Changes between Initial Version and Version 1 of Component/Mailbox

Timestamp:

Feb 16, 2009, 10:48:57 AM (17 years ago)

Author:

andriami@…

Comment:

--

Component/Mailbox

@@ +1 @@
+[wiki:Component SocLib Components General Index] 
+
+= Mailbox =
+
+== 1) Functional Description ==
+
+This component is a generic mailbox: it can contain up to 256 independent, software mailbox.
+This mailbox allows several processors to communicate via an interrupt mechanism. 
+
+There are two sets of registers per mailbox: one to send messages from a processor P1 to a processor P2 and one to issue an interrupt to a processor P2. Each set of mailbox registers consists of three 16-bit registers and a 1-bit flag register. The interrupting processor can use two 16-bit registers to pass data words to the interrupted processor and the other 16-bit register to pass a command word. Writing a command word in the mailbox generates an interrupt signal to the component which address has been specified. The mailboxes are located in the shared memory space.
+Each mailbox takes 12 bytes in the address space, and is seen as 3 memory mapped registers:
+
+   * COMMAND[i] @  BASE + 0[[BR]]
+     A write request sets a command in the COMMAND[i] register and generates an interrupt on the corresponding index. A read request returns the value on the COMMAND[i] register.
+   * DATA_W[i]   @ BASE + 4[[BR]]
+     A write request set the data in the DATA_W[i] register.[[BR]]
+     A read request returns the value of the DATA_W[i] register.
+   * none @ BASE + 8[[BR]]
+     Free space for others data...
+   * RESET_ADR[i] @ BASE + 12[[BR]]
+     Any write request resets the RESET_ADR[i] register to false.[[BR]]
+     A read request returns the 0 value if RESET_ADR[i] is false.
+
+
+== 2) Component definition & usage ==
+
+=== Component definition ===
+
+  * source:trunk/soclib/soclib/module/internal_component/mailbox/caba/metadata/mailbox.sd
+
+=== Usage ===
+
+Mailbox has a Nirq parameter, which defines the number of processors that can be interrupted through the mailbox number.
+For example with two processors:
+   Uses('mailbox', Nirq = 2);
+
+== 3) CABA Implementation ==
+ 
+=== CABA sources ===
+
+   * Interface : source:trunk/soclib/soclib/module/internal_component/mailbox/caba/source/include/mailbox.h
+   * Implementation : source:trunk/soclib/soclib/module/internal_component/mailbox/caba/source/src/mailbox.cpp
+  
+=== CABA Constructor parameters ===
+
+{{{
+mailbox(
+          sc_module_name        insname,                // instance name
+          const soclib::common::IntTab  &index,         // VCI target index
+          const soclib::common::MappingTable    &mt     // segment table
+        );      
+}}}
+
+=== CABA Ports ===
+
+ * sc_in<bool> '''p_resetn''' : hardware reset
+ * sc_in<bool> '''p_clk''' :  clock
+ * soclib::caba::VciTarget<vci_param> '''p_vci''' : The VCI port
+ * sc_out<bool> '''p_irq [Nirq]''' : Interrupts ports array
+
+== 4)  TLM-T Implementation ==
+
+The TLM-T implementation is not yet available.