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AXI 3/AXI 4 Exclusive Access
Offline
Sai Karthik Madabhushi
over 7 years ago
Note: This was originally posted on 14th June 2011 at http://forums.arm.com
Hi,
I have a query regarding Exclusive Access in AXI 3/ AXI 4. The spec does NOT say anything about this behavior, hence I need a clarification.
1. Can there be two Exclusive Reads monitoring the same address region?
ARID = 0 ARADDR = 0x004 ARSIZE = 0 ARLEN = 2
ARID = 3 ARADDR = 0x004 ARSIZE = 1 ARLEN = 1
** Lets assume the above ID's have come sequentially in subsequent cycles and NO exclusive write has come.
2. If YES, then How should the behavior of Exclusive Write be?
a. Exclusive Write of which ID should be entertained?
b. Should we stop monitoring the OTHER ID when the exclusive write for ONE ID arrives?
3. In case of a successful Exclusive Write, is there a compulsion for the slave to send EXOKAY?
a. Can it also send SLVERR, or DECERR?
Regards,
Sai Karthik
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