Changes between Version 1 and Version 2 of boot_loader

Timestamp:

Nov 5, 2014, 2:55:13 PM (11 years ago)

Author:

alain

Comment:

--

boot_loader

@@ -3 +3 @@
 The GIET-VM boot-loader is defined in the [source:soft/giet_vm/giet_boot/boot.c boot.c] file.
 
-The ''boot_init'' function makes the initialisation in two steps:
+The ''boot_init()'' function makes the initialisation in two steps:
  
-The first step is sequencially executed by proc[0][0][0], while other processors are in wait state:
- * Physical memory allocators initialisation : ''boot_pmem_init()''
- * Page table initialisation : ''boot_ptabs_init()''
+== __Sequencial step__ ==
+
+The first step executed by proc[0][0][0], while other processors are in wait state.
+
+=== void '''boot_pmem_init()''' ===
+This function makes the physical memory allocators initialisation. The GIET VM uses two types of pages: 
+ * BPP : Big Physical Page (2 Mbytes).
+ * SPP : Small Physical Page (4 Kbytes).
+There is one SPP and one BPP allocator per cluster containing a physical memory bank.
+All the physical memory allocation is done by the boot-loader
+=== void '''boot_ptabs_init()''' ===
+This function makes the page table initialisation. There is one page table per user application (vspace) defined in the mapping.
+All these  
  * Proc[0][0][0] MMU activation
  * Private vobjs initialisation : ''boot_vobjs_init()''
@@ -14 +24 @@
  * Kernel & application code loading : ''boot_elf_load()''
  * Start all other processors
+
+== __Parallel step__ ==
+
 The second step is executed in parallel by all processors:
  * CP0_SCHED register initialisation