Changeset 106 for trunk/hal/tsar_mips32/core/hal_ppm.c

Timestamp:

Jun 30, 2017, 9:16:22 AM (7 years ago)

Author:

max@…

Message:

style and typos

File:

• trunk/hal/tsar_mips32/core/hal_ppm.c (modified) (4 diffs)

trunk/hal/tsar_mips32/core/hal_ppm.c

@@ -1 +1 @@
 /*
- * hal_gpt.C - Generic Physcal Page Table API implementation for the TSAR archtecture.
+ * hal_ppm.c - Generic Physical Page Table API implementation for TSAR
  *
  * Authors  Alain Greiner (2016,2017)
- * 
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -36 +35 @@
 
 //////////////////////////////////////////////////////////////////////////////////////////
-// For The TSAR architecture, the kernel pointers are identity mapping: 
-// - the 32 bits PTR value is identical to the 32 bits LPA value, 
+// For The TSAR architecture, the kernel pointers are identity mapped:
+// - the 32 bits PTR value is identical to the 32 bits LPA value,
 // - the 64 bits XPTR value is identical to the 64 bits PADDR value.
 // The pages_tbl[] is mapped in first free page after kernel code.
@@ -47 +46 @@
 error_t  hal_ppm_init( boot_info_t * info )
 {
-    uint32_t i;
+        uint32_t i;
 
-    // get relevant info from boot_info structure
+        // get relevant info from boot_info structure
         uint32_t   pages_nr         = info->pages_nr;
-    uint32_t   pages_tbl_offset = info->pages_offset;
-    uint32_t   rsvd_nr          = info->rsvd_nr;
+        uint32_t   pages_tbl_offset = info->pages_offset;
+        uint32_t   rsvd_nr          = info->rsvd_nr;
 
-    // check no reserved zones other than kernel code for TSAR
-    assert( (rsvd_nr == 0 ) , __FUNCTION__ , "NO reserved zones for TSAR\n" ); 
+        // check no reserved zones other than kernel code for TSAR
+        assert( (rsvd_nr == 0 ) , __FUNCTION__ , "NO reserved zones for TSAR\n" );
 
-    // get pointer on local Physical Page Manager
-    ppm_t * ppm = &LOCAL_CLUSTER->ppm;
-    
-    // initialize lock protecting the free_pages[] lists 
+        // get pointer on local Physical Page Manager
+        ppm_t * ppm = &LOCAL_CLUSTER->ppm;
+
+        // initialize lock protecting the free_pages[] lists
         spinlock_init( &ppm->free_lock );
 
-    // initialize lock protecting the dirty_pages list 
+        // initialize lock protecting the dirty_pages list
         spinlock_init( &ppm->dirty_lock );
 
-    // initialize all free_pages[] lists as empty
+        // initialize all free_pages[] lists as empty
         for( i = 0 ; i < CONFIG_PPM_MAX_ORDER ; i++ )
         {
@@ -73 +72 @@
         }
 
-    // initialize dirty_list as empty
-    list_root_init( &ppm->dirty_root );
+        // initialize dirty_list as empty
+        list_root_init( &ppm->dirty_root );
 
-    // initialize pages_nr, pages_tbl, and vaddr_base pointers
-    // (TSAR uses identity mapping for kernel pointers)
-    // I86 architectures should use vaddr_base = 0xFFFF8000000000 + (cxy << 36)
+        // initialize pages_nr, pages_tbl, and vaddr_base pointers
+        // (TSAR uses identity mapping for kernel pointers)
+        // x86 architectures should use vaddr_base = 0xFFFF8000000000 + (cxy << 36)
+        ppm->pages_nr      = pages_nr;
+        ppm->vaddr_base = NULL;
+        ppm->pages_tbl  = (page_t*)( ppm->vaddr_base +
+                                     (pages_tbl_offset << CONFIG_PPM_PAGE_SHIFT) );
 
-        ppm->pages_nr      = pages_nr;
-    ppm->vaddr_base = NULL;
-        ppm->pages_tbl  = (page_t*)( ppm->vaddr_base + 
-                                 (pages_tbl_offset << CONFIG_PPM_PAGE_SHIFT) );
+        // compute size of pages_tbl[] array rounded to an integer number of pages
+        uint32_t bytes = ARROUND_UP( pages_nr * sizeof(page_t), CONFIG_PPM_PAGE_SIZE );
 
-    // compute size of pages_tbl[] array rounded to an integer number of pages
-    uint32_t bytes = ARROUND_UP( pages_nr * sizeof(page_t), CONFIG_PPM_PAGE_SIZE );
-
-    // compute number of pages required to store page descriptor array
+        // compute number of pages required to store page descriptor array
         uint32_t pages_tbl_nr = bytes >> CONFIG_PPM_PAGE_SHIFT;
 
-    // compute total number of reserved pages (kernel code & pages_tbl[])
+        // compute total number of reserved pages (kernel code & pages_tbl[])
         uint32_t reserved_pages = pages_tbl_offset + pages_tbl_nr;
 
-    // initialises all page descriptors in pages_tbl[]
+        // initialize all page descriptors in pages_tbl[]
         for( i = 0 ; i < pages_nr ; i++ )
-    {
-        page_init( &ppm->pages_tbl[i] );
+        {
+                page_init( &ppm->pages_tbl[i] );
 
-        // TODO optimisation for this enormous loop on small pages:
-        // make only a partial init with a memset, and complete the 
-        // initialisation when page is allocated [AG]
-    }
+                // TODO optimisation for this enormous loop on small pages:
+                // make only a partial init with a memset, and complete the
+                // initialisation when page is allocated [AG]
+        }
 
-    // - set PG_RESERVED flag for reserved pages (kernel code & pages_tbl[])
-    // - release all other pages to populate the free lists
+        // - set PG_RESERVED flag for reserved pages (kernel code & pages_tbl[])
+        // - release all other pages to populate the free lists
         for( i = 0 ; i < reserved_pages ; i++)
-    {
-        page_set_flag( &ppm->pages_tbl[i] , PG_RESERVED );
-    }
+        {
+                page_set_flag( &ppm->pages_tbl[i] , PG_RESERVED );
+        }
         for( i = reserved_pages ; i < pages_nr ; i++ )
         {
-            ppm_free_pages_nolock( &ppm->pages_tbl[i] );
+                ppm_free_pages_nolock( &ppm->pages_tbl[i] );
 
-        // TODO optimisation : decompose this enormous set of small pages
-        // to several sets of big pages with various order values
+                // TODO optimisation : decompose this enormous set of small pages
+                // to several sets of big pages with various order values
         }
 
-    // check consistency
-    return ppm_assert_order( ppm );
+        // check consistency
+        return ppm_assert_order( ppm );
+}
 
-}  // end hal_ppm_init()
-