1 files changed, 163 insertions, 0 deletions
diff --git a/arch/sparc/mm/generic_64.c b/arch/sparc/mm/generic_64.c
new file mode 100644
index 000000000000..f362c2037013
--- /dev/null
+++ b/arch/sparc/mm/generic_64.c
@@ -0,0 +1,163 @@
+/*
+ * generic.c: Generic Sparc mm routines that are not dependent upon
+ *            MMU type but are Sparc specific.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/pagemap.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/tlbflush.h>
+/* Remap IO memory, the same way as remap_pfn_range(), but use
+ * the obio memory space.
+ *
+ * They use a pgprot that sets PAGE_IO and does not check the
+ * mem_map table as this is independent of normal memory.
+ */
+static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
+                                      unsigned long address,
+                                      unsigned long size,
+                                      unsigned long offset, pgprot_t prot,
+                                      int space)
+{
+        unsigned long end;
+        /* clear hack bit that was used as a write_combine side-effect flag */
+        offset &= ~0x1UL;
+        address &= ~PMD_MASK;
+        end = address + size;
+        if (end > PMD_SIZE)
+                end = PMD_SIZE;
+        do {
+                pte_t entry;
+                unsigned long curend = address + PAGE_SIZE;
+                
+                entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
+                if (!(address & 0xffff)) {
+                        if (PAGE_SIZE < (4 * 1024 * 1024) &&
+                            !(address & 0x3fffff) &&
+                            !(offset & 0x3ffffe) &&
+                            end >= address + 0x400000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  4 * 1024 * 1024);
+                                curend = address + 0x400000;
+                                offset += 0x400000;
+                        } else if (PAGE_SIZE < (512 * 1024) &&
+                                   !(address & 0x7ffff) &&
+                                   !(offset & 0x7fffe) &&
+                                   end >= address + 0x80000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  512 * 1024 * 1024);
+                                curend = address + 0x80000;
+                                offset += 0x80000;
+                        } else if (PAGE_SIZE < (64 * 1024) &&
+                                   !(offset & 0xfffe) &&
+                                   end >= address + 0x10000) {
+                                entry = mk_pte_io(offset, prot, space,
+                                                  64 * 1024);
+                                curend = address + 0x10000;
+                                offset += 0x10000;
+                        } else
+                                offset += PAGE_SIZE;
+                } else
+                        offset += PAGE_SIZE;
+                if (pte_write(entry))
+                        entry = pte_mkdirty(entry);
+                do {
+                        BUG_ON(!pte_none(*pte));
+                        set_pte_at(mm, address, pte, entry);
+                        address += PAGE_SIZE;
+                        pte_val(entry) += PAGE_SIZE;
+                        pte++;
+                } while (address < curend);
+        } while (address < end);
+}
+static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
+        unsigned long offset, pgprot_t prot, int space)
+{
+        unsigned long end;
+        address &= ~PGDIR_MASK;
+        end = address + size;
+        if (end > PGDIR_SIZE)
+                end = PGDIR_SIZE;
+        offset -= address;
+        do {
+                pte_t * pte = pte_alloc_map(mm, pmd, address);
+                if (!pte)
+                        return -ENOMEM;
+                io_remap_pte_range(mm, pte, address, end - address, address + offset, prot, space);
+                pte_unmap(pte);
+                address = (address + PMD_SIZE) & PMD_MASK;
+                pmd++;
+        } while (address < end);
+        return 0;
+}
+static inline int io_remap_pud_range(struct mm_struct *mm, pud_t * pud, unsigned long address, unsigned long size,
+        unsigned long offset, pgprot_t prot, int space)
+{
+        unsigned long end;
+        address &= ~PUD_MASK;
+        end = address + size;
+        if (end > PUD_SIZE)
+                end = PUD_SIZE;
+        offset -= address;
+        do {
+                pmd_t *pmd = pmd_alloc(mm, pud, address);
+                if (!pud)
+                        return -ENOMEM;
+                io_remap_pmd_range(mm, pmd, address, end - address, address + offset, prot, space);
+                address = (address + PUD_SIZE) & PUD_MASK;
+                pud++;
+        } while (address < end);
+        return 0;
+}
+int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
+                unsigned long pfn, unsigned long size, pgprot_t prot)
+{
+        int error = 0;
+        pgd_t * dir;
+        unsigned long beg = from;
+        unsigned long end = from + size;
+        struct mm_struct *mm = vma->vm_mm;
+        int space = GET_IOSPACE(pfn);
+        unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
+        unsigned long phys_base;
+        phys_base = offset | (((unsigned long) space) << 32UL);
+        /* See comment in mm/memory.c remap_pfn_range */
+        vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+        vma->vm_pgoff = phys_base >> PAGE_SHIFT;
+        offset -= from;
+        dir = pgd_offset(mm, from);
+        flush_cache_range(vma, beg, end);
+        while (from < end) {
+                pud_t *pud = pud_alloc(mm, dir, from);
+                error = -ENOMEM;
+                if (!pud)
+                        break;
+                error = io_remap_pud_range(mm, pud, from, end - from, offset + from, prot, space);
+                if (error)
+                        break;
+                from = (from + PGDIR_SIZE) & PGDIR_MASK;
+                dir++;
+        }
+        flush_tlb_range(vma, beg, end);
+        return error;
+}

diff --git a/arch/sparc/mm/generic_64.c b/arch/sparc/mm/generic_64.c new file mode 100644 index 000000000000..f362c2037013 --- /dev/null +++ b/arch/sparc/mm/generic_64.c
@@ -0,0 +1,163 @@
	1	/*
	2	* generic.c: Generic Sparc mm routines that are not dependent upon
	3	* MMU type but are Sparc specific.
	4	*
	5	* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/mm.h>
	10	#include <linux/swap.h>
	11	#include <linux/pagemap.h>
	12
	13	#include <asm/pgalloc.h>
	14	#include <asm/pgtable.h>
	15	#include <asm/page.h>
	16	#include <asm/tlbflush.h>
	17
	18	/* Remap IO memory, the same way as remap_pfn_range(), but use
	19	* the obio memory space.
	20	*
	21	* They use a pgprot that sets PAGE_IO and does not check the
	22	* mem_map table as this is independent of normal memory.
	23	*/
	24	static inline void io_remap_pte_range(struct mm_struct mm, pte_t pte,
	25	unsigned long address,
	26	unsigned long size,
	27	unsigned long offset, pgprot_t prot,
	28	int space)
	29	{
	30	unsigned long end;
	31
	32	/* clear hack bit that was used as a write_combine side-effect flag */
	33	offset &= ~0x1UL;
	34	address &= ~PMD_MASK;
	35	end = address + size;
	36	if (end > PMD_SIZE)
	37	end = PMD_SIZE;
	38	do {
	39	pte_t entry;
	40	unsigned long curend = address + PAGE_SIZE;
	41
	42	entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
	43	if (!(address & 0xffff)) {
	44	if (PAGE_SIZE < (4 * 1024 * 1024) &&
	45	!(address & 0x3fffff) &&
	46	!(offset & 0x3ffffe) &&
	47	end >= address + 0x400000) {
	48	entry = mk_pte_io(offset, prot, space,
	49	4 * 1024 * 1024);
	50	curend = address + 0x400000;
	51	offset += 0x400000;
	52	} else if (PAGE_SIZE < (512 * 1024) &&
	53	!(address & 0x7ffff) &&
	54	!(offset & 0x7fffe) &&
	55	end >= address + 0x80000) {
	56	entry = mk_pte_io(offset, prot, space,
	57	512 * 1024 * 1024);
	58	curend = address + 0x80000;
	59	offset += 0x80000;
	60	} else if (PAGE_SIZE < (64 * 1024) &&
	61	!(offset & 0xfffe) &&
	62	end >= address + 0x10000) {
	63	entry = mk_pte_io(offset, prot, space,
	64	64 * 1024);
	65	curend = address + 0x10000;
	66	offset += 0x10000;
	67	} else
	68	offset += PAGE_SIZE;
	69	} else
	70	offset += PAGE_SIZE;
	71
	72	if (pte_write(entry))
	73	entry = pte_mkdirty(entry);
	74	do {
	75	BUG_ON(!pte_none(*pte));
	76	set_pte_at(mm, address, pte, entry);
	77	address += PAGE_SIZE;
	78	pte_val(entry) += PAGE_SIZE;
	79	pte++;
	80	} while (address < curend);
	81	} while (address < end);
	82	}
	83
	84	static inline int io_remap_pmd_range(struct mm_struct mm, pmd_t pmd, unsigned long address, unsigned long size,
	85	unsigned long offset, pgprot_t prot, int space)
	86	{
	87	unsigned long end;
	88
	89	address &= ~PGDIR_MASK;
	90	end = address + size;
	91	if (end > PGDIR_SIZE)
	92	end = PGDIR_SIZE;
	93	offset -= address;
	94	do {
	95	pte_t * pte = pte_alloc_map(mm, pmd, address);
	96	if (!pte)
	97	return -ENOMEM;
	98	io_remap_pte_range(mm, pte, address, end - address, address + offset, prot, space);
	99	pte_unmap(pte);
	100	address = (address + PMD_SIZE) & PMD_MASK;
	101	pmd++;
	102	} while (address < end);
	103	return 0;
	104	}
	105
	106	static inline int io_remap_pud_range(struct mm_struct mm, pud_t pud, unsigned long address, unsigned long size,
	107	unsigned long offset, pgprot_t prot, int space)
	108	{
	109	unsigned long end;
	110
	111	address &= ~PUD_MASK;
	112	end = address + size;
	113	if (end > PUD_SIZE)
	114	end = PUD_SIZE;
	115	offset -= address;
	116	do {
	117	pmd_t *pmd = pmd_alloc(mm, pud, address);
	118	if (!pud)
	119	return -ENOMEM;
	120	io_remap_pmd_range(mm, pmd, address, end - address, address + offset, prot, space);
	121	address = (address + PUD_SIZE) & PUD_MASK;
	122	pud++;
	123	} while (address < end);
	124	return 0;
	125	}
	126
	127	int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
	128	unsigned long pfn, unsigned long size, pgprot_t prot)
	129	{
	130	int error = 0;
	131	pgd_t * dir;
	132	unsigned long beg = from;
	133	unsigned long end = from + size;
	134	struct mm_struct *mm = vma->vm_mm;
	135	int space = GET_IOSPACE(pfn);
	136	unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
	137	unsigned long phys_base;
	138
	139	phys_base = offset \| (((unsigned long) space) << 32UL);
	140
	141	/* See comment in mm/memory.c remap_pfn_range */
	142	vma->vm_flags \|= VM_IO \| VM_RESERVED \| VM_PFNMAP;
	143	vma->vm_pgoff = phys_base >> PAGE_SHIFT;
	144
	145	offset -= from;
	146	dir = pgd_offset(mm, from);
	147	flush_cache_range(vma, beg, end);
	148
	149	while (from < end) {
	150	pud_t *pud = pud_alloc(mm, dir, from);
	151	error = -ENOMEM;
	152	if (!pud)
	153	break;
	154	error = io_remap_pud_range(mm, pud, from, end - from, offset + from, prot, space);
	155	if (error)
	156	break;
	157	from = (from + PGDIR_SIZE) & PGDIR_MASK;
	158	dir++;
	159	}
	160
	161	flush_tlb_range(vma, beg, end);
	162	return error;
	163	}