c_mt

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

mt 	The mt command executes the memory test.

Format The format for this command is:

mt [-c] [[ addr] size]

where:

-c 	implements a continuous test.

addr 	is the base address from which to perform the memory test.

size 	is the number of bytes, in hexadecimal, on which to execute the memory test.

Entering this command with no parameters tests all memory.

Functional
Description

The mt command tests the available memory. By default, this command tests
the memory at 0xA002.0000 to 0xA00F.FFFF.

If size is specified, then only that number of bytes are tested. If addr is also
specified, then testing starts at the specified address.

Both addrand size are rounded down to the nearest word address. If the user
specifies a size of zero, the test executes on the entire memory and does not
terminate.

The mt memory test is not an exhaustive test. In the mt test, a single 憫walking
one拻 is written to each word and cleared in turn. Then, to test other bits in
the word, each word is loaded with its own address and then read back.

Because this test writes an exclusive value to every word, it is sufficient to
find most stuck-at faults and shorts. How ever, this test is not adequate to find
pattern sensitivity and leakage faults.

Examples illustrating the use of the mt command follow.

PMON> mt 		Test from 0xA002.0000 to 0xA00F.FFFF.
PMON> mt 2000 		Test 8 Kbytes starting at 0xA002.0000.
PMON> mt a0030000 4000 	Test 16 Kbytes starting at 0xA003.0000.