AArch64 MMU configuration. More...

#include <bsp/aarch64-mmu.h>
#include <bsp/fatal.h>
#include <bsp/linker-symbols.h>
#include <bsp/start.h>
#include <rtems/score/aarch64-system-registers.h>
#include <rtems/score/assert.h>

Macros
#define	MMU_MAX_SUBTABLE_PAGE_BITS ( 3 * MMU_BITS_PER_LEVEL + MMU_PAGE_BITS )

Functions
BSP_START_TEXT_SECTION rtems_status_code	aarch64_mmu_set_translation_table_entries (aarch64_mmu_control control, const aarch64_mmu_config_entry config)
	Sets the MMU translation table entries associated with the memory region.

BSP_START_TEXT_SECTION void	aarch64_mmu_setup_translation_table (aarch64_mmu_control control, const aarch64_mmu_config_entry config_table, size_t config_count)
	Sets up the MMU translation table.

Variables
aarch64_mmu_control	aarch64_mmu_instance
	This object is used to maintain the MMU translation tables.

Detailed Description

AArch64 MMU configuration.

Function Documentation

◆ aarch64_mmu_set_translation_table_entries()

BSP_START_TEXT_SECTION rtems_status_code aarch64_mmu_set_translation_table_entries	(	aarch64_mmu_control *	control,
		const aarch64_mmu_config_entry *	config
	)

Sets the MMU translation table entries associated with the memory region.

Parameters

[in,out]	control	is a reference to the MMU control state.
[in]	config	is the configuration entry with the memory region and region attributes.

Return values

RTEMS_SUCCESSFUL	The requested operation was successful.
RTEMS_INVALID_ADDRESS	The begin address of the memory region cannot be mapped by the MMU.
RTEMS_INVALID_SIZE	The end address of the memory region cannot be mapped by the MMU.
RTEMS_TOO_MANY	There was no page table entry available to perform the mapping.

◆ aarch64_mmu_setup_translation_table()

BSP_START_TEXT_SECTION void aarch64_mmu_setup_translation_table	(	aarch64_mmu_control *	control,
		const aarch64_mmu_config_entry *	config_table,
		size_t	config_count
	)

Sets up the MMU translation table.

The memory regions of the configuration table are mapped by the MMU. If a mapping is infeasible, then the BSP fatal error AARCH64_FATAL_MMU_CANNOT_MAP_BLOCK will be issued.

Parameters

[in,out]	control	is a reference to the MMU control state.
[in]	config_table	is the configuration table with memory regions and region attributes.
	config_count	is the count of configuration table entries.

Variable Documentation

◆ aarch64_mmu_instance

aarch64_mmu_control aarch64_mmu_instance

Initial value:

= {
  .ttb = (uint64_t *) bsp_translation_table_base,
 
  
  .used_page_tables = 1
}

This object is used to maintain the MMU translation tables.

Macros