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pa11.c
资源名称：SBC-2410X_kernel.tar.gz　[点击查看]
上传用户：lgb322
上传日期：2013-02-24
资源大小：30529k
文件大小：5k
源码类别：

嵌入式Linux

开发平台：

Unix_Linux

pa11.c：源码内容
  1. /* $Id: pa11.c,v 1.1 1999/03/17 01:05:41 pjlahaie Exp $
  2.  *
  3.  * pa11.c: PA 1.1 specific mmu/cache code.
  4.  *
  5.  */
  6. #include <linux/init.h>
  7. #include <linux/kernel.h>
  8. #include <linux/sched.h>
  9. #include <linux/mm.h>
  11. #include <asm/page.h>
  12. #include <asm/pgtable.h>
  13. #include <asm/system.h>
  14. #include <asm/sgialib.h>
  15. #include <asm/mmu_context.h>
  17. extern unsigned long mips_tlb_entries;
  19. /* page functions */
  20. void pa11_clear_page(unsigned long page)
  21. {
  22. }
  24. static void pa11_copy_page(unsigned long to, unsigned long from)
  25. {
  26. }
  28. /* Cache operations. */
  29. static inline void pa11_flush_cache_all(void) { }
  30. static void pa11_flush_cache_mm(struct mm_struct *mm) { }
  31. static void pa11_flush_cache_range(struct mm_struct *mm,
  32.     unsigned long start,
  33.     unsigned long end)
  34. {
  35. }
  37. static void pa11_flush_cache_page(struct vm_area_struct *vma,
  38.    unsigned long page)
  39. {
  40. }
  42. static void pa11_flush_page_to_ram(unsigned long page)
  43. {
  44. }
  46. static void pa11_flush_cache_sigtramp(unsigned long page)
  47. {
  48. }
  50. /* TLB operations. */
  51. static inline void pa11_flush_tlb_all(void)
  52. {
  53. unsigned long flags;
  54. int entry;
  56. save_and_cli(flags);
  57. /* Here we will need to flush all the TLBs */
  58. restore_flags(flags);
  59. }
  61. static void pa11_flush_tlb_mm(struct mm_struct *mm)
  62. {
  63. /* This is what the MIPS does..  Is it the right thing for PA-RISC? */
  64. if(mm == current->mm)
  65. pa11_flush_tlb_all();
  66. }
  68. static void pa11_flush_tlb_range(struct mm_struct *mm, unsigned long start,
  69.   unsigned long end)
  70. {
  71. if(mm == current->mm)
  72. pa11_flush_tlb_all();
  73. }
  75. static void pa11_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
  76. {
  77. if(vma->vm_mm == current->mm)
  78. pa11_flush_tlb_all();
  79. }
  81. static void pa11_load_pgd(unsigned long pg_dir)
  82. {
  83. unsigned long flags;
  84.     /* We need to do the right thing here */
  85. }
  87. /*
  88.  * Initialize new page directory with pointers to invalid ptes
  89.  */
  90. static void pa11_pgd_init(unsigned long page)
  91. {
  92. unsigned long dummy1, dummy2;
  94. }
  96. static void pa11_update_mmu_cache(struct vm_area_struct * vma,
  97.    unsigned long address, pte_t pte)
  98. {
  99. pa11_flush_tlb_page(vma, address);
  100. }
  102. static void pa11_show_regs(struct pt_regs * regs)
  103. {
  104. /*
  105.  * Saved main processor registers
  106.  */
  107. printk("$0 : %08x %08lx %08lx %08lx %08lx %08lx %08lx %08lxn",
  108.        0, (unsigned long) regs->regs[1], (unsigned long) regs->regs[2],
  109.        (unsigned long) regs->regs[3], (unsigned long) regs->regs[4],
  110.        (unsigned long) regs->regs[5], (unsigned long) regs->regs[6],
  111.        (unsigned long) regs->regs[7]);
  112. printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lxn",
  113.        (unsigned long) regs->regs[8], (unsigned long) regs->regs[9],
  114.        (unsigned long) regs->regs[10], (unsigned long) regs->regs[11],
  115.                (unsigned long) regs->regs[12], (unsigned long) regs->regs[13],
  116.        (unsigned long) regs->regs[14], (unsigned long) regs->regs[15]);
  117. printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lxn",
  118.        (unsigned long) regs->regs[16], (unsigned long) regs->regs[17],
  119.        (unsigned long) regs->regs[18], (unsigned long) regs->regs[19],
  120.                (unsigned long) regs->regs[20], (unsigned long) regs->regs[21],
  121.        (unsigned long) regs->regs[22], (unsigned long) regs->regs[23]);
  122. printk("$24: %08lx %08lx                   %08lx %08lx %08lx %08lxn",
  123.        (unsigned long) regs->regs[24], (unsigned long) regs->regs[25],
  124.        (unsigned long) regs->regs[28], (unsigned long) regs->regs[29],
  125.                (unsigned long) regs->regs[30], (unsigned long) regs->regs[31]);
  127. /*
  128.  * Saved cp0 registers
  129.  */
  130. printk("epc  : %08lx    %snStatus: %08xnCause : %08xn",
  131.        (unsigned long) regs->cp0_epc, print_tainted(),
  132.        (unsigned int) regs->cp0_status,
  133.        (unsigned int) regs->cp0_cause);
  134. }
  136. static int pa11_user_mode(struct pt_regs *regs)
  137. {
  138.        /* Return user mode stuff?? */
  139. }
  141. __initfunc(void ld_mmu_pa11(void))
  142. {
  144.     /* Taken directly from the MIPS arch..  Lots of bad things here */
  145. clear_page = pa11_clear_page;
  146. copy_page = pa11_copy_page;
  148. flush_cache_all = pa11_flush_cache_all;
  149. flush_cache_mm = pa11_flush_cache_mm;
  150. flush_cache_range = pa11_flush_cache_range;
  151. flush_cache_page = pa11_flush_cache_page;
  152. flush_cache_sigtramp = pa11_flush_cache_sigtramp;
  153. flush_page_to_ram = pa11_flush_page_to_ram;
  155. flush_tlb_all = pa11_flush_tlb_all;
  156. flush_tlb_mm = pa11_flush_tlb_mm;
  157. flush_tlb_range = pa11_flush_tlb_range;
  158. flush_tlb_page = pa11_flush_tlb_page;
  159. pa11_asid_setup();
  161. load_pgd = pa11_load_pgd;
  162. pgd_init = pa11_pgd_init;
  163. update_mmu_cache = pa11_update_mmu_cache;
  165. show_regs = pa11_show_regs;
  166.     
  167.         add_wired_entry = pa11_add_wired_entry;
  169. user_mode = pa11_user_mode;
  170. flush_tlb_all();
  171. }