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| author | Andres Salomon <dilinger@queued.net> | 2010-11-17 06:09:52 +0000 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-12-15 17:11:30 -0800 |
| commit | c10d1e260f7cb6766dc76b4e36ed8f4be53f195a (patch) | |
| tree | bcbeb1e08d65cd24a4c471d0fe8345ada28a076e /arch/x86/include/asm/olpc_ofw.h | |
| parent | 4722d194e648fb5755faecee895b96b26f9732f3 (diff) | |
| download | linux-c10d1e260f7cb6766dc76b4e36ed8f4be53f195a.tar.gz linux-c10d1e260f7cb6766dc76b4e36ed8f4be53f195a.tar.bz2 linux-c10d1e260f7cb6766dc76b4e36ed8f4be53f195a.zip | |
x86, olpc: Add OLPC device-tree support
Make use of PROC_DEVICETREE to export the tree, and sparc's PROMTREE code to
call into OLPC's Open Firmware to build the tree.
v5: fix buglet with root node check (introduced in v4)
v4: address some minor style issues pointed out by Grant, and explicitly cast
negative phandle checks to s32.
v3: rename olpc_prom to olpc_dt
- rework Kconfig entries
- drop devtree build hook from proc, instead adding a call to x86's
paging_init (similarly to how sparc64 does it)
- switch allocation from using slab to alloc_bootmem. this allows
the DT to be built earlier during boot (during setup_arch); the
downside is that there are some 1200 bootmem reservations that are
done during boot. Not ideal..
- add a helper olpc_ofw_is_installed function to test for the
existence and successful detection of OLPC's OFW.
Signed-off-by: Andres Salomon <dilinger@queued.net>
LKML-Reference: <20101116220952.26526a80@queued.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/olpc_ofw.h')
| -rw-r--r-- | arch/x86/include/asm/olpc_ofw.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/asm/olpc_ofw.h b/arch/x86/include/asm/olpc_ofw.h index 2a8478140bb3..641988efe063 100644 --- a/arch/x86/include/asm/olpc_ofw.h +++ b/arch/x86/include/asm/olpc_ofw.h @@ -8,6 +8,8 @@ #ifdef CONFIG_OLPC_OPENFIRMWARE +extern bool olpc_ofw_is_installed(void); + /* run an OFW command by calling into the firmware */ #define olpc_ofw(name, args, res) \ __olpc_ofw((name), ARRAY_SIZE(args), args, ARRAY_SIZE(res), res) @@ -26,10 +28,17 @@ extern bool olpc_ofw_present(void); #else /* !CONFIG_OLPC_OPENFIRMWARE */ +static inline bool olpc_ofw_is_installed(void) { return false; } static inline void olpc_ofw_detect(void) { } static inline void setup_olpc_ofw_pgd(void) { } static inline bool olpc_ofw_present(void) { return false; } #endif /* !CONFIG_OLPC_OPENFIRMWARE */ +#ifdef CONFIG_OLPC_OPENFIRMWARE_DT +extern void olpc_dt_build_devicetree(void); +#else +static inline void olpc_dt_build_devicetree(void) { } +#endif /* CONFIG_OLPC_OPENFIRMWARE_DT */ + #endif /* _ASM_X86_OLPC_OFW_H */ |