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AN4253 Datasheet(PDF) 35 Page - STMicroelectronics |
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AN4253 Datasheet(HTML) 35 Page - STMicroelectronics |
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35 / 44 page ![]() DocID024255 Rev 2 35/44 AN4253 asm examples mtspr 26,r31 // SRR0 mtspr 27,r31 // SRR1 mtspr 58,r31 // CSRR0 mtspr 59,r31 // CSRR1 mtspr 63,r31 // IVPR mtspr 61,r31 // DEAR mtspr 62,r31 // ESR mtspr 570,r31 // MCSRR0 mtspr 571,r31 // MCSRR1 mtspr 340,r31 // TCR mtspr 512,r31 // SPEFSCR mtspr 1,r31 // XER mtspr 256,r31 // USPRG0 mtspr 9,r31 // CTR mtspr 8,r31 // LR mtspr 308,r31 // DBCR0 mtspr 309,r31 // DBCR1 mtspr 310,r31 // DBCR2 mtspr 561,r31 // DBCR3 mtspr 563,r31 // DBCR4 mtspr 564,r31 mtspr 603,r31 A.3 MMU entry configuration // Table 0 e_lis r0, 0x1000 e_or2i r0, 0x0000 mtspr mas0, r0 // fix bits + TLB entry e_lis r0, 0xC000 e_or2i r0, 0x0500 mtspr mas1, r0 // cfg bits + Page SIZE e_lis r0, 0x0000 e_or2i r0, 0x0028 mtspr mas2, r0 // EPN + page atrib e_lis r0, 0x0000 e_or2i r0, 0x003F mtspr mas3, r0 // RPN + access atrib tlbwe A.4 SSCM HW configuration check // Base address of FLASH module to r7 e_lis r7, FLASH_BASE@h e_or2i r7, FLASH_BASE@l // Read MCR register e_lwz r0, FLASH_REG_MCR (r7) // read FLASH.MCR register // MCR.EER bit? e_lis r1, FLASH_EER_MASK@h e_or2i r1, FLASH_EER_MASK@l se_and r0, r1 // look for destructive resets se_cmpi r0,0 // is value '1' ? |
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