/* * include/asm-xtensa/highmem.h * * This file is subject to the terms and conditions of the GNU General * Public License. See the file "COPYING" in the main directory of * this archive for more details. * * Copyright (C) 2003 - 2005 Tensilica Inc. * Copyright (C) 2014 Cadence Design Systems Inc. */ #ifndef _XTENSA_HIGHMEM_H #define _XTENSA_HIGHMEM_H #include <linux/wait.h> #include <asm/cacheflush.h> #include <asm/fixmap.h> #include <asm/kmap_types.h> #include <asm/pgtable.h> #define PKMAP_BASE ((FIXADDR_START - \ (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK) #define LAST_PKMAP (PTRS_PER_PTE * DCACHE_N_COLORS) #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_prot PAGE_KERNEL_EXEC #if DCACHE_WAY_SIZE > PAGE_SIZE #define get_pkmap_color get_pkmap_color static inline int get_pkmap_color(struct page *page) { return DCACHE_ALIAS(page_to_phys(page)); } extern unsigned int last_pkmap_nr_arr[]; static inline unsigned int get_next_pkmap_nr(unsigned int color) { last_pkmap_nr_arr[color] = (last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK; return last_pkmap_nr_arr[color] + color; } static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color) { return pkmap_nr < DCACHE_N_COLORS; } static inline int get_pkmap_entries_count(unsigned int color) { return LAST_PKMAP / DCACHE_N_COLORS; } extern wait_queue_head_t pkmap_map_wait_arr[]; static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) { return pkmap_map_wait_arr + color; } #endif extern pte_t *pkmap_page_table; void *kmap_high(struct page *page); void kunmap_high(struct page *page); static inline void *kmap(struct page *page) { /* Check if this memory layout is broken because PKMAP overlaps * page table. */ BUILD_BUG_ON(PKMAP_BASE < XCHAL_PAGE_TABLE_VADDR + XCHAL_PAGE_TABLE_SIZE); BUG_ON(in_interrupt()); 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); } static inline void flush_cache_kmaps(void) { flush_cache_all(); } void *kmap_atomic(struct page *page); void __kunmap_atomic(void *kvaddr); void kmap_init(void); #endif
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
Kbuild | File | 685 B | 0644 |
|
asm-offsets.h | File | 35 B | 0644 |
|
asm-uaccess.h | File | 4.11 KB | 0644 |
|
asmmacro.h | File | 2.76 KB | 0644 |
|
atomic.h | File | 7.38 KB | 0644 |
|
barrier.h | File | 542 B | 0644 |
|
bitops.h | File | 5.08 KB | 0644 |
|
bootparam.h | File | 1.37 KB | 0644 |
|
bugs.h | File | 451 B | 0644 |
|
cache.h | File | 969 B | 0644 |
|
cacheasm.h | File | 3.77 KB | 0644 |
|
cacheflush.h | File | 5.76 KB | 0644 |
|
checksum.h | File | 6 KB | 0644 |
|
cmpxchg.h | File | 3.9 KB | 0644 |
|
coprocessor.h | File | 5.05 KB | 0644 |
|
current.h | File | 675 B | 0644 |
|
delay.h | File | 1.63 KB | 0644 |
|
dma-mapping.h | File | 855 B | 0644 |
|
dma.h | File | 1.79 KB | 0644 |
|
elf.h | File | 5.75 KB | 0644 |
|
fixmap.h | File | 2.5 KB | 0644 |
|
flat.h | File | 686 B | 0644 |
|
ftrace.h | File | 979 B | 0644 |
|
futex.h | File | 2.59 KB | 0644 |
|
highmem.h | File | 2.33 KB | 0644 |
|
hw_breakpoint.h | File | 1.45 KB | 0644 |
|
hw_irq.h | File | 320 B | 0644 |
|
initialize_mmu.h | File | 4.58 KB | 0644 |
|
io.h | File | 2.09 KB | 0644 |
|
irq.h | File | 1.46 KB | 0644 |
|
irqflags.h | File | 1.99 KB | 0644 |
|
kmem_layout.h | File | 2.07 KB | 0644 |
|
mmu.h | File | 462 B | 0644 |
|
mmu_context.h | File | 3.62 KB | 0644 |
|
module.h | File | 525 B | 0644 |
|
mxregs.h | File | 1.3 KB | 0644 |
|
nommu_context.h | File | 602 B | 0644 |
|
page.h | File | 5.69 KB | 0644 |
|
pci-bridge.h | File | 2.16 KB | 0644 |
|
pci.h | File | 1.37 KB | 0644 |
|
perf_event.h | File | 108 B | 0644 |
|
pgalloc.h | File | 1.84 KB | 0644 |
|
pgtable.h | File | 14.89 KB | 0644 |
|
platform.h | File | 1.75 KB | 0644 |
|
processor.h | File | 7.44 KB | 0644 |
|
ptrace.h | File | 3.74 KB | 0644 |
|
regs.h | File | 3.87 KB | 0644 |
|
segment.h | File | 376 B | 0644 |
|
serial.h | File | 443 B | 0644 |
|
shmparam.h | File | 561 B | 0644 |
|
signal.h | File | 502 B | 0644 |
|
smp.h | File | 967 B | 0644 |
|
spinlock.h | File | 4.6 KB | 0644 |
|
spinlock_types.h | File | 412 B | 0644 |
|
stacktrace.h | File | 1.13 KB | 0644 |
|
string.h | File | 2.65 KB | 0644 |
|
switch_to.h | File | 601 B | 0644 |
|
syscall.h | File | 982 B | 0644 |
|
sysmem.h | File | 426 B | 0644 |
|
thread_info.h | File | 3.62 KB | 0644 |
|
timex.h | File | 1.79 KB | 0644 |
|
tlb.h | File | 1.1 KB | 0644 |
|
tlbflush.h | File | 5.53 KB | 0644 |
|
traps.h | File | 1.87 KB | 0644 |
|
types.h | File | 501 B | 0644 |
|
uaccess.h | File | 8.67 KB | 0644 |
|
ucontext.h | File | 540 B | 0644 |
|
unaligned.h | File | 864 B | 0644 |
|
unistd.h | File | 639 B | 0644 |
|
user.h | File | 507 B | 0644 |
|
vectors.h | File | 4.05 KB | 0644 |
|
vga.h | File | 434 B | 0644 |
|