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KSZ9567R 数据表(PDF) 49 Page - Microchip Technology |
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KSZ9567R 数据表(HTML) 49 Page - Microchip Technology |
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49 / 233 page  2022 Microchip Technology Inc. and its subsidiaries DS00002329E-page 49 KSZ9567R Figure 4-8 shows basic organization of the ACL Table. The table has 16 entries, and each entry includes a matching field, action field and process field. Although these fields are stored together in one table, it is important to note that for a given table entry, the Matching, Action and Process fields generally do not form an associated group. The one excep- tion is when the Matching Rule is in Count Mode (MD = 01 and ENB = 00). In that case, the Matching and Action fields are used in tandem. 4.4.17.4 ACL Interrupts The ACL filtering functions do not generate interrupts. Interrupts apply only for the Count Mode (MD = 01, ENB = 00). The Matching Rule can be configured either to timeout if the interval between packets of a specific type (MAC address and EtherType), or when a set number of these packets are received. There is a separate interrupt for each port. Port specific interrupt status and masks are located in the Port Interrupt Status Register and Port Interrupt Mask Register. The top level interrupt registers for each port are in the Global Port Interrupt Status Register and Global Port Interrupt Mask Register. TABLE 4-21: ACL ACTION RULE PARAMETERS FOR COUNT MODE (MD = 01 OR ENB = 00) Parameter Description COUNT[10:0] Count value TU Time unit for counter. 0 = Microseconds 1 = Milliseconds CA Counter Algorithm. 0 = An 11-bit counter will be loaded with the count value from the list and start counting down every unit time. An interrupt will be generated when the timer expires, i.e. the next qualified packet has not been received within the period specified by the value. 1 = The counter is incremented with every matched packet received. An interrupt is generated when the terminal count is reached. The count resets thereafter. Time units are not used in this mode. FIGURE 4-8: ACL TABLE FORMAT F R N MD [1:0] ENB [1:0] S / D E Q MAC ADDRESS [47:0] TYPE [15:0] F R N MD [1:0] ENB [1:0] S / D E Q IP ADDRESS [31:0] IP MASK [31:0] F R N MD [1:0] ENB [1:0] S / D E Q MAX PORT [15:0] MIN PORT [15:0] Resvd (5) PC [1:0] PRO [7:0] F M E FMSK [7:0] FLAG [7:0] PM [1:0] PM [1:0] PM [1:0] P [2:0] P [2:0] P [2:0] R P E R P E R P E RP [2:0] RP [2:0] RP [2:0] MM [1:0] MM [1:0] MM [1:0] FORWARD [# ports] FORWARD [# ports] FORWARD [# ports] RULESET [15:0] RULESET [15:0] RULESET [15:0] MATCHING Rule ACTION Rule PROCESS Field PROCESS Field MD = 01 ENB = 00 MD = 10 MD = 11 F R N MD [1:0] ENB [1:0] S / D E Q MAC ADDRESS [47:0] TYPE [15:0] COUNT[10:0] TU RULESET [15:0] MD = 01 ENB != 00 CA unu sed |
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