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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2018-04-03 11:39:23 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2018-05-19 12:53:46 +0200 |
| commit | 046835b4aa22b9ab6aa0bb274e3b71047c4b887d (patch) | |
| tree | 1f1e8dc8ed4c30f03ba51d930a6f79a923959937 /arch/arm/include/asm/v7m.h | |
| parent | ARM: 8756/1: NOMMU: Postpone MPU activation till __after_proc_init (diff) | |
| download | linux-046835b4aa22b9ab6aa0bb274e3b71047c4b887d.tar.xz linux-046835b4aa22b9ab6aa0bb274e3b71047c4b887d.zip | |
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/include/asm/v7m.h')
| -rw-r--r-- | arch/arm/include/asm/v7m.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/include/asm/v7m.h b/arch/arm/include/asm/v7m.h index aba49e0b3ebe..187ccf6496ad 100644 --- a/arch/arm/include/asm/v7m.h +++ b/arch/arm/include/asm/v7m.h @@ -68,6 +68,14 @@ #define PMSAv7_RBAR 0x9c #define PMSAv7_RASR 0xa0 +#define PMSAv8_RNR 0x98 +#define PMSAv8_RBAR 0x9c +#define PMSAv8_RLAR 0xa0 +#define PMSAv8_RBAR_A(n) (PMSAv8_RBAR + 8*(n)) +#define PMSAv8_RLAR_A(n) (PMSAv8_RLAR + 8*(n)) +#define PMSAv8_MAIR0 0xc0 +#define PMSAv8_MAIR1 0xc4 + /* Cache opeartions */ #define V7M_SCB_ICIALLU 0x250 /* I-cache invalidate all to PoU */ #define V7M_SCB_ICIMVAU 0x258 /* I-cache invalidate by MVA to PoU */ |