Public Version
Device Initialization by ROM Code
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Table 26-47. Booting Parameter Structure (continued)
Offset
Field
Size
Description
(Bytes)
0x07
CH flags
1
Configuration header sections flag. Each section is described by 1 bit. A
set bit indicates that the section was executed:
[0]: CHSETTINGS
[1]: CHRAM
[2]: CHFLASH
[3]: CHMMC
Other bits: Reserved
0x08
Device descriptor
4
Pointer to the device descriptor structure. This pointer is required when
current booting device driver functions are called.
26.4.9 Tracing
Tracing in the public ROM code consists of a 64-bit vector in which each bit corresponds to a certain point
of the ROM code execution flow. The tracing vector is divided into two 32-bit words.
lists the
location and organization of the tracing data in RAM. Tracing data is initialized at the beginning of startup.
There are two sets of tracing data: current trace information and tracing collected during the first ROM
code run after a cold reset. This cold reset tracing is copied to its location during the tracing initialization of
the second ROM code run after the cold reset run. These data can be used for debugging.
Table 26-48. Tracing Vector
Bit Number
Group
Meaning
0
General
Reset
1
General
ROM code C main
2
General
ROM code runs after the cold reset
3
Boot
Booting started
4
Memory boot
Memory booting started
5
Boot
No more booting device to check
6
Peripheral boot
Peripheral booting started
7
Boot
Booting message change booting device
8
Boot
Booting message skip per. booting
9
Reserved
Reserved
10
Memory boot
CH found
11
Memory boot
Image header correct
12
Peripheral boot
Device initialized
13
Peripheral boot
ASIC-ID sent
14
Peripheral boot
Booting message received
15
Peripheral boot
Image received
16
Peripheral boot
Peripheral booting failed
17
Peripheral boot
UART
18
Peripheral boot
USB
19
Reserved
Reserved
20
Reserved
Reserved
21
Peripheral boot
NULL device
22
Execute
Image executed
23
Reserved
Reserved for non-GP devices
24
Reserved
Reserved for non-GP devices
25
Reserved
Reserved for non-GP devices
26
Reserved
Reserved for non-GP devices
3576Initialization
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated