Device memory-mapped IO management

Modules
	Named MMIO region macros
	Single MMIO region macros
	Top-level MMIO region macros

Macros
#define	DEVICE_MMIO_IS_IN_RAM

Functions
static __boot_func void	device_map (mm_reg_t *virt_addr, uintptr_t phys_addr, size_t size, uint32_t flags)

Detailed Description

Macro Definition Documentation

DEVICE_MMIO_IS_IN_RAM

#define DEVICE_MMIO_IS_IN_RAM

#include <include/zephyr/sys/device_mmio.h>

Function Documentation

device_map()

static __boot_func void device_map ( mm_reg_t *  virt_addr, uintptr_t  phys_addr, size_t  size, uint32_t  flags  )

inlinestatic

#include <include/zephyr/sys/device_mmio.h>

Set linear address for device MMIO access

This function sets the virt_addr parameter to the correct linear address for the MMIO region.

If the MMU is enabled, mappings may be created in the page tables.

Normally, only a caching mode needs to be set for the 'flags' parameter. The mapped linear address will have read-write access to supervisor mode.

See also

k_map()

Parameters

virt_addr	[out] Output linear address storage location, most users will want some DEVICE_MMIO_RAM_PTR() value
phys_addr	Physical address base of the MMIO region
size	Size of the MMIO region
flags	Caching mode and access flags, see K_MEM_CACHE_* and K_MEM_PERM_* macros