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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 #define BLOCK_SIZE_2MB 0x200000U
69 #define BLOCK_SIZE_1GB 0x40000000U
70 #define ADDRESS_LIMIT_4GB 0x100000000UL
72 /************************** Variable Definitions *****************************/
74 extern INTPTR MMUTableL1;
75 extern INTPTR MMUTableL2;
77 /************************** Function Prototypes ******************************/
78 /*****************************************************************************
80 * Set the memory attributes for a section, in the translation table.
82 * @param addr is the address for which attributes are to be set.
83 * @param attrib specifies the attributes for that memory region.
87 * @note The MMU and D-cache need not be disabled before changing an
88 * translation table attribute.
90 ******************************************************************************/
92 void Xil_SetTlbAttributes(INTPTR Addr, u64 attrib)
97 /* if region is less than 4GB MMUTable level 2 need to be modified */
98 if(Addr < ADDRESS_LIMIT_4GB){
99 /* block size is 2MB for addressed < 4GB*/
100 block_size = BLOCK_SIZE_2MB;
101 section = Addr / block_size;
102 ptr = &MMUTableL2 + section;
104 /* if region is greater than 4GB MMUTable level 1 need to be modified */
106 /* block size is 1GB for addressed > 4GB */
107 block_size = BLOCK_SIZE_1GB;
108 section = Addr / block_size;
109 ptr = &MMUTableL1 + section;
111 *ptr = (Addr & (~(block_size-1))) | attrib;
116 dsb(); /* ensure completion of the BP and TLB invalidation */
117 isb(); /* synchronize context on this processor */