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distro bootcmd: enumerate PCI before network operations

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The PCI bus must be enumerated before PCI devices, such as Ethernet
devices, are known to U-Boot. Enhance the distro boot commands to perform
PCI enumeration when needed.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2016-01-26 11:10:13 -07:00 committed by Simon Glass
parent 3483b75d94
commit 986691fb97
2 changed files with 20 additions and 0 deletions
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8
doc/README.distro
View file

@ -349,6 +349,14 @@ boot_net_usb_start:
device is not attached to USB, and you wish to increase boot speed by
avoiding unnecessary actions.
boot_net_pci_enum:
If you want to prevent PCI enumeration by distro boot commands which execute
network operations, set the value to something innocuous, e.g. setenv
boot_net_pci_enum true. This would be useful if you know your Ethernet
device is not attached to PCI, and you wish to increase boot speed by
avoiding unnecessary actions.
Interactively booting from a specific device at the u-boot prompt
=================================================================

12
include/config_distro_bootcmd.h
View file

@ -139,6 +139,15 @@
BOOT_TARGET_DEVICES_references_IDE_without_CONFIG_CMD_IDE
#endif
#if defined(CONFIG_CMD_PCI_ENUM) || defined(CONFIG_DM_PCI)
#define BOOTENV_RUN_NET_PCI_ENUM "run boot_net_pci_enum; "
#define BOOTENV_SHARED_PCI \
"boot_net_pci_enum=pci enum\0"
#else
#define BOOTENV_RUN_NET_PCI_ENUM
#define BOOTENV_SHARED_PCI
#endif
#ifdef CONFIG_CMD_USB
#define BOOTENV_RUN_NET_USB_START "run boot_net_usb_start; "
#define BOOTENV_SHARED_USB \
@ -161,6 +170,7 @@
#define BOOTENV_DEV_DHCP(devtypeu, devtypel, instance) \
"bootcmd_dhcp=" \
BOOTENV_RUN_NET_USB_START \
BOOTENV_RUN_NET_PCI_ENUM \
"if dhcp ${scriptaddr} ${boot_script_dhcp}; then " \
"source ${scriptaddr}; " \
"fi\0"
@ -177,6 +187,7 @@
#define BOOTENV_DEV_PXE(devtypeu, devtypel, instance) \
"bootcmd_pxe=" \
BOOTENV_RUN_NET_USB_START \
BOOTENV_RUN_NET_PCI_ENUM \
"dhcp; " \
"if pxe get; then " \
"pxe boot; " \
@ -200,6 +211,7 @@
#define BOOTENV \
BOOTENV_SHARED_HOST \
BOOTENV_SHARED_MMC \
BOOTENV_SHARED_PCI \
BOOTENV_SHARED_USB \
BOOTENV_SHARED_SATA \
BOOTENV_SHARED_SCSI \