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| author | Angel Pons <th3fanbus@gmail.com> | 2020-07-23 23:32:46 +0200 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2020-07-28 10:54:02 +0000 |
| commit | b82b4314ad32dcdb02cb5db1efcda3417aa8fe5d (patch) | |
| tree | 85fd33b7bf0465d10cdcd25af1d9809a0ab9f58c /src/include | |
| parent | e5ef197726fb4ebf106cfb11565361ee8d576373 (diff) | |
| download | coreboot-b82b4314ad32dcdb02cb5db1efcda3417aa8fe5d.tar.xz | |
src: Never set ISA Enable on PCI bridges
Looks like no one really knows what this bit would be useful for, nor
when it would need to be set. Especially if coreboot is setting it even
on PCI *Express* bridges. Digging through git history, nearly all
instances of setting it on PCIe bridges comes from i82801gx, for which
no reason was given as to why this would be needed. The other instances
in Intel code seem to have been, unsurprisingly, copy-pasted.
Drop all uses of this definition and rename it to avoid confusion. The
negation in the name could trick people into setting this bit again.
Tested on Asrock B85M Pro4, no visible difference.
Change-Id: Ifaff29561769c111fb7897e95dbea842faec5df4
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43775
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/device/pci_def.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/device/pci_def.h b/src/include/device/pci_def.h index 07ba4a2b30..25372bf51f 100644 --- a/src/include/device/pci_def.h +++ b/src/include/device/pci_def.h @@ -136,7 +136,7 @@ /* Enable parity detection on secondary interface */ #define PCI_BRIDGE_CTL_PARITY 0x01 #define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */ -#define PCI_BRIDGE_CTL_NO_ISA 0x04 /* Disable bridging of ISA ports */ +#define PCI_BRIDGE_CTL_ISA 0x04 /* Disable bridging of ISA ports */ #define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */ #define PCI_BRIDGE_CTL_VGA16 0x10 /* Enable 16-bit i/o port decoding */ #define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */ |