pdt (SDM)

Displays one or more entries from a page table, which points to memory pages holding a flat-model application's code and data. for the meaning of each entry in the display, see the description of the .component parameter.

See also

Paging information in the user's manual or programmer's reference for your microprocessor.

[count] pdt [(index) [.component]] physical_base

Parameters

count

A decimal number specifying how many entries from the page table to display. If you don't specify count or (index), the default is to display a screen full of entries until you type Q to quit. You can increment the display one screen at a time by typing <Space>, or one line at a time by typing <CR>. If you don't specify count but do specify (index), the default value for count is 1.

(index)

The index into the table to begin the display. For example, assume that the page table's base address is 25A000H. To display 5 entries beginning with entry 10, you would enter:

5pdt(10t) 25a000

.component

To display only a single component of a specific directory entry, after the (index) enter a period (.) followed by one of these component abbreviations:

`ADDR`	Base address of the page.
`AV`	Available bits for use by the OS.
`D`	Dirty bit: 1 means memory in the page has been written.
`A`	Accessed bit: 1 means read or write to the page.
`PCD`	Page-level Cache Disable bit: 1 means caching is disabled.
`PWT`	Page-level WriteThrough bit: 1 is writethrough, 0 is writeback.
`U`	User/Supervisor bit: 1 is application code and data, 0 is OS memory.
`W`	Read/Write bit: 1 is read/write, 0 is read-only.
`P`	Present bit: 1 means the page is present in memory.

physical_base

The base address of the page table, as displayed by the pdd command.

Examples

Assume that a pdd command displayed the base address of a page table as 00276000. To get information about the memory pages in that page table, use the following command:

..pdt 276000
PTBL(0T) ADDR=00c00000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
PTBL(1T) ADDR=00c01000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
PTBL(2T) ADDR=00c02000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
PTBL(3T) ADDR=00c03000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
PTBL(4T) ADDR=00c04000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
PTBL(5T) ADDR=00c05000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
   .
   .
   .
PTBL(21T) ADDR=00c15000 AV=0 D=0 A=0 PCD=0 PWT=0 U=1 W=1 P=1
                          Enter <Space> or <CR> or Quit -

To get just the base address of the 6th page (index 5) in that page table, use the following command.
```
..pdt(5t).addr 276000
ADDR=00c05000
```

Parameters

Examples

See Also