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SMC instruction

Dm Sh over 12 years ago

Note: This was originally posted on 22nd January 2013 at http://forums.arm.com

Good day.

I have a question - where I can get the #immediate value (4bit) in Secure Monitor Exception Handler, when called SMC instruction with non zero parametr - #imm-4 ?
Don't found this value in any registers.

From ARM documentation.
-------------------------------------

SMC
Secure Monitor Call.

Syntax
SMC{cond} #imm4 where:

[i]imm4[/i]is a 4-bit immediate value. This is ignored by the ARM processor, but can be used by the SMC exception handler to determine what service is being requested.

Thanks.