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util/inteltool: Add MCHBAR dumping support for Ice Lake U systems 

According to intels datasheet

Document Number: 341078-001
10th Generation Intel® Core™ Processor Families
Volume 2 of 2

we can dump the ICL MCHBAR similiar as on 8th / 9th gen CPUs.
The difference is that on ICL the MCHBAR address is definited by
the bits 38:16 instead of 38:15 giving the constraint that it has
to be 64kbit instead of 32kbit aligned. (Section 3.1.13)

Change-Id: Ia597a4b3738c11cb48ce5808d8459b4a2a768077
Signed-off-by: Johanna Schander <coreboot@mimoja.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38211
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
This commit is contained in:
Johanna Schander 2020-01-06 08:52:49 +01:00 committed by Nico Huber
parent fc31158522
commit 4ddbbd84d9
1 changed files with 6 additions and 0 deletions
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6
util/inteltool/memory.c
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@ -232,6 +232,12 @@ int print_mchbar(struct pci_dev *nb, struct pci_access *pacc, const char *dump_s
mchbar_phys &= 0x0000007fffff8000UL; /* 38:15 */
size = 32768;
break;
case PCI_DEVICE_ID_INTEL_CORE_10TH_GEN_U:
mchbar_phys = pci_read_long(nb, 0x48);
mchbar_phys |= ((uint64_t)pci_read_long(nb, 0x4c)) << 32;
mchbar_phys &= 0x0000007fffff0000UL; /* 38:16 */
size = 32768;
break;
default:
printf("Error: Dumping MCHBAR on this northbridge is not (yet) supported.\n");
return 1;