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| author | Wojtek Kosior <kwojtus@protonmail.com> | 2019-11-09 23:57:57 +0100 |
|---|---|---|
| committer | Wojtek Kosior <kwojtus@protonmail.com> | 2019-11-09 23:57:57 +0100 |
| commit | c9a43be4dbabad0d6f51712e60f2ff0834eed36a (patch) | |
| tree | b569b0e2859e172c6e6639b3e3838099d29c6351 | |
| parent | 253e855d715cf4abebbc4b99af8870a7196c862c (diff) | |
| download | rpi-MMU-example-c9a43be4dbabad0d6f51712e60f2ff0834eed36a.tar.gz rpi-MMU-example-c9a43be4dbabad0d6f51712e60f2ff0834eed36a.zip | |
define struct for supersection
| -rw-r--r-- | translation_table_descriptors.h | 74 |
1 files changed, 56 insertions, 18 deletions
diff --git a/translation_table_descriptors.h b/translation_table_descriptors.h index 35062f8..8f92473 100644 --- a/translation_table_descriptors.h +++ b/translation_table_descriptors.h @@ -13,21 +13,21 @@ typedef struct { - uint32_t PXN : 1; // bit 0 - uint32_t Bit_1 : 1; // bit 1 - uint32_t B : 1; // bit 2 - uint32_t C : 1; // bit 3 - uint32_t XN : 1; // bit 4 - uint32_t Domain_3_0 : 4; // bits 8:5 - uint32_t Bit_9 : 1; // bit 9 - uint32_t AP_1_0 : 2; // bit 11:10 - uint32_t TEX_2_0 : 3; // bits 14:12 - uint32_t AP_2 : 1; // bit 15 - uint32_t S : 1; // bit 16 - uint32_t nG : 1; // bit 17 - uint32_t Bit_18 : 1; // bit 18 - uint32_t NS : 1; // bit 19 - uint32_t PA_31_20 : 12; // bits 31:20 + uint32_t PXN : 1; // bit 0 + uint32_t Bit_1 : 1; // bit 1 + uint32_t B : 1; // bit 2 + uint32_t C : 1; // bit 3 + uint32_t XN : 1; // bit 4 + uint32_t Domain_3_0 : 4; // bits 8:5 + uint32_t Bit_9 : 1; // bit 9 + uint32_t AP_1_0 : 2; // bit 11:10 + uint32_t TEX_2_0 : 3; // bits 14:12 + uint32_t AP_2 : 1; // bit 15 + uint32_t S : 1; // bit 16 + uint32_t nG : 1; // bit 17 + uint32_t Bit_18 : 1; // bit 18 + uint32_t NS : 1; // bit 19 + uint32_t PA_31_20 : 12; // bits 31:20 #define PRIVILEGED_EXECUTE_NEVER_BIT PXN #define DESCRIPTOR_TYPE_2 Bit_1 #define BUFFERABLE_BIT B @@ -79,12 +79,50 @@ typedef struct #define DESCRIBES_SECTION 0b0 #define DESCRIBES_SUPERSECTION 0b1 +typedef struct +{ + uint32_t PXN : 1; // bit 0 + uint32_t Bit_1 : 1; // bit 1 + uint32_t B : 1; // bit 2 + uint32_t C : 1; // bit 3 + uint32_t XN : 1; // bit 4 + uint32_t PA_39_36 : 4; // bits 8:5 + uint32_t Bit_9 : 1; // bit 9 + uint32_t AP_1_0 : 2; // bit 11:10 + uint32_t TEX_2_0 : 3; // bits 14:12 + uint32_t AP_2 : 1; // bit 15 + uint32_t S : 1; // bit 16 + uint32_t nG : 1; // bit 17 + uint32_t Bit_18 : 1; // bit 18 + uint32_t NS : 1; // bit 19 + uint32_t PA_35_32 : 4; // bits 23:20 + uint32_t PA_31_24 : 8; // bits 31:24 + // most of these are already defined the same for section + //#define PRIVILEGED_EXECUTE_NEVER_BIT PXN + //#define DESCRIPTOR_TYPE_2 Bit_1 + //#define BUFFERABLE_BIT B + //#define CACHEABLE_BIT C + //#define EXECUTE_NEVER_BIT XN +#define SUPERSECTION_BASE_ADDRESS_39_36 PA_39_36 + //#define IMPLEMENTATION_DEFINED_BIT Bit_9 + //#define ACCESS_PERMISSIONS_1_0 AP_1_0 + //#define TYPE_EXTENSION_2_0 TEX_2_0 + //#define ACCESS_PERMISSIONS_2 AP_2 + //#define SHAREABLE_BIT S + //#define NON_GLOBAL_BIT nG + //#define SECTION_OR_SUPERSECTION_BIT Bit_18 + //#define NON_SECURE_BIT NS +#define SUPERSECTION_BASE_ADDRESS_35_32 PA_35_32 +#define SUPERSECTION_BASE_ADDRESS_31_24 PA_31_24 +} short_supersection_descriptor_t; + typedef union { - uint32_t raw; - uint8_t descriptor_type; + uint32_t raw; + uint8_t descriptor_type; - short_section_descriptor_t section_fields; + short_section_descriptor_t section_fields; + short_supersection_descriptor_t supersection_fields; // more to come here (e.g. short_supersection_descriptor_t) } short_descriptor_t; |