x86: Don't build call64 and setjmp on 64-bit
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> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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@ -14,7 +14,11 @@ else
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extra-y = start.o
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endif
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extra-$(CONFIG_$(SPL_)X86_16BIT_INIT) += resetvec.o start16.o
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obj-y += cpu.o cpu_x86.o call64.o setjmp.o
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ifndef CONFIG_$(SPL_)X86_64
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obj-y += call64.o setjmp.o
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endif
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obj-y += cpu.o cpu_x86.o
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AFLAGS_REMOVE_call32.o := -mregparm=3 \
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$(if $(CONFIG_EFI_STUB_64BIT),-march=i386 -m32)
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@ -155,7 +155,14 @@ int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
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puts("Cannot boot 64-bit kernel on 32-bit machine\n");
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return -EFAULT;
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}
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/* At present 64-bit U-Boot does not support booting a
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* kernel.
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* TODO(sjg@chromium.org): Support booting both 32-bit and
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* 64-bit kernels from 64-bit U-Boot.
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*/
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#if !CONFIG_IS_ENABLED(X86_64)
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return cpu_jump_to_64bit(setup_base, load_address);
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#endif
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} else {
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/*
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* Set %ebx, %ebp, and %edi to 0, %esi to point to the
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