28379#program INTERRUPT是什么意思

哪位能详细说明一下呢，或者说我看哪个文档能解释清楚，谢谢！

文档：SPRU514G

6.10.10 The INTERRUPT Pragma
The INTERRUPT pragma enables you to handle interrupts directly with C code. In C, the argument func is
the name of a function. In C++, the pragma applies to the next function declared.
The syntax of the pragma in C is:
#pragma INTERRUPT ( func );
The syntax of the pragma in C++ is:
#pragma INTERRUPT ;
Except for _c_int00, which is the name reserved for the system reset interrupt for C programs, the name
of the interrupt (the func argument) does not need to conform to a naming convention.
On the FPU, there are two kinds of interrupts - High Priority Interrupt (HPI) and Low Priority Interrupt (LPI).
High priority interrupts use a fast context save and cannot be nested. Low priority interrupts behave like
normal C28x interrupts and can be nested.
The kind of interrupt can be specified by way of the interrupt pragma using an optional second argument.
The C syntax of the pragma is:
#pragma INTERRUPT ( func , [HPI|LPI] );
The syntax of the pragma in C++ is:
#pragma INTERRUPT ( [HPI|LPI] );
To specify an HPI interrupt use HPI. To specify an LPI interrupt use LPI. On FPU, if no interrupt priority is
specified LPI is assumed. Interrupts specified with the interrupt keyword also default to LPI.
ERIC
                                                                         - ERIC

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请问一下您是怎么知道这个文档有这方面的介绍，或者交给我一下方法下次遇到问题时我怎么在ti的支持文档里面找到相关的说明文档呢，谢谢！