Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 414 Preliminary  2015 Microchip Technology Inc.
26.2 Crypto Engine Buffer Descriptors
Host software creates a linked list of buffer descriptors
and the hardware updates them.
Table 26-3 provides a
list of the Crypto Engine buffer descriptors, followed by
format descriptions of each buffer descriptor (see
Figure 26-2 through Figure 26-9).
TABLE 26-3: CRYPTO ENGINE BUFFER DESCRIPTORS
Name (see Note 1)
Bit
31/2315/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
BD_CTRL 31:24 DESC_EN — CRY_MODE<2:0> — — —
23:16 — SA_FETCH_EN — — LAST_BD LIFM PKT_INT_EN CBD_INT_EN
15:8 BD_BUFLEN<15:8>
7:0 BD_BUFLEN<7:0>
BD_SA_ADDR 31:24 BD_SAADDR<31:24>
23:16 BD_SAADDR<23:16>
15:8 BD_SAADDR<15:8>
7:0 BD_SAADR<7:0>
BD_SCRADDR 31:24 BD_SRCADDR<31:24>
23:16 BD_SRCADDR<23:16>
15:8 BD_SRCADDR<15:8>
7:0 BD_SRCADDR<7:0>
BD_DSTADDR 31:24 BD_DSTADDR<31:24>
23:16 BD_DSTADDR<23:16>
15:8 BD_DSTADDR<15:8>
7:0 BD_DSTADDR<7:0>
BD_NXTPTR 31:24 BD_NXTADDR<31:24>
23:16 BD_NXTADDR<23:16>
15:8 BD_NXTADDR<15:8>
7:0 BD_NXTADDR<7:0>
BD_UPDPTR 31:24 BD_UPDADDR<31:24>
23:16 BD_UPDADDR<23:16>
15:8 BD_UPDADDR<15:8>
7:0 BD_UPDADDR<7:0>
BD_MSG_LEN 31:24 MSG_LENGTH<31:24>
23:16 MSG_LENGTH<23:16>
15:8 MSG_LENGTH<15:8>
7:0 MSG_LENGTH<7:0>
BD_ENC_OFF 31:24 ENCR_OFFSET<31:24>
23:16 ENCR_OFFSET<23:16>
15:8 ENCR_OFFSET<15:8>
7:0 ENCR_OFFSET<7:0>
Note 1: The buffer descriptor must be allocated in memory on a 64-bit boundary.