1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <asm-generic/mm_hooks.h>
30 	mm_context_t ctx;  in get_mmu_context()  local
32 	if (mm->context != NO_CONTEXT)  in get_mmu_context()
38 	ctx = next_mmu_context;  in get_mmu_context()
39 	while (test_and_set_bit(ctx, context_map)) {  in get_mmu_context()
40 		ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx);  in get_mmu_context()
41 		if (ctx > LAST_CONTEXT)  in get_mmu_context()
42 			ctx = 0;  in get_mmu_context()
44 	next_mmu_context = (ctx + 1) & LAST_CONTEXT;  in get_mmu_context()
45 	mm->context = ctx;  in get_mmu_context()
46 	context_mm[ctx] = mm;  in get_mmu_context()
52 #define init_new_context(tsk, mm)	(((mm)->context = NO_CONTEXT), 0)
60 	if (mm->context != NO_CONTEXT) {  in destroy_context()
61 		clear_bit(mm->context, context_map);  in destroy_context()
62 		mm->context = NO_CONTEXT;  in destroy_context()
69 	__asm__ __volatile__ ("movec %0,%%asid" : : "d" (context));  in set_context()
75 	get_mmu_context(tsk->mm);  in switch_mm()
76 	set_context(tsk->mm->context, next->pgd);  in switch_mm()
80  * After we have set current->mm to a new value, this activates
88 	set_context(mm->context, mm->pgd);  in activate_mm()
97 	int asid;  in load_ksp_mmu()  local
106 	mmuar = task->thread.ksp;  in load_ksp_mmu()
117 		pr_info("load_ksp_mmu: non-kernel mm found: 0x%p\n", task->mm);  in load_ksp_mmu()
118 		mm = task->mm;  in load_ksp_mmu()
146 	asid = mm->context & 0xff;  in load_ksp_mmu()
150 	mmu_write(MMUTR, (mmuar & PAGE_MASK) | (asid << MMUTR_IDN) |  in load_ksp_mmu()
151 		(((int)(pte->pte) & (int)CF_PAGE_MMUTR_MASK)  in load_ksp_mmu()
155 		((pte->pte) & CF_PAGE_MMUDR_MASK) | MMUDR_SZ_8KB | MMUDR_X);  in load_ksp_mmu()
181 	mm->context = SUN3_INVALID_CONTEXT;  in init_new_context()
189 	if (mm->context == SUN3_INVALID_CONTEXT)  in get_mmu_context()
190 		mm->context = get_free_context(mm);  in get_mmu_context()
197 	if (mm->context != SUN3_INVALID_CONTEXT)  in destroy_context()
198 		clear_context(mm->context);  in destroy_context()
204 	sun3_put_context(mm->context);  in activate_context()
210 	activate_context(tsk->mm);  in switch_mm()
230 	mm->context = virt_to_phys(mm->pgd);  in init_new_context()
237 		0x80000000 | _PAGE_TABLE, mm->context  in switch_mm_0230()
250 	/* Switch the root pointer. For a 030-only kernel,  in switch_mm_0230()
275 	asm volatile ("movec %0,%%urp" : : "r" (mm->context));  in switch_mm_0460()
305 	next_mm->context = virt_to_phys(next_mm->pgd);  in activate_mm()
315 #include <asm-generic/mmu_context.h>
319 #include <asm-generic/nommu_context.h>