1/* $Id: pgtable.h,v 1.1.1.1 2008/10/15 03:27:26 james26_jang Exp $ */ 2#ifndef _SPARC_PGTABLE_H 3#define _SPARC_PGTABLE_H 4 5/* asm-sparc/pgtable.h: Defines and functions used to work 6 * with Sparc page tables. 7 * 8 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 9 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 10 */ 11 12#include <linux/config.h> 13#include <linux/spinlock.h> 14#include <asm/asi.h> 15#ifdef CONFIG_SUN4 16#include <asm/pgtsun4.h> 17#else 18#include <asm/pgtsun4c.h> 19#endif 20#include <asm/pgtsrmmu.h> 21#include <asm/vac-ops.h> 22#include <asm/oplib.h> 23#include <asm/sbus.h> 24#include <asm/btfixup.h> 25#include <asm/system.h> 26 27#ifndef __ASSEMBLY__ 28 29extern void load_mmu(void); 30extern unsigned long calc_highpages(void); 31 32BTFIXUPDEF_CALL(void, quick_kernel_fault, unsigned long) 33 34#define quick_kernel_fault(addr) BTFIXUP_CALL(quick_kernel_fault)(addr) 35 36/* Routines for data transfer buffers. */ 37BTFIXUPDEF_CALL(char *, mmu_lockarea, char *, unsigned long) 38BTFIXUPDEF_CALL(void, mmu_unlockarea, char *, unsigned long) 39 40#define mmu_lockarea(vaddr,len) BTFIXUP_CALL(mmu_lockarea)(vaddr,len) 41#define mmu_unlockarea(vaddr,len) BTFIXUP_CALL(mmu_unlockarea)(vaddr,len) 42 43/* These are implementations for sbus_map_sg/sbus_unmap_sg... collapse later */ 44BTFIXUPDEF_CALL(__u32, mmu_get_scsi_one, char *, unsigned long, struct sbus_bus *sbus) 45BTFIXUPDEF_CALL(void, mmu_get_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus) 46BTFIXUPDEF_CALL(void, mmu_release_scsi_one, __u32, unsigned long, struct sbus_bus *sbus) 47BTFIXUPDEF_CALL(void, mmu_release_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus) 48 49#define mmu_get_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_get_scsi_one)(vaddr,len,sbus) 50#define mmu_get_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_get_scsi_sgl)(sg,sz,sbus) 51#define mmu_release_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_release_scsi_one)(vaddr,len,sbus) 52#define mmu_release_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_release_scsi_sgl)(sg,sz,sbus) 53 54/* 55 * mmu_map/unmap are provided by iommu/iounit; Invalid to call on IIep. 56 */ 57BTFIXUPDEF_CALL(void, mmu_map_dma_area, unsigned long va, __u32 addr, int len) 58BTFIXUPDEF_CALL(unsigned long /*phys*/, mmu_translate_dvma, unsigned long busa) 59BTFIXUPDEF_CALL(void, mmu_unmap_dma_area, unsigned long busa, int len) 60 61#define mmu_map_dma_area(va, ba,len) BTFIXUP_CALL(mmu_map_dma_area)(va,ba,len) 62#define mmu_unmap_dma_area(ba,len) BTFIXUP_CALL(mmu_unmap_dma_area)(ba,len) 63#define mmu_translate_dvma(ba) BTFIXUP_CALL(mmu_translate_dvma)(ba) 64 65BTFIXUPDEF_SIMM13(pmd_shift) 66BTFIXUPDEF_SETHI(pmd_size) 67BTFIXUPDEF_SETHI(pmd_mask) 68 69extern unsigned int pmd_align(unsigned int addr) __attribute__((const)); 70extern __inline__ unsigned int pmd_align(unsigned int addr) 71{ 72 return ((addr + ~BTFIXUP_SETHI(pmd_mask)) & BTFIXUP_SETHI(pmd_mask)); 73} 74 75BTFIXUPDEF_SIMM13(pgdir_shift) 76BTFIXUPDEF_SETHI(pgdir_size) 77BTFIXUPDEF_SETHI(pgdir_mask) 78 79extern unsigned int pgdir_align(unsigned int addr) __attribute__((const)); 80extern __inline__ unsigned int pgdir_align(unsigned int addr) 81{ 82 return ((addr + ~BTFIXUP_SETHI(pgdir_mask)) & BTFIXUP_SETHI(pgdir_mask)); 83} 84 85BTFIXUPDEF_SIMM13(ptrs_per_pte) 86BTFIXUPDEF_SIMM13(ptrs_per_pmd) 87BTFIXUPDEF_SIMM13(ptrs_per_pgd) 88BTFIXUPDEF_SIMM13(user_ptrs_per_pgd) 89 90#define VMALLOC_VMADDR(x) ((unsigned long)(x)) 91 92#define pte_ERROR(e) __builtin_trap() 93#define pmd_ERROR(e) __builtin_trap() 94#define pgd_ERROR(e) __builtin_trap() 95 96BTFIXUPDEF_INT(page_none) 97BTFIXUPDEF_INT(page_shared) 98BTFIXUPDEF_INT(page_copy) 99BTFIXUPDEF_INT(page_readonly) 100BTFIXUPDEF_INT(page_kernel) 101 102#define PMD_SHIFT BTFIXUP_SIMM13(pmd_shift) 103#define PMD_SIZE BTFIXUP_SETHI(pmd_size) 104#define PMD_MASK BTFIXUP_SETHI(pmd_mask) 105#define PMD_ALIGN(addr) pmd_align(addr) 106#define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift) 107#define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size) 108#define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask) 109#define PGDIR_ALIGN pgdir_align(addr) 110#define PTRS_PER_PTE BTFIXUP_SIMM13(ptrs_per_pte) 111#define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd) 112#define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd) 113#define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd) 114#define FIRST_USER_PGD_NR 0 115 116#define PAGE_NONE __pgprot(BTFIXUP_INT(page_none)) 117#define PAGE_SHARED __pgprot(BTFIXUP_INT(page_shared)) 118#define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy)) 119#define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly)) 120 121extern unsigned long page_kernel; 122 123#ifdef MODULE 124#define PAGE_KERNEL page_kernel 125#else 126#define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) 127#endif 128 129/* Top-level page directory */ 130extern pgd_t swapper_pg_dir[1024]; 131 132/* Page table for 0-4MB for everybody, on the Sparc this 133 * holds the same as on the i386. 134 */ 135extern pte_t pg0[1024]; 136extern pte_t pg1[1024]; 137extern pte_t pg2[1024]; 138extern pte_t pg3[1024]; 139 140extern unsigned long ptr_in_current_pgd; 141 142/* Here is a trick, since mmap.c need the initializer elements for 143 * protection_map[] to be constant at compile time, I set the following 144 * to all zeros. I set it to the real values after I link in the 145 * appropriate MMU page table routines at boot time. 146 */ 147#define __P000 __pgprot(0) 148#define __P001 __pgprot(0) 149#define __P010 __pgprot(0) 150#define __P011 __pgprot(0) 151#define __P100 __pgprot(0) 152#define __P101 __pgprot(0) 153#define __P110 __pgprot(0) 154#define __P111 __pgprot(0) 155 156#define __S000 __pgprot(0) 157#define __S001 __pgprot(0) 158#define __S010 __pgprot(0) 159#define __S011 __pgprot(0) 160#define __S100 __pgprot(0) 161#define __S101 __pgprot(0) 162#define __S110 __pgprot(0) 163#define __S111 __pgprot(0) 164 165extern int num_contexts; 166 167/* First physical page can be anywhere, the following is needed so that 168 * va-->pa and vice versa conversions work properly without performance 169 * hit for all __pa()/__va() operations. 170 */ 171extern unsigned long phys_base; 172 173/* 174 * BAD_PAGETABLE is used when we need a bogus page-table, while 175 * BAD_PAGE is used for a bogus page. 176 * 177 * ZERO_PAGE is a global shared page that is always zero: used 178 * for zero-mapped memory areas etc.. 179 */ 180extern pte_t * __bad_pagetable(void); 181extern pte_t __bad_page(void); 182extern unsigned long empty_zero_page; 183 184#define BAD_PAGETABLE __bad_pagetable() 185#define BAD_PAGE __bad_page() 186#define ZERO_PAGE(vaddr) (mem_map + (((unsigned long)&empty_zero_page - PAGE_OFFSET + phys_base) >> PAGE_SHIFT)) 187 188/* number of bits that fit into a memory pointer */ 189#define BITS_PER_PTR (8*sizeof(unsigned long)) 190 191/* to align the pointer to a pointer address */ 192#define PTR_MASK (~(sizeof(void*)-1)) 193 194#define SIZEOF_PTR_LOG2 2 195 196BTFIXUPDEF_CALL_CONST(unsigned long, pmd_page, pmd_t) 197BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page, pgd_t) 198 199#define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) 200#define pgd_page(pgd) BTFIXUP_CALL(pgd_page)(pgd) 201 202BTFIXUPDEF_SETHI(none_mask) 203BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) 204BTFIXUPDEF_CALL(void, pte_clear, pte_t *) 205 206extern __inline__ int pte_none(pte_t pte) 207{ 208 return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask)); 209} 210 211#define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) 212#define pte_clear(pte) BTFIXUP_CALL(pte_clear)(pte) 213 214BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) 215BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) 216BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) 217 218extern __inline__ int pmd_none(pmd_t pmd) 219{ 220 return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask)); 221} 222 223#define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) 224#define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) 225#define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) 226 227BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) 228BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) 229BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) 230BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) 231 232#define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) 233#define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) 234#define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) 235#define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) 236 237/* 238 * The following only work if pte_present() is true. 239 * Undefined behaviour if not.. 240 */ 241BTFIXUPDEF_HALF(pte_writei) 242BTFIXUPDEF_HALF(pte_dirtyi) 243BTFIXUPDEF_HALF(pte_youngi) 244 245extern int pte_write(pte_t pte) __attribute__((const)); 246extern __inline__ int pte_write(pte_t pte) 247{ 248 return pte_val(pte) & BTFIXUP_HALF(pte_writei); 249} 250 251extern int pte_dirty(pte_t pte) __attribute__((const)); 252extern __inline__ int pte_dirty(pte_t pte) 253{ 254 return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi); 255} 256 257extern int pte_young(pte_t pte) __attribute__((const)); 258extern __inline__ int pte_young(pte_t pte) 259{ 260 return pte_val(pte) & BTFIXUP_HALF(pte_youngi); 261} 262 263BTFIXUPDEF_HALF(pte_wrprotecti) 264BTFIXUPDEF_HALF(pte_mkcleani) 265BTFIXUPDEF_HALF(pte_mkoldi) 266 267extern pte_t pte_wrprotect(pte_t pte) __attribute__((const)); 268extern __inline__ pte_t pte_wrprotect(pte_t pte) 269{ 270 return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti)); 271} 272 273extern pte_t pte_mkclean(pte_t pte) __attribute__((const)); 274extern __inline__ pte_t pte_mkclean(pte_t pte) 275{ 276 return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani)); 277} 278 279extern pte_t pte_mkold(pte_t pte) __attribute__((const)); 280extern __inline__ pte_t pte_mkold(pte_t pte) 281{ 282 return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi)); 283} 284 285BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t) 286BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t) 287BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t) 288 289#define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte) 290#define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte) 291#define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte) 292 293#define page_pte_prot(page, prot) mk_pte(page, prot) 294#define page_pte(page) page_pte_prot(page, __pgprot(0)) 295 296BTFIXUPDEF_CALL(struct page *, pte_page, pte_t) 297#define pte_page(pte) BTFIXUP_CALL(pte_page)(pte) 298 299/* 300 * Conversion functions: convert a page and protection to a page entry, 301 * and a page entry and page directory to the page they refer to. 302 */ 303BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t) 304 305BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t) 306BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int) 307 308#define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot) 309#define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot) 310#define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space) 311 312BTFIXUPDEF_CALL(void, pgd_set, pgd_t *, pmd_t *) 313BTFIXUPDEF_CALL(void, pmd_set, pmd_t *, pte_t *) 314 315#define pgd_set(pgdp,pmdp) BTFIXUP_CALL(pgd_set)(pgdp,pmdp) 316#define pmd_set(pmdp,ptep) BTFIXUP_CALL(pmd_set)(pmdp,ptep) 317 318BTFIXUPDEF_INT(pte_modify_mask) 319 320extern pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute__((const)); 321extern __inline__ pte_t pte_modify(pte_t pte, pgprot_t newprot) 322{ 323 return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) | 324 pgprot_val(newprot)); 325} 326 327#define pgd_index(address) ((address) >> PGDIR_SHIFT) 328 329/* to find an entry in a page-table-directory */ 330#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 331 332/* to find an entry in a kernel page-table-directory */ 333#define pgd_offset_k(address) pgd_offset(&init_mm, address) 334 335BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long) 336BTFIXUPDEF_CALL(pte_t *, pte_offset, pmd_t *, unsigned long) 337 338/* Find an entry in the second-level page table.. */ 339#define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr) 340 341/* Find an entry in the third-level page table.. */ 342#define pte_offset(dir,addr) BTFIXUP_CALL(pte_offset)(dir,addr) 343 344/* The permissions for pgprot_val to make a page mapped on the obio space */ 345extern unsigned int pg_iobits; 346 347#define flush_icache_page(vma, pg) do { } while(0) 348#define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 349 350/* Certain architectures need to do special things when pte's 351 * within a page table are directly modified. Thus, the following 352 * hook is made available. 353 */ 354 355BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t) 356 357#define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval) 358 359struct seq_file; 360BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *) 361 362#define mmu_info(p) BTFIXUP_CALL(mmu_info)(p) 363 364/* Fault handler stuff... */ 365#define FAULT_CODE_PROT 0x1 366#define FAULT_CODE_WRITE 0x2 367#define FAULT_CODE_USER 0x4 368 369BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t) 370 371#define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte) 372 373extern int invalid_segment; 374 375/* Encode and de-code a swap entry */ 376#define SWP_TYPE(x) (((x).val >> 2) & 0x7f) 377#define SWP_OFFSET(x) (((x).val >> 9) & 0x3ffff) 378#define SWP_ENTRY(type,offset) ((swp_entry_t) { (((type) & 0x7f) << 2) | (((offset) & 0x3ffff) << 9) }) 379#define pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 380#define swp_entry_to_pte(x) ((pte_t) { (x).val }) 381 382struct ctx_list { 383 struct ctx_list *next; 384 struct ctx_list *prev; 385 unsigned int ctx_number; 386 struct mm_struct *ctx_mm; 387}; 388 389extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */ 390extern struct ctx_list ctx_free; /* Head of free list */ 391extern struct ctx_list ctx_used; /* Head of used contexts list */ 392 393#define NO_CONTEXT -1 394 395extern __inline__ void remove_from_ctx_list(struct ctx_list *entry) 396{ 397 entry->next->prev = entry->prev; 398 entry->prev->next = entry->next; 399} 400 401extern __inline__ void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry) 402{ 403 entry->next = head; 404 (entry->prev = head->prev)->next = entry; 405 head->prev = entry; 406} 407#define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry) 408#define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry) 409 410extern __inline__ unsigned long 411__get_phys (unsigned long addr) 412{ 413 switch (sparc_cpu_model){ 414 case sun4: 415 case sun4c: 416 return sun4c_get_pte (addr) << PAGE_SHIFT; 417 case sun4m: 418 case sun4d: 419 return ((srmmu_get_pte (addr) & 0xffffff00) << 4); 420 default: 421 return 0; 422 } 423} 424 425extern __inline__ int 426__get_iospace (unsigned long addr) 427{ 428 switch (sparc_cpu_model){ 429 case sun4: 430 case sun4c: 431 return -1; /* Don't check iospace on sun4c */ 432 case sun4m: 433 case sun4d: 434 return (srmmu_get_pte (addr) >> 28); 435 default: 436 return -1; 437 } 438} 439 440extern unsigned long *sparc_valid_addr_bitmap; 441 442/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ 443#define kern_addr_valid(addr) \ 444 (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) 445 446extern int io_remap_page_range(unsigned long from, unsigned long to, 447 unsigned long size, pgprot_t prot, int space); 448 449#include <asm-generic/pgtable.h> 450 451#endif /* !(__ASSEMBLY__) */ 452 453/* We provide our own get_unmapped_area to cope with VA holes for userland */ 454#define HAVE_ARCH_UNMAPPED_AREA 455 456/* 457 * No page table caches to initialise 458 */ 459#define pgtable_cache_init() do { } while (0) 460 461#endif /* !(_SPARC_PGTABLE_H) */ 462