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

Timestamp:

May 5, 2007, 3:26:50 PM (17 years ago)

Author:

alain

Comment:

--

Component/Vci Icu

@@ +1 @@
+= Functional Description =
+
+This VCI target is a memory mapped peripheral implementing
+a vectorized interrupt controller. It can concentrate up 
+to 32 independent interrupt lines '''p_irq_in[i]''' to a single 
+'''p_irq''' interrupt line.
+The active state is high, and the output interrupt '''p_irq is the logical OR of all 
+input interrupts '''p_irq_in[i]'''. 
+Each input interrupt '''p_irq_in[i]''' can be individually masked
+using a memory mapped  32 bits register .
+This component can return the index of the highest priority
+active interrupt '''p_irq_[i]'''. 
+The priority scheme is fixed : The lower indexes have the highest priority.
+The memory segment allocated to this component must be aligned
+on 8 bytes boundary.
+This hardware component cheks for segmentation violation, and can be used
+as a default target.
+
+This component contains 2 memory mapped registers:
+
+ * '''ICU_INDEX'''     : ADDRESS![2:0] = 0x0
+It is actually a 32 bits pseudo-register: A read request
+returns the index value of the highest priority active input interrupt.
+If there is no active interrupt, it returns the 32 value.
+This register is read-only.
+
+ * '''ICU_MASK''' : ADDRESS![2:0] = 0x4 
+Each bit i of this 32 bits register enables the corresponding 
+'''p_irq_in[i]''' input interrupt, when this bit is one.
+This register can be read or written.A write request of a zero gives resets this register.
+This register is write-only.
+
+= CABA  Implementation =
+
+The caba implementation is in 
+ * source:trunk/soclib/systemc/include/caba/target/vci_icu.h
+ * source:trunk/soclib/systemc/src/caba/target/vci_icu.cc
+
+== Template parameters: ==
+ * The VCI parameters
+
+== 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);  // Number of input interrupts
+}}}
+
+== Ports ==
+ * sc_in<bool> p_resetn  : Global system reset
+ * sc_in<bool> p_clk : Global system clock
+ * soclib::caba::VciTarget<vci_param> p_vci : VCI port
+ * sc_out<bool> p_irq : Output interrupt port
+ * sc_in<bool> *p_irq_in : pointer to the input interrupts ports table