Commit 3f148d6b authored by Chekhov Ma's avatar Chekhov Ma Committed by Fabio Baltieri
Browse files

arch: arm: mmu: generate mmu region entry from devicetree 



Many peripherals have multiple instances, whether each of them
are enabled are not known. Adding all available instances into
"mmu_regions" array may not be the best choice.
This commit adds a macro to generate mmu region entry in "mmu_regions"
from devicetree. Used with "DT_FOREACH_STATUS_OKAY_VARGS", it generates
mmu region entry for all nodes enabled and compatiable to a certain
driver.

Signed-off-by: default avatarChekhov Ma <chekhov.ma@nxp.com>
parent dc6e7aa4

include/zephyr/arch/arm/mmu/arm_mmu.h

+39 −0
Original line number Diff line number Diff line
@@ -67,6 +67,45 @@ 
#define MMU_REGION_FLAT_ENTRY(name, adr, sz, attrs) \

	MMU_REGION_ENTRY(name, adr, adr, sz, attrs)



/*

 * @brief Auto generate mmu region entry for node_id

 *

 * Example usage:

 *

 * @code{.c}

 *      DT_FOREACH_STATUS_OKAY_VARGS(nxp_imx_gpio,

 *				  MMU_REGION_DT_FLAT_ENTRY,

 *				 (MT_DEVICE_nGnRnE | MT_P_RW_U_NA | MT_NS))

 * @endcode

 *

 * @note  Since devicetree_generated.h does not include

 *        node_id##_P_reg_FOREACH_PROP_ELEM* definitions,

 *        we can't automate dts node with multiple reg

 *        entries.

 */

#define MMU_REGION_DT_FLAT_ENTRY(node_id, attrs)  \

	MMU_REGION_FLAT_ENTRY(DT_NODE_FULL_NAME(node_id), \

				  DT_REG_ADDR(node_id), \

				  DT_REG_SIZE(node_id), \

				  attrs),



/*

 * @brief Auto generate mmu region entry for status = "okay"

 *        nodes compatible to a driver

 *

 * Example usage:

 *

 * @code{.c}

 *      MMU_REGION_DT_COMPAT_FOREACH_FLAT_ENTRY(nxp_imx_gpio,

 *				 (MT_DEVICE_nGnRnE | MT_P_RW_U_NA | MT_NS))

 * @endcode

 *

 * @note  This is a wrapper of @ref MMU_REGION_DT_FLAT_ENTRY

 */

#define MMU_REGION_DT_COMPAT_FOREACH_FLAT_ENTRY(compat, attr) \

	DT_FOREACH_STATUS_OKAY_VARGS(compat, \

	MMU_REGION_DT_FLAT_ENTRY, attr)



/* Region definition data structure */

struct arm_mmu_region {

	/* Region Base Physical Address */

include/zephyr/arch/arm64/arm_mmu.h

+39 −0
Original line number Diff line number Diff line
@@ -207,6 +207,45 @@ struct arm_mmu_ptables { 
#define MMU_REGION_FLAT_ENTRY(name, adr, sz, attrs) \

	MMU_REGION_ENTRY(name, adr, adr, sz, attrs)



/*

 * @brief Auto generate mmu region entry for node_id

 *

 * Example usage:

 *

 * @code{.c}

 *      DT_FOREACH_STATUS_OKAY_VARGS(nxp_imx_gpio,

 *				  MMU_REGION_DT_FLAT_ENTRY,

 *				 (MT_DEVICE_nGnRnE | MT_P_RW_U_NA | MT_NS))

 * @endcode

 *

 * @note  Since devicetree_generated.h does not include

 *        node_id##_P_reg_FOREACH_PROP_ELEM* definitions,

 *        we can't automate dts node with multiple reg

 *        entries.

 */

#define MMU_REGION_DT_FLAT_ENTRY(node_id, attrs)  \

	MMU_REGION_FLAT_ENTRY(DT_NODE_FULL_NAME(node_id), \

				  DT_REG_ADDR(node_id), \

				  DT_REG_SIZE(node_id), \

				  attrs),



/*

 * @brief Auto generate mmu region entry for status = "okay"

 *        nodes compatible to a driver

 *

 * Example usage:

 *

 * @code{.c}

 *      MMU_REGION_DT_COMPAT_FOREACH_FLAT_ENTRY(nxp_imx_gpio,

 *				 (MT_DEVICE_nGnRnE | MT_P_RW_U_NA | MT_NS))

 * @endcode

 *

 * @note  This is a wrapper of @ref MMU_REGION_DT_FLAT_ENTRY

 */

#define MMU_REGION_DT_COMPAT_FOREACH_FLAT_ENTRY(compat, attr) \

	DT_FOREACH_STATUS_OKAY_VARGS(compat, \

	MMU_REGION_DT_FLAT_ENTRY, attr)



/* Kernel macros for memory attribution

 * (access permissions and cache-ability).

 *

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