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1.1 ! root 1: /* ! 2: * Taken from kernel for decoupling from <asm/page.h>. --zaitcev ! 3: * ! 4: * $Id: pgtsrmmu.h,v 1.2 1999/04/19 01:04:31 zaitcev Exp $ ! 5: * pgtsrmmu.h: SRMMU page table defines and code. ! 6: * ! 7: * Copyright (C) 1995 David S. Miller ([email protected]) ! 8: */ ! 9: ! 10: #ifndef _PGTSRMMU_H ! 11: #define _PGTSRMMU_H ! 12: ! 13: /* PMD_SHIFT determines the size of the area a second-level page table can map */ ! 14: #define SRMMU_PMD_SHIFT 18 ! 15: #define SRMMU_PMD_SIZE (1UL << SRMMU_PMD_SHIFT) ! 16: #define SRMMU_PMD_MASK (~(SRMMU_PMD_SIZE-1)) ! 17: #define SRMMU_PMD_ALIGN(addr) (((addr)+SRMMU_PMD_SIZE-1)&SRMMU_PMD_MASK) ! 18: ! 19: /* PGDIR_SHIFT determines what a third-level page table entry can map */ ! 20: #define SRMMU_PGDIR_SHIFT 24 ! 21: #define SRMMU_PGDIR_SIZE (1UL << SRMMU_PGDIR_SHIFT) ! 22: #define SRMMU_PGDIR_MASK (~(SRMMU_PGDIR_SIZE-1)) ! 23: #define SRMMU_PGDIR_ALIGN(addr) (((addr)+SRMMU_PGDIR_SIZE-1)&SRMMU_PGDIR_MASK) ! 24: ! 25: #define SRMMU_PTRS_PER_PTE 64 ! 26: #define SRMMU_PTRS_PER_PMD 64 ! 27: #define SRMMU_PTRS_PER_PGD 256 ! 28: ! 29: #define SRMMU_PTE_TABLE_SIZE 0x100 /* 64 entries, 4 bytes a piece */ ! 30: #define SRMMU_PMD_TABLE_SIZE 0x100 /* 64 entries, 4 bytes a piece */ ! 31: #define SRMMU_PGD_TABLE_SIZE 0x400 /* 256 entries, 4 bytes a piece */ ! 32: ! 33: #define SRMMU_VMALLOC_START (0xfe300000) ! 34: #define SRMMU_VMALLOC_END ~0x0UL ! 35: ! 36: /* Definition of the values in the ET field of PTD's and PTE's */ ! 37: #define SRMMU_ET_MASK 0x3 ! 38: #define SRMMU_ET_INVALID 0x0 ! 39: #define SRMMU_ET_PTD 0x1 ! 40: #define SRMMU_ET_PTE 0x2 ! 41: #define SRMMU_ET_REPTE 0x3 /* AIEEE, SuperSparc II reverse endian page! */ ! 42: ! 43: /* Physical page extraction from PTP's and PTE's. */ ! 44: #define SRMMU_CTX_PMASK 0xfffffff0 ! 45: #define SRMMU_PTD_PMASK 0xfffffff0 ! 46: #define SRMMU_PTE_PMASK 0xffffff00 ! 47: ! 48: /* The pte non-page bits. Some notes: ! 49: * 1) cache, dirty, valid, and ref are frobbable ! 50: * for both supervisor and user pages. ! 51: * 2) exec and write will only give the desired effect ! 52: * on user pages ! 53: * 3) use priv and priv_readonly for changing the ! 54: * characteristics of supervisor ptes ! 55: */ ! 56: #define SRMMU_CACHE 0x80 ! 57: #define SRMMU_DIRTY 0x40 ! 58: #define SRMMU_REF 0x20 ! 59: #define SRMMU_EXEC 0x08 ! 60: #define SRMMU_WRITE 0x04 ! 61: #define SRMMU_VALID 0x02 /* SRMMU_ET_PTE */ ! 62: #define SRMMU_PRIV 0x1c ! 63: #define SRMMU_PRIV_RDONLY 0x18 ! 64: ! 65: #define SRMMU_CHG_MASK (0xffffff00 | SRMMU_REF | SRMMU_DIRTY) ! 66: ! 67: /* SRMMU Register addresses in ASI 0x4. These are valid for all ! 68: * current SRMMU implementations that exist. ! 69: */ ! 70: #define SRMMU_CTRL_REG 0x00000000 ! 71: #define SRMMU_CTXTBL_PTR 0x00000100 ! 72: #define SRMMU_CTX_REG 0x00000200 ! 73: #define SRMMU_FAULT_STATUS 0x00000300 ! 74: #define SRMMU_FAULT_ADDR 0x00000400 ! 75: ! 76: #ifndef __ASSEMBLY__ ! 77: ! 78: /* Accessing the MMU control register. */ ! 79: static __inline__ unsigned int srmmu_get_mmureg(void) ! 80: { ! 81: unsigned int retval; ! 82: __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : ! 83: "=r" (retval) : ! 84: "i" (ASI_M_MMUREGS)); ! 85: return retval; ! 86: } ! 87: ! 88: static __inline__ void srmmu_set_mmureg(unsigned long regval) ! 89: { ! 90: __asm__ __volatile__("sta %0, [%%g0] %1\n\t" : : ! 91: "r" (regval), "i" (ASI_M_MMUREGS) : "memory"); ! 92: ! 93: } ! 94: ! 95: static __inline__ void srmmu_set_ctable_ptr(unsigned long paddr) ! 96: { ! 97: paddr = ((paddr >> 4) & SRMMU_CTX_PMASK); ! 98: __asm__ __volatile__("sta %0, [%1] %2\n\t" : : ! 99: "r" (paddr), "r" (SRMMU_CTXTBL_PTR), ! 100: "i" (ASI_M_MMUREGS) : ! 101: "memory"); ! 102: } ! 103: ! 104: static __inline__ unsigned long srmmu_get_ctable_ptr(void) ! 105: { ! 106: unsigned int retval; ! 107: ! 108: __asm__ __volatile__("lda [%1] %2, %0\n\t" : ! 109: "=r" (retval) : ! 110: "r" (SRMMU_CTXTBL_PTR), ! 111: "i" (ASI_M_MMUREGS)); ! 112: return (retval & SRMMU_CTX_PMASK) << 4; ! 113: } ! 114: ! 115: static __inline__ void srmmu_set_context(int context) ! 116: { ! 117: __asm__ __volatile__("sta %0, [%1] %2\n\t" : : ! 118: "r" (context), "r" (SRMMU_CTX_REG), ! 119: "i" (ASI_M_MMUREGS) : "memory"); ! 120: } ! 121: ! 122: static __inline__ int srmmu_get_context(void) ! 123: { ! 124: register int retval; ! 125: __asm__ __volatile__("lda [%1] %2, %0\n\t" : ! 126: "=r" (retval) : ! 127: "r" (SRMMU_CTX_REG), ! 128: "i" (ASI_M_MMUREGS)); ! 129: return retval; ! 130: } ! 131: ! 132: static __inline__ unsigned int srmmu_get_fstatus(void) ! 133: { ! 134: unsigned int retval; ! 135: ! 136: __asm__ __volatile__("lda [%1] %2, %0\n\t" : ! 137: "=r" (retval) : ! 138: "r" (SRMMU_FAULT_STATUS), "i" (ASI_M_MMUREGS)); ! 139: return retval; ! 140: } ! 141: ! 142: static __inline__ unsigned int srmmu_get_faddr(void) ! 143: { ! 144: unsigned int retval; ! 145: ! 146: __asm__ __volatile__("lda [%1] %2, %0\n\t" : ! 147: "=r" (retval) : ! 148: "r" (SRMMU_FAULT_ADDR), "i" (ASI_M_MMUREGS)); ! 149: return retval; ! 150: } ! 151: ! 152: /* This is guaranteed on all SRMMU's. */ ! 153: static __inline__ void srmmu_flush_whole_tlb(void) ! 154: { ! 155: __asm__ __volatile__("sta %%g0, [%0] %1\n\t": : ! 156: "r" (0x400), /* Flush entire TLB!! */ ! 157: "i" (ASI_M_FLUSH_PROBE) : "memory"); ! 158: ! 159: } ! 160: ! 161: /* These flush types are not available on all chips... */ ! 162: static __inline__ void srmmu_flush_tlb_ctx(void) ! 163: { ! 164: __asm__ __volatile__("sta %%g0, [%0] %1\n\t": : ! 165: "r" (0x300), /* Flush TLB ctx.. */ ! 166: "i" (ASI_M_FLUSH_PROBE) : "memory"); ! 167: ! 168: } ! 169: ! 170: static __inline__ void srmmu_flush_tlb_region(unsigned long addr) ! 171: { ! 172: addr &= SRMMU_PGDIR_MASK; ! 173: __asm__ __volatile__("sta %%g0, [%0] %1\n\t": : ! 174: "r" (addr | 0x200), /* Flush TLB region.. */ ! 175: "i" (ASI_M_FLUSH_PROBE) : "memory"); ! 176: ! 177: } ! 178: ! 179: ! 180: static __inline__ void srmmu_flush_tlb_segment(unsigned long addr) ! 181: { ! 182: addr &= SRMMU_PMD_MASK; ! 183: __asm__ __volatile__("sta %%g0, [%0] %1\n\t": : ! 184: "r" (addr | 0x100), /* Flush TLB segment.. */ ! 185: "i" (ASI_M_FLUSH_PROBE) : "memory"); ! 186: ! 187: } ! 188: ! 189: static __inline__ void srmmu_flush_tlb_page(unsigned long page) ! 190: { ! 191: page &= PAGE_MASK; ! 192: __asm__ __volatile__("sta %%g0, [%0] %1\n\t": : ! 193: "r" (page), /* Flush TLB page.. */ ! 194: "i" (ASI_M_FLUSH_PROBE) : "memory"); ! 195: ! 196: } ! 197: ! 198: static __inline__ unsigned long srmmu_hwprobe(unsigned long vaddr) ! 199: { ! 200: unsigned long retval; ! 201: ! 202: vaddr &= PAGE_MASK; ! 203: __asm__ __volatile__("lda [%1] %2, %0\n\t" : ! 204: "=r" (retval) : ! 205: "r" (vaddr | 0x400), "i" (ASI_M_FLUSH_PROBE)); ! 206: ! 207: return retval; ! 208: } ! 209: ! 210: static __inline__ int ! 211: srmmu_get_pte (unsigned long addr) ! 212: { ! 213: register unsigned long entry; ! 214: ! 215: __asm__ __volatile__("\n\tlda [%1] %2,%0\n\t" : ! 216: "=r" (entry): ! 217: "r" ((addr & 0xfffff000) | 0x400), "i" (ASI_M_FLUSH_PROBE)); ! 218: return entry; ! 219: } ! 220: ! 221: #endif /* !(__ASSEMBLY__) */ ! 222: ! 223: #endif /* !(_SPARC_PGTSRMMU_H) */
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