Changeset 611 for trunk/kernel/mm/mapper.c

Timestamp:

Jan 9, 2019, 3:02:51 PM (5 years ago)

Author:

alain

Message:

Introduce sigificant modifs in VFS to support the <ls> command,
and the . and .. directories entries.

File:

• trunk/kernel/mm/mapper.c (modified) (1 diff)

trunk/kernel/mm/mapper.c

@@ -644 +644 @@
 }  // end mapper_remote_set_32()
 
-
+//////////////////////////////////////////////////
+error_t mapper_display_page( xptr_t     mapper_xp,
+                             uint32_t   page_id,
+                             uint32_t   nbytes,
+                             char     * string )
+{
+    xptr_t     page_xp;        // extended pointer on page descriptor
+    xptr_t     base_xp;        // extended pointer on page base
+    char       buffer[4096];   // local buffer
+    uint32_t * tab;            // pointer on uint32_t to scan the buffer
+    uint32_t   line;           // line index
+    uint32_t   word;           // word index
+
+    if( nbytes > 4096)
+    {
+        printk("\n[ERROR] in %s : nbytes (%d) cannot be larger than 4096\n",
+        __FUNCTION__, nbytes );
+        return -1;
+    }
+    
+    // get extended pointer on page descriptor
+    page_xp = mapper_remote_get_page( mapper_xp , page_id );
+
+    if( page_xp == XPTR_NULL)
+    {
+        printk("\n[ERROR] in %s : cannot access page %d in mapper\n",
+        __FUNCTION__, page_id );
+        return -1;
+    }
+
+    // get extended pointer on page base
+    base_xp = ppm_page2base( page_xp );
+   
+    // copy remote page to local buffer
+    hal_remote_memcpy( XPTR( local_cxy , buffer ) , base_xp , nbytes );
+
+    // display 8 words per line
+    tab = (uint32_t *)buffer;
+    printk("\n***** %s : first %d bytes of page %d *****\n", string, nbytes, page_id );
+    for( line = 0 ; line < (nbytes >> 5) ; line++ )
+    {
+        printk("%X : ", line );
+        for( word = 0 ; word < 8 ; word++ ) printk("%X ", tab[(line<<3) + word] );
+        printk("\n");
+    }
+
+    return 0;
+
+}  // end mapper_display_page
+
+