CRIS: Drop support for the CRIS port

[sfrench/cifs-2.6.git] / arch / cris / mm / tlb.c

diff --git a/arch/cris/mm/tlb.c b/arch/cris/mm/tlb.c
deleted file mode 100644 (file)
index e0dbea6..0000000
--- a/arch/cris/mm/tlb.c
+++ /dev/null
@@ -1,117 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/cris/mm/tlb.c
- *
- *  Copyright (C) 2000, 2001  Axis Communications AB
- *  
- *  Authors:   Bjorn Wesen (bjornw@axis.com)
- *
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/mm_types.h>
-
-#include <asm/tlb.h>
-
-#define D(x)
-
-/* The TLB can host up to 64 different mm contexts at the same time.
- * The running context is R_MMU_CONTEXT, and each TLB entry contains a
- * page_id that has to match to give a hit. In page_id_map, we keep track
- * of which mm we have assigned to which page_id, so that we know when
- * to invalidate TLB entries.
- *
- * The last page_id is never running - it is used as an invalid page_id
- * so we can make TLB entries that will never match.
- *
- * Notice that we need to make the flushes atomic, otherwise an interrupt
- * handler that uses vmalloced memory might cause a TLB load in the middle
- * of a flush causing.
- */
-
-struct mm_struct *page_id_map[NUM_PAGEID];
-static int map_replace_ptr = 1;  /* which page_id_map entry to replace next */
-
-/* the following functions are similar to those used in the PPC port */
-
-static inline void
-alloc_context(struct mm_struct *mm)
-{
-       struct mm_struct *old_mm;
-
-       D(printk("tlb: alloc context %d (%p)\n", map_replace_ptr, mm));
-
-       /* did we replace an mm ? */
-
-       old_mm = page_id_map[map_replace_ptr];
-
-       if(old_mm) {
-               /* throw out any TLB entries belonging to the mm we replace
-                * in the map
-                */
-               flush_tlb_mm(old_mm);
-
-               old_mm->context.page_id = NO_CONTEXT;
-       }
-
-       /* insert it into the page_id_map */
-
-       mm->context.page_id = map_replace_ptr;
-       page_id_map[map_replace_ptr] = mm;
-
-       map_replace_ptr++;
-
-       if(map_replace_ptr == INVALID_PAGEID)
-               map_replace_ptr = 0;         /* wrap around */  
-}
-
-/* 
- * if needed, get a new MMU context for the mm. otherwise nothing is done.
- */
-
-void
-get_mmu_context(struct mm_struct *mm)
-{
-       if(mm->context.page_id == NO_CONTEXT)
-               alloc_context(mm);
-}
-
-/* called by __exit_mm to destroy the used MMU context if any before
- * destroying the mm itself. this is only called when the last user of the mm
- * drops it.
- *
- * the only thing we really need to do here is mark the used PID slot
- * as empty.
- */
-
-void
-destroy_context(struct mm_struct *mm)
-{
-       if(mm->context.page_id != NO_CONTEXT) {
-               D(printk("destroy_context %d (%p)\n", mm->context.page_id, mm));
-               flush_tlb_mm(mm);  /* TODO this might be redundant ? */
-               page_id_map[mm->context.page_id] = NULL;
-       }
-}
-
-/* called once during VM initialization, from init.c */
-
-void __init
-tlb_init(void)
-{
-       int i;
-
-       /* clear the page_id map */
-
-       for (i = 1; i < ARRAY_SIZE(page_id_map); i++)
-               page_id_map[i] = NULL;
-       
-       /* invalidate the entire TLB */
-
-       flush_tlb_all();
-
-       /* the init_mm has context 0 from the boot */
-
-       page_id_map[0] = &init_mm;
-}