Artesyn MVME6100 Single Board Computer Installation and Us User Manual download pdf (Page 58)

MOTLoad Firmware

MVME6100 Single Board Computer Installation and Use (6806800D58H)

 DONT_AUTO_RUN

If set, this flag indicates that the image is not to be selected for automatic execution. A

user, through the interactive command facility, may specify the image to be executed.

3.10.3 User Images

These images are user-developer boot code; for example, a VxWorks bootrom image. Such

images may expect the system software state to be as follows upon entry:

 The MMU is disabled.

 L1 instruction cache has been initialized and is enabled.

 L1 data cache has been initialized (invalidated) and is disabled.

 L2 cache is disabled.

 L3 cache is disabled.

 RAM has been initialized and is mapped starting at CPU address 0.

 If RAM ECC or parity is supported, RAM has been scrubbed of ECC or parity errors.

 The active Flash bank (boot) is mapped from the upper end of the address space.

 If specified by COPY_TO_RAM, the image has been copied to RAM at the address specified

by ImageRamAddress.

 CPU register R1 (the stack pointer) has been initialized to a value near the end of RAM.

 CPU register R3 is added to the following structure:

typedef struct altBootData {

unsigned int ramSize;/* board's RAM size in MB */

void flashPtr;/* ptr to this image in flash */

char boardType[16];/* name string, eg MVME6100 */

void globalData;/* 16K, zeroed, user defined */

unsigned int reserved[12];

} altBootData_t;

MOTLoad currently uses an Image Flag value of 0x3, which identifies itself as an Alternate

MOTLoad image that executes from RAM. MOTLoad currently does not support execution

from flash.

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Artesyn MVME6100 Single Board Computer Installation and Us User Manual Page 58