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Add Transparent Translation management, read_physical()

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This commit is contained in:
Laurent Vivier 2004-03-05 23:56:42 +00:00
parent 17077b6210
commit 123afc45d4
1 changed files with 75 additions and 20 deletions
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95
second/MMU040.c
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@ -28,10 +28,13 @@
#define GET_TD_4K_ADDR(TD) (TD & 0xFFFFFF00)
#define GET_TD_8K_ADDR(TD) (TD & 0xFFFFFF80)
#define TRACE_MMU
#define GET_TT_ENABLE(TT) (TT & 0x8000)
#define GET_TT_BASE(TT) ( (TT >> 24) & 0xFF )
#define GET_TT_MASK(TT) ( (TT >> 16) & 0xFF )
#ifdef TRACE_MMU
#define TRACE(format, args...) if (MMU_trace) printf(format, ##args)
static int MMU_trace = 1;
static int MMU_trace = 0;
void MMU040_set_trace(int enable)
{
MMU_trace = enable;
@ -40,14 +43,59 @@ void MMU040_set_trace(int enable)
#define TRACE(format, args...)
#endif
static int isTTSegment(unsigned long addr)
{
unsigned long DTT0;
unsigned long DTT1;
unsigned long base;
unsigned long mask;
unsigned long size;
addr >>= 24;
MMU040_get_DTT0(&DTT0);
if (GET_TT_ENABLE(DTT0))
{
mask = GET_TT_MASK(DTT0);
base = GET_TT_BASE(DTT0);
base &= ~mask;
addr &= ~mask;
size = (mask << 24) || 0x00FFFFFF;
if ( (base <= addr) && (addr <= base + size) )
return 1;
}
MMU040_get_DTT1(&DTT1);
if (GET_TT_ENABLE(DTT1))
{
mask = GET_TT_MASK(DTT1);
base = GET_TT_BASE(DTT1);
base &= ~mask;
addr &= ~mask;
size = (mask << 24) || 0x00FFFFFF;
if ( (base <= addr) && (addr <= base + size) )
return 1;
}
/* if come here : no Transparent Translation */
return 0;
}
int MMU040_logical2physicalAttr(unsigned long logicalAddr, unsigned long *physicalAddr, unsigned long *attr)
{
int rootIndex;
int ptrIndex;
int pageIndex;
unsigned long TC;
unsigned long *rootTable, *ptrTable, *pageTable, *pageAddr;
unsigned long pAttr;
unsigned long rootTable, ptrTable, pageTable;
unsigned long rootEntry, tableEntry, pageEntry;
TRACE("logical: %08lx ", logicalAddr);
@ -56,6 +104,12 @@ int MMU040_logical2physicalAttr(unsigned long logicalAddr, unsigned long *physic
TRACE("TC: %08lx\n", TC);
if ( !GET_TC_ENABLE(TC) || isTTSegment(logicalAddr) )
{
*physicalAddr = logicalAddr;
return 0;
}
rootIndex = (logicalAddr & 0xFE000000) >> 25;
ptrIndex = (logicalAddr & 0x01FC0000) >> 18;
pageIndex = IS_8K_PAGE(TC) ? (logicalAddr & 0x0003E000) >> 13 :
@ -64,38 +118,37 @@ int MMU040_logical2physicalAttr(unsigned long logicalAddr, unsigned long *physic
TRACE("root idx: %d ptr idx: %d page idx: %d\n", rootIndex, ptrIndex,
pageIndex);
MMU040_get_SRP((unsigned long*)&rootTable);
TRACE("SRP: %p\n", rootTable);
MMU040_get_SRP(&rootTable);
TRACE("SRP: %ld\n", rootTable);
rootEntry = MMU040_read_phys(rootTable + 4 * rootIndex);
TRACE("Root Entry: %08lx\n", rootEntry);
rootEntry = rootTable[rootIndex];
if (UDT_IS_INVALID(rootEntry))
{
return -1;
}
TRACE("Root Entry: %08lx\n", rootEntry);
ptrTable = (unsigned long*)GET_RP_ADDR(rootEntry);
tableEntry = ptrTable[ptrIndex];
ptrTable = GET_RP_ADDR(rootEntry);
tableEntry = MMU040_read_phys(ptrTable + 4 * ptrIndex);
TRACE("table Entry: %08lx\n", tableEntry);
if (UDT_IS_INVALID(tableEntry))
{
return -1;
}
TRACE("table Entry: %08lx\n", tableEntry);
pageTable = (unsigned long*) ( IS_8K_PAGE(TC) ?
GET_TD_8K_ADDR(tableEntry) :
pageTable = ( IS_8K_PAGE(TC) ? GET_TD_8K_ADDR(tableEntry) :
GET_TD_4K_ADDR(tableEntry) );
pageEntry = pageTable[pageIndex];
pageEntry = MMU040_read_phys(pageTable + 4 * pageIndex);
if (IS_8K_PAGE(TC))
pageAddr = (unsigned long *) (pageEntry & 0xFFFFE000);
*physicalAddr = pageEntry & 0xFFFFE000;
else
pageAddr = (unsigned long *) (pageEntry & 0xFFFFF000);
*physicalAddr = pageEntry & 0xFFFFF000;
pAttr = pageEntry & 0x000004FF;
*physicalAddr = (unsigned long)pageAddr;
*attr = pAttr;
*attr = pageEntry & 0x000004FF;
TRACE("physical: %08lx\n", *physicalAddr);
@ -115,5 +168,7 @@ unsigned long MMU040_get_page_size(void)
MMU040_get_TC(&TC);
TRACE("Page Size: %d\n", GET_TC_PAGE_SIZE(TC));
return GET_TC_PAGE_SIZE(TC);
}