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| author | Raphael Poggi <poggi.raph@gmail.com> | 2016-07-04 13:52:53 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-07-06 11:23:49 +0200 |
| commit | 7cc98fbb6128ad015e29349370bdd582c6347e5b (patch) | |
| tree | 35db0b561c7725ea9af50a85ceeaab248e5e760c /arch/arm/include/asm/mmu.h | |
| parent | ada79ea0790fa3a7d311a985eea0eb168cb829c5 (diff) | |
| download | barebox-7cc98fbb6128ad015e29349370bdd582c6347e5b.tar.gz barebox-7cc98fbb6128ad015e29349370bdd582c6347e5b.tar.xz | |
arm: cpu: add basic arm64 mmu support
This commit adds basic mmu support, ie:
- DMA cache handling is not supported
- Remapping memory region also
The current mmu setting is:
- 4KB granularity
- 3 level lookup (skipping L0)
- 33 bits per VA
This is based on coreboot and u-boot mmu configuration.
Signed-off-by: Raphael Poggi <poggi.raph@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/include/asm/mmu.h')
| -rw-r--r-- | arch/arm/include/asm/mmu.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h index 8de6544657..f68ab37143 100644 --- a/arch/arm/include/asm/mmu.h +++ b/arch/arm/include/asm/mmu.h @@ -6,16 +6,24 @@ #include <malloc.h> #include <xfuncs.h> +#ifdef CONFIG_CPU_64v8 +#include <asm/pgtable64.h> + +#define DEV_MEM (PMD_ATTRINDX(MT_DEVICE_nGnRnE) | PMD_SECT_AF | PMD_TYPE_SECT) +#define CACHED_MEM (PMD_ATTRINDX(MT_NORMAL) | PMD_SECT_S | PMD_SECT_AF | PMD_TYPE_SECT) +#define UNCACHED_MEM (PMD_ATTRINDX(MT_NORMAL_NC) | PMD_SECT_S | PMD_SECT_AF | PMD_TYPE_SECT) +#else #include <asm/pgtable.h> #define PMD_SECT_DEF_UNCACHED (PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT) #define PMD_SECT_DEF_CACHED (PMD_SECT_WB | PMD_SECT_DEF_UNCACHED) +#endif + + struct arm_memory; -static inline void mmu_enable(void) -{ -} +void mmu_enable(void); void mmu_disable(void); static inline void arm_create_section(unsigned long virt, unsigned long phys, int size_m, unsigned int flags) |