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 + +/* + * 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 + +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 + +#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 +#include + +#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 */