Changes between Initial Version and Version 1 of Component/Vci Multi Icu

Timestamp:

Dec 12, 2013, 10:21:55 AM (12 years ago)

Author:

alain

Comment:

--

Component/Vci Multi Icu

@@ +1 @@
+[wiki:Component SocLib Components General Index] 
+
+= !VciMultiIcu =
+
+== 1) Functional Description ==
+
+This VCI target is a multi-channels memory mapped peripheral implementing
+a vectorized interrupt controller. It can concentrate up 
+to 32 input interrupts '''p_irq_in[i]''' to 8 output
+interrupts '''p_irq_out[k]'''. 
+
+It behaves as 8 independant '''VciIcu''' components, and can be used in a multi-processors
+architecture to dispatch the peripheral interrupts to the various processors, using
+the software programmable registers ICU_MASK[k].
+
+There is one independant set of registers for each channel [k] (i.e. for each output interrupt) and each input interrupt can be individually masked through the programmable register ICU_MASK[k].
+
+The priority scheme is fixed : The lower indexes have the highest priority.
+
+For each channel [k], the ICU_IT_VECTOR[k] register can be addressed to return the index of the highest priority, non masked, active interrupt '''p_irq_[i]'''. 
+
+This hardware component checks for segmentation violation, and can be used
+as a default target.
+
+For each channel [k] there is five addressable registers:
+
+ * `ICU_INT[k]`
+   Each bit in this register reflects the state of the corresponding input interrupt line.
+   This is read-only.
+
+ * `ICU_MASK[k]`
+   Each bit in this register reflects the state of the enable for the corresponding interrupt line.
+   This is read-only.
+
+ * `ICU_MASK_SET[k]`
+   Each bit set in the written word will be set in the ICU MASK. (ICU_MASK = ICU_MASK | written_data).
+   This is write-only.
+
+ * `ICU_MASK_CLEAR[k]`
+   Each bit set in the written word will be reset in the ICU MASK. (ICU_MASK = ICU_MASK & ~written_data).
+   This is write-only.
+
+ * `ICU_IT_VECTOR[k]`
+   This register gives the index of the highest-priority active interrupt.
+   If no interrupt is active, (-1) is returned.
+   This is read-only.
+
+For extensibility issues, you should access your ICU using globally-defined offsets.
+
+You should include file `soclib/icu.h` from your software, it
+defines `ICU_INT`, `ICU_MASK`, `ICU_MASK_SET`, `ICU_MASK_CLEAR`, `ICU_IT_VECTOR`.
+
+
+== 2) Component definition & usage ==
+
+source:trunk/soclib/module/infrastructure_component/interrupt_infrastructure/vci_multi_icu/caba/metadata/vci_multi_icu.sd
+
+{{{
+Uses( 'vci_icu')
+}}}
+
+== 3) CABA  Implementation ==
+
+=== CABA sources ===
+
+ * interface : source:trunk/soclib/soclib/module/infrastructure_component/interrupt_infrastructure/vci_multi_icu/caba/source/include/vci_multi_icu.h
+ * implementation : source:trunk/soclib/soclib/module/infrastructure_component/interrupt_infrastructure/vci_multi_icu/caba/source/src/vci_multi_icu.cpp
+
+=== CABA Constructor parameters ===
+{{{ 
+VciIcu(
+     sc_module_name name,  // Component Name
+     const soclib::common::InTab &index, // Target index
+     const soclib::common::MappingTable &mt,  // Mapping Table
+     size_t nirq_in,  // Number of input interrupts
+     size_t nirq_out);  // Number of channels (output interrupts)
+}}}
+
+=== CABA Ports ===
+ * '''p_resetn'''  : Global system reset
+ * '''p_clk''' : Global system clock
+ * '''p_vci''' : VCI target port
+ * '''p_irq_in[i]''' : Up to 32 input IRQ ports
+ * '''p_irq_out[k]''' : Up to 8 output IRQ ports
+