soc/intel: common,skl,cnl,icl: drop reserved mmio memory size calculation

Remove the calculation of the Reserved Intel MMIO Memory size from
systemagent and memmap, since it is not needed.

The size is used in SA to calculate the space between cbmem_top and TSEG
without DPR and Chipset Reserved Memory. Since this will always be equal
to 0, the reservation will be skipped and TSEG, DPR and Chipset Reserved
Memory will get reserved alltogether.

By reading the code and pratical testing we figured out that:
- TSEG - DPR - reserved - top_of_memory == 0
- TSEG - DPR - reserved == top_of_memory

This means the whole block will never reserve anything because it is
always 0. Hence the code can be removed for simplification.

Tested successfully on X11SSM-F

Change-Id: I0cc730551eb3a79c78a971b40056de8d029f4b82
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36216
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/systemagent.h b/src/soc/intel/common/block/include/intelblocks/systemagent.h
index 133047c5b7..ae9213c395 100644
--- a/src/soc/intel/common/block/include/intelblocks/systemagent.h
+++ b/src/soc/intel/common/block/include/intelblocks/systemagent.h
@@ -106,8 +106,4 @@ void soc_add_fixed_mmio_resources(struct device *dev, int *resource_cnt);
 /* SoC specific APIs to get UNCORE PRMRR base and mask values
  * returns 0, if able to get base and mask values; otherwise returns -1 */
 int soc_get_uncore_prmmr_base_and_mask(uint64_t *base, uint64_t *mask);
-
-/* SoC call to summarize all Intel Reserve MMIO size and report to SA */
-size_t soc_reserved_mmio_size(void);
-
 #endif	/* SOC_INTEL_COMMON_BLOCK_SA_H */