Texas Instruments OMAP5910, Technical Reference Manual

Page: 1054 / 1209

OMAP5910 Local Bus MMU
14-109 Universal Serial Bus Host
Table 14–60. Local Bus MMU CAM Low Register
Access
Hardware
Reset
Bit Name Value Function
User Sup
Reset
Value
15–14 VA_tag_l1_L Least significant two bits of the local bus
virtual address to be used for this entry
level 1 table index.
Because the local bus MMU ignores bits
31 - 28 of the local bus virtual address,
VA_tag_l1_L correspond to bits 21 - 20 of
the 32-bit local bus virtual address used by
the USB host controller.
R/W R/W 0
13–4 VA_tag_l2 Bits of the local bus virtual address to be
used for the level 2 table index lookup
(depending on page size).
For tiny pages, bits 13:4 of this register are
compared against local bus virtual address
bits 19 - 10.
For small pages, bits 13:6 are compared
against local bus virtual address bits
19 - 12.
For large pages, bits 13:10 are compared
against local bus virtual address bits
19 - 16.
For sections, this field is ignored.
R/W R/W 0
3 P Preserved bit. When 1, CAM entry is
preserved. When 0, CAM entry is not
preserved. R/W R/W 0
2 V Valid bit. R R 0
0 CAM entry is not valid
1 CAM entry is valid
1–0 SLST Page size associated with CAM entry: R/W R/W 0
00 Section (1MB)
01 Large page (64KB)
10 Small page (4KB)
11 Tiny page (1KB)