VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / arch / ia64 / ia32 / ia32priv.h

diff --git a/arch/ia64/ia32/ia32priv.h b/arch/ia64/ia32/ia32priv.h
index e6f95af..ba875e0 100644 (file)
--- a/arch/ia64/ia32/ia32priv.h
+++ b/arch/ia64/ia32/ia32priv.h
@@ -1,5 +1,5 @@
-#ifndef _ASM_IA64_IA32_H
-#define _ASM_IA64_IA32_H
+#ifndef _ASM_IA64_IA32_PRIV_H
+#define _ASM_IA64_IA32_PRIV_H
 
 #include <linux/config.h>
 
@@ -9,6 +9,7 @@
 
 #include <linux/binfmts.h>
 #include <linux/compat.h>
+#include <linux/rbtree.h>
 
 #include <asm/processor.h>
 
@@ -16,12 +17,39 @@
  * 32 bit structures for IA32 support.
  */
 
-#define IA32_PAGE_SHIFT                12      /* 4KB pages */
 #define IA32_PAGE_SIZE         (1UL << IA32_PAGE_SHIFT)
 #define IA32_PAGE_MASK         (~(IA32_PAGE_SIZE - 1))
 #define IA32_PAGE_ALIGN(addr)  (((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
 #define IA32_CLOCKS_PER_SEC    100     /* Cast in stone for IA32 Linux */
 
+/*
+ * partially mapped pages provide precise accounting of which 4k sub pages
+ * are mapped and which ones are not, thereby improving IA-32 compatibility.
+ */
+struct partial_page {
+       struct partial_page     *next; /* linked list, sorted by address */
+       struct rb_node          pp_rb;
+       /* 64K is the largest "normal" page supported by ia64 ABI. So 4K*32
+        * should suffice.*/
+       unsigned int            bitmap;
+       unsigned int            base;
+};
+
+struct partial_page_list {
+       struct partial_page     *pp_head; /* list head, points to the lowest
+                                          * addressed partial page */
+       struct rb_root          ppl_rb;
+       struct partial_page     *pp_hint; /* pp_hint->next is the last
+                                          * accessed partial page */
+       atomic_t                pp_count; /* reference count */
+};
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+struct partial_page_list* ia32_init_pp_list (void);
+#else
+# define ia32_init_pp_list()   0
+#endif
+
 /* sigcontext.h */
 /*
  * As documented in the iBCS2 standard..
@@ -528,4 +556,4 @@ extern int save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_st
 
 #endif /* !CONFIG_IA32_SUPPORT */
 
-#endif /* _ASM_IA64_IA32_H */
+#endif /* _ASM_IA64_IA32_PRIV_H */