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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Some more new files for Linux PAE.
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID d99ebf2de9f37728f7c1906eeb6db8f9305cc6bb
# Parent be1153585cb06bb4da614c07ed7c68dd2a9e9e3e
Some more new files for Linux PAE.
Signed-off-by: Gerd Knorr <kraxel@xxxxxxx>
diff -r be1153585cb0 -r d99ebf2de9f3
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
--- /dev/null Tue Jul 12 16:19:59 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h Tue Jul
12 16:20:36 2005
@@ -0,0 +1,187 @@
+#ifndef _I386_PGTABLE_3LEVEL_H
+#define _I386_PGTABLE_3LEVEL_H
+
+#include <asm-generic/pgtable-nopud.h>
+
+/*
+ * Intel Physical Address Extension (PAE) Mode - three-level page
+ * tables on PPro+ CPUs.
+ *
+ * Copyright (C) 1999 Ingo Molnar <mingo@xxxxxxxxxx>
+ */
+
+#define pte_ERROR(e) \
+ printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, &(e),
(e).pte_high, (e).pte_low)
+#define pmd_ERROR(e) \
+ printk("%s:%d: bad pmd %p(%016Lx).\n", __FILE__, __LINE__, &(e),
pmd_val(e))
+#define pgd_ERROR(e) \
+ printk("%s:%d: bad pgd %p(%016Lx).\n", __FILE__, __LINE__, &(e),
pgd_val(e))
+
+#define pud_none(pud) 0
+#define pud_bad(pud) 0
+#define pud_present(pud) 1
+
+/*
+ * Is the pte executable?
+ */
+static inline int pte_x(pte_t pte)
+{
+ return !(pte_val(pte) & _PAGE_NX);
+}
+
+/*
+ * All present user-pages with !NX bit are user-executable:
+ */
+static inline int pte_exec(pte_t pte)
+{
+ return pte_user(pte) && pte_x(pte);
+}
+/*
+ * All present pages with !NX bit are kernel-executable:
+ */
+static inline int pte_exec_kernel(pte_t pte)
+{
+ return pte_x(pte);
+}
+
+/* Rules for using set_pte: the pte being assigned *must* be
+ * either not present or in a state where the hardware will
+ * not attempt to update the pte. In places where this is
+ * not possible, use pte_get_and_clear to obtain the old pte
+ * value and then use set_pte to update it. -ben
+ */
+#define __HAVE_ARCH_SET_PTE_ATOMIC
+
+#if 1
+/* use writable pagetables */
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+ ptep->pte_high = pte.pte_high;
+ smp_wmb();
+ ptep->pte_low = pte.pte_low;
+}
+# define set_pte_atomic(pteptr,pteval) \
+ set_64bit((unsigned long long *)(pteptr),pte_val_ma(pteval))
+#else
+/* no writable pagetables */
+# define set_pte(pteptr,pteval) \
+ xen_l1_entry_update((pteptr), (pteval))
+# define set_pte_atomic(pteptr,pteval) set_pte(pteptr,pteval)
+#endif
+
+#ifdef CONFIG_XEN_SHADOW_MODE
+# define set_pmd(pmdptr,pmdval) \
+ set_64bit((unsigned long long *)(pmdptr),pmd_val(pmdval))
+# define set_pud(pudptr,pudval) \
+ set_64bit((unsigned long long *)(pudptr),pud_val(pudval))
+#else
+# define set_pmd(pmdptr,pmdval) \
+ xen_l2_entry_update((pmdptr), (pmdval))
+# define set_pud(pudptr,pudval) \
+ xen_l3_entry_update((pudptr), (pudval))
+#endif
+
+/*
+ * Pentium-II erratum A13: in PAE mode we explicitly have to flush
+ * the TLB via cr3 if the top-level pgd is changed...
+ * We do not let the generic code free and clear pgd entries due to
+ * this erratum.
+ */
+static inline void pud_clear (pud_t * pud) { }
+
+#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+
+#define pmd_page_kernel(pmd) \
+((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
+#define pud_page(pud) \
+((struct page *) __va(pud_val(pud) & PAGE_MASK))
+
+#define pud_page_kernel(pud) \
+((unsigned long) __va(pud_val(pud) & PAGE_MASK))
+
+
+/* Find an entry in the second-level page table.. */
+#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
+ pmd_index(address))
+
+static inline pte_t ptep_get_and_clear(pte_t *ptep)
+{
+ pte_t res;
+
+ /* xchg acts as a barrier before the setting of the high bits */
+ res.pte_low = xchg(&ptep->pte_low, 0);
+ res.pte_high = ptep->pte_high;
+ ptep->pte_high = 0;
+
+ return res;
+}
+
+static inline int pte_same(pte_t a, pte_t b)
+{
+ return a.pte_low == b.pte_low && a.pte_high == b.pte_high;
+}
+
+#define pte_page(x) pfn_to_page(pte_pfn(x))
+
+static inline int pte_none(pte_t pte)
+{
+ return !pte.pte_low && !pte.pte_high;
+}
+
+#define INVALID_P2M_ENTRY (~0U)
+#define FOREIGN_FRAME(_m) ((_m) | (1UL<<((sizeof(unsigned long)*8)-1)))
+#define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT) /* FIXME */
+#define pte_pfn(_pte) \
+({ \
+ unsigned long mfn = pte_mfn(_pte); \
+ unsigned long pfn = mfn_to_pfn(mfn); \
+ if ((pfn >= max_mapnr) || (pfn_to_mfn(pfn) != mfn)) \
+ pfn = max_mapnr; /* special: force !pfn_valid() */ \
+ pfn; \
+})
+
+extern unsigned long long __supported_pte_mask;
+
+static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
+{
+ pte_t pte;
+
+ pte.pte_high = (page_nr >> (32 - PAGE_SHIFT)) | \
+ (pgprot_val(pgprot) >> 32);
+ pte.pte_high &= (__supported_pte_mask >> 32);
+ pte.pte_low = ((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & \
+ __supported_pte_mask;
+ return pte;
+}
+
+static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
+{
+ return pfn_pte_ma(pfn_to_mfn(page_nr), pgprot);
+}
+
+static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
+{
+ BUG(); panic("needs review");
+ return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) | \
+ pgprot_val(pgprot)) & __supported_pte_mask);
+}
+
+/*
+ * Bits 0, 6 and 7 are taken in the low part of the pte,
+ * put the 32 bits of offset into the high part.
+ */
+#define pte_to_pgoff(pte) ((pte).pte_high)
+#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
+#define PTE_FILE_MAX_BITS 32
+
+/* Encode and de-code a swap entry */
+#define __swp_type(x) (((x).val) & 0x1f)
+#define __swp_offset(x) ((x).val >> 5)
+#define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5})
+#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high
})
+#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
+
+#define __pmd_free_tlb(tlb, x) do { } while (0)
+
+#endif /* _I386_PGTABLE_3LEVEL_H */
diff -r be1153585cb0 -r d99ebf2de9f3
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level-defs.h
--- /dev/null Tue Jul 12 16:19:59 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level-defs.h
Tue Jul 12 16:20:36 2005
@@ -0,0 +1,25 @@
+#ifndef _I386_PGTABLE_3LEVEL_DEFS_H
+#define _I386_PGTABLE_3LEVEL_DEFS_H
+
+#define HAVE_SHARED_KERNEL_PMD 0
+
+/*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
+#define PGDIR_SHIFT 30
+#define PTRS_PER_PGD 4
+#define PTRS_PER_PGD_NO_HV 4
+
+/*
+ * PMD_SHIFT determines the size of the area a middle-level
+ * page table can map
+ */
+#define PMD_SHIFT 21
+#define PTRS_PER_PMD 512
+
+/*
+ * entries per page directory level
+ */
+#define PTRS_PER_PTE 512
+
+#endif /* _I386_PGTABLE_3LEVEL_DEFS_H */
diff -r be1153585cb0 -r d99ebf2de9f3
linux-2.6-xen-sparse/include/asm-xen/asm-i386/bug.h
--- /dev/null Tue Jul 12 16:19:59 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/bug.h Tue Jul 12
16:20:36 2005
@@ -0,0 +1,16 @@
+#ifndef _I386_BUG_H
+#define _I386_BUG_H
+
+#include <linux/config.h>
+
+#define BUG() do { \
+ printk("kernel BUG at %s:%d (%s)!\n", \
+ __FILE__, __LINE__, __FUNCTION__); \
+ dump_stack(); \
+ panic("BUG!"); \
+} while (0)
+#define HAVE_ARCH_BUG
+
+#include <asm-generic/bug.h>
+
+#endif
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