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[U-Boot,66/82] x86: Don't build call64 and setjmp on 64-bit

Message ID 1474860866-16406-67-git-send-email-sjg@chromium.org
State Superseded
Delegated to: Bin Meng
Headers show

Commit Message

Simon Glass Sept. 26, 2016, 3:34 a.m. UTC 
These are currently not supported. Calling 64-bit code from 64-bit U-Boot is
much simpler, so this code is not needed. setjmp() is not yet implemented for
64-bit.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 arch/x86/cpu/Makefile | 6 +++++-
 arch/x86/lib/bootm.c  | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 7f89ff0..f0135a7 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -14,7 +14,11 @@  else
 extra-y	= start.o
 endif
 extra-$(CONFIG_$(SPL_)X86_16BIT_INIT) += resetvec.o start16.o
-obj-y	+= cpu.o cpu_x86.o call64.o setjmp.o
+ifndef CONFIG_$(SPL_)X86_64
+obj-y	+= call64.o setjmp.o
+endif
+
+obj-y	+= cpu.o cpu_x86.o
 
 AFLAGS_REMOVE_call32.o := -mregparm=3 \
 	$(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32)
diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c
index 7cf9de4..b7ed1e6 100644
--- a/arch/x86/lib/bootm.c
+++ b/arch/x86/lib/bootm.c
@@ -146,7 +146,9 @@  int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
 			puts("Cannot boot 64-bit kernel on 32-bit machine\n");
 			return -EFAULT;
 		}
+#if !CONFIG_IS_ENABLED(X86_64)
 		return cpu_jump_to_64bit(setup_base, load_address);
+#endif
 	} else {
 		/*
 		* Set %ebx, %ebp, and %edi to 0, %esi to point to the