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Alpha 21264/EV67 Hardware Reference Manual
Internal Processor Registers 5–39
Cbox CSRs and IPRs
Table 5–25 describes the Cbox WRITE_MANY chain order from LSB to MSB.
Figure 5–37 shows an example of PALcode used to write to the WRITE_MANY chain.
Figure 5–37 WRITE_MANY Chain Write Transaction Example
;
; Initialize the Bcache configuration in the Cbox
;
; BC_ENABLE = 1
; INIT_MODE = 0
; BC_SIZE = 0xF
; INVALID_TO_DIRTY_ENABLE = 3
; ENABLE_EVICT = 1
Table 5–25 Cbox WRITE_MANY Chain Order
Cbox WRITE_MANY Chain Description For Information:
BC_ENABLE[0] Enable the Bcache Table 4–42
INIT_MODE[0] Enable initialize mode Section 7.6
BC_SIZE[3:0] Bcache size Table 4–42
BC_ENABLE Duplicate CSR Table 4–42
BC_ENABLE Duplicate CSR Table 4–42
BC_SIZE[0:3] Duplicate CSR Table 4–42
BC_ENABLE
1
1
MBZ during initialization mode; see Section 7.6 for information.
Duplicate CSR Table 4–42
BC_ENABLE
1
Duplicate CSR Table 4–42
BC_ENABLE
1
Duplicate CSR Table 4–42
INVAL_TO_DIRTY_ENABLE[1] WH64 acknowledges Table 4–15
ENABLE_EVICT Enable issue evict Table 4–1
BC_ENABLE Duplicate CSR Table 4–42
INVAL_TO_DIRTY_ENABLE[0] WH64 acknowledges Table 4–15
BC_ENABLE Duplicate CSR Table 4–42
BC_ENABLE Duplicate CSR Table 4–42
BC_ENABLE Duplicate CSR Table 4–42
SET_DIRTY_ENABLE[0] SetDirty acknowledge programming Table 4–16
INVAL_TO_DIRTY_ENABLE[0] Duplicate CSR Table 4–15
SET_DIRTY_ENABLE[2:1] SetDirty acknowledge programming Table 4–16
BC_BANK_ENABLE[0] Enable bank mode for Bcache Section 4.8.5
BC_SIZE[0:3] Duplicate CSR Table 4–42
INIT_MODE Duplicate CSR Section 7.6
BC_WRT_STS[0:3] Write status for Bcache in initialize-mode
(Valid, Dirty, Shared, Parity)
Section 7.6