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arm64: Utilize phys_initrd_start/phys_initrd_size

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ARM64 is the only architecture that re-defines
__early_init_dt_declare_initrd() in order for that function to populate
initrd_start/initrd_end with physical addresses instead of virtual
addresses. Instead of having an override we can leverage
drivers/of/fdt.c populating phys_initrd_start/phys_initrd_size to
populate those variables for us.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Florian Fainelli 2018-11-05 14:54:29 -08:00 committed by Rob Herring
parent fe7db75703
commit c756c592e4
1 changed files with 8 additions and 12 deletions
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20
arch/arm64/mm/init.c
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@ -71,8 +71,8 @@ static int __init early_initrd(char *p)
if (*endp == ',') {
size = memparse(endp + 1, NULL);
initrd_start = start;
initrd_end = start + size;
phys_initrd_start = start;
phys_initrd_size = size;
}
return 0;
}
@ -407,14 +407,14 @@ void __init arm64_memblock_init(void)
memblock_add(__pa_symbol(_text), (u64)(_end - _text));
}
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && initrd_start) {
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && phys_initrd_size) {
/*
* Add back the memory we just removed if it results in the
* initrd to become inaccessible via the linear mapping.
* Otherwise, this is a no-op
*/
u64 base = initrd_start & PAGE_MASK;
u64 size = PAGE_ALIGN(initrd_end) - base;
u64 base = phys_initrd_start & PAGE_MASK;
u64 size = PAGE_ALIGN(phys_initrd_size);
/*
* We can only add back the initrd memory if we don't end up
@ -458,15 +458,11 @@ void __init arm64_memblock_init(void)
* pagetables with memblock.
*/
memblock_reserve(__pa_symbol(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start) {
memblock_reserve(initrd_start, initrd_end - initrd_start);
if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && phys_initrd_size) {
/* the generic initrd code expects virtual addresses */
initrd_start = __phys_to_virt(initrd_start);
initrd_end = __phys_to_virt(initrd_end);
initrd_start = __phys_to_virt(phys_initrd_start);
initrd_end = initrd_start + phys_initrd_size;
}
#endif
early_init_fdt_scan_reserved_mem();