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author | Arthur Heymans <arthur@aheymans.xyz> | 2024-03-23 15:47:39 +0100 |
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committer | Martin L Roth <gaumless@gmail.com> | 2024-03-28 15:20:43 +0000 |
commit | 41eaf2dba315dabb51b5c6a77b083165187ebb18 (patch) | |
tree | 2005acb5a43b4c6f9b780ea9c328ba1a9ed28f7e /src/drivers/ocp/dmi | |
parent | efc615e239004c604a2c907ee36fa21dc6adaf58 (diff) |
soc/amd/non_car/memlayout_x86.ld: Top align the code
This does the following:
- Top align the bootblock so that the only the memory needed gets used.
This might slightly reduce the time the PSP needs to decompress the
bootblock in memory
- Use a memory directive to assert that the 16bit code is inside the top
64K segment
- Use the program counter less. While the BDF linker is happy about
running the program counter backwards, LLD is not. There is no
downside to this.
- Use a symbol rather that the program counter for sections. LLD gets
confused when (.) is used along with '<': it places the section at the
start of the memory region, rather than at the program counter. Using
a variable name works around this.
- Use a 'last_byte' section to make sure the first instruction is at
0xfff0. Both the BDF and the LLD linkers seems to work well with this
code
TEST: Both BFD and LLD are able to link the bootblock
Change-Id: I18bdf262f9c358aa01795b11efcb863686edc79c
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81433
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Diffstat (limited to 'src/drivers/ocp/dmi')
0 files changed, 0 insertions, 0 deletions