bsp/pc386: Turn start16.S into a startAP.S

start16.S is now only used for SMP configurations to start the
application processors.

This commit removes all unnecessary parts for this job,
i.e. video conssole initalisation, A20 gate activation
and all non-AP related code.

Update #3335

1 files changed, 12 insertions, 2 deletions

diff --git a/bsps/i386/pc386/start/smp-imps.c b/bsps/i386/pc386/start/smp-imps.c
index 0543b17ec5..58d9178f90 100644
--- a/bsps/i386/pc386/start/smp-imps.c
+++ b/bsps/i386/pc386/start/smp-imps.c
@@ -309,6 +309,11 @@ boot_cpu(imps_processor *proc)
   }
 
   /*
+   *  Wait until AP is in protected mode before starting the next AP
+   */
+  while (reset[2] != 0);
+
+  /*
    *  Generic CPU startup sequence ends here, the rest is cleanup.
    */
 
@@ -342,12 +347,17 @@ add_processor(imps_processor *proc)
     printk("#0  BootStrap Processor (BSP)\n");
     return;
   }
+  /* Setup the apic/cpu maps before booting the APs
+   * otherwise calls to _Get_current_processor can deliver
+   * wrong values if the BSP gets interrupted
+   */
+  imps_cpu_apic_map[imps_num_cpus] = apicid;
+  imps_apic_cpu_map[apicid] = imps_num_cpus;
   if (boot_cpu(proc)) {
 
     /*  XXXXX  add OS-specific setup for secondary CPUs here */
 
-    imps_cpu_apic_map[imps_num_cpus] = apicid;
-    imps_apic_cpu_map[apicid] = imps_num_cpus;
+    /* AP booted successfully, increase number of available cores */
     imps_num_cpus++;
   }
 }