Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * include/asm-xtensa/highmem.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * This file is subject to the terms and conditions of the GNU General
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Public License.  See the file "COPYING" in the main directory of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * this archive for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Copyright (C) 2003 - 2005 Tensilica Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 2014 Cadence Design Systems Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #ifndef _XTENSA_HIGHMEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define _XTENSA_HIGHMEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/pgtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/kmap_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define PKMAP_BASE		((FIXADDR_START - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 				  (LAST_PKMAP + 1) * PAGE_SIZE) & PMD_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LAST_PKMAP		(PTRS_PER_PTE * DCACHE_N_COLORS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define kmap_prot		PAGE_KERNEL_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #if DCACHE_WAY_SIZE > PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define get_pkmap_color get_pkmap_color
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static inline int get_pkmap_color(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	return DCACHE_ALIAS(page_to_phys(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) extern unsigned int last_pkmap_nr_arr[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline unsigned int get_next_pkmap_nr(unsigned int color)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	last_pkmap_nr_arr[color] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return last_pkmap_nr_arr[color] + color;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static inline int no_more_pkmaps(unsigned int pkmap_nr, unsigned int color)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	return pkmap_nr < DCACHE_N_COLORS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static inline int get_pkmap_entries_count(unsigned int color)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	return LAST_PKMAP / DCACHE_N_COLORS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) extern wait_queue_head_t pkmap_map_wait_arr[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	return pkmap_map_wait_arr + color;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) extern pte_t *pkmap_page_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static inline void flush_cache_kmaps(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	flush_cache_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) void kmap_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #endif