
Singleton<SegmentManager>::instance()._updateRefCount(i_vaddr,i_stats);
}
void SegmentManager::castOutPages(uint64_t i_type)
{
Singleton<SegmentManager>::instance()._castOutPages(i_type);
}
void* SegmentManager::devMap(void* ra, uint64_t i_devDataSize, bool i_nonCI,
bool i_guarded)
{
return Singleton<SegmentManager>::instance()._devMap(ra, i_devDataSize,
i_nonCI, i_guarded);
}
int SegmentManager::devUnmap(void* ea)
{
return Singleton<SegmentManager>::instance()._devUnmap(ea);
}
bool SegmentManager::_handlePageFault(task_t* i_task, uint64_t i_addr,
bool i_store)
{
size_t segId = getSegmentIdFromAddress(i_addr);
// Call contained segment object to handle page fault.
if ((segId < MAX_SEGMENTS) && (NULL != iv_segments[segId]))
{
return iv_segments[segId]->handlePageFault(i_task, i_addr, i_store);
}
return false;
}
void SegmentManager::_addSegment(Segment* i_segment, size_t i_segId)
{
kassert(i_segId < MAX_SEGMENTS);
iv_segments[i_segId] = i_segment;
}
void SegmentManager::_initSLB()
{
// Flush SLB.
asm volatile("slbia" ::: "memory");
isync(); // Ensure slbia completes prior to slbmtes.
register uint64_t slbRS, slbRB;
// Default segment descriptors.
// ESID = 0, V = 1, Index = 1.
slbRB = 0x0000000008000001;
// B = 01 (1TB), VSID = 0, Ks = 0, Kp = 1, NLCLP = 0
slbRS = 0x4000000000000400;
// Add all segments to SLB.
for (size_t i = 0; i < MAX_SEGMENTS; i++)
{
// Add segment to SLB.
if (NULL != iv_segments[i])
{
asm volatile("slbmte %0, %1" :: "r"(slbRS), "r"(slbRB) : "memory");
}
// Increment ESID, VSID, Index.
slbRB += 0x0000010000000001;
slbRS += 0x0000000001000000;
}
isync(); // Ensure slbmtes complete prior to continuing on.
}
uint64_t SegmentManager::_findPhysicalAddress(uint64_t i_vaddr) const
{
uint64_t paddr = -EFAULT;
size_t segId = getSegmentIdFromAddress(i_vaddr);
if ((segId < MAX_SEGMENTS) && (NULL != iv_segments[segId]))
{
paddr = iv_segments[segId]->findPhysicalAddress(i_vaddr);
}
return paddr;
}
void SegmentManager::_updateRefCount( uint64_t i_vaddr,
PageTableManager::UsageStats_t i_stats )
{
// Get segment ID from effective address.
size_t segId = getSegmentIdFromAddress(i_vaddr);
// Call contained segment object to update the reference count
if ((segId < MAX_SEGMENTS) && (NULL != iv_segments[segId]))
{
iv_segments[segId]->updateRefCount( i_vaddr, i_stats );
}
}
void SegmentManager::_castOutPages(uint64_t i_type)
{
for (size_t i = 0; i < MAX_SEGMENTS; i++)
{
if (NULL != iv_segments[i])
{
iv_segments[i]->castOutPages(i_type);
}
}
}
void* SegmentManager::_devMap(void* ra, uint64_t i_devDataSize, bool i_nonCI,
bool i_guarded)
{
void* ea = NULL;
for (size_t i = MMIO_FIRST_SEGMENT_ID; i <= MMIO_LAST_SEGMENT_ID; i++)
{
if (NULL == iv_segments[i]) continue;
ea = reinterpret_cast<DeviceSegment*>(iv_segments[i])->
devMap(ra, i_devDataSize, i_nonCI, i_guarded);
if (ea != NULL) break;
}
if (ea == NULL)
{
printk("SegmentManager: Ran out of device segment blocks.\n");
}
return ea;
}
int SegmentManager::_devUnmap(void* ea)
{
size_t segId = getSegmentIdFromAddress(reinterpret_cast<uint64_t>(ea));
if ((segId < MMIO_FIRST_SEGMENT_ID) ||
(segId > MMIO_LAST_SEGMENT_ID) ||
(NULL == iv_segments[segId]))
{
return -EINVAL;
}
return reinterpret_cast<DeviceSegment*>(iv_segments[segId])->devUnmap(ea);
}
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