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authorAlexander Graf <agraf@suse.de>2016-03-04 01:10:01 +0100
committerTom Rini <trini@konsulko.com>2016-03-15 18:03:10 -0400
commit50149ea37a21dcbed675297f1536c31a7db39c19 (patch)
treed6a18d12c1306cbc1306baed0aeea5ff2f5d2ae4 /board/ti
parentc1311ad4e0d1759788601513fac0f65620d40472 (diff)
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efi_loader: Add runtime services
After booting has finished, EFI allows firmware to still interact with the OS using the "runtime services". These callbacks live in a separate address space, since they are available long after U-Boot has been overwritten by the OS. This patch adds enough framework for arbitrary code inside of U-Boot to become a runtime service with the right section attributes set. For now, we don't make use of it yet though. We could maybe in the future map U-boot environment variables to EFI variables here. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'board/ti')
-rw-r--r--board/ti/am335x/u-boot.lds30
1 files changed, 30 insertions, 0 deletions
diff --git a/board/ti/am335x/u-boot.lds b/board/ti/am335x/u-boot.lds
index 78f294a..a56cc82 100644
--- a/board/ti/am335x/u-boot.lds
+++ b/board/ti/am335x/u-boot.lds
@@ -59,6 +59,36 @@ SECTIONS
. = ALIGN(4);
+ .__efi_runtime_start : {
+ *(.__efi_runtime_start)
+ }
+
+ .efi_runtime : {
+ *(efi_runtime_text)
+ *(efi_runtime_data)
+ }
+
+ .__efi_runtime_stop : {
+ *(.__efi_runtime_stop)
+ }
+
+ .efi_runtime_rel_start :
+ {
+ *(.__efi_runtime_rel_start)
+ }
+
+ .efi_runtime_rel : {
+ *(.relefi_runtime_text)
+ *(.relefi_runtime_data)
+ }
+
+ .efi_runtime_rel_stop :
+ {
+ *(.__efi_runtime_rel_stop)
+ }
+
+ . = ALIGN(4);
+
.image_copy_end :
{
*(.__image_copy_end)