Changeset 437 for soft/giet_vm/giet_drivers/cma_driver.c

Timestamp:

Nov 3, 2014, 10:53:00 AM (10 years ago)

Author:

alain

Message:

Introducing dynamic allocation of peripheral channel(TTY, NIC, TIM, CMA)
Removint the ICU driver : ICU component not supported anymore.
Removing the FBF driver.

File:

• soft/giet_vm/giet_drivers/cma_driver.c (modified) (4 diffs)

soft/giet_vm/giet_drivers/cma_driver.c

@@ -4 +4 @@
 // Author    : alain greiner
 // Copyright (c) UPMC-LIP6
-///////////////////////////////////////////////////////////////////////////////////
-// The cma_driver.c and cma_driver.h files are part ot the GIET-VM kernel.
-// This driver supports the SocLib vci_chbuf_dma component, that is
-// a multi channels, chained buffer DMA controller.
-//
-// This component can be used in conjonction with the SocLib vci_frame_buffer 
-// to display images, or with the SocLib vci_multi_nic controller to tranfer
-// both RX and TX packets between NIC and memory buffers.
-//
-// The SEG_DMA_BASE address must be defined in the hard_config.h file
-////////////////////////////////////////////////////////////////////////////////////
-// Implementation notes:
-// 1. The higher level access functions can be found in the fbf_driver and 
-//    nic_driver files.
-// 2. All accesses to CMA registers are done by the two
-//    _cma_set_register() and _cma_get_register() low-level functions,
-//    that are handling virtual / physical extended addressing.
 ///////////////////////////////////////////////////////////////////////////////////
 
@@ -31 +14 @@
 #endif
 
-///////////////////////////////////////////////////////////////////////////////
-// This low_level function returns the value contained in register (index).
-///////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////
 unsigned int _cma_get_register( unsigned int channel,
                                 unsigned int index )
@@ -42 +23 @@
 }
 
-///////////////////////////////////////////////////////////////////////////////
-// This low-level function set a new value in register (index).
-///////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////
 void _cma_set_register( unsigned int channel,
                         unsigned int index,
@@ -54 +33 @@
 }
 
-///////////////////////////////////////////////////////////////////////////////
-// This ISR handles the IRQ generated by a CMA channel.
-///////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////
+void _cma_start_channel( unsigned int       channel,
+                         unsigned long long src_paddr,
+                         unsigned int       src_nbufs,
+                         unsigned long long dst_paddr,
+                         unsigned int       dst_nbufs,
+                         unsigned int       buf_length )
+{
+    _cma_set_register( channel, CHBUF_SRC_DESC , (unsigned int)(src_paddr & 0xFFFFFFFF) );
+    _cma_set_register( channel, CHBUF_SRC_EXT  , (unsigned int)(src_paddr >> 32) );
+    _cma_set_register( channel, CHBUF_SRC_NBUFS, src_nbufs );
+    _cma_set_register( channel, CHBUF_DST_DESC , (unsigned int)(dst_paddr & 0xFFFFFFFF) );
+    _cma_set_register( channel, CHBUF_DST_EXT  , (unsigned int)(dst_paddr >> 32) );
+    _cma_set_register( channel, CHBUF_DST_NBUFS, dst_nbufs );
+    _cma_set_register( channel, CHBUF_BUF_SIZE , buf_length );
+    _cma_set_register( channel, CHBUF_PERIOD   , 300 );
+    _cma_set_register( channel, CHBUF_RUN      , 1 );
+}
+
+//////////////////////////////////////////////
+void _cma_stop_channel( unsigned int channel )
+{
+    _cma_set_register( channel, CHBUF_RUN      , 0 );
+}
+
+//////////////////////////////////////
 void _cma_isr( unsigned int irq_type,
                unsigned int irq_id,
                unsigned int channel )
 {
-    _printf("\n[GIET ERROR] _cma_isr() not implemented\n");
+    _puts("\n[GIET ERROR] _cma_isr() not implemented\n");
     _exit();
 }