diff options
| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2018-04-03 10:39:23 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2018-05-19 11:53:46 +0100 |
| commit | 046835b4aa22b9ab6aa0bb274e3b71047c4b887d (patch) | |
| tree | 1f1e8dc8ed4c30f03ba51d930a6f79a923959937 /arch/arm/mm/nommu.c | |
| parent | 3c24121039c9da14692eb48f6e39565b28c0f3cf (diff) | |
| download | linux-046835b4aa22b9ab6aa0bb274e3b71047c4b887d.tar.bz2 | |
ARM: 8757/1: NOMMU: Support PMSAv8 MPU
ARMv8R/M architecture defines new memory protection scheme - PMSAv8
which is not compatible with PMSAv7.
Key differences to PMSAv7 are:
- Region geometry is defined by base and limit addresses
- Addresses need to be either 32 or 64 byte aligned
- No region priority due to overlapping regions are not allowed
- It is unified, i.e. no distinction between data/instruction regions
- Memory attributes are controlled via MAIR
This patch implements support for PMSAv8 MPU defined by ARMv8R/M
architecture.
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/mm/nommu.c')
| -rw-r--r-- | arch/arm/mm/nommu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c index edbaa47be160..5dd6c58d653b 100644 --- a/arch/arm/mm/nommu.c +++ b/arch/arm/mm/nommu.c @@ -107,6 +107,9 @@ static void __init adjust_lowmem_bounds_mpu(void) case MMFR0_PMSAv7: pmsav7_adjust_lowmem_bounds(); break; + case MMFR0_PMSAv8: + pmsav8_adjust_lowmem_bounds(); + break; default: break; } @@ -120,6 +123,9 @@ static void __init mpu_setup(void) case MMFR0_PMSAv7: pmsav7_setup(); break; + case MMFR0_PMSAv8: + pmsav8_setup(); + break; default: break; } |