Changes between Version 22 and Version 23 of boot_loader

Timestamp:

Mar 21, 2015, 12:53:07 PM (9 years ago)

Author:

alain

Comment:

--

boot_loader

@@ -18 +18 @@
 
 The GIET_VM boot-loader is defined in the [source:soft/giet_vm/giet_boot/boot.c boot.c] and [source:soft/giet_vm/giet_boot/boot_entry.S boot_entry.S] files.
-The main steps are the following:
+The step 1 is executed by processor P(0,0,0) only, but the other steps are executed in parallel by all processor P(x,y,0) : one processor per cluster.
 
 === step 0 ===
@@ -25 +25 @@
  * The stack size for P(x,y,0) is 1.25 Kbytes.
  * The stack size for other processors is 0.25 Kbytes.
- * The SEG_BOOT_STACK_SIZE cannot be smaller than : 0x100 * (NN_PROCS_MAX-1) + 0x500) * X_SIZE * Y_SIZE
+ * The SEG_BOOT_STACK_SIZE cannot be smaller than : 0x100 * (NB_PROCS_MAX-1) + 0x500) * X_SIZE * Y_SIZE
 
 === step 1 ===
-Processor P(0,0,0) initializes the FAT,  initializes the TTY0 lock, initializes the synchronization barrier, and load the ''map.bin'' file to the physical memory bank in cluster(0,0): segment seg_boot_mapping. Then processor P(0,0,0) uses inter-processor-interrupts (WTI) to start the parallel execution, and activates one processor per cluster (processor P(x,y,0) ) in all clusters containing processors.
+Processor P(0,0,0) initializes the FAT,  initializes the TTY0 lock, initializes the synchronization barrier, and load the ''map.bin'' file to the physical memory bank in cluster(0,0), in segment ''seg_boot_mapping''. Then processor P(0,0,0) uses inter-processor-interrupts (WTI) to start the parallel execution, and activates one processor per cluster (processor P(x,y,0) ) in all clusters containing processors.
 
-=== step2 ===
+=== step 2 ===
 In each cluster(x,y), processor P(x,y,0) makes the physical memory allocator initialisation (function  '''boot_pmem_init()''' ). The GIET VM uses two types of pages:  BPP (Big Physical Page, 2 Mbytes), and  SPP  (Small Physical Page, 4 Kbytes).
 There is one SPP and one BPP allocator per cluster containing a physical memory bank.