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SH7708 bảng dữ liệu(PDF) 82 Page - Renesas Technology Corp

tên linh kiện SH7708
Giải thích chi tiết về linh kiện  SuperH??RISC engine
PDF  633 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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SH7708 bảng dữ liệu(HTML) 82 Page - Renesas Technology Corp

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64
The sharing information (SH) determines whether the PTEH.ASID and the ASID in the TLB entry
are compared. ASIDs are compared when there is no sharing between processes (SH = 0) but not
when there is sharing (SH = 1).
When single virtual memory is supported (MMUCR.SV = 1) and privileged mode is engaged
(SR.MD = 1), all process resources can be accessed. This means that ASIDs are not compared
when single virtual memory is supported and privileged mode is engaged. The objects of address
comparison are shown in figure 3.8.
Bits compared:
VPN (31–17)
VPN (11–10)
SZ = 0?
Yes
No
Yes (1 kbyte)
No (4 kbytes)
Bits compared:
VPN (31–17)
Bits compared:
VPN (31–17)
VPN (11–10)
ASID (7–0)
SZ = 0?
Yes (1 kbyte)
No (4 kbytes)
Bits compared:
VPN (31–17)
ASID (7–0)
SH = 1 or
(SR.MD = 1 and
MMUCR.SV = 1)?
Figure 3.8 Objects of Address Comparison



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