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| author | Ahmad Fatoum <ahmad@a3f.at> | 2021-04-16 08:24:34 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-05-03 14:06:30 +0200 |
| commit | c3a53742f3ae16443ee80dfe3c525a863c577e40 (patch) | |
| tree | d7ca2dc4485bbe0a6cee9841eb189a320f6f8232 /arch/mips | |
| parent | ce65ca49fda3a849f80ddb7d8cafcf90ed765e2c (diff) | |
| download | barebox-c3a53742f3ae16443ee80dfe3c525a863c577e40.tar.gz barebox-c3a53742f3ae16443ee80dfe3c525a863c577e40.tar.xz | |
PCI: support PCI BIOS preassigned buses
When running under UEFI, barebox should no redo PCI enumeration,
because the UEFI implementation will likely already have drivers
that won't cope with e.g. BAR addresses changing.
The user-visible effect of this is that likely the framebuffer will
stop working because the UEFI driver won't be able to access it
any longer.
Support this configuration by changing the PCI code to consult the
new pcibios_assign_all_busses().
When it's true, there is no change to previous behavior.
When it's false, reconfiguration is omitted and instead current
configuration is read back from the bus.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Link: https://lore.barebox.org/20210416062436.332665-3-ahmad@a3f.at
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/pci.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h new file mode 100644 index 0000000000..d7419cabe7 --- /dev/null +++ b/arch/mips/include/asm/pci.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_PCI_H +#define __ASM_PCI_H + +#define pcibios_assign_all_busses() 1 + +#endif |