[PATCH 01/15] powerpc: move asm/hignmem.h
sfr at canb.auug.org.au
sfr at canb.auug.org.au
Wed Apr 5 15:10:35 EST 2006
From: Stephen Rothwell <sfr at 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 at 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 at 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 at 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 at 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 at 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
More information about the Linuxppc-dev
mailing list