diff options
| author | Alexandru Gagniuc <alexandrux.gagniuc@intel.com> | 2015-10-27 10:27:30 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-02-17 04:57:12 +0100 |
| commit | 6a622311e477d2ac387dc6bb2b9f0f287b149531 (patch) | |
| tree | fc19bd485719dc4f3585e0d8b21cd77ea6810c22 /src/arch | |
| parent | 0188b1399a9b8601ae03797c3e61ad7d382391ea (diff) | |
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 unsuitable. Add an option to allow such platforms to
define their own mapping implementation.
Change-Id: I8293126fd9cc1fd3d75072f7811e659765348e4a
Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc@intel.com>
Reviewed-on: https://review.coreboot.org/13319
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/Kconfig | 10 | ||||
| -rw-r--r-- | src/arch/x86/Makefile.inc | 8 |
2 files changed, 14 insertions, 4 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig index 204a9be052..89e142a3ad 100644 --- a/src/arch/x86/Kconfig +++ b/src/arch/x86/Kconfig @@ -83,6 +83,16 @@ config RAMBASE hex default 0x100000 +# Traditionally BIOS region on SPI flash boot media was memory mapped right below +# 4G and it was the last region in the IFD. This way translation between CPU +# address space to flash address was trivial. However some IFDs on newer SoCs +# have BIOS region sandwiched between descriptor and other regions. Turning off +# this option enables soc code to provide custom mmap_boot.c which can be used to +# implement complex translation. +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 21084d3fd8..56e2ad0d59 100644 --- a/src/arch/x86/Makefile.inc +++ b/src/arch/x86/Makefile.inc @@ -105,7 +105,7 @@ ifeq ($(CONFIG_ARCH_BOOTBLOCK_X86_32)$(CONFIG_ARCH_BOOTBLOCK_X86_64),y) 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 $(call src-to-obj,bootblock,$(dir)/id.S): $(obj)/build.h @@ -354,7 +354,7 @@ romstage-$(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 @@ -384,7 +384,7 @@ 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 @@ -392,7 +392,7 @@ 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 |