Changes between Version 20 and Version 21 of kernel_syscalls

Timestamp:

Nov 26, 2014, 6:36:59 PM (10 years ago)

Author:

alain

Comment:

--

kernel_syscalls

@@ -56 +56 @@
 This function allocates a private NIC_RX or NIC_TX channel, the associated chbuf, and a private CMA channel to the calling task. It register these channel indexes in the task context.
  * '''is_isr''' : boolean (RX transfer if non zero)
-Returns 0 if success. Return -1 if no NIC channel available, or if no CMA channel available.
+Returns the NIC channel index if success. Return -1 if no NIC channel available, or if no CMA channel available.
 
 === 2) int '''_sys_nic_start'''( unsigned int is_rx ) ===
 This function starts the NIC channel allocated to the calling task, and starts the CMA transfer between the internal NIC chbuf and the kernel chbuf allocated to the calling task.
  * '''is_isr''' : boolean (RX transfer if non zero)
- * '''mac4''' : 32 LSB bits of the MAC address
- * '''mac4''' : 16 MSB bits of the MAC address
 Returns 0 if success. Returns -1 if no NIC channel or no CMA channel allocated to the calling task.
 
-=== 3) int '''_sys_nic_move'''(  unsigned int is_rx,  void* buffer ) ===
-This function moves one 4kbytes container between the kernel chbuf allocated to the calling task, and an user buffer. 
+=== 3) int '''_sys_nic_move'''(  unsigned int nic_channel,  unsigned int is_rx,  void* buffer ) ===
+This function moves one 4kbytes container between the kernel chbuf defined by the nic_channel argument, and an user buffer. 
+ * '''nic_channel''' : selected nic_chbuf channel.
  * '''is_isr''' : boolean (RX transfer if non zero)
  * '''buffer''' is the user buffer virtual base address.
@@ -72 +71 @@
 It is blocking if the kernel chbuf is empty (for an RX transfer) or full (for a TX transfer). The bloking situation
 is bounded by a timeout defined by the GIET_NIC_TIMEOUT parameter defined in the ''giet_config.h'' file.
-Returns 0 if success, returns -1 if the user buffer address is illegal, or if there is no  NIC_RX channel allocated to the calling task, or if the timeout is elapsed.
+Returns 0 if success, returns -1 if the user buffer address is illegal, or if the NIC channel is too large, or if the timeout is elapsed.
 
 === 4) int '''_sys_nic_stop'''( unsigned int is_rx ) ===