Changeset 614 for soft/giet_vm/giet_libs

Timestamp:

Jul 15, 2015, 6:15:52 PM (10 years ago)

Author:

bellefin

Message:

Change the syscalls related to the NIC and the CMA
1) In a CHBUF, every buffer is linked to a variable called “status” which is equal to 1 if the buffer is full or 0 if it is empty. The status occupies 64 bytes to simplify cache coherence
2) The CHBUF descriptor now contains the physical addresses of the buffer and its status. It only occupies 64 bits.

Location:

soft/giet_vm/giet_libs

Files:

• stdio.c (modified) (1 diff)
• stdio.h (modified) (2 diffs)

soft/giet_vm/giet_libs/stdio.c

@@ -698 +698 @@
 
 ///////////////////////////////////////////
-void giet_fbf_cma_start( void *       buf0,
-                         void *       buf1,
-                         unsigned int length )
+void giet_fbf_cma_init_buf( void* buf0_vbase, 
+                            void* buf1_vbase,
+                            void* sts0_vaddr,
+                            void* sts1_vaddr )
+{
+    if ( sys_call( SYSCALL_FBF_CMA_INIT_BUF,
+                   (unsigned int)buf0_vbase, 
+                   (unsigned int)buf1_vbase,
+                   (unsigned int)sts0_vaddr, 
+                   (unsigned int)sts1_vaddr ) )   giet_exit("error in giet_fbf_cma_init_buf()");
+}
+
+///////////////////////////////////////////
+void giet_fbf_cma_start( unsigned int length )
 {
     if ( sys_call( SYSCALL_FBF_CMA_START,
-                   (unsigned int)buf0, 
-                   (unsigned int)buf1, 
-                   length,
-                   0 ) )   giet_exit("error in giet_fbf_cma_start()");
+                   length, 
+                   0, 0, 0 ) )   giet_exit("error in giet_fbf_cma_start()");
 }
 

soft/giet_vm/giet_libs/stdio.h

@@ -27 +27 @@
 #define SYSCALL_GLOBAL_TASK_ID       0x09
 #define SYSCALL_FBF_CMA_ALLOC        0x0A
-#define SYSCALL_FBF_CMA_START        0x0B
-#define SYSCALL_FBF_CMA_DISPLAY      0x0C
-#define SYSCALL_FBF_CMA_STOP         0x0D
-#define SYSCALL_EXIT                 0x0E
-#define SYSCALL_PROCS_NUMBER         0x0F
-
-#define SYSCALL_FBF_SYNC_WRITE       0x10
-#define SYSCALL_FBF_SYNC_READ        0x11
-#define SYSCALL_THREAD_ID            0x12
-//                                   0x13
+#define SYSCALL_FBF_CMA_INIT_BUF     0x0B
+#define SYSCALL_FBF_CMA_START        0x0C
+#define SYSCALL_FBF_CMA_DISPLAY      0x0D
+#define SYSCALL_FBF_CMA_STOP         0x0E
+#define SYSCALL_EXIT                 0x0F
+
+#define SYSCALL_PROCS_NUMBER         0x10
+#define SYSCALL_FBF_SYNC_WRITE       0x11
+#define SYSCALL_FBF_SYNC_READ        0x12
+#define SYSCALL_THREAD_ID            0x13
 #define SYSCALL_TIM_ALLOC            0x14
 #define SYSCALL_TIM_START            0x15
@@ -228 +228 @@
 extern void giet_fbf_cma_alloc();
 
-extern void giet_fbf_cma_start( void*        buf0, 
-                                void*        buf1,
-                                unsigned int length );
+extern void giet_fbf_cma_init_buf( void* buf0_vbase, 
+                                   void* buf1_vbase,
+                                   void* sts0_vaddr,
+                                   void* sts1_vaddr );
+
+extern void giet_fbf_cma_start( unsigned int length );
 
 extern void giet_fbf_cma_display( unsigned int buffer );