1 /* SPDX-License-Identifier: GPL-2.0 */
16 #include <asm-generic/mm_hooks.h>
24 void get_new_mmu_context(struct mm_struct *mm);
27 int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
29 void destroy_context(struct mm_struct *mm);
37 static inline void tsb_context_switch_ctx(struct mm_struct *mm,  in tsb_context_switch_ctx()  argument
40 	__tsb_context_switch(__pa(mm->pgd),  in tsb_context_switch_ctx()
41 			     &mm->context.tsb_block[MM_TSB_BASE],  in tsb_context_switch_ctx()
43 			     (mm->context.tsb_block[MM_TSB_HUGE].tsb ?  in tsb_context_switch_ctx()
44 			      &mm->context.tsb_block[MM_TSB_HUGE] :  in tsb_context_switch_ctx()
49 			     , __pa(&mm->context.tsb_descr[MM_TSB_BASE]),  in tsb_context_switch_ctx()
53 #define tsb_context_switch(X) tsb_context_switch_ctx(X, 0)
55 void tsb_grow(struct mm_struct *mm,
59 void smp_tsb_sync(struct mm_struct *mm);
61 #define smp_tsb_sync(__mm) do { } while (0)
67 	"\n661:	stxa		%0, [%1] %2\n" \
70 	"	stxa		%0, [%1] %3\n" \
74 	: "r" (CTX_HWBITS((__mm)->context)), \
79 /* Switch the current MM context. */
80 static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *ts…  in switch_mm()  argument
85 	per_cpu(per_cpu_secondary_mm, cpu) = mm;  in switch_mm()
86 	if (unlikely(mm == &init_mm))  in switch_mm()
89 	spin_lock_irqsave(&mm->context.lock, flags);  in switch_mm()
90 	ctx_valid = CTX_VALID(mm->context);  in switch_mm()
92 		get_new_mmu_context(mm);  in switch_mm()
105 	 *		CPU 0			CPU 1  in switch_mm()
120 	 * before the TSB grow performed on cpu1.  cpu1 did not cross-call  in switch_mm()
124 	tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));  in switch_mm()
130 	if (!ctx_valid || !cpumask_test_cpu(cpu, mm_cpumask(mm))) {  in switch_mm()
131 		cpumask_set_cpu(cpu, mm_cpumask(mm));  in switch_mm()
132 		__flush_tlb_mm(CTX_HWBITS(mm->context),  in switch_mm()
135 	spin_unlock_irqrestore(&mm->context.lock, flags);  in switch_mm()
138 #define activate_mm(active_mm, mm) switch_mm(active_mm, mm, NULL)  argument
150 			".word 0x83438000\n\t"	/* rd  %mcdper, %g1 */  in arch_start_context_switch()
151 			"mov %%g1, %0\n\t"  in arch_start_context_switch()
173 			"mov %0, %%g1\n\t"  in finish_arch_post_lock_switch()
174 			".word 0x9d800001\n\t"	/* wr %g0, %g1, %mcdper" */  in finish_arch_post_lock_switch()
175 			".word 0xaf902001\n\t"	/* wrpr %g0, 1, %pmcdper */  in finish_arch_post_lock_switch()
179 		if (current && current->mm && current->mm->context.adi) {  in finish_arch_post_lock_switch()
183 			regs->tstate |= TSTATE_MCDE;  in finish_arch_post_lock_switch()
189 static inline unsigned long mm_untag_mask(struct mm_struct *mm)  in mm_untag_mask()  argument
191        return -1UL >> adi_nbits();  in mm_untag_mask()
194 #include <asm-generic/mmu_context.h>