/* highmem.h: virtual kernel memory mappings for high memory * * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * - Derived from include/asm-i386/highmem.h * * See Documentation/frv/mmu-layout.txt for more information. * * 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; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_HIGHMEM_H #define _ASM_HIGHMEM_H #ifdef __KERNEL__ #include <linux/init.h> #include <linux/highmem.h> #include <asm/mem-layout.h> #include <asm/spr-regs.h> #include <asm/mb-regs.h> #define NR_TLB_LINES 64 /* number of lines in the TLB */ #ifndef __ASSEMBLY__ #include <linux/interrupt.h> #include <asm/kmap_types.h> #include <asm/pgtable.h> #ifdef CONFIG_DEBUG_HIGHMEM #define HIGHMEM_DEBUG 1 #else #define HIGHMEM_DEBUG 0 #endif /* declarations for highmem.c */ extern unsigned long highstart_pfn, highend_pfn; #define kmap_prot PAGE_KERNEL #define kmap_pte ______kmap_pte_in_TLB extern pte_t *pkmap_page_table; #define flush_cache_kmaps() do { } while (0) /* * 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 LAST_PKMAP PTRS_PER_PTE #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)) extern void *kmap_high(struct page *page); extern void kunmap_high(struct page *page); extern void *kmap(struct page *page); extern void kunmap(struct page *page); #endif /* !__ASSEMBLY__ */ /* * 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. */ #define KMAP_ATOMIC_CACHE_DAMR 8 #ifndef __ASSEMBLY__ #define __kmap_atomic_primary(cached, paddr, ampr) \ ({ \ unsigned long damlr, dampr; \ \ dampr = paddr | xAMPRx_L | xAMPRx_M | xAMPRx_S | xAMPRx_SS_16Kb | xAMPRx_V; \ \ if (!cached) \ asm volatile("movgs %0,dampr"#ampr :: "r"(dampr) : "memory"); \ else \ /* cache flush page attachment point */ \ asm volatile("movgs %0,iampr"#ampr"\n" \ "movgs %0,dampr"#ampr"\n" \ :: "r"(dampr) : "memory" \ ); \ \ asm("movsg damlr"#ampr",%0" : "=r"(damlr)); \ \ /*printk("DAMR"#ampr": PRIM sl=%d L=%08lx P=%08lx\n", type, damlr, dampr);*/ \ \ (void *) damlr; \ }) #define __kmap_atomic_secondary(slot, paddr) \ ({ \ unsigned long damlr = KMAP_ATOMIC_SECONDARY_FRAME + (slot) * PAGE_SIZE; \ unsigned long dampr = paddr | xAMPRx_L | xAMPRx_M | xAMPRx_S | xAMPRx_SS_16Kb | xAMPRx_V; \ \ asm volatile("movgs %0,tplr \n" \ "movgs %1,tppr \n" \ "tlbpr %0,gr0,#2,#1" \ : : "r"(damlr), "r"(dampr) : "memory"); \ \ /*printk("TLB: SECN sl=%d L=%08lx P=%08lx\n", slot, damlr, dampr);*/ \ \ (void *) damlr; \ }) static inline void *kmap_atomic_primary(struct page *page) { unsigned long paddr; pagefault_disable(); paddr = page_to_phys(page); return __kmap_atomic_primary(1, paddr, 2); } #define __kunmap_atomic_primary(cached, ampr) \ do { \ asm volatile("movgs gr0,dampr"#ampr"\n" ::: "memory"); \ if (cached) \ asm volatile("movgs gr0,iampr"#ampr"\n" ::: "memory"); \ } while(0) #define __kunmap_atomic_secondary(slot, vaddr) \ do { \ asm volatile("tlbpr %0,gr0,#4,#1" : : "r"(vaddr) : "memory"); \ } while(0) static inline void kunmap_atomic_primary(void *kvaddr) { __kunmap_atomic_primary(1, 2); pagefault_enable(); } void *kmap_atomic(struct page *page); void __kunmap_atomic(void *kvaddr); #endif /* !__ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_HIGHMEM_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 290 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 4.97 KB | 0644 |
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atomic_defs.h | File | 4.66 KB | 0644 |
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ax88796.h | File | 751 B | 0644 |
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barrier.h | File | 720 B | 0644 |
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bitops.h | File | 7.12 KB | 0644 |
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bug.h | File | 1.36 KB | 0644 |
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bugs.h | File | 445 B | 0644 |
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busctl-regs.h | File | 2.02 KB | 0644 |
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cache.h | File | 727 B | 0644 |
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cacheflush.h | File | 3.05 KB | 0644 |
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checksum.h | File | 4.53 KB | 0644 |
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cmpxchg.h | File | 4.56 KB | 0644 |
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cpu-irqs.h | File | 2.59 KB | 0644 |
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current.h | File | 685 B | 0644 |
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delay.h | File | 1.28 KB | 0644 |
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div64.h | File | 31 B | 0644 |
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dm9000.h | File | 1.12 KB | 0644 |
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dma-mapping.h | File | 448 B | 0644 |
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dma.h | File | 3.63 KB | 0644 |
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elf.h | File | 5.18 KB | 0644 |
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emergency-restart.h | File | 149 B | 0644 |
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fpu.h | File | 261 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 416 B | 0644 |
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gdb-stub.h | File | 4.47 KB | 0644 |
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gpio-regs.h | File | 3.64 KB | 0644 |
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hardirq.h | File | 666 B | 0644 |
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highmem.h | File | 4.09 KB | 0644 |
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hw_irq.h | File | 484 B | 0644 |
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io.h | File | 9.75 KB | 0644 |
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irc-regs.h | File | 1.78 KB | 0644 |
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irq.h | File | 760 B | 0644 |
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irq_regs.h | File | 764 B | 0644 |
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irqflags.h | File | 3.71 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 123 B | 0644 |
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linkage.h | File | 114 B | 0644 |
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local.h | File | 140 B | 0644 |
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local64.h | File | 33 B | 0644 |
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math-emu.h | File | 6.38 KB | 0644 |
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mb-regs.h | File | 6.94 KB | 0644 |
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mb86943a.h | File | 1.84 KB | 0644 |
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mb93091-fpga-irqs.h | File | 1.06 KB | 0644 |
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mb93093-fpga-irqs.h | File | 789 B | 0644 |
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mb93493-irqs.h | File | 1.69 KB | 0644 |
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mb93493-regs.h | File | 12.46 KB | 0644 |
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mem-layout.h | File | 2.21 KB | 0644 |
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mmu.h | File | 1.26 KB | 0644 |
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mmu_context.h | File | 1.38 KB | 0644 |
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module.h | File | 617 B | 0644 |
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page.h | File | 2.08 KB | 0644 |
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pci.h | File | 1.23 KB | 0644 |
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percpu.h | File | 147 B | 0644 |
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perf_event.h | File | 487 B | 0644 |
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pgalloc.h | File | 1.87 KB | 0644 |
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pgtable.h | File | 16.02 KB | 0644 |
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processor.h | File | 2.85 KB | 0644 |
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ptrace.h | File | 1.2 KB | 0644 |
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sections.h | File | 1.1 KB | 0644 |
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segment.h | File | 1.08 KB | 0644 |
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serial-regs.h | File | 1.63 KB | 0644 |
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serial.h | File | 308 B | 0644 |
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setup.h | File | 641 B | 0644 |
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shmparam.h | File | 183 B | 0644 |
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signal.h | File | 141 B | 0644 |
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smp.h | File | 139 B | 0644 |
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spinlock.h | File | 516 B | 0644 |
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spr-regs.h | File | 17.93 KB | 0644 |
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string.h | File | 1.36 KB | 0644 |
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switch_to.h | File | 1.07 KB | 0644 |
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syscall.h | File | 2.73 KB | 0644 |
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termios.h | File | 425 B | 0644 |
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thread_info.h | File | 3.48 KB | 0644 |
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timer-regs.h | File | 3.63 KB | 0644 |
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timex.h | File | 720 B | 0644 |
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tlb.h | File | 615 B | 0644 |
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tlbflush.h | File | 1.88 KB | 0644 |
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topology.h | File | 229 B | 0644 |
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types.h | File | 595 B | 0644 |
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uaccess.h | File | 6.79 KB | 0644 |
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ucontext.h | File | 281 B | 0644 |
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unaligned.h | File | 694 B | 0644 |
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unistd.h | File | 928 B | 0644 |
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user.h | File | 3.29 KB | 0644 |
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vga.h | File | 464 B | 0644 |
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virtconvert.h | File | 1.09 KB | 0644 |
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xor.h | File | 29 B | 0644 |
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