diff options
| author | Mark Salter <msalter@redhat.com> | 2015-03-24 14:02:38 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-03-25 11:49:30 +0000 |
| commit | 652261a7a86c884147930fa1e5ddd82a8a5748da (patch) | |
| tree | 835b7489753d4a472301ccc104d5c295994ab0f6 /arch/arm64/include | |
| parent | 37655163ce1a3ef2635a9bba0ad614f25e01484e (diff) | |
ACPI: fix acpi_os_ioremap for arm64
The acpi_os_ioremap() function may be used to map normal RAM or IO
regions. The current implementation simply uses ioremap_cache(). This
will work for some architectures, but arm64 ioremap_cache() cannot be
used to map IO regions which don't support caching. So for arm64, use
ioremap() for non-RAM regions.
CC: Rafael J Wysocki <rjw@rjwysocki.net>
CC: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Robert Richter <rrichter@cavium.com>
Tested-by: Timur Tabi <timur@codeaurora.org>
Acked-by: Robert Richter <rrichter@cavium.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/acpi.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index 8b837ab59988..40e092483e96 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -12,8 +12,21 @@ #ifndef _ASM_ACPI_H #define _ASM_ACPI_H +#include <linux/mm.h> + /* Basic configuration for ACPI */ #ifdef CONFIG_ACPI +/* ACPI table mapping after acpi_gbl_permanent_mmap is set */ +static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, + acpi_size size) +{ + if (!page_is_ram(phys >> PAGE_SHIFT)) + return ioremap(phys, size); + + return ioremap_cache(phys, size); +} +#define acpi_os_ioremap acpi_os_ioremap + #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ extern int acpi_disabled; extern int acpi_noirq; |