sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

soc/intel: Always advertise MMIO window above 4G in ACPI tables

Browse Source 
There should be no harm in advertising the MMIO window above 4G in
ACPI tables unconditionally. OS can decide whether or not to use the
window. This change removes the config option enable_above_4GB_mmio
and instead adds the correct MMIO window (above 4G) details to ACPI
tables always.

Change-Id: Ie728f6ee7f396918e61b29ade862b57dac36cb08
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41276
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Furquan Shaikh
2020-05-11 19:14:58 -07:00
committed by Aaron Durbin
parent 1085fee761
commit abd4714ee0
8 changed files with 15 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/soc/intel/skylake/acpi/globalnvs.asl
View File

@@ -55,9 +55,8 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
EPCS, 8, // 0x43 - SGX Enabled status
EMNA, 64, // 0x44 - 0x4B EPC base address
ELNG, 64, // 0x4C - 0x53 EPC Length
E4GM, 8, // 0x54 - Enable above 4GB MMIO Resource
A4GB, 64, // 0x55 - 0x5C Base of above 4GB MMIO Resource
A4GS, 64, // 0x5D - 0x64 Length of above 4GB MMIO Resource
A4GB, 64, // 0x54 - 0x5B Base of above 4GB MMIO Resource
A4GS, 64, // 0x5C - 0x63 Length of above 4GB MMIO Resource
/* IGD OpRegion */
Offset (0xb4),

7
src/soc/intel/skylake/include/soc/nvs.h
View File

@@ -45,10 +45,9 @@ typedef struct global_nvs_t {
u8 ecps; /* 0x43 - SGX Enabled status */
u64 emna; /* 0x44 - 0x4B EPC base address */
u64 elng; /* 0x4C - 0x53 EPC Length */
u8 e4gm; /* 0x54 - Enable above 4GB MMIO Resource */
u64 a4gb; /* 0x55 - 0x5C Base of above 4GB MMIO Resource */
u64 a4gs; /* 0x5D - 0x64 Length of above 4GB MMIO Resource */
u8 rsvd[79];
u64 a4gb; /* 0x54 - 0x5B Base of above 4GB MMIO Resource */
u64 a4gs; /* 0x5C - 0x63 Length of above 4GB MMIO Resource */
u8 rsvd[80];
/* IGD OpRegion */
u32 aslb; /* 0xb4 - IGD OpRegion Base Address */