1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/m68k/mm/cache.c
5 * Instruction cache handling
7 * Copyright (C) 1995 Hamish Macdonald
10 #include <linux/module.h>
11 #include <asm/cacheflush.h>
12 #include <asm/traps.h>
15 static unsigned long virt_to_phys_slow(unsigned long vaddr)
20 /* The PLPAR instruction causes an access error if the translation
21 * is not possible. To catch this we use the same exception mechanism
22 * as for user space accesses in <asm/uaccess.h>. */
23 asm volatile (".chip 68060\n"
27 ".section .fixup,\"ax\"\n"
32 ".section __ex_table,\"a\"\n"
39 } else if (CPU_IS_040) {
42 asm volatile (".chip 68040\n\t"
44 "movec %%mmusr, %0\n\t"
49 if (mmusr & MMU_R_040)
50 return (mmusr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
52 WARN_ON_ONCE(!CPU_IS_040_OR_060);
57 /* Push n pages at kernel virtual address and clear the icache */
58 /* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
59 void flush_icache_user_range(unsigned long address, unsigned long endaddr)
61 if (CPU_IS_COLDFIRE) {
62 unsigned long start, end;
63 start = address & ICACHE_SET_MASK;
64 end = endaddr & ICACHE_SET_MASK;
66 flush_cf_icache(0, end);
67 end = ICACHE_MAX_ADDR;
69 flush_cf_icache(start, end);
70 } else if (CPU_IS_040_OR_060) {
74 asm volatile ("nop\n\t"
76 "cpushp %%bc,(%0)\n\t"
78 : : "a" (virt_to_phys_slow(address)));
80 } while (address < endaddr);
83 asm volatile ("movec %%cacr,%0\n\t"
91 void flush_icache_range(unsigned long address, unsigned long endaddr)
94 flush_icache_user_range(address, endaddr);
97 EXPORT_SYMBOL(flush_icache_range);
99 void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
100 unsigned long addr, int len)
102 if (CPU_IS_COLDFIRE) {
103 unsigned long start, end;
104 start = addr & ICACHE_SET_MASK;
105 end = (addr + len) & ICACHE_SET_MASK;
107 flush_cf_icache(0, end);
108 end = ICACHE_MAX_ADDR;
110 flush_cf_icache(start, end);
112 } else if (CPU_IS_040_OR_060) {
113 asm volatile ("nop\n\t"
115 "cpushp %%bc,(%0)\n\t"
117 : : "a" (page_to_phys(page)));
120 asm volatile ("movec %%cacr,%0\n\t"