Changeset 626 for trunk/kernel/syscalls/sys_display.c

Timestamp:

Apr 29, 2019, 7:25:09 PM (5 years ago)

Author:

alain

Message:

This version has been tested on the sort multithreaded application
for TSAR_IOB architectures ranging from 1 to 8 clusters.
It fixes three bigs bugs:
1) the dev_ioc device API has been modified: the dev_ioc_sync_read()
and dev_ioc_sync_write() function use now extended pointers on the
kernel buffer to access a mapper stored in any cluster.
2) the hal_uspace API has been modified: the hal_copy_to_uspace()
and hal_copy_from_uspace() functions use now a (cxy,ptr) couple
to identify the target buffer (equivalent to an extended pointer.
3) an implementation bug has been fixed in the assembly code contained
in the hal_copy_to_uspace() and hal_copy_from_uspace() functions.

File:

• trunk/kernel/syscalls/sys_display.c (modified) (2 diffs)

trunk/kernel/syscalls/sys_display.c

@@ -56 +56 @@
     else if( type == DISPLAY_MAPPER            ) return "MAPPER";
     else if( type == DISPLAY_BARRIER           ) return "BARRIER";
+    else if( type == DISPLAY_FAT               ) return "FAT";
     else                                         return "undefined";
 }
@@ -436 +437 @@
             break;
         }
+        /////////////////
+        case DISPLAY_FAT:
+        {
+            uint32_t  entries = (uint32_t)arg1;
+
+            if( entries > 4096 )
+                {
+
+#if DEBUG_SYSCALLS_ERROR
+printk("\n[ERROR] in %s for FAT : nb_entries larger than 4096\n",
+__FUNCTION__ );
+#endif
+                        this->errno = EINVAL;
+                        return -1;
+                }
+
+            if( entries == 0 )  // display fat context in cluster cxy
+            {
+                uint32_t  cxy = (uint32_t)arg0;
+
+                if( cluster_is_undefined( cxy ) ) 
+                {
+
+#if DEBUG_SYSCALLS_ERROR
+printk("\n[ERROR] in %s for FAT : illegal cxy argument %x\n",
+__FUNCTION__ , cxy );
+#endif
+                     this->errno = EINVAL;
+                     return -1;
+                }
+
+                fatfs_display_ctx( cxy );
+            }
+            else                  // display nb_entries in page 
+            {                        
+                uint32_t page = (uint32_t)arg0;
+
+                fatfs_display_fat( page , entries );
+            }
+
+            break;
+        }
         ////////
         default: