modularization: boot component

Boot component prepares the very basic platform boot env. It finally call
into platform initilization entries:

- bsp_boot_init & cpu_secondary_init for start up
- or restore_s3_context for wakeup

this patch is the final one, it did some code clean up and move some definition
from vm0_boot.h to boot_context.h.

after this patch, the boot component include files:
arch/x86/boot/cpu_primary.S
arch/x86/boot/trampoline.S
arch/x86/boot/cpu_save_boot_ctx.S
arch/x86/boot/idt.S
boot/reloc.c
boot/include/reloc.h
include/arch/x86/boot/idt.h
include/arch/x86/boot/boot_context.h

Tracked-On: #1842
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>

hypervisor/arch/x86/boot/cpu_primary.S

@@ -4,11 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include        <cpu.h>
-#include        <mmu.h>
-#include        <gdt.h>
 #include        <idt.h>
-#include        <msr.h>
 
 /* NOTE:
  *

hypervisor/arch/x86/boot/cpu_save_boot_ctx.S

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <vm0_boot.h>
+#include <boot_context.h>
 
     .section    entry, "ax"
     .align      8
@@ -13,7 +13,7 @@
     .global     cpu_primary_save_32
 cpu_primary_save_32:
     /* save context from 32bit mode */
-    lea     vm0_boot_context, %eax
+    lea     boot_context, %eax
     sgdt    BOOT_CTX_GDT_OFFSET(%eax)
     sidt    BOOT_CTX_IDT_OFFSET(%eax)
     str     BOOT_CTX_TR_SEL_OFFSET(%eax)
@@ -50,7 +50,7 @@ cpu_primary_save_32:
     .global     cpu_primary_save_64
 cpu_primary_save_64:
     /* save context from 64bit mode */
-    lea     vm0_boot_context(%rip), %r8
+    lea     boot_context(%rip), %r8
     sgdt    BOOT_CTX_GDT_OFFSET(%r8)
     sidt    BOOT_CTX_IDT_OFFSET(%r8)
     str     BOOT_CTX_TR_SEL_OFFSET(%r8)
@@ -90,8 +90,8 @@ cpu_primary_save_64:
 
     .text
     .align  8
-    .global vm0_boot_context
-vm0_boot_context:
+    .global boot_context
+boot_context:
     .rept   SIZE_OF_BOOT_CTX
     .byte 0x00
     .endr

hypervisor/arch/x86/boot/idt.S

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <gdt.h>
 #include <idt.h>
 
 .altmacro

hypervisor/arch/x86/boot/trampoline.S

@@ -15,10 +15,6 @@
  */
 
 #include        <spinlock.h>
-#include        <gdt.h>
-#include        <cpu.h>
-#include        <mmu.h>
-#include        <msr.h>
 
 /* NOTE:
  *
@@ -38,8 +34,6 @@
  */
 
     .extern     cpu_secondary_init
-    .extern     ld_bss_end
-    .extern     HOST_GDTR
 
     .section     .trampoline_reset,"ax"
 

hypervisor/arch/x86/static_checks.c

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 #include <hypervisor.h>
-#include <vm0_boot.h>
+#include <boot_context.h>
 
 #define CAT__(A,B) A ## B
 #define CAT_(A,B) CAT__(A,B)