/* MN10300 MMU context allocation and management * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #include <linux/sched.h> #include <linux/mm.h> #include <asm/mmu_context.h> #include <asm/tlbflush.h> #ifdef CONFIG_MN10300_TLB_USE_PIDR /* * list of the MMU contexts last allocated on each CPU */ unsigned long mmu_context_cache[NR_CPUS] = { [0 ... NR_CPUS - 1] = MMU_CONTEXT_FIRST_VERSION * 2 - (1 - MMU_CONTEXT_TLBPID_LOCK_NR), }; #endif /* CONFIG_MN10300_TLB_USE_PIDR */ /* * preemptively set a TLB entry */
void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { unsigned long pteu, ptel, cnx, flags; pte_t pte = *ptep; addr &= PAGE_MASK; ptel = pte_val(pte) & ~(xPTEL_UNUSED1 | xPTEL_UNUSED2); /* make sure the context doesn't migrate and defend against * interference from vmalloc'd regions */ local_irq_save(flags); cnx = ~MMU_NO_CONTEXT; #ifdef CONFIG_MN10300_TLB_USE_PIDR cnx = mm_context(vma->vm_mm); #endif if (cnx != MMU_NO_CONTEXT) { pteu = addr; #ifdef CONFIG_MN10300_TLB_USE_PIDR pteu |= cnx & MMU_CONTEXT_TLBPID_MASK; #endif if (!(pte_val(pte) & _PAGE_NX)) { IPTEU = pteu; if (IPTEL & xPTEL_V) IPTEL = ptel; } DPTEU = pteu; if (DPTEL & xPTEL_V) DPTEL = ptel; } local_irq_restore(flags); }Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 120 | 81.63% | 1 | 33.33% |
| Akira Takeuchi | 19 | 12.93% | 1 | 33.33% |
| Russell King | 8 | 5.44% | 1 | 33.33% |
| Total | 147 | 100.00% | 3 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 158 | 81.03% | 1 | 33.33% |
| Akira Takeuchi | 29 | 14.87% | 1 | 33.33% |
| Russell King | 8 | 4.10% | 1 | 33.33% |
| Total | 195 | 100.00% | 3 | 100.00% |