[PATCH 01/15] powerpc: move asm/hignmem.h

[sfr@canb.auug.org.au]

From: Stephen Rothwell <sfr@canb.auug.org.au>

Files in arch/powerpc now depend on asm/highmem.h, so move
it to include/asm-powerpc/

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

---

 include/asm-powerpc/highmem.h |  136 +++++++++++++++++++++++++++++++++++++++++
 include/asm-ppc/highmem.h     |  137 -----------------------------------------
 2 files changed, 136 insertions(+), 137 deletions(-)
 create mode 100644 include/asm-powerpc/highmem.h
 delete mode 100644 include/asm-ppc/highmem.h

50bea8557eb3c7ac43a21d7e5990e2f61cf4caed
diff --git a/include/asm-powerpc/highmem.h b/include/asm-powerpc/highmem.h
new file mode 100644
index 0000000..c2357ba
--- /dev/null
+++ b/include/asm-powerpc/highmem.h
@@ -0,0 +1,136 @@
+#ifndef _ASM_POWERPC_HIGHMEM_H
+#define _ASM_POWERPC_HIGHMEM_H
+/*
+ * highmem.h: virtual kernel memory mappings for high memory
+ *
+ * PowerPC version, stolen from the i386 version.
+ *
+ * Used in CONFIG_HIGHMEM systems for memory pages which
+ * are not addressable by direct kernel virtual addresses.
+ *
+ * Copyright (C) 1999 Gerhard Wichert, Siemens AG
+ *		      Gerhard.Wichert@pdb.siemens.de
+ *
+ *
+ * Redesigned the x86 32-bit VM architecture to deal with
+ * up to 16 Terrabyte physical memory. With current x86 CPUs
+ * we now support up to 64 Gigabytes physical RAM.
+ *
+ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+ */
+
+#ifdef __KERNEL__
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/kmap_types.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+
+/* undef for production */
+#define HIGHMEM_DEBUG 1
+
+extern pte_t *kmap_pte;
+extern pgprot_t kmap_prot;
+extern pte_t *pkmap_page_table;
+
+/*
+ * Right now we initialize only a single pte table. It can be extended
+ * easily, subsequent pte tables have to be allocated in one physical
+ * chunk of RAM.
+ */
+#define PKMAP_BASE	CONFIG_HIGHMEM_START
+#define LAST_PKMAP	(1 << PTE_SHIFT)
+#define LAST_PKMAP_MASK (LAST_PKMAP-1)
+#define PKMAP_NR(virt)  ((virt-PKMAP_BASE) >> PAGE_SHIFT)
+#define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
+
+#define KMAP_FIX_BEGIN	(PKMAP_BASE + 0x00400000UL)
+
+extern void *kmap_high(struct page *page);
+extern void kunmap_high(struct page *page);
+
+static inline void *kmap(struct page *page)
+{
+	might_sleep();
+	if (!PageHighMem(page))
+		return page_address(page);
+	return kmap_high(page);
+}
+
+static inline void kunmap(struct page *page)
+{
+	BUG_ON(in_interrupt());
+	if (!PageHighMem(page))
+		return;
+	kunmap_high(page);
+}
+
+/*
+ * The use of kmap_atomic/kunmap_atomic is discouraged - kmap/kunmap
+ * gives a more generic (and caching) interface. But kmap_atomic can
+ * be used in IRQ contexts, so in some (very limited) cases we need
+ * it.
+ */
+static inline void *kmap_atomic(struct page *page, enum km_type type)
+{
+	unsigned int idx;
+	unsigned long vaddr;
+
+	/* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
+	inc_preempt_count();
+	if (!PageHighMem(page))
+		return page_address(page);
+
+	idx = type + KM_TYPE_NR*smp_processor_id();
+	vaddr = KMAP_FIX_BEGIN + idx * PAGE_SIZE;
+#ifdef HIGHMEM_DEBUG
+	BUG_ON(!pte_none(*(kmap_pte+idx)));
+#endif
+	set_pte_at(&init_mm, vaddr, kmap_pte+idx, mk_pte(page, kmap_prot));
+	flush_tlb_page(NULL, vaddr);
+
+	return (void*) vaddr;
+}
+
+static inline void kunmap_atomic(void *kvaddr, enum km_type type)
+{
+#ifdef HIGHMEM_DEBUG
+	unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
+	unsigned int idx = type + KM_TYPE_NR*smp_processor_id();
+
+	if (vaddr < KMAP_FIX_BEGIN) { // FIXME
+		dec_preempt_count();
+		preempt_check_resched();
+		return;
+	}
+
+	BUG_ON(vaddr != KMAP_FIX_BEGIN + idx * PAGE_SIZE);
+
+	/*
+	 * force other mappings to Oops if they'll try to access
+	 * this pte without first remap it
+	 */
+	pte_clear(&init_mm, vaddr, kmap_pte+idx);
+	flush_tlb_page(NULL, vaddr);
+#endif
+	dec_preempt_count();
+	preempt_check_resched();
+}
+
+static inline struct page *kmap_atomic_to_page(void *ptr)
+{
+	unsigned long idx, vaddr = (unsigned long) ptr;
+
+	if (vaddr < KMAP_FIX_BEGIN)
+		return virt_to_page(ptr);
+
+	idx = (vaddr - KMAP_FIX_BEGIN) >> PAGE_SHIFT;
+	return pte_page(kmap_pte[idx]);
+}
+
+#define flush_cache_kmaps()	flush_cache_all()
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_POWERPC_HIGHMEM_H */
diff --git a/include/asm-ppc/highmem.h b/include/asm-ppc/highmem.h
deleted file mode 100644
index 1d2c4ef..0000000
--- a/include/asm-ppc/highmem.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * highmem.h: virtual kernel memory mappings for high memory
- *
- * PowerPC version, stolen from the i386 version.
- *
- * Used in CONFIG_HIGHMEM systems for memory pages which
- * are not addressable by direct kernel virtual addresses.
- *
- * Copyright (C) 1999 Gerhard Wichert, Siemens AG
- *		      Gerhard.Wichert@pdb.siemens.de
- *
- *
- * Redesigned the x86 32-bit VM architecture to deal with
- * up to 16 Terrabyte physical memory. With current x86 CPUs
- * we now support up to 64 Gigabytes physical RAM.
- *
- * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
- */
-
-#ifndef _ASM_HIGHMEM_H
-#define _ASM_HIGHMEM_H
-
-#ifdef __KERNEL__
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <asm/kmap_types.h>
-#include <asm/tlbflush.h>
-#include <asm/page.h>
-
-/* undef for production */
-#define HIGHMEM_DEBUG 1
-
-extern pte_t *kmap_pte;
-extern pgprot_t kmap_prot;
-extern pte_t *pkmap_page_table;
-
-/*
- * Right now we initialize only a single pte table. It can be extended
- * easily, subsequent pte tables have to be allocated in one physical
- * chunk of RAM.
- */
-#define PKMAP_BASE 	CONFIG_HIGHMEM_START
-#define LAST_PKMAP 	(1 << PTE_SHIFT)
-#define LAST_PKMAP_MASK (LAST_PKMAP-1)
-#define PKMAP_NR(virt)  ((virt-PKMAP_BASE) >> PAGE_SHIFT)
-#define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-
-#define KMAP_FIX_BEGIN	(PKMAP_BASE + 0x00400000UL)
-
-extern void *kmap_high(struct page *page);
-extern void kunmap_high(struct page *page);
-
-static inline void *kmap(struct page *page)
-{
-	might_sleep();
-	if (!PageHighMem(page))
-		return page_address(page);
-	return kmap_high(page);
-}
-
-static inline void kunmap(struct page *page)
-{
-	BUG_ON(in_interrupt());
-	if (!PageHighMem(page))
-		return;
-	kunmap_high(page);
-}
-
-/*
- * The use of kmap_atomic/kunmap_atomic is discouraged - kmap/kunmap
- * gives a more generic (and caching) interface. But kmap_atomic can
- * be used in IRQ contexts, so in some (very limited) cases we need
- * it.
- */
-static inline void *kmap_atomic(struct page *page, enum km_type type)
-{
-	unsigned int idx;
-	unsigned long vaddr;
-
-	/* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
-	inc_preempt_count();
-	if (!PageHighMem(page))
-		return page_address(page);
-
-	idx = type + KM_TYPE_NR*smp_processor_id();
-	vaddr = KMAP_FIX_BEGIN + idx * PAGE_SIZE;
-#ifdef HIGHMEM_DEBUG
-	BUG_ON(!pte_none(*(kmap_pte+idx)));
-#endif
-	set_pte_at(&init_mm, vaddr, kmap_pte+idx, mk_pte(page, kmap_prot));
-	flush_tlb_page(NULL, vaddr);
-
-	return (void*) vaddr;
-}
-
-static inline void kunmap_atomic(void *kvaddr, enum km_type type)
-{
-#ifdef HIGHMEM_DEBUG
-	unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
-	unsigned int idx = type + KM_TYPE_NR*smp_processor_id();
-
-	if (vaddr < KMAP_FIX_BEGIN) { // FIXME
-		dec_preempt_count();
-		preempt_check_resched();
-		return;
-	}
-
-	BUG_ON(vaddr != KMAP_FIX_BEGIN + idx * PAGE_SIZE);
-
-	/*
-	 * force other mappings to Oops if they'll try to access
-	 * this pte without first remap it
-	 */
-	pte_clear(&init_mm, vaddr, kmap_pte+idx);
-	flush_tlb_page(NULL, vaddr);
-#endif
-	dec_preempt_count();
-	preempt_check_resched();
-}
-
-static inline struct page *kmap_atomic_to_page(void *ptr)
-{
-	unsigned long idx, vaddr = (unsigned long) ptr;
-
-	if (vaddr < KMAP_FIX_BEGIN)
-		return virt_to_page(ptr);
-
-	idx = (vaddr - KMAP_FIX_BEGIN) >> PAGE_SHIFT;
-	return pte_page(kmap_pte[idx]);
-}
-
-#define flush_cache_kmaps()	flush_cache_all()
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_HIGHMEM_H */
-- 
1.2.4