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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-06-01 13:40:31 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-06-02 17:31:25 +0200 |
| commit | 24bbd929e6b9e62afd263c42b4318d3b603c956c (patch) | |
| tree | 78658f1cf02b8c511195ad9a6c927b71ee143625 /drivers | |
| parent | arm64: context-switch user tls register tpidr_el0 for compat tasks (diff) | |
| download | linux-24bbd929e6b9e62afd263c42b4318d3b603c956c.tar.xz linux-24bbd929e6b9e62afd263c42b4318d3b603c956c.zip | |
of/fdt: split off FDT self reservation from memreserve processing
This splits off the reservation of the memory occupied by the FDT
binary itself from the processing of the memory reservations it
contains. This is necessary because the physical address of the FDT,
which is needed to perform the reservation, may not be known to the
FDT driver core, i.e., it may be mapped outside the linear direct
mapping, in which case __pa() returns a bogus value.
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/of/fdt.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index cde35c5d0191..f2dd23a32267 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -580,11 +580,6 @@ void __init early_init_fdt_scan_reserved_mem(void) if (!initial_boot_params) return; - /* Reserve the dtb region */ - early_init_dt_reserve_memory_arch(__pa(initial_boot_params), - fdt_totalsize(initial_boot_params), - 0); - /* Process header /memreserve/ fields */ for (n = 0; ; n++) { fdt_get_mem_rsv(initial_boot_params, n, &base, &size); @@ -598,6 +593,20 @@ void __init early_init_fdt_scan_reserved_mem(void) } /** + * early_init_fdt_reserve_self() - reserve the memory used by the FDT blob + */ +void __init early_init_fdt_reserve_self(void) +{ + if (!initial_boot_params) + return; + + /* Reserve the dtb region */ + early_init_dt_reserve_memory_arch(__pa(initial_boot_params), + fdt_totalsize(initial_boot_params), + 0); +} + +/** * of_scan_flat_dt - scan flattened tree blob and call callback on each. * @it: callback function * @data: context data pointer |