Changeset ae318d3 in mainline for kernel/arch/ia32/src

Timestamp:

2009-02-16T18:50:48Z (16 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

06da55b

Parents:

17f168e

Message:

overhaul pareas: use one single physical area for the physical address space not belonging to physical memory

Location:

kernel/arch/ia32/src/mm

Files:

• frame.c (modified) (4 diffs)
• page.c (modified) (2 diffs)

kernel/arch/ia32/src/mm/frame.c

@@ -51 +51 @@
 
 uintptr_t last_frame = 0;
+uintptr_t end_frame = 0;
 
 static void init_e820_memory(pfn_t minconf)
@@ -74 +75 @@
                                 last_frame =
                                     ALIGN_UP(e820table[i].base_address + e820table[i].size, FRAME_SIZE);
-                }                       
+                }
         }
+        
+        end_frame = last_frame;
 }
 
@@ -114 +117 @@
         if (config.cpu_active == 1) {
                 minconf = 1;
+                
 #ifdef CONFIG_SMP
                 minconf = max(minconf,
@@ -120 +124 @@
 #endif
                 init_e820_memory(minconf);
-
+                
                 /* Reserve frame 0 (BIOS data) */
                 frame_mark_unavailable(0, 1);

kernel/arch/ia32/src/mm/page.c

@@ -94 +94 @@
 }
 
+void hw_area(uintptr_t *physaddr, pfn_t *frames)
+{
+        *physaddr = end_frame;
+        *frames = ADDR2PFN(0xffffffff - end_frame);
+}
+
 void page_fault(int n __attribute__((unused)), istate_t *istate)
 {
@@ -103 +109 @@
         if (istate->error_word & PFERR_CODE_RSVD)
                 panic("Reserved bit set in page directory.");
-
+        
         if (istate->error_word & PFERR_CODE_RW)
                 access = PF_ACCESS_WRITE;