Changes between Version 4 and Version 5 of Component/Vci Xicu

Timestamp:

Oct 30, 2010, 9:40:44 PM (15 years ago)

Author:

alain

Comment:

--

Component/Vci Xicu

@@ -8 +8 @@
 a vectorized interrupt controller, a timer controller, and an Inter-processor interrupt controller.
 
-It can concentrate up to
- * 32 independent interrupt lines
- * 32 independent timers
- * 32 IPI registers
-multiplexing to up to 32 output lines
-
+This controller is an interrupt hub, concentrating 3 types of interrupts: 
+ * up to 32 internal programmable timer interrupts (PTI), 
+ * up to 32 external hardware interrupt lines (HWI), 
+ * up to 32 internal write-triggered interrupts (WTI). 
+All these interrupt sources can be routed to up to 32 interrupt outputs. Each output can 
+mask individual interrupt sources. 
+Priority between interrupt source types is left to the handling operating system. Priority 
+of interrupts inside an interrupt source type is from the lowestIdx(highest priority) to 
+the highestIdx(lower priority). 
 
 Complete specification is in [attachment:xicu-1.0.pdf].
+
+=== 1.1) Constructor Parameters ===
+
+All hardware implementations of this component may not implement all the up-to-32 
+PTI (Timers), up-to-32 HWI lines, up-to-32 WTI registers and up-to-32 OUTPUTlines. 
+The following parameters allow the system designer to get just the needed hardware. 
+
+ * pti count (in range0..32): number of programmable timers 
+ * hwi count (in range0..32): number of external hardware interrupt lines 
+ * wti count (in range0..32): number of write-triggered interrupt sources 
+ * irqcount (in range1..32): number of output interrupt lines 
+
+=== 1.2) Programmers's View ===
+
+This component can be mapped anywhere in the address space, on a 4-KiBboundary. This component is 32-bit data-word based: arbitrary byte access is not supported. 
+12 lower address lines are used the following way: 
+
+|| FUNC   || INDEX || 00 ||
+|| 5 bits || 5bits ||    ||
+
+ * '''FUNC''' indicates the functionnality
+ * '''IDX''' index in the range 0...31
+
+||MODE|| Register         || FUNC  || INDEX   ||
+||R/W || WTI_REG          || 00000 || WTI_IDX ||
+||R/W || PTI_PER          || 00001 || PTI_IDX ||
+||R/W || PTI_VAL          || 00010 || PTI_IDX ||
+||W   || PTI_ACK          || 00011 || PTI_IDX ||
+
+||R/W || MSK_PTI          || 00100 || 0UT_IDX ||
+||W   || MSK_PTI_ENABLE   || 00101 || OUT_IDX ||
+||W   || MSK_PTI_DISABLE  || 00110 || OUT_IDX ||
+||R   || PTI_ACTIVE       || 00110 || OUT_IDX ||
+
+||R/W || MSK_HWI          || 01000 || OUT_IDX ||
+||W   || MSK_HWI_ENABLE   || 01001 || OUT_IDX ||
+||W   || MSK_HWI_DISABLE  || 01010 || OUT_IDX ||
+||R   || HTI_ACTIVE       || 01010 || OUT_IDX ||
+
+||R/W || MSK_WTI          || 01100 || OUT_IDX ||
+||W   || MSK_WTI_ENABLE   || 01101 || OUT_IDX ||
+||W   || MSK_WTI_DISABLE  || 01110 || OUT_IDX ||
+||R   || WTI_ACTIVE       || 01110 || OUT_IDX ||
+
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX ||
+||R/W || WTI_REG_WTI_IDX  || 00000 || WTI_IDX || 
 
 == 2) Component definition & usage ==