X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=arch%2Fx86%2Fcpu%2Fstart.S;h=01524635e9c82d9a498653605dc36d2107ea8d90;hb=748ff5350ae880ea01d3d72214122c3552a5185f;hp=4a82add76b754fcb9726503c73c8d51dd91afc66;hpb=49dffb7a074e9b9d2c27a303798c0e6bc5eea3ba;p=oweals%2Fu-boot.git

diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S
index 4a82add76b..01524635e9 100644
--- a/arch/x86/cpu/start.S
+++ b/arch/x86/cpu/start.S
@@ -2,6 +2,18 @@
 /*
  *  U-Boot - x86 Startup Code
  *
+ * This is always the first code to run from the U-Boot source. To spell it out:
+ *
+ * 1. When TPL (Tertiary Program Loader) is enabled, the boot flow is
+ * TPL->SPL->U-Boot and this file is used for TPL. Then start_from_tpl.S is used
+ * for SPL and start_from_spl.S is used for U-Boot proper.
+ *
+ * 2. When SPL (Secondary Program Loader) is enabled, but not TPL, the boot
+ * flow is SPL->U-Boot and this file is used for SPL. Then start_from_spl.S is
+ * used for U-Boot proper.
+ *
+ * 3. When neither TPL nor SPL is used, this file is used for U-Boot proper.
+ *
  * (C) Copyright 2008-2011
  * Graeme Russ, <graeme.russ@gmail.com>
  *
@@ -40,9 +52,6 @@ _x86boot_start:
 	movl	%eax, %cr0
 	wbinvd
 
-	/* Tell 32-bit code it is being entered from an in-RAM copy */
-	movl	$GD_FLG_WARM_BOOT, %ebx
-
 	/*
 	 * Zero the BIST (Built-In Self Test) value since we don't have it.
 	 * It must be 0 or the previous loader would have reported an error.
@@ -55,11 +64,7 @@ _x86boot_start:
 	.align	4
 	.long	0x12345678
 _start:
-	/*
-	 * This is the 32-bit cold-reset entry point, coming from start16.
-	 * Set %ebx to GD_FLG_COLD_BOOT to indicate this.
-	 */
-	movl	$GD_FLG_COLD_BOOT, %ebx
+	/* This is the 32-bit cold-reset entry point, coming from start16 */
 
 	/* Save BIST */
 	movl	%eax, %ebp
@@ -97,7 +102,7 @@ early_board_init_ret:
 	jmp	car_init
 .globl car_init_ret
 car_init_ret:
-#ifndef CONFIG_HAVE_FSP
+#ifdef CONFIG_USE_CAR
 	/*
 	 * We now have CONFIG_SYS_CAR_SIZE bytes of Cache-As-RAM (or SRAM,
 	 * or fully initialised SDRAM - we really don't care which)
@@ -137,12 +142,13 @@ car_init_ret:
 
 	/* Get address of global_data */
 	mov	%fs:0, %edx
-#ifdef CONFIG_HAVE_FSP
+#if defined(CONFIG_USE_HOB) && !defined(CONFIG_USE_CAR)
 	/* Store the HOB list if we have one */
 	test	%esi, %esi
 	jz	skip_hob
 	movl	%esi, GD_HOB_LIST(%edx)
 
+#ifdef CONFIG_HAVE_FSP
 	/*
 	 * After fsp_init() returns, the stack has already been switched to a
 	 * place within system memory as defined by CONFIG_FSP_TEMP_RAM_ADDR.
@@ -151,6 +157,7 @@ car_init_ret:
 	 */
 	subl	$CONFIG_FSP_SYS_MALLOC_F_LEN, %esp
 	movl	%esp, GD_MALLOC_BASE(%edx)
+#endif
 skip_hob:
 #else
 	/* Store table pointer */