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CS5535 数据表(PDF) 70 Page - National Semiconductor (TI) |
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CS5535 数据表(HTML) 70 Page - National Semiconductor (TI) |
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70 / 555 page  www.national.com 70 Revision 0.8 Global Concepts and Features (Continued) SSMIs are primarily used for hardware emulation and extension. From the perspective of the code on which the trap occurred, everything is normal and done in hardware. However, VSA code generally performs a number of opera- tions to achieve the desired result. This can include return- ing an appropriate read value to the trapped software. The GLIU is often used to implement SSMI traps. Any I/O descriptor can be used for this purpose by setting the Des- tination ID to 0. On a descriptor hit, the GLIU traps the access and sets the SSMI bit in the response packet. 3.8.3.3 ASMI/SSMI Summary Table 3-9 provides a register summary for the Standard GLD_SMI_MSRs. Table 3-9. GLD_MSR_SMIs Summary Port #, Device FLAG Bit EN Bit SMI Type Description Port 0, GLIU (Note 1) 35 3 ASMI Statistics Counter 2 Event 34 2 ASMI Statistics Counter 1 Event 33 1 ASMI Statistics Counter 0 Event 32 0 SSMI Descriptor Trap and Illegal Accesses Port 1, GLPCI_SB 22 6 ASMI Target Abort Signaled 21 5 ASMI Parity Error 20 4 ASMI System Error 19 3 ASMI EXECP Received 18 2 ASMI SSMI Received 17 1 ASMI Target Abort Received 16 0 ASMI Master Abort Received Port 2, USBC2 33 1 ASMI INT by the USB (see PIC for actual source) 32 0 ASMI ASMI for the USB (see USB for actual source) Port 3, ATAC 33 1 ASMI IRQ for IDE (see PIC for actual source) 1 0 SSMI IDE PIO Port 4, DD (DIVIL) 47 15 SSMI PMC PM1_CNT 46 14 SSMI PMC PM2_CNT 45 13 ASMI KEL A20 Keyboard 44 12 SSMI 8237 DMA Controller access during legacy DMA 43 11 SSMI LPC access during legacy DMA 41 9 SSMI UART 2 access during legacy DMA 40 8 SSMI UART 1 access during legacy DMA 39 7 ASMI KEL INIT Port A 38 6 ASMI KEL A20 Port A 37 5 ASMI KEL INIT Keyboard 36 4 ASMI PMC Event (see PMC for actual source) 35 3 ASMI Extended PIC Mapper (see PIC for actual source) 34 2 ASMI KEL Emulation Event 33 1 ASMI Shutdown Special Cycle 32 0 ASMI Halt Special Cycle Port 5, ACC 32 0 SSMI IRQ from ACC Port 6, USBC1 33 1 ASMI INT by the USB (see PIC for actual source) 32 0 ASMI ASMI for the USB (see USB for actual source) Port 7, GLCP (Note 1) 17 1 ASMI Debug event 16 0 ASMI Convert CS5535 Global GLIU_Error to ASMI Note 1. For this device, the listed events are enabled when the EN bit is low. For all other devices, events are enabled when the associ- ated EN bit is high. |
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