/* * Copyright 2010 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for * more details. * * Handle issues around the Tile "home cache" model of coherence. */ #ifndef _ASM_TILE_HOMECACHE_H #define _ASM_TILE_HOMECACHE_H #include <asm/page.h> #include <linux/cpumask.h> struct page; struct task_struct; struct vm_area_struct; struct zone; /* * Coherence point for the page is its memory controller. * It is not present in any cache (L1 or L2). */ #define PAGE_HOME_UNCACHED -1 /* * Is this page immutable (unwritable) and thus able to be cached more * widely than would otherwise be possible? This means we have "nc" set. */ #define PAGE_HOME_IMMUTABLE -2 /* * Each cpu considers its own cache to be the home for the page, * which makes it incoherent. */ #define PAGE_HOME_INCOHERENT -3 /* Home for the page is distributed via hash-for-home. */ #define PAGE_HOME_HASH -4 /* Support wrapper to use instead of explicit hv_flush_remote(). */ extern void flush_remote(unsigned long cache_pfn, unsigned long cache_length, const struct cpumask *cache_cpumask, HV_VirtAddr tlb_va, unsigned long tlb_length, unsigned long tlb_pgsize, const struct cpumask *tlb_cpumask, HV_Remote_ASID *asids, int asidcount); /* Set homing-related bits in a PTE (can also pass a pgprot_t). */ extern pte_t pte_set_home(pte_t pte, int home); /* Do a cache eviction on the specified cpus. */ extern void homecache_evict(const struct cpumask *mask); /* * Change a kernel page's homecache. It must not be mapped in user space. * If !CONFIG_HOMECACHE, only usable on LOWMEM, and can only be called when * no other cpu can reference the page, and causes a full-chip cache/TLB flush. */ extern void homecache_change_page_home(struct page *, int order, int home); /* * Flush a page out of whatever cache(s) it is in. * This is more than just finv, since it properly handles waiting * for the data to reach memory, but it can be quite * heavyweight, particularly on incoherent or immutable memory. */ extern void homecache_finv_page(struct page *); /* * Flush a page out of the specified home cache. * Note that the specified home need not be the actual home of the page, * as for example might be the case when coordinating with I/O devices. */ extern void homecache_finv_map_page(struct page *, int home); /* * Allocate a page with the given GFP flags, home, and optionally * node. These routines are actually just wrappers around the normal * alloc_pages() / alloc_pages_node() functions, which set and clear * a per-cpu variable to communicate with homecache_new_kernel_page(). * If !CONFIG_HOMECACHE, uses homecache_change_page_home(). */ extern struct page *homecache_alloc_pages(gfp_t gfp_mask, unsigned int order, int home); extern struct page *homecache_alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order, int home); #define homecache_alloc_page(gfp_mask, home) \ homecache_alloc_pages(gfp_mask, 0, home) /* * These routines are just pass-throughs to free_pages() when * we support full homecaching. If !CONFIG_HOMECACHE, then these * routines use homecache_change_page_home() to reset the home * back to the default before returning the page to the allocator. */ void __homecache_free_pages(struct page *, unsigned int order); void homecache_free_pages(unsigned long addr, unsigned int order); #define __homecache_free_page(page) __homecache_free_pages((page), 0) #define homecache_free_page(page) homecache_free_pages((page), 0) /* * Report the page home for LOWMEM pages by examining their kernel PTE, * or for highmem pages as the default home. */ extern int page_home(struct page *); #define homecache_migrate_kthread() do {} while (0) #define homecache_kpte_lock() 0 #define homecache_kpte_unlock(flags) do {} while (0) #endif /* _ASM_TILE_HOMECACHE_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 439 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 5.14 KB | 0644 |
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atomic_32.h | File | 8.91 KB | 0644 |
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atomic_64.h | File | 5.51 KB | 0644 |
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backtrace.h | File | 3.98 KB | 0644 |
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barrier.h | File | 2.89 KB | 0644 |
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bitops.h | File | 2.37 KB | 0644 |
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bitops_32.h | File | 4.01 KB | 0644 |
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bitops_64.h | File | 2.67 KB | 0644 |
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cache.h | File | 2.6 KB | 0644 |
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cacheflush.h | File | 4.94 KB | 0644 |
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checksum.h | File | 1.23 KB | 0644 |
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cmpxchg.h | File | 3.47 KB | 0644 |
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compat.h | File | 7.38 KB | 0644 |
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current.h | File | 947 B | 0644 |
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delay.h | File | 1.1 KB | 0644 |
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device.h | File | 978 B | 0644 |
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div64.h | File | 319 B | 0644 |
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dma-mapping.h | File | 1.82 KB | 0644 |
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dma.h | File | 762 B | 0644 |
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elf.h | File | 5.42 KB | 0644 |
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fixmap.h | File | 2.73 KB | 0644 |
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ftrace.h | File | 1.08 KB | 0644 |
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futex.h | File | 4.23 KB | 0644 |
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hardirq.h | File | 1.28 KB | 0644 |
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hardwall.h | File | 1.08 KB | 0644 |
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highmem.h | File | 2.08 KB | 0644 |
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homecache.h | File | 4.21 KB | 0644 |
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hugetlb.h | File | 3.04 KB | 0644 |
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hv_driver.h | File | 1.92 KB | 0644 |
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ide.h | File | 758 B | 0644 |
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insn.h | File | 1.79 KB | 0644 |
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io.h | File | 12.43 KB | 0644 |
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irq.h | File | 3.11 KB | 0644 |
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irq_work.h | File | 283 B | 0644 |
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irqflags.h | File | 10.55 KB | 0644 |
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jump_label.h | File | 1.47 KB | 0644 |
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kdebug.h | File | 769 B | 0644 |
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kexec.h | File | 2.23 KB | 0644 |
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kgdb.h | File | 1.99 KB | 0644 |
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kmap_types.h | File | 1.02 KB | 0644 |
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kprobes.h | File | 2.19 KB | 0644 |
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linkage.h | File | 1.46 KB | 0644 |
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mmu.h | File | 965 B | 0644 |
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mmu_context.h | File | 4.5 KB | 0644 |
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mmzone.h | File | 2.07 KB | 0644 |
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module.h | File | 1.12 KB | 0644 |
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page.h | File | 10.32 KB | 0644 |
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pci.h | File | 6.58 KB | 0644 |
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percpu.h | File | 1.79 KB | 0644 |
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perf_event.h | File | 766 B | 0644 |
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pgalloc.h | File | 4.76 KB | 0644 |
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pgtable.h | File | 15.66 KB | 0644 |
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pgtable_32.h | File | 4.08 KB | 0644 |
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pgtable_64.h | File | 5.11 KB | 0644 |
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pmc.h | File | 2.15 KB | 0644 |
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processor.h | File | 10.62 KB | 0644 |
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ptrace.h | File | 2.96 KB | 0644 |
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sections.h | File | 1.37 KB | 0644 |
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setup.h | File | 1.63 KB | 0644 |
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sigframe.h | File | 956 B | 0644 |
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signal.h | File | 1.07 KB | 0644 |
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smp.h | File | 3.98 KB | 0644 |
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spinlock.h | File | 741 B | 0644 |
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spinlock_32.h | File | 2.9 KB | 0644 |
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spinlock_64.h | File | 3.88 KB | 0644 |
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spinlock_types.h | File | 1.58 KB | 0644 |
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stack.h | File | 2.59 KB | 0644 |
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string.h | File | 1.19 KB | 0644 |
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switch_to.h | File | 2.75 KB | 0644 |
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syscall.h | File | 2.88 KB | 0644 |
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syscalls.h | File | 2.35 KB | 0644 |
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thread_info.h | File | 5.54 KB | 0644 |
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tile-desc.h | File | 650 B | 0644 |
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tile-desc_32.h | File | 12.54 KB | 0644 |
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tile-desc_64.h | File | 10.83 KB | 0644 |
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timex.h | File | 1.71 KB | 0644 |
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tlb.h | File | 878 B | 0644 |
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tlbflush.h | File | 3.99 KB | 0644 |
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topology.h | File | 1.52 KB | 0644 |
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traps.h | File | 2.44 KB | 0644 |
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uaccess.h | File | 12.77 KB | 0644 |
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unaligned.h | File | 1.56 KB | 0644 |
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unistd.h | File | 777 B | 0644 |
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user.h | File | 717 B | 0644 |
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vdso.h | File | 1.84 KB | 0644 |
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vga.h | File | 1.05 KB | 0644 |
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word-at-a-time.h | File | 1.07 KB | 0644 |
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