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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/kernel/segmentmgr.C $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2011
//
// p1
//
// Object Code Only (OCO) source materials
// Licensed Internal Code Source Materials
// IBM HostBoot Licensed Internal Code
//
// The source code for this program is not published or other-
// wise divested of its trade secrets, irrespective of what has
// been deposited with the U.S. Copyright Office.
//
// Origin: 30
//
// IBM_PROLOG_END
#include <assert.h>
#include <errno.h>
#include <arch/ppc.H>
#include <util/singleton.H>
#include <kernel/segmentmgr.H>
#include <kernel/segment.H>
bool SegmentManager::handlePageFault(task_t* i_task, uint64_t i_addr)
{
return Singleton<SegmentManager>::instance().
_handlePageFault(i_task, i_addr);
}
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);
}
bool SegmentManager::_handlePageFault(task_t* i_task, uint64_t i_addr)
{
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);
}
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 )
{
// This constant should come from page manager. Segment size.
const size_t SLBE_s = 40;
// Get segment ID from effective address.
size_t segId = i_vaddr >> SLBE_s;
// 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 );
}
}
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