DPU Boot ROM Program

The DPU boot ROM program operates as described in Reference 3 with the addition of the following features for supporting the TPU. In addition to the common boot telemetry, the CRISP DPU boot program also generates TPU memory dump packets and TPU memory checksum subpackets. In addition to the common boot commands, the CRISP DPU boot program accepts the following TPU commands:

CRS_TPU_MEM_CHECK, CRS_TPU_MEM_COPY, CRS_TPU_MEM_LOAD, CRS_TPU_MEM_READ, CRS_TPU_MEM_READ_ABT, and CRS_TPU_MEM_RUN
CRS_TPU_TLM_FLUSH and CRS_TPU_TLM_FLUSH_AUTO
CRS_TPU_ROM_BOOT and CRS_TPU_ROM_GO (see below)

CRS_TPU_ROM_BOOT - Boot Default TPU Program

Boot the default TPU program from EEPROM (address = 0x9d000000). See CRS_TPU_ROM_GO below.

Name	Length (bits)	Value	Description
Opcode	16	0x015f
Macro?	1	0 = Execute 1 = Append to macro	Macro load bit
Length	15	2	Command length in 32-bit words
Checksum	32		32 bit XOR

CRS_TPU_ROM_GO - Boot a Selected TPU Program

Boot a TPU program. The address identifies a boot header (described below). The program must either execute very quickly (so as not to hold up the command handler) or take over completely.

Name	Length (bits)	Value	Description
Opcode	16	0x0160
Macro?	1	0 = Execute 1 = Append to macro	Macro load bit
Length	15	3	Command length in 32-bit words
Address	32	Unsigned integer	Program header address
Checksum	32		32 bit XOR

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