xtensa_mmu.h File Reference

#include <stdint.h>

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Data Structures
struct	xtensa_mmu_range
	Struct used to map a memory region. More...

Macros
#define	XTENSA_MMU_MAP_USER   BIT(4)
	Software only bit to indicate a memory region can be accessed by user thread(s).
#define	XTENSA_MMU_MAP_SHARED   BIT(30)
	Software only bit to indicate a memory region is shared by all threads.
Memory region permission and caching mode.
#define	XTENSA_MMU_PERM_X   BIT(0)
	Memory region is executable.
#define	XTENSA_MMU_PERM_W   BIT(1)
	Memory region is writable.
#define	XTENSA_MMU_PERM_WX   (XTENSA_MMU_PERM_W | XTENSA_MMU_PERM_X)
	Memory region is both executable and writable.
#define	XTENSA_MMU_CACHED_WB   BIT(2)
	Memory region has write-back cache.
#define	XTENSA_MMU_CACHED_WT   BIT(3)
	Memory region has write-through cache.

Functions
void	xtensa_mmu_init (void)
	Initialize hardware MMU.
void	xtensa_mmu_reinit (void)
	Re-initialize hardware MMU.
void	xtensa_mmu_tlb_ipi (void)
	Tell other processors to flush TLBs.
void	xtensa_mmu_tlb_shootdown (void)
	Invalidate cache to page tables and flush TLBs.

Variables
const struct xtensa_mmu_range	xtensa_soc_mmu_ranges []
	Additional memory regions required by SoC.
int	xtensa_soc_mmu_ranges_num
	Number of SoC additional memory regions.

Memory domain and partitions
#define	K_MEM_PARTITION_IS_EXECUTABLE(attr)   (((attr) & XTENSA_MMU_PERM_X) != 0)
#define	K_MEM_PARTITION_IS_WRITABLE(attr)   (((attr) & XTENSA_MMU_PERM_W) != 0)
#define	K_MEM_PARTITION_IS_USER(attr)   (((attr) & XTENSA_MMU_MAP_USER) != 0)
#define	K_MEM_PARTITION_P_RW_U_RW    ((k_mem_partition_attr_t) {XTENSA_MMU_PERM_W | XTENSA_MMU_MAP_USER})
#define	K_MEM_PARTITION_P_RW_U_NA    ((k_mem_partition_attr_t) {0})
#define	K_MEM_PARTITION_P_RO_U_RO    ((k_mem_partition_attr_t) {XTENSA_MMU_MAP_USER})
#define	K_MEM_PARTITION_P_RO_U_NA    ((k_mem_partition_attr_t) {0})
#define	K_MEM_PARTITION_P_NA_U_NA    ((k_mem_partition_attr_t) {0})
#define	K_MEM_PARTITION_P_RX_U_RX    ((k_mem_partition_attr_t) {XTENSA_MMU_PERM_X})
typedef uint32_t	k_mem_partition_attr_t