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Subject[PATCH 3/14] Generic ioremap_page_range: alpha conversion
Date
From: Richard Henderson <rth@twiddle.net>

Convert Alpha to use generic ioremap_page_range() by turning
__alpha_remap_area_pages() into an inline wrapper around
ioremap_page_range().

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---
arch/alpha/kernel/proto.h | 15 ++++++--
arch/alpha/mm/Makefile | 2 +
arch/alpha/mm/remap.c | 86 ---------------------------------------------
3 files changed, 13 insertions(+), 90 deletions(-)

diff --git a/arch/alpha/kernel/proto.h b/arch/alpha/kernel/proto.h
index 2a6e3da..21f7128 100644
--- a/arch/alpha/kernel/proto.h
+++ b/arch/alpha/kernel/proto.h
@@ -1,5 +1,7 @@
#include <linux/interrupt.h>
+#include <linux/io.h>

+#include <asm/pgtable.h>

/* Prototypes of functions used across modules here in this directory. */

@@ -181,9 +183,16 @@ extern void titan_dispatch_irqs(u64, str
extern void switch_to_system_map(void);
extern void srm_paging_stop(void);

-/* ../mm/remap.c */
-extern int __alpha_remap_area_pages(unsigned long, unsigned long,
- unsigned long, unsigned long);
+static inline int
+__alpha_remap_area_pages(unsigned long address, unsigned long phys_addr,
+ unsigned long size, unsigned long flags)
+{
+ pgprot_t prot;
+
+ prot = __pgprot(_PAGE_VALID | _PAGE_ASM | _PAGE_KRE
+ | _PAGE_KWE | flags);
+ return ioremap_page_range(address, address + size, phys_addr, prot);
+}

/* irq.c */

diff --git a/arch/alpha/mm/Makefile b/arch/alpha/mm/Makefile
index 6edd9a0..09399c5 100644
--- a/arch/alpha/mm/Makefile
+++ b/arch/alpha/mm/Makefile
@@ -4,6 +4,6 @@ #

EXTRA_CFLAGS := -Werror

-obj-y := init.o fault.o extable.o remap.o
+obj-y := init.o fault.o extable.o

obj-$(CONFIG_DISCONTIGMEM) += numa.o
diff --git a/arch/alpha/mm/remap.c b/arch/alpha/mm/remap.c
deleted file mode 100644
index a78356c..0000000
--- a/arch/alpha/mm/remap.c
+++ /dev/null
@@ -1,86 +0,0 @@
-#include <linux/vmalloc.h>
-#include <asm/pgalloc.h>
-#include <asm/cacheflush.h>
-
-static inline void
-remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
- unsigned long phys_addr, unsigned long flags)
-{
- unsigned long end;
- unsigned long pfn;
-
- address &= ~PMD_MASK;
- end = address + size;
- if (end > PMD_SIZE)
- end = PMD_SIZE;
- if (address >= end)
- BUG();
- pfn = phys_addr >> PAGE_SHIFT;
- do {
- if (!pte_none(*pte)) {
- printk("remap_area_pte: page already exists\n");
- BUG();
- }
- set_pte(pte, pfn_pte(pfn,
- __pgprot(_PAGE_VALID | _PAGE_ASM |
- _PAGE_KRE | _PAGE_KWE | flags)));
- address += PAGE_SIZE;
- pfn++;
- pte++;
- } while (address && (address < end));
-}
-
-static inline int
-remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
- unsigned long phys_addr, unsigned long flags)
-{
- unsigned long end;
-
- address &= ~PGDIR_MASK;
- end = address + size;
- if (end > PGDIR_SIZE)
- end = PGDIR_SIZE;
- phys_addr -= address;
- if (address >= end)
- BUG();
- do {
- pte_t * pte = pte_alloc_kernel(pmd, address);
- if (!pte)
- return -ENOMEM;
- remap_area_pte(pte, address, end - address,
- address + phys_addr, flags);
- address = (address + PMD_SIZE) & PMD_MASK;
- pmd++;
- } while (address && (address < end));
- return 0;
-}
-
-int
-__alpha_remap_area_pages(unsigned long address, unsigned long phys_addr,
- unsigned long size, unsigned long flags)
-{
- pgd_t * dir;
- int error = 0;
- unsigned long end = address + size;
-
- phys_addr -= address;
- dir = pgd_offset(&init_mm, address);
- flush_cache_all();
- if (address >= end)
- BUG();
- do {
- pmd_t *pmd;
- pmd = pmd_alloc(&init_mm, dir, address);
- error = -ENOMEM;
- if (!pmd)
- break;
- if (remap_area_pmd(pmd, address, end - address,
- phys_addr + address, flags))
- break;
- error = 0;
- address = (address + PGDIR_SIZE) & PGDIR_MASK;
- dir++;
- } while (address && (address < end));
- return error;
-}
-
--
1.4.0
-
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