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Diffstat (limited to '')
| -rw-r--r-- | arch/arc/include/asm/highmem.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arc/include/asm/highmem.h b/arch/arc/include/asm/highmem.h new file mode 100644 index 000000000..a6b8e2c35 --- /dev/null +++ b/arch/arc/include/asm/highmem.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com) + */ + +#ifndef _ASM_HIGHMEM_H +#define _ASM_HIGHMEM_H + +#ifdef CONFIG_HIGHMEM + +#include <uapi/asm/page.h> +#include <asm/kmap_size.h> + +#define FIXMAP_SIZE PGDIR_SIZE +#define PKMAP_SIZE PGDIR_SIZE + +/* start after vmalloc area */ +#define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE) + +#define FIX_KMAP_SLOTS (KM_MAX_IDX * NR_CPUS) +#define FIX_KMAP_BEGIN (0UL) +#define FIX_KMAP_END ((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1) + +#define FIXADDR_TOP (FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT)) + +/* + * This should be converted to the asm-generic version, but of course this + * is needlessly different from all other architectures. Sigh - tglx + */ +#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) +#define __virt_to_fix(x) (((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT) + +/* start after fixmap area */ +#define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE) +#define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT) +#define LAST_PKMAP_MASK (LAST_PKMAP - 1) +#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) +#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT) + +#include <asm/cacheflush.h> + +extern void kmap_init(void); + +#define arch_kmap_local_post_unmap(vaddr) \ + local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE) + +static inline void flush_cache_kmaps(void) +{ + flush_cache_all(); +} +#endif + +#endif |