The patch titled
Generic ioremap_page_range: implementation
has been removed from the -mm tree. Its filename is
generic-ioremap_page_range-implementation.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: Generic ioremap_page_range: implementation
From: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
This patch adds a generic implementation of ioremap_page_range() in
lib/ioremap.c based on the i386 implementation. It differs from the
i386 version in the following ways:
* The PTE flags are passed as a pgprot_t argument and must be
determined up front by the arch-specific code. No additional
PTE flags are added.
* Uses set_pte_at() instead of set_pte()
[bunk@xxxxxxxxx: warning fix]
]dhowells@xxxxxxxxxx: nommu build fix]
Signed-off-by: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Mikael Starvik <starvik@xxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: <linux-m32r@xxxxxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/io.h | 4 +
lib/Makefile | 1
lib/ioremap.c | 94 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 99 insertions(+)
diff -puN include/linux/io.h~generic-ioremap_page_range-implementation include/linux/io.h
--- a/include/linux/io.h~generic-ioremap_page_range-implementation
+++ a/include/linux/io.h
@@ -19,8 +19,12 @@
#define _LINUX_IO_H
#include <asm/io.h>
+#include <asm/page.h>
void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
+int ioremap_page_range(unsigned long addr, unsigned long end,
+ unsigned long phys_addr, pgprot_t prot);
+
#endif /* _LINUX_IO_H */
diff -puN lib/Makefile~generic-ioremap_page_range-implementation lib/Makefile
--- a/lib/Makefile~generic-ioremap_page_range-implementation
+++ a/lib/Makefile
@@ -7,6 +7,7 @@ lib-y := errno.o ctype.o string.o vsprin
idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \
sha1.o
+lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o kref.o kobject_uevent.o klist.o
diff -puN /dev/null lib/ioremap.c
--- /dev/null
+++ a/lib/ioremap.c
@@ -0,0 +1,94 @@
+/*
+ * Re-map IO memory to kernel address space so that we can access it.
+ * This is needed for high PCI addresses that aren't mapped in the
+ * 640k-1MB IO memory area on PC's
+ *
+ * (C) Copyright 1995 1996 Linus Torvalds
+ */
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+
+#include <asm/cacheflush.h>
+#include <asm/pgtable.h>
+
+static int ioremap_pte_range(pmd_t *pmd, unsigned long addr,
+ unsigned long end, unsigned long phys_addr, pgprot_t prot)
+{
+ pte_t *pte;
+ unsigned long pfn;
+
+ pfn = phys_addr >> PAGE_SHIFT;
+ pte = pte_alloc_kernel(pmd, addr);
+ if (!pte)
+ return -ENOMEM;
+ do {
+ BUG_ON(!pte_none(*pte));
+ set_pte_at(&init_mm, addr, pte, pfn_pte(pfn, prot));
+ pfn++;
+ } while (pte++, addr += PAGE_SIZE, addr != end);
+ return 0;
+}
+
+static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr,
+ unsigned long end, unsigned long phys_addr, pgprot_t prot)
+{
+ pmd_t *pmd;
+ unsigned long next;
+
+ phys_addr -= addr;
+ pmd = pmd_alloc(&init_mm, pud, addr);
+ if (!pmd)
+ return -ENOMEM;
+ do {
+ next = pmd_addr_end(addr, end);
+ if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, prot))
+ return -ENOMEM;
+ } while (pmd++, addr = next, addr != end);
+ return 0;
+}
+
+static inline int ioremap_pud_range(pgd_t *pgd, unsigned long addr,
+ unsigned long end, unsigned long phys_addr, pgprot_t prot)
+{
+ pud_t *pud;
+ unsigned long next;
+
+ phys_addr -= addr;
+ pud = pud_alloc(&init_mm, pgd, addr);
+ if (!pud)
+ return -ENOMEM;
+ do {
+ next = pud_addr_end(addr, end);
+ if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, prot))
+ return -ENOMEM;
+ } while (pud++, addr = next, addr != end);
+ return 0;
+}
+
+int ioremap_page_range(unsigned long addr,
+ unsigned long end, unsigned long phys_addr, pgprot_t prot)
+{
+ pgd_t *pgd;
+ unsigned long start;
+ unsigned long next;
+ int err;
+
+ BUG_ON(addr >= end);
+
+ flush_cache_all();
+
+ start = addr;
+ phys_addr -= addr;
+ pgd = pgd_offset_k(addr);
+ do {
+ next = pgd_addr_end(addr, end);
+ err = ioremap_pud_range(pgd, addr, next, phys_addr+addr, prot);
+ if (err)
+ break;
+ } while (pgd++, addr = next, addr != end);
+
+ flush_tlb_all();
+
+ return err;
+}
_
Patches currently in -mm which might be from hskinnemoen@xxxxxxxxx are
origin.patch
generic-ioremap_page_range-mips-conversion.patch
generic-ioremap_page_range-parisc-conversion.patch
generic-ioremap_page_range-s390-conversion.patch
generic-ioremap_page_range-sh-conversion.patch
generic-ioremap_page_range-sh64-conversion.patch
avr32-implement-kernel_execve.patch
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