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Spinlock
17.2.1.9 LOCK_REG_5 Register (offset = 814h) [reset = 0h]
LOCK_REG_5 is shown in Figure 17-53 and described in Table 17-66.
This register is read when attempting to acquire a lock. The lock is automatically taken if it was not taken
and the value returned by the read is zero. If the lock was already taken, then the read returns one.
Writing a zero to this register frees the lock.
Figure 17-53. LOCK_REG_5 Register
31 30 29 28 27 26 25 24
Reserved
R-0h
23 22 21 20 19 18 17 16
Reserved
R-0h
15 14 13 12 11 10 9 8
Reserved
R-0h
7 6 5 4 3 2 1 0
Reserved TAKEN
R-0h R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 17-66. LOCK_REG_5 Register Field Descriptions
Bit Field Type Reset Description
31-1 Reserved R 0h
0 TAKEN R/W 0h
3317
SPRUH73H–October 2011–Revised April 2013 Interprocessor Communication
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