From: Stephen Warren swarren@nvidia.com
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 --- doc/README.distro | 8 ++++++++ include/config_distro_bootcmd.h | 12 ++++++++++++ 2 files changed, 20 insertions(+)
diff --git a/doc/README.distro b/doc/README.distro index 019903ea7d91..3715c8c3bad7 100644 --- a/doc/README.distro +++ b/doc/README.distro @@ -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 =================================================================
diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h index c027d8643967..37c6b438e29f 100644 --- a/include/config_distro_bootcmd.h +++ b/include/config_distro_bootcmd.h @@ -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 \