cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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highmem.h (2167B)

      1/*
      2 * include/asm-xtensa/highmem.h
      3 *
      4 * This file is subject to the terms and conditions of the GNU General
      5 * Public License.  See the file "COPYING" in the main directory of
      6 * this archive for more details.
      7 *
      8 * Copyright (C) 2003 - 2005 Tensilica Inc.
      9 * Copyright (C) 2014 Cadence Design Systems Inc.
     10 */
     11
     12#ifndef _XTENSA_HIGHMEM_H
     13#define _XTENSA_HIGHMEM_H
     14
     15#ifdef CONFIG_HIGHMEM
     16#include <linux/wait.h>
     17#include <linux/pgtable.h>
     18#include <asm/cacheflush.h>
     19#include <asm/fixmap.h>
     20
     21#define PKMAP_BASE		((FIXADDR_START -			\
     22				  (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK)
     23#define LAST_PKMAP		(PTRS_PER_PTE * DCACHE_N_COLORS)
     24#define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
     25#define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
     26#define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
     27
     28#define kmap_prot		PAGE_KERNEL_EXEC
     29
     30#if DCACHE_WAY_SIZE > PAGE_SIZE
     31#define get_pkmap_color get_pkmap_color
     32static inline int get_pkmap_color(struct page *page)
     33{
     34	return DCACHE_ALIAS(page_to_phys(page));
     35}
     36
     37extern unsigned int last_pkmap_nr_arr[];
     38
     39static inline unsigned int get_next_pkmap_nr(unsigned int color)
     40{
     41	last_pkmap_nr_arr[color] =
     42		(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK;
     43	return last_pkmap_nr_arr[color] + color;
     44}
     45
     46static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color)
     47{
     48	return pkmap_nr < DCACHE_N_COLORS;
     49}
     50
     51static inline int get_pkmap_entries_count(unsigned int color)
     52{
     53	return LAST_PKMAP / DCACHE_N_COLORS;
     54}
     55
     56extern wait_queue_head_t pkmap_map_wait_arr[];
     57
     58static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
     59{
     60	return pkmap_map_wait_arr + color;
     61}
     62
     63enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn);
     64#define arch_kmap_local_map_idx		kmap_local_map_idx
     65
     66enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr);
     67#define arch_kmap_local_unmap_idx	kmap_local_unmap_idx
     68
     69#endif
     70
     71extern pte_t *pkmap_page_table;
     72
     73static inline void flush_cache_kmaps(void)
     74{
     75	flush_cache_all();
     76}
     77
     78#define arch_kmap_local_post_unmap(vaddr)	\
     79	local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
     80
     81void kmap_init(void);
     82
     83#endif /* CONFIG_HIGHMEM */
     84#endif