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31 ******************************************************************************/
32 /*****************************************************************************/
36 * This file provides APIs for enabling/disabling MMU and setting the memory
37 * attributes for sections, in the MMU translation table.
38 * MMU APIs are yet to be implemented. They are left blank to avoid any
42 * MODIFICATION HISTORY:
44 * Ver Who Date Changes
45 * ----- ---- -------- ---------------------------------------------------
46 * 5.00 pkp 05/29/14 First release
53 ******************************************************************************/
55 /***************************** Include Files *********************************/
57 #include "xil_cache.h"
58 #include "xpseudo_asm.h"
59 #include "xil_types.h"
62 /***************** Macros (Inline Functions) Definitions *********************/
64 /**************************** Type Definitions *******************************/
66 /************************** Constant Definitions *****************************/
68 /************************** Variable Definitions *****************************/
70 extern INTPTR MMUTableL1;
71 extern INTPTR MMUTableL2;
72 /************************** Function Prototypes ******************************/
73 /*****************************************************************************
75 * Set the memory attributes for a section, in the translation table.
77 * @param addr is the address for which attributes are to be set.
78 * @param attrib specifies the attributes for that memory region.
82 * @note The MMU and D-cache need not be disabled before changing an
83 * translation table attribute.
85 ******************************************************************************/
87 void Xil_SetTlbAttributes(INTPTR Addr, u64 attrib)
91 /* if region is less than 4GB MMUTable level 2 need to be modified */
93 section = Addr / 0x00200000U;
94 ptr = &MMUTableL2 + section;
95 *ptr = (Addr & (~0x001FFFFFU)) | attrib;
97 /* if region is greater than 4GB MMUTable level 1 need to be modified */
99 section = Addr / 0x40000000U;
100 ptr = &MMUTableL1 + section;
101 *ptr = (Addr & (~0x3FFFFFFFU)) | attrib;
107 dsb(); /* ensure completion of the BP and TLB invalidation */
108 isb(); /* synchronize context on this processor */