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| author | Simon Glass <sjg@chromium.org> | 2019-12-06 21:41:37 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-12-15 08:52:29 +0800 |
| commit | 2206ac248a550a4e796cd246ce57300fe7995d91 (patch) | |
| tree | ba6cafc679517bc39897da03342deca45cb91071 /include/pci.h | |
| parent | b14c53398683952723540f82027fb0cbfba4f7de (diff) | |
| download | u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.zip u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.tar.gz u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.tar.bz2 | |
dm: pci: Allow delaying auto-config until after relocation
At present PCI auto-configuration happens in U-Boot both before and after
relocation. This is a waste of time and may mess up static addresses used
in board_init_f(). Adjust the code to supporting doing auto-configuration
once, after relocation, under control of a device-tree property.
This is needed for Apollo Lake for debugging the silicon-init code. Once
the UART is moved to a different MMIO address the debug UART does not work
and any debug output in Apollo Lake's arch_fsp_init_r() causes a hang.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/pci.h')
| -rw-r--r-- | include/pci.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/pci.h b/include/pci.h index ff59ac0..de17d0f 100644 --- a/include/pci.h +++ b/include/pci.h @@ -571,15 +571,22 @@ extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t dev #define INDIRECT_TYPE_NO_PCIE_LINK 1 -/* +/** * Structure of a PCI controller (host bridge) * * With driver model this is dev_get_uclass_priv(bus) + * + * @skip_auto_config_until_reloc: true to avoid auto-config until U-Boot has + * relocated. Normally if PCI is used before relocation, this happens + * before relocation also. Some platforms set up static configuration in + * TPL/SPL to reduce code size and boot time, since these phases only know + * about a small subset of PCI devices. This is normally false. */ struct pci_controller { #ifdef CONFIG_DM_PCI struct udevice *bus; struct udevice *ctlr; + bool skip_auto_config_until_reloc; #else struct pci_controller *next; #endif |