MMU Functions provide control of the Memory Management Unit using translation tables and attributes of different regions of the physical memory map.
Reference: Architecture Reference Manual Reference Manual - Armv7-A and Armv7-R edition.
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Content | |
MMU Defines and Structs | |
Defines and structures that relate to the Memory Management Unit. | |
Functions | |
__STATIC_INLINE int | MMU_XNSection (uint32_t *descriptor_l1, mmu_execute_Type xn) |
Set section execution-never attribute. | |
__STATIC_INLINE int | MMU_DomainSection (uint32_t *descriptor_l1, uint8_t domain) |
Set section domain. | |
__STATIC_INLINE int | MMU_PSection (uint32_t *descriptor_l1, mmu_ecc_check_Type p_bit) |
Set section parity check. | |
__STATIC_INLINE int | MMU_APSection (uint32_t *descriptor_l1, mmu_access_Type user, mmu_access_Type priv, uint32_t afe) |
Set section access privileges. | |
__STATIC_INLINE int | MMU_SharedSection (uint32_t *descriptor_l1, mmu_shared_Type s_bit) |
Set section shareability. | |
__STATIC_INLINE int | MMU_GlobalSection (uint32_t *descriptor_l1, mmu_global_Type g_bit) |
Set section Global attribute. | |
__STATIC_INLINE int | MMU_SecureSection (uint32_t *descriptor_l1, mmu_secure_Type s_bit) |
Set section Security attribute. | |
__STATIC_INLINE int | MMU_XNPage (uint32_t *descriptor_l2, mmu_execute_Type xn, mmu_region_size_Type page) |
Set 4k/64k page execution-never attribute. | |
__STATIC_INLINE int | MMU_DomainPage (uint32_t *descriptor_l1, uint8_t domain) |
Set 4k/64k page domain. | |
__STATIC_INLINE int | MMU_PPage (uint32_t *descriptor_l1, mmu_ecc_check_Type p_bit) |
Set 4k/64k page parity check. | |
__STATIC_INLINE int | MMU_APPage (uint32_t *descriptor_l2, mmu_access_Type user, mmu_access_Type priv, uint32_t afe) |
Set 4k/64k page access privileges. | |
__STATIC_INLINE int | MMU_SharedPage (uint32_t *descriptor_l2, mmu_shared_Type s_bit) |
Set 4k/64k page shareability. | |
__STATIC_INLINE int | MMU_GlobalPage (uint32_t *descriptor_l2, mmu_global_Type g_bit) |
Set 4k/64k page Global attribute. | |
__STATIC_INLINE int | MMU_SecurePage (uint32_t *descriptor_l1, mmu_secure_Type s_bit) |
Set 4k/64k page Security attribute. | |
__STATIC_INLINE int | MMU_MemorySection (uint32_t *descriptor_l1, mmu_memory_Type mem, mmu_cacheability_Type outer, mmu_cacheability_Type inner) |
Set Section memory attributes. | |
__STATIC_INLINE int | MMU_MemoryPage (uint32_t *descriptor_l2, mmu_memory_Type mem, mmu_cacheability_Type outer, mmu_cacheability_Type inner, mmu_region_size_Type page) |
Set 4k/64k page memory attributes. | |
__STATIC_INLINE int | MMU_GetSectionDescriptor (uint32_t *descriptor, mmu_region_attributes_Type reg) |
Create a L1 section descriptor. | |
__STATIC_INLINE int | MMU_GetPageDescriptor (uint32_t *descriptor, uint32_t *descriptor2, mmu_region_attributes_Type reg) |
Create a L1 and L2 4k/64k page descriptor. | |
__STATIC_INLINE void | MMU_TTSection (uint32_t *ttb, uint32_t base_address, uint32_t count, uint32_t descriptor_l1) |
Create a 1MB Section. | |
__STATIC_INLINE void | MMU_TTPage4k (uint32_t *ttb, uint32_t base_address, uint32_t count, uint32_t descriptor_l1, uint32_t *ttb_l2, uint32_t descriptor_l2) |
Create a 4k page entry. | |
__STATIC_INLINE void | MMU_TTPage64k (uint32_t *ttb, uint32_t base_address, uint32_t count, uint32_t descriptor_l1, uint32_t *ttb_l2, uint32_t descriptor_l2) |
Create a 64k page entry. | |
__STATIC_INLINE void | MMU_Enable (void) |
Enable MMU. | |
__STATIC_INLINE void | MMU_Disable (void) |
Disable MMU. | |
__STATIC_INLINE void | MMU_InvalidateTLB (void) |
Invalidate entire unified TLB. | |
MMU Functions provide control of the Memory Management Unit using translation tables and attributes of different regions of the physical memory map.
Reference: Architecture Reference Manual Reference Manual - Armv7-A and Armv7-R edition.
__STATIC_INLINE int MMU_APPage | ( | uint32_t * | descriptor_l2, |
mmu_access_Type | user, | ||
mmu_access_Type | priv, | ||
uint32_t | afe | ||
) |
Set 4k/64k page access privileges.
[out] | descriptor_l2 | L2 descriptor. |
[in] | user | User Level Access: NO_ACCESS, RW, READ |
[in] | priv | Privilege Level Access: NO_ACCESS, RW, READ |
[in] | afe | Access flag enable |
The function sets 4k/64k page access privileges
__STATIC_INLINE int MMU_APSection | ( | uint32_t * | descriptor_l1, |
mmu_access_Type | user, | ||
mmu_access_Type | priv, | ||
uint32_t | afe | ||
) |
Set section access privileges.
[out] | descriptor_l1 | L1 descriptor. |
[in] | user | User Level Access: NO_ACCESS, RW, READ |
[in] | priv | Privilege Level Access: NO_ACCESS, RW, READ |
[in] | afe | Access flag enable |
The function sets section access privileges
__STATIC_INLINE void MMU_Disable | ( | void | ) |
Disable MMU.
__STATIC_INLINE int MMU_DomainPage | ( | uint32_t * | descriptor_l1, |
uint8_t | domain | ||
) |
Set 4k/64k page domain.
[out] | descriptor_l1 | L1 descriptor. |
[in] | domain | Page domain |
The function sets 4k/64k page domain
__STATIC_INLINE int MMU_DomainSection | ( | uint32_t * | descriptor_l1, |
uint8_t | domain | ||
) |
Set section domain.
[out] | descriptor_l1 | L1 descriptor. |
[in] | domain | Section domain |
The function sets section domain.
__STATIC_INLINE void MMU_Enable | ( | void | ) |
Enable MMU.
Set M bit 0 to enable the MMU Set AFE bit to enable simplified access permissions model Clear TRE bit to disable TEX remap and A bit to disable strict alignment fault checking
__STATIC_INLINE int MMU_GetPageDescriptor | ( | uint32_t * | descriptor, |
uint32_t * | descriptor2, | ||
mmu_region_attributes_Type | reg | ||
) |
Create a L1 and L2 4k/64k page descriptor.
[out] | descriptor | L1 descriptor |
[out] | descriptor2 | L2 descriptor |
[in] | reg | 4k/64k page attributes |
The function creates a 4k/64k page descriptor. Assumptions:
__STATIC_INLINE int MMU_GetSectionDescriptor | ( | uint32_t * | descriptor, |
mmu_region_attributes_Type | reg | ||
) |
Create a L1 section descriptor.
[out] | descriptor | L1 descriptor |
[in] | reg | Section attributes |
The function creates a section descriptor.
__STATIC_INLINE int MMU_GlobalPage | ( | uint32_t * | descriptor_l2, |
mmu_global_Type | g_bit | ||
) |
Set 4k/64k page Global attribute.
[out] | descriptor_l2 | L2 descriptor. |
[in] | g_bit | 4k/64k page attribute: GLOBAL, NON_GLOBAL |
The function sets 4k/64k page Global attribute
__STATIC_INLINE int MMU_GlobalSection | ( | uint32_t * | descriptor_l1, |
mmu_global_Type | g_bit | ||
) |
Set section Global attribute.
[out] | descriptor_l1 | L1 descriptor. |
[in] | g_bit | Section attribute: GLOBAL, NON_GLOBAL |
The function sets section Global attribute
__STATIC_INLINE void MMU_InvalidateTLB | ( | void | ) |
Invalidate entire unified TLB.
__STATIC_INLINE int MMU_MemoryPage | ( | uint32_t * | descriptor_l2, |
mmu_memory_Type | mem, | ||
mmu_cacheability_Type | outer, | ||
mmu_cacheability_Type | inner, | ||
mmu_region_size_Type | page | ||
) |
Set 4k/64k page memory attributes.
[out] | descriptor_l2 | L2 descriptor. |
[in] | mem | 4k/64k page memory type: NORMAL, DEVICE, SHARED_DEVICE, NON_SHARED_DEVICE, STRONGLY_ORDERED |
[in] | outer | Outer cacheability: NON_CACHEABLE, WB_WA, WT, WB_NO_WA, |
[in] | inner | Inner cacheability: NON_CACHEABLE, WB_WA, WT, WB_NO_WA, |
[in] | page | Page size |
The function sets 4k/64k page memory attributes
__STATIC_INLINE int MMU_MemorySection | ( | uint32_t * | descriptor_l1, |
mmu_memory_Type | mem, | ||
mmu_cacheability_Type | outer, | ||
mmu_cacheability_Type | inner | ||
) |
Set Section memory attributes.
[out] | descriptor_l1 | L1 descriptor. |
[in] | mem | Section memory type: NORMAL, DEVICE, SHARED_DEVICE, NON_SHARED_DEVICE, STRONGLY_ORDERED |
[in] | outer | Outer cacheability: NON_CACHEABLE, WB_WA, WT, WB_NO_WA, |
[in] | inner | Inner cacheability: NON_CACHEABLE, WB_WA, WT, WB_NO_WA, |
The function sets section memory attributes
__STATIC_INLINE int MMU_PPage | ( | uint32_t * | descriptor_l1, |
mmu_ecc_check_Type | p_bit | ||
) |
Set 4k/64k page parity check.
[out] | descriptor_l1 | L1 descriptor. |
[in] | p_bit | Parity check: ECC_DISABLED, ECC_ENABLED |
The function sets 4k/64k page parity check
__STATIC_INLINE int MMU_PSection | ( | uint32_t * | descriptor_l1, |
mmu_ecc_check_Type | p_bit | ||
) |
Set section parity check.
[out] | descriptor_l1 | L1 descriptor. |
[in] | p_bit | Parity check: ECC_DISABLED, ECC_ENABLED |
The function sets section parity check
__STATIC_INLINE int MMU_SecurePage | ( | uint32_t * | descriptor_l1, |
mmu_secure_Type | s_bit | ||
) |
Set 4k/64k page Security attribute.
[out] | descriptor_l1 | L1 descriptor. |
[in] | s_bit | 4k/64k page Security attribute: SECURE, NON_SECURE |
The function sets 4k/64k page Global attribute
__STATIC_INLINE int MMU_SecureSection | ( | uint32_t * | descriptor_l1, |
mmu_secure_Type | s_bit | ||
) |
Set section Security attribute.
[out] | descriptor_l1 | L1 descriptor. |
[in] | s_bit | Section Security attribute: SECURE, NON_SECURE |
The function sets section Global attribute
__STATIC_INLINE int MMU_SharedPage | ( | uint32_t * | descriptor_l2, |
mmu_shared_Type | s_bit | ||
) |
Set 4k/64k page shareability.
[out] | descriptor_l2 | L2 descriptor. |
[in] | s_bit | 4k/64k page shareability: NON_SHARED, SHARED |
The function sets 4k/64k page shareability
__STATIC_INLINE int MMU_SharedSection | ( | uint32_t * | descriptor_l1, |
mmu_shared_Type | s_bit | ||
) |
Set section shareability.
[out] | descriptor_l1 | L1 descriptor. |
[in] | s_bit | Section shareability: NON_SHARED, SHARED |
The function sets section shareability
__STATIC_INLINE void MMU_TTPage4k | ( | uint32_t * | ttb, |
uint32_t | base_address, | ||
uint32_t | count, | ||
uint32_t | descriptor_l1, | ||
uint32_t * | ttb_l2, | ||
uint32_t | descriptor_l2 | ||
) |
Create a 4k page entry.
[in] | ttb | L1 table base address |
[in] | base_address | 4k base address |
[in] | count | Number of 4k pages to create |
[in] | descriptor_l1 | L1 descriptor (region attributes) |
[in] | ttb_l2 | L2 table base address |
[in] | descriptor_l2 | L2 descriptor (region attributes) |
__STATIC_INLINE void MMU_TTPage64k | ( | uint32_t * | ttb, |
uint32_t | base_address, | ||
uint32_t | count, | ||
uint32_t | descriptor_l1, | ||
uint32_t * | ttb_l2, | ||
uint32_t | descriptor_l2 | ||
) |
Create a 64k page entry.
[in] | ttb | L1 table base address |
[in] | base_address | 64k base address |
[in] | count | Number of 64k pages to create |
[in] | descriptor_l1 | L1 descriptor (region attributes) |
[in] | ttb_l2 | L2 table base address |
[in] | descriptor_l2 | L2 descriptor (region attributes) |
__STATIC_INLINE void MMU_TTSection | ( | uint32_t * | ttb, |
uint32_t | base_address, | ||
uint32_t | count, | ||
uint32_t | descriptor_l1 | ||
) |
Create a 1MB Section.
[in] | ttb | Translation table base address |
[in] | base_address | Section base address |
[in] | count | Number of sections to create |
[in] | descriptor_l1 | L1 descriptor (region attributes) |
__STATIC_INLINE int MMU_XNPage | ( | uint32_t * | descriptor_l2, |
mmu_execute_Type | xn, | ||
mmu_region_size_Type | page | ||
) |
Set 4k/64k page execution-never attribute.
[out] | descriptor_l2 | L2 descriptor. |
[in] | xn | Page execution-never attribute : EXECUTE , NON_EXECUTE. |
[in] | page | Page size: PAGE_4k, PAGE_64k, |
The function sets 4k/64k page execution-never attribute
__STATIC_INLINE int MMU_XNSection | ( | uint32_t * | descriptor_l1, |
mmu_execute_Type | xn | ||
) |
Set section execution-never attribute.
[out] | descriptor_l1 | L1 descriptor. |
[in] | xn | Section execution-never attribute : EXECUTE , NON_EXECUTE. |
The function sets section execution-never attribute