8 files changed, 240 insertions, 0 deletions

diff --git a/include/asm-generic/cache.h b/include/asm-generic/cache.h
new file mode 100644
index 000000000000..1bfcfe5c2237
--- /dev/null
+++ b/include/asm-generic/cache.h
@@ -0,0 +1,12 @@
+#ifndef __ASM_GENERIC_CACHE_H
+#define __ASM_GENERIC_CACHE_H
+/*
+ * 32 bytes appears to be the most common cache line size,
+ * so make that the default here. Architectures with larger
+ * cache lines need to provide their own cache.h.
+ */
+
+#define L1_CACHE_SHIFT          5
+#define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
+
+#endif /* __ASM_GENERIC_CACHE_H */
diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h
new file mode 100644
index 000000000000..ba4ec39a1131
--- /dev/null
+++ b/include/asm-generic/cacheflush.h
@@ -0,0 +1,30 @@
+#ifndef __ASM_CACHEFLUSH_H
+#define __ASM_CACHEFLUSH_H
+
+/* Keep includes the same across arches.  */
+#include <linux/mm.h>
+
+/*
+ * The cache doesn't need to be flushed when TLB entries change when
+ * the cache is mapped to physical memory, not virtual memory
+ */
+#define flush_cache_all()                       do { } while (0)
+#define flush_cache_mm(mm)                      do { } while (0)
+#define flush_cache_dup_mm(mm)                  do { } while (0)
+#define flush_cache_range(vma, start, end)      do { } while (0)
+#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
+#define flush_dcache_page(page)                 do { } while (0)
+#define flush_dcache_mmap_lock(mapping)         do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
+#define flush_icache_range(start, end)          do { } while (0)
+#define flush_icache_page(vma,pg)               do { } while (0)
+#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
+#define flush_cache_vmap(start, end)            do { } while (0)
+#define flush_cache_vunmap(start, end)          do { } while (0)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+        memcpy(dst, src, len)
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+        memcpy(dst, src, len)
+
+#endif /* __ASM_CACHEFLUSH_H */
diff --git a/include/asm-generic/mmu.h b/include/asm-generic/mmu.h
new file mode 100644
index 000000000000..4f4aa56d6b52
--- /dev/null
+++ b/include/asm-generic/mmu.h
@@ -0,0 +1,15 @@
+#ifndef __ASM_GENERIC_MMU_H
+#define __ASM_GENERIC_MMU_H
+
+/*
+ * This is the mmu.h header for nommu implementations.
+ * Architectures with an MMU need something more complex.
+ */
+#ifndef __ASSEMBLY__
+typedef struct {
+        struct vm_list_struct   *vmlist;
+        unsigned long           end_brk;
+} mm_context_t;
+#endif
+
+#endif /* __ASM_GENERIC_MMU_H */
diff --git a/include/asm-generic/mmu_context.h b/include/asm-generic/mmu_context.h
new file mode 100644
index 000000000000..a7eec910ba6c
--- /dev/null
+++ b/include/asm-generic/mmu_context.h
@@ -0,0 +1,45 @@
+#ifndef __ASM_GENERIC_MMU_CONTEXT_H
+#define __ASM_GENERIC_MMU_CONTEXT_H
+
+/*
+ * Generic hooks for NOMMU architectures, which do not need to do
+ * anything special here.
+ */
+
+#include <asm-generic/mm_hooks.h>
+
+struct task_struct;
+struct mm_struct;
+
+static inline void enter_lazy_tlb(struct mm_struct *mm,
+                        struct task_struct *tsk)
+{
+}
+
+static inline int init_new_context(struct task_struct *tsk,
+                        struct mm_struct *mm)
+{
+        return 0;
+}
+
+static inline void destroy_context(struct mm_struct *mm)
+{
+}
+
+static inline void deactivate_mm(struct task_struct *task,
+                        struct mm_struct *mm)
+{
+}
+
+static inline void switch_mm(struct mm_struct *prev,
+                        struct mm_struct *next,
+                        struct task_struct *tsk)
+{
+}
+
+static inline void activate_mm(struct mm_struct *prev_mm,
+                               struct mm_struct *next_mm)
+{
+}
+
+#endif /* __ASM_GENERIC_MMU_CONTEXT_H */
diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
new file mode 100644
index 000000000000..75fec18cdc59
--- /dev/null
+++ b/include/asm-generic/page.h
@@ -0,0 +1,99 @@
+#ifndef __ASM_GENERIC_PAGE_H
+#define __ASM_GENERIC_PAGE_H
+/*
+ * Generic page.h implementation, for NOMMU architectures.
+ * This provides the dummy definitions for the memory management.
+ */
+
+#ifdef CONFIG_MMU
+#error need to prove a real asm/page.h
+#endif
+
+
+/* PAGE_SHIFT determines the page size */
+
+#define PAGE_SHIFT      12
+#ifdef __ASSEMBLY__
+#define PAGE_SIZE       (1 << PAGE_SHIFT)
+#else
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#endif
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+#include <asm/setup.h>
+
+#ifndef __ASSEMBLY__
+
+#define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)      free_page(addr)
+
+#define clear_page(page)        memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct {
+        unsigned long pte;
+} pte_t;
+typedef struct {
+        unsigned long pmd[16];
+} pmd_t;
+typedef struct {
+        unsigned long pgd;
+} pgd_t;
+typedef struct {
+        unsigned long pgprot;
+} pgprot_t;
+typedef struct page *pgtable_t;
+
+#define pte_val(x)      ((x).pte)
+#define pmd_val(x)      ((&x)->pmd[0])
+#define pgd_val(x)      ((x).pgd)
+#define pgprot_val(x)   ((x).pgprot)
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgd(x)        ((pgd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+extern unsigned long memory_start;
+extern unsigned long memory_end;
+
+#endif /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_KERNEL_RAM_BASE_ADDRESS
+#define PAGE_OFFSET             (CONFIG_KERNEL_RAM_BASE_ADDRESS)
+#else
+#define PAGE_OFFSET             (0)
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
+#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
+
+#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
+
+#define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
+#define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
+
+#ifndef page_to_phys
+#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
+#endif
+
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+
+#define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
+                                ((void *)(kaddr) < (void *)memory_end))
+
+#endif /* __ASSEMBLY__ */
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/getorder.h>
+
+#endif /* __ASM_GENERIC_PAGE_H */
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h
new file mode 100644
index 000000000000..9e429d08b1f8
--- /dev/null
+++ b/include/asm-generic/pgalloc.h
@@ -0,0 +1,12 @@
+#ifndef __ASM_GENERIC_PGALLOC_H
+#define __ASM_GENERIC_PGALLOC_H
+/*
+ * an empty file is enough for a nommu architecture
+ */
+#ifdef CONFIG_MMU
+#error need to implement an architecture specific asm/pgalloc.h
+#endif
+
+#define check_pgt_cache()          do { } while (0)
+
+#endif /* __ASM_GENERIC_PGALLOC_H */
diff --git a/include/asm-generic/segment.h b/include/asm-generic/segment.h
new file mode 100644
index 000000000000..5580eace622c
--- /dev/null
+++ b/include/asm-generic/segment.h
@@ -0,0 +1,9 @@
+#ifndef __ASM_GENERIC_SEGMENT_H
+#define __ASM_GENERIC_SEGMENT_H
+/*
+ * Only here because we have some old header files that expect it...
+ *
+ * New architectures probably don't want to have their own version.
+ */
+
+#endif /* __ASM_GENERIC_SEGMENT_H */
diff --git a/include/asm-generic/tlbflush.h b/include/asm-generic/tlbflush.h
new file mode 100644
index 000000000000..c7af037024c7
--- /dev/null
+++ b/include/asm-generic/tlbflush.h
@@ -0,0 +1,18 @@
+#ifndef __ASM_GENERIC_TLBFLUSH_H
+#define __ASM_GENERIC_TLBFLUSH_H
+/*
+ * This is a dummy tlbflush implementation that can be used on all
+ * nommu architectures.
+ * If you have an MMU, you need to write your own functions.
+ */
+#ifdef CONFIG_MMU
+#error need to implement an architecture specific asm/tlbflush.h
+#endif
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+        BUG();
+}
+
+
+#endif /* __ASM_GENERIC_TLBFLUSH_H */