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of/fdt: factor out assignment of initrd_start/initrd_end

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Since architectures may not yet have their linear mapping up and running
when the initrd address is discovered from the DT, factor out the
assignment of initrd_start and initrd_end, so that an architecture can
override it and use the translation it needs.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel 2016-02-16 13:52:33 +01:00 committed by Catalin Marinas
parent 270522a04f
commit 369bc9abf2
1 changed files with 11 additions and 3 deletions
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14
drivers/of/fdt.c
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@ -760,6 +760,16 @@ const void * __init of_flat_dt_match_machine(const void *default_match,
}
#ifdef CONFIG_BLK_DEV_INITRD
#ifndef __early_init_dt_declare_initrd
static void __early_init_dt_declare_initrd(unsigned long start,
unsigned long end)
{
initrd_start = (unsigned long)__va(start);
initrd_end = (unsigned long)__va(end);
initrd_below_start_ok = 1;
}
#endif
/**
* early_init_dt_check_for_initrd - Decode initrd location from flat tree
* @node: reference to node containing initrd location ('chosen')
@ -782,9 +792,7 @@ static void __init early_init_dt_check_for_initrd(unsigned long node)
return;
end = of_read_number(prop, len/4);
initrd_start = (unsigned long)__va(start);
initrd_end = (unsigned long)__va(end);
initrd_below_start_ok = 1;
__early_init_dt_declare_initrd(start, end);
pr_debug("initrd_start=0x%llx initrd_end=0x%llx\n",
(unsigned long long)start, (unsigned long long)end);