Kyösti Mälkki uploaded patch set #2 to this change.

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[WIP] arch/x86: Clean up bootblock assembly

We have identical gdtptr16 and gdtptr. The reference in
gdtptr_offset calculation is not accounted for when
considering --gc-sections, so to support linking
gdt_init.S separately add dummy use of gdtptr symbol.

Realmode execution already accessed gdt that was located
outside [_start16bit,_estart16bit] region. Remove latter
symbol as the former was not really a start of region,
but entry point symbol.

With the romcc bootblock solution, entry32.inc may have
been linked into romstage once.

Change-Id: I0a3f6aeb217ca4e38b936b8c9ec8b0b69732cbb9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
---
M src/arch/x86/bootblock.ld
M src/cpu/x86/16bit/entry16.inc
M src/cpu/x86/32bit/entry32.inc
M src/soc/amd/common/block/cpu/noncar/memlayout_x86.ld
4 files changed, 6 insertions(+), 31 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/64/47964/2

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