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| author | Marcin Nowakowski <marcin.nowakowski@imgtec.com> | 2016-11-23 14:43:47 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-01-03 16:34:45 +0100 |
| commit | 0063fdede69b2cc6f861aab0641f7e25f451def9 (patch) | |
| tree | 7c8a5b81b27125d89297f6c6e88a173e90952389 | |
| parent | 73346081cac18732a959be580a90abc707dea52a (diff) | |
| download | talos-obmc-linux-0063fdede69b2cc6f861aab0641f7e25f451def9.tar.gz talos-obmc-linux-0063fdede69b2cc6f861aab0641f7e25f451def9.zip | |
MIPS: platform: Allow for DTB to be moved during kernel relocation
Add plat_fdt_relocated(void*) API to allow the kernel relocation code to
update platform's information about the DTB location if the DTB had to
be moved due to being placed in a location used by the relocated kernel.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14611/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/generic/init.c | 13 | ||||
| -rw-r--r-- | arch/mips/include/asm/bootinfo.h | 13 |
2 files changed, 26 insertions, 0 deletions
diff --git a/arch/mips/generic/init.c b/arch/mips/generic/init.c index d493ccbf274a..4af619215410 100644 --- a/arch/mips/generic/init.c +++ b/arch/mips/generic/init.c @@ -88,6 +88,19 @@ void __init *plat_get_fdt(void) return (void *)fdt; } +void __init plat_fdt_relocated(void *new_location) +{ + /* + * reset fdt as the cached value would point to the location + * before relocations happened and update the location argument + * if it was passed using UHI + */ + fdt = NULL; + + if (fw_arg0 == -2) + fw_arg1 = (unsigned long)new_location; +} + void __init plat_mem_setup(void) { if (mach && mach->fixup_fdt) diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h index ee9f5f2d18fc..e26a093bb17a 100644 --- a/arch/mips/include/asm/bootinfo.h +++ b/arch/mips/include/asm/bootinfo.h @@ -164,6 +164,19 @@ static inline void plat_swiotlb_setup(void) {} * Return: Pointer to the flattened device tree blob. */ extern void *plat_get_fdt(void); + +#ifdef CONFIG_RELOCATABLE + +/** + * plat_fdt_relocated() - Update platform's information about relocated dtb + * + * This function provides a platform-independent API to set platform's + * information about relocated DTB if it needs to be moved due to kernel + * relocation occurring at boot. + */ +void plat_fdt_relocated(void *new_location); + +#endif /* CONFIG_RELOCATABLE */ #endif /* CONFIG_USE_OF */ #endif /* _ASM_BOOTINFO_H */ |
