From 6f66f414a0907f79abf492cd9eca839c0849c7f6 Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Thu, 1 Dec 2016 22:08:18 +0200 Subject: PCI ops: MMCONF_SUPPORT_DEFAULT is required MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Doing PCI config operations via MMIO window by default is a requirement, if supported by the platform. This means chipset or CPU code must enable MMCONF operations early in bootblock already, or before platform-specific romstage entry. Platforms are allowed to have NO_MMCONF_SUPPORT only in the case it is actually not implemented in the silicon. Change-Id: Id4d9029dec2fe195f09373320de800fcdf88c15d Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/17693 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/mainboard/emulation/qemu-q35/bootblock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/mainboard/emulation/qemu-q35/bootblock.c') diff --git a/src/mainboard/emulation/qemu-q35/bootblock.c b/src/mainboard/emulation/qemu-q35/bootblock.c index 939a4e6320..68df39f27a 100644 --- a/src/mainboard/emulation/qemu-q35/bootblock.c +++ b/src/mainboard/emulation/qemu-q35/bootblock.c @@ -10,12 +10,12 @@ static void bootblock_northbridge_init(void) /* * The "io" variant of the config access is explicitly used to - * setup the PCIEXBAR because CONFIG_MMCONF_SUPPORT_DEFAULT is set to + * setup the PCIEXBAR because CONFIG_MMCONF_SUPPORT is set to * to true. That way all subsequent non-explicit config accesses use * MCFG. This code also assumes that bootblock_northbridge_init() is * the first thing called in the non-asm boot block code. The final * assumption is that no assembly code is using the - * CONFIG_MMCONF_SUPPORT_DEFAULT option to do PCI config acceses. + * CONFIG_MMCONF_SUPPORT option to do PCI config acceses. * * The PCIEXBAR is assumed to live in the memory mapped IO space under * 4GiB. -- cgit v1.2.3