This patchset introduces device tree support on x86. The device tree is
passed by the bootloader via setup_data. It is used as an additional
source of information and does not replace the "traditional" x86 boot
page.
Right now we get the the following information from it:
- hpet location
- apic & ioapic location
- ioapic's interrupt routing
- legacy devices which are not initialized by bios
- devices which are behind a bus which does not support enumeration like
i2c
Histrory:
- v1 initial post
- v2: Benh took my device tree apart so once this got fixed I refactor a
lot of code. Here are the changes:
- device tree is unflattenend before kmalloc() is working,
alloc_bootmem() is used for that.
- irq_host got renamed to irq_domain. This custom implementation
will leave once the powerpc implementation is in generic shape
- of_irq_map_pci() is moved from ppc & microblaze into drivers/of
and used also by x86 instead of a tiny subset of it. Bridges are
not handled at all on x86 (I don't have any so for so I worry
later)
- the device tree is relocated from its initial location. That
means that the boot loader does not need to know anything about
kernel's memory layout.
The series is based on the tip tree and is also available at
git://git.linutronix.de/users/bigeasy/soda.git ce_of_v2
Sebastian Andrzej Siewior (15):
x86/e820: remove conditional early mapping in parse_e820_ext
x86: Add device tree support
x86/dtb: Add a device tree for CE4100
x86/dtb: add irq domain abstraction
x86/dtb: add early parsing of APIC and IO APIC
x86/dtb: add support hpet
of: move of_irq_map_pci() into generic code
x86/dtb: add support for PCI devices backed by dtb nodes
x86/dtb: Add generic bus probe
x86/ioapic: Add OF bindings for IO-APIC
x86/ce4100: use OF for ioapic
of/address: use propper endianess in get_flags
x86/rtc: don't register rtc if we have an OF node for it
rtc/cmos: add OF bindings
x86/pci: remove warning
Documentation/powerpc/dts-bindings/rtc-cmos.txt | 28 ++
Documentation/x86/boot_with_dtb.txt | 26 ++
arch/microblaze/include/asm/prom.h | 15 -
arch/microblaze/kernel/prom_parse.c | 77 -----
arch/microblaze/pci/pci-common.c | 1 +
arch/powerpc/include/asm/prom.h | 17 +-
arch/powerpc/kernel/pci-common.c | 1 +
arch/powerpc/kernel/prom_parse.c | 84 ------
arch/x86/Kconfig | 7 +
arch/x86/include/asm/bootparam.h | 1 +
arch/x86/include/asm/e820.h | 2 +-
arch/x86/include/asm/io_apic.h | 7 +
arch/x86/include/asm/irq_controller.h | 12 +
arch/x86/include/asm/prom.h | 87 ++++++
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/apic/io_apic.c | 99 +++++++
arch/x86/kernel/e820.c | 8 +-
arch/x86/kernel/irqinit.c | 9 +-
arch/x86/kernel/prom.c | 349 +++++++++++++++++++++++
arch/x86/kernel/rtc.c | 23 ++
arch/x86/kernel/setup.c | 24 ++-
arch/x86/pci/ce4100.c | 2 +-
arch/x86/platform/ce4100/ce4100.c | 24 ++-
arch/x86/platform/ce4100/falconfalls.dts | 212 ++++++++++++++
drivers/of/Makefile | 1 +
drivers/of/address.c | 54 ++--
drivers/of/of_pci.c | 97 +++++++
drivers/rtc/rtc-cmos.c | 40 +++
include/linux/of_address.h | 6 +-
include/linux/of_pci.h | 24 ++
30 files changed, 1097 insertions(+), 241 deletions(-)
create mode 100644 Documentation/powerpc/dts-bindings/rtc-cmos.txt
create mode 100644 Documentation/x86/boot_with_dtb.txt
create mode 100644 arch/x86/include/asm/irq_controller.h
create mode 100644 arch/x86/include/asm/prom.h
create mode 100644 arch/x86/kernel/prom.c
create mode 100644 arch/x86/platform/ce4100/falconfalls.dts
create mode 100644 drivers/of/of_pci.c
create mode 100644 include/linux/of_pci.h
Sebastian
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