MC68030FE16C Freescale Semiconductor, MC68030FE16C Datasheet - Page 381
MC68030FE16C
Manufacturer Part Number
MC68030FE16C
Description
IC MPU 32BIT ENHANCED 132-CQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68030FE20C.pdf
(599 pages)
Specifications of MC68030FE16C
Processor Type
M680x0 32-Bit
Speed
166MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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Quantity
Price
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Part Number:
MC68030FE16C
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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/* Block not found so find upper level entry unallocated and call SearchPageTable that will 'expand' */
/* Scan table pointed to by upper level index to see if it can hold the block. If not, see if it can be
/* be expanded. If successful then set flags in the page entries, set status to "OK" and User's
/* virtual address
Status = "Out of virtual Memory";
/* Scan User eligible page tables
for Upper_Table_Index = 1 to 31 do
/* the null table to hold the block.
for Upper_Table_Index = 1 to 31
/* No more virtual space, exit leaving Status = "out of virtual memory"
Declare NumPages;
if SizelnBytes > 16 megabytes then exit Vallocate;
NumPages = (SizelnBytes+PageSize-1)/PageSize;
exit Vallocate;
Declare Upper_Table Index, Lower Level_Index;
Procedure SearchPageTable;
Declare Maxfound;
Maxfound = 0;
For Lower_Level_Index = 0 to UppeLTable[].Lim]LField
If Upper_Table[].Status = allocated then call SearchPageTable;
If Status = "OK" then Exit Vallocate;
end;
]f Upper_Table[].Status = unallocated then call
/* count consecutive free pages until Maxfound met or not
If Lower_Table[].Status = invalid_unallocated then do
if Maxfound >= NumPages then do
Maxfound = Maxfound+l;
MC68030 USER'S M A N U A L
SearchPageTable;
/* number of pages required to hold request
/* default result status to this error
/* Pages needed
/*table indexes
/* Count of consecutive free blocks found
M O T O R O L A
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
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