Patch set updated for coreboot: arch/x86: Add option to disable default mmap_boot implementation

[Alexandru Gagniuc]

Alexandru Gagniuc ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13319

-gerrit

commit 7553d4155ee5bf64fbc8b19b768fc183a8abf5a4
Author: Alexandru Gagniuc 
Date:   Tue Oct 27 10:27:30 2015 -0700

arch/x86: Add option to disable default mmap_boot implementation

On certain platforms, the boot media is either not memory-mapped, or
    not mapped at the top of 4G. This makes the default mmap_boot
    implementation uinsuitable. Add an option to allow such platforms to
    define their own mapping implementation.

Change-Id: I8293126fd9cc1fd3d75072f7811e659765348e4a
    Signed-off-by: Alexandru Gagniuc 
---
 src/arch/x86/Kconfig      | 6 ++++++
 src/arch/x86/Makefile.inc | 8 ++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 738e7d1..d3d33b4 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -77,6 +77,12 @@ config RAMBASE
    hex
    default 0x100000

+# This indicates the boot media is mapped at top of 4G. This variable is used
+# to decide whether to pull in the default mmap_boot.c implementation.
+config X86_TOP4G_BOOTMEDIA_MAP
+	bool
+	default y
+
 # This is something you almost certainly don't want to mess with.
 # How many SIPIs do we send when starting up APs and cores?
 # The answer in 2000 or so was '2'. Nowadays, on many systems,
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index bd9e348..75f06df 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -107,7 +107,7 @@ CFLAGS_bootblock+=-Wa,--divide
 bootblock-y += boot.c
 bootblock-y += memcpy.c
 bootblock-y += memset.c
-bootblock-y += mmap_boot.c
+bootblock-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c

bootblock-y += id.S
 $(obj)/arch/x86/id.bootblock.o: $(obj)/build.h
@@ -356,7 +356,7 @@ romstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += cpu_common.c
 romstage-y += memset.c
 romstage-y += memcpy.c
 romstage-y += memmove.c
-romstage-y += mmap_boot.c
+romstage-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c

romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c

@@ -386,7 +386,7 @@ ramstage-y += memset.c
 ramstage-y += memcpy.c
 ramstage-y += memmove.c
 ramstage-y += ebda.c
-ramstage-y += mmap_boot.c
+ramstage-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c
 ramstage-$(CONFIG_COOP_MULTITASKING) += thread.c
 ramstage-$(CONFIG_COOP_MULTITASKING) += thread_switch.S
 ramstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
@@ -394,7 +394,7 @@ ramstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
 smm-y += memset.c
 smm-y += memcpy.c
 smm-y += memmove.c
-smm-y += mmap_boot.c
+smm-$(CONFIG_X86_TOP4G_BOOTMEDIA_MAP) += mmap_boot.c

ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32),y)
 rmodules_x86_32-y += memset.c