[POWERPC] User rheap from arch/powerpc/lib
Removed rheap in arch/ppc/lib and changed build system to use the one in arch/powerpc/lib. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
parent
3fae4210ba
commit
b99ab6a8c7
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@ -23,7 +23,5 @@ obj-$(CONFIG_SMP) += locks.o
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endif
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endif
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# Temporary hack until we have migrated to asm-powerpc
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# Temporary hack until we have migrated to asm-powerpc
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ifeq ($(CONFIG_PPC_MERGE),y)
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obj-$(CONFIG_8xx) += rheap.o
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obj-$(CONFIG_8xx) += rheap.o
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obj-$(CONFIG_CPM2) += rheap.o
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obj-$(CONFIG_CPM2) += rheap.o
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endif
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@ -3,6 +3,3 @@
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#
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#
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obj-y := checksum.o string.o div64.o
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obj-y := checksum.o string.o div64.o
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obj-$(CONFIG_8xx) += rheap.o
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obj-$(CONFIG_CPM2) += rheap.o
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@ -1,695 +0,0 @@
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/*
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* A Remote Heap. Remote means that we don't touch the memory that the
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* heap points to. Normal heap implementations use the memory they manage
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* to place their list. We cannot do that because the memory we manage may
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* have special properties, for example it is uncachable or of different
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* endianess.
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*
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* Author: Pantelis Antoniou <panto@intracom.gr>
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*
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* 2004 (c) INTRACOM S.A. Greece. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <asm/rheap.h>
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/*
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* Fixup a list_head, needed when copying lists. If the pointers fall
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* between s and e, apply the delta. This assumes that
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* sizeof(struct list_head *) == sizeof(unsigned long *).
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*/
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static inline void fixup(unsigned long s, unsigned long e, int d,
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struct list_head *l)
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{
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unsigned long *pp;
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pp = (unsigned long *)&l->next;
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if (*pp >= s && *pp < e)
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*pp += d;
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pp = (unsigned long *)&l->prev;
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if (*pp >= s && *pp < e)
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*pp += d;
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}
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/* Grow the allocated blocks */
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static int grow(rh_info_t * info, int max_blocks)
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{
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rh_block_t *block, *blk;
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int i, new_blocks;
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int delta;
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unsigned long blks, blke;
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if (max_blocks <= info->max_blocks)
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return -EINVAL;
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new_blocks = max_blocks - info->max_blocks;
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block = kmalloc(sizeof(rh_block_t) * max_blocks, GFP_KERNEL);
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if (block == NULL)
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return -ENOMEM;
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if (info->max_blocks > 0) {
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/* copy old block area */
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memcpy(block, info->block,
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sizeof(rh_block_t) * info->max_blocks);
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delta = (char *)block - (char *)info->block;
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/* and fixup list pointers */
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blks = (unsigned long)info->block;
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blke = (unsigned long)(info->block + info->max_blocks);
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for (i = 0, blk = block; i < info->max_blocks; i++, blk++)
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fixup(blks, blke, delta, &blk->list);
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fixup(blks, blke, delta, &info->empty_list);
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fixup(blks, blke, delta, &info->free_list);
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fixup(blks, blke, delta, &info->taken_list);
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/* free the old allocated memory */
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if ((info->flags & RHIF_STATIC_BLOCK) == 0)
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kfree(info->block);
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}
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info->block = block;
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info->empty_slots += new_blocks;
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info->max_blocks = max_blocks;
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info->flags &= ~RHIF_STATIC_BLOCK;
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/* add all new blocks to the free list */
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for (i = 0, blk = block + info->max_blocks; i < new_blocks; i++, blk++)
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list_add(&blk->list, &info->empty_list);
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return 0;
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}
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/*
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* Assure at least the required amount of empty slots. If this function
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* causes a grow in the block area then all pointers kept to the block
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* area are invalid!
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*/
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static int assure_empty(rh_info_t * info, int slots)
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{
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int max_blocks;
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/* This function is not meant to be used to grow uncontrollably */
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if (slots >= 4)
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return -EINVAL;
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/* Enough space */
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if (info->empty_slots >= slots)
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return 0;
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/* Next 16 sized block */
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max_blocks = ((info->max_blocks + slots) + 15) & ~15;
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return grow(info, max_blocks);
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}
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static rh_block_t *get_slot(rh_info_t * info)
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{
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rh_block_t *blk;
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/* If no more free slots, and failure to extend. */
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/* XXX: You should have called assure_empty before */
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if (info->empty_slots == 0) {
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printk(KERN_ERR "rh: out of slots; crash is imminent.\n");
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return NULL;
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}
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/* Get empty slot to use */
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blk = list_entry(info->empty_list.next, rh_block_t, list);
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list_del_init(&blk->list);
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info->empty_slots--;
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/* Initialize */
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blk->start = 0;
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blk->size = 0;
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blk->owner = NULL;
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return blk;
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}
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static inline void release_slot(rh_info_t * info, rh_block_t * blk)
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{
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list_add(&blk->list, &info->empty_list);
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info->empty_slots++;
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}
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static void attach_free_block(rh_info_t * info, rh_block_t * blkn)
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{
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rh_block_t *blk;
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rh_block_t *before;
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rh_block_t *after;
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rh_block_t *next;
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int size;
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unsigned long s, e, bs, be;
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struct list_head *l;
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/* We assume that they are aligned properly */
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size = blkn->size;
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s = blkn->start;
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e = s + size;
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/* Find the blocks immediately before and after the given one
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* (if any) */
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before = NULL;
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after = NULL;
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next = NULL;
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list_for_each(l, &info->free_list) {
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blk = list_entry(l, rh_block_t, list);
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bs = blk->start;
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be = bs + blk->size;
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if (next == NULL && s >= bs)
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next = blk;
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if (be == s)
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before = blk;
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if (e == bs)
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after = blk;
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/* If both are not null, break now */
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if (before != NULL && after != NULL)
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break;
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}
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/* Now check if they are really adjacent */
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if (before && s != (before->start + before->size))
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before = NULL;
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if (after && e != after->start)
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after = NULL;
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/* No coalescing; list insert and return */
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if (before == NULL && after == NULL) {
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if (next != NULL)
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list_add(&blkn->list, &next->list);
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else
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list_add(&blkn->list, &info->free_list);
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return;
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}
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/* We don't need it anymore */
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release_slot(info, blkn);
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/* Grow the before block */
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if (before != NULL && after == NULL) {
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before->size += size;
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return;
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}
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/* Grow the after block backwards */
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if (before == NULL && after != NULL) {
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after->start -= size;
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after->size += size;
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return;
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}
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/* Grow the before block, and release the after block */
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before->size += size + after->size;
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list_del(&after->list);
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release_slot(info, after);
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}
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static void attach_taken_block(rh_info_t * info, rh_block_t * blkn)
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{
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rh_block_t *blk;
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struct list_head *l;
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/* Find the block immediately before the given one (if any) */
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list_for_each(l, &info->taken_list) {
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blk = list_entry(l, rh_block_t, list);
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if (blk->start > blkn->start) {
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list_add_tail(&blkn->list, &blk->list);
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return;
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}
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}
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list_add_tail(&blkn->list, &info->taken_list);
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}
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/*
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* Create a remote heap dynamically. Note that no memory for the blocks
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* are allocated. It will upon the first allocation
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*/
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rh_info_t *rh_create(unsigned int alignment)
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{
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rh_info_t *info;
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/* Alignment must be a power of two */
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if ((alignment & (alignment - 1)) != 0)
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return ERR_PTR(-EINVAL);
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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if (info == NULL)
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return ERR_PTR(-ENOMEM);
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info->alignment = alignment;
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/* Initially everything as empty */
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info->block = NULL;
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info->max_blocks = 0;
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info->empty_slots = 0;
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info->flags = 0;
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INIT_LIST_HEAD(&info->empty_list);
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INIT_LIST_HEAD(&info->free_list);
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INIT_LIST_HEAD(&info->taken_list);
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return info;
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}
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/*
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* Destroy a dynamically created remote heap. Deallocate only if the areas
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* are not static
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*/
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void rh_destroy(rh_info_t * info)
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{
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if ((info->flags & RHIF_STATIC_BLOCK) == 0 && info->block != NULL)
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kfree(info->block);
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if ((info->flags & RHIF_STATIC_INFO) == 0)
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kfree(info);
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}
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/*
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* Initialize in place a remote heap info block. This is needed to support
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* operation very early in the startup of the kernel, when it is not yet safe
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* to call kmalloc.
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*/
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void rh_init(rh_info_t * info, unsigned int alignment, int max_blocks,
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rh_block_t * block)
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{
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int i;
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rh_block_t *blk;
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/* Alignment must be a power of two */
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if ((alignment & (alignment - 1)) != 0)
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return;
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info->alignment = alignment;
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/* Initially everything as empty */
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info->block = block;
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info->max_blocks = max_blocks;
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info->empty_slots = max_blocks;
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info->flags = RHIF_STATIC_INFO | RHIF_STATIC_BLOCK;
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INIT_LIST_HEAD(&info->empty_list);
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INIT_LIST_HEAD(&info->free_list);
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INIT_LIST_HEAD(&info->taken_list);
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/* Add all new blocks to the free list */
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for (i = 0, blk = block; i < max_blocks; i++, blk++)
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list_add(&blk->list, &info->empty_list);
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}
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/* Attach a free memory region, coalesces regions if adjuscent */
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int rh_attach_region(rh_info_t * info, unsigned long start, int size)
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{
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rh_block_t *blk;
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unsigned long s, e, m;
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int r;
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/* The region must be aligned */
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s = start;
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e = s + size;
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m = info->alignment - 1;
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/* Round start up */
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s = (s + m) & ~m;
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/* Round end down */
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e = e & ~m;
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if (IS_ERR_VALUE(e) || (e < s))
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return -ERANGE;
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/* Take final values */
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start = s;
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size = e - s;
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/* Grow the blocks, if needed */
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r = assure_empty(info, 1);
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if (r < 0)
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return r;
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blk = get_slot(info);
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blk->start = start;
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blk->size = size;
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blk->owner = NULL;
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attach_free_block(info, blk);
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return 0;
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}
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/* Detatch given address range, splits free block if needed. */
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unsigned long rh_detach_region(rh_info_t * info, unsigned long start, int size)
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{
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struct list_head *l;
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rh_block_t *blk, *newblk;
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unsigned long s, e, m, bs, be;
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/* Validate size */
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if (size <= 0)
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return (unsigned long) -EINVAL;
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/* The region must be aligned */
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s = start;
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e = s + size;
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m = info->alignment - 1;
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/* Round start up */
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s = (s + m) & ~m;
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/* Round end down */
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e = e & ~m;
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if (assure_empty(info, 1) < 0)
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return (unsigned long) -ENOMEM;
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blk = NULL;
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list_for_each(l, &info->free_list) {
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blk = list_entry(l, rh_block_t, list);
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/* The range must lie entirely inside one free block */
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bs = blk->start;
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be = blk->start + blk->size;
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if (s >= bs && e <= be)
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break;
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blk = NULL;
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}
|
|
||||||
|
|
||||||
if (blk == NULL)
|
|
||||||
return (unsigned long) -ENOMEM;
|
|
||||||
|
|
||||||
/* Perfect fit */
|
|
||||||
if (bs == s && be == e) {
|
|
||||||
/* Delete from free list, release slot */
|
|
||||||
list_del(&blk->list);
|
|
||||||
release_slot(info, blk);
|
|
||||||
return s;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* blk still in free list, with updated start and/or size */
|
|
||||||
if (bs == s || be == e) {
|
|
||||||
if (bs == s)
|
|
||||||
blk->start += size;
|
|
||||||
blk->size -= size;
|
|
||||||
|
|
||||||
} else {
|
|
||||||
/* The front free fragment */
|
|
||||||
blk->size = s - bs;
|
|
||||||
|
|
||||||
/* the back free fragment */
|
|
||||||
newblk = get_slot(info);
|
|
||||||
newblk->start = e;
|
|
||||||
newblk->size = be - e;
|
|
||||||
|
|
||||||
list_add(&newblk->list, &blk->list);
|
|
||||||
}
|
|
||||||
|
|
||||||
return s;
|
|
||||||
}
|
|
||||||
|
|
||||||
unsigned long rh_alloc(rh_info_t * info, int size, const char *owner)
|
|
||||||
{
|
|
||||||
struct list_head *l;
|
|
||||||
rh_block_t *blk;
|
|
||||||
rh_block_t *newblk;
|
|
||||||
unsigned long start;
|
|
||||||
|
|
||||||
/* Validate size */
|
|
||||||
if (size <= 0)
|
|
||||||
return (unsigned long) -EINVAL;
|
|
||||||
|
|
||||||
/* Align to configured alignment */
|
|
||||||
size = (size + (info->alignment - 1)) & ~(info->alignment - 1);
|
|
||||||
|
|
||||||
if (assure_empty(info, 1) < 0)
|
|
||||||
return (unsigned long) -ENOMEM;
|
|
||||||
|
|
||||||
blk = NULL;
|
|
||||||
list_for_each(l, &info->free_list) {
|
|
||||||
blk = list_entry(l, rh_block_t, list);
|
|
||||||
if (size <= blk->size)
|
|
||||||
break;
|
|
||||||
blk = NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (blk == NULL)
|
|
||||||
return (unsigned long) -ENOMEM;
|
|
||||||
|
|
||||||
/* Just fits */
|
|
||||||
if (blk->size == size) {
|
|
||||||
/* Move from free list to taken list */
|
|
||||||
list_del(&blk->list);
|
|
||||||
blk->owner = owner;
|
|
||||||
start = blk->start;
|
|
||||||
|
|
||||||
attach_taken_block(info, blk);
|
|
||||||
|
|
||||||
return start;
|
|
||||||
}
|
|
||||||
|
|
||||||
newblk = get_slot(info);
|
|
||||||
newblk->start = blk->start;
|
|
||||||
newblk->size = size;
|
|
||||||
newblk->owner = owner;
|
|
||||||
|
|
||||||
/* blk still in free list, with updated start, size */
|
|
||||||
blk->start += size;
|
|
||||||
blk->size -= size;
|
|
||||||
|
|
||||||
start = newblk->start;
|
|
||||||
|
|
||||||
attach_taken_block(info, newblk);
|
|
||||||
|
|
||||||
return start;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* allocate at precisely the given address */
|
|
||||||
unsigned long rh_alloc_fixed(rh_info_t * info, unsigned long start, int size, const char *owner)
|
|
||||||
{
|
|
||||||
struct list_head *l;
|
|
||||||
rh_block_t *blk, *newblk1, *newblk2;
|
|
||||||
unsigned long s, e, m, bs=0, be=0;
|
|
||||||
|
|
||||||
/* Validate size */
|
|
||||||
if (size <= 0)
|
|
||||||
return (unsigned long) -EINVAL;
|
|
||||||
|
|
||||||
/* The region must be aligned */
|
|
||||||
s = start;
|
|
||||||
e = s + size;
|
|
||||||
m = info->alignment - 1;
|
|
||||||
|
|
||||||
/* Round start up */
|
|
||||||
s = (s + m) & ~m;
|
|
||||||
|
|
||||||
/* Round end down */
|
|
||||||
e = e & ~m;
|
|
||||||
|
|
||||||
if (assure_empty(info, 2) < 0)
|
|
||||||
return (unsigned long) -ENOMEM;
|
|
||||||
|
|
||||||
blk = NULL;
|
|
||||||
list_for_each(l, &info->free_list) {
|
|
||||||
blk = list_entry(l, rh_block_t, list);
|
|
||||||
/* The range must lie entirely inside one free block */
|
|
||||||
bs = blk->start;
|
|
||||||
be = blk->start + blk->size;
|
|
||||||
if (s >= bs && e <= be)
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (blk == NULL)
|
|
||||||
return (unsigned long) -ENOMEM;
|
|
||||||
|
|
||||||
/* Perfect fit */
|
|
||||||
if (bs == s && be == e) {
|
|
||||||
/* Move from free list to taken list */
|
|
||||||
list_del(&blk->list);
|
|
||||||
blk->owner = owner;
|
|
||||||
|
|
||||||
start = blk->start;
|
|
||||||
attach_taken_block(info, blk);
|
|
||||||
|
|
||||||
return start;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
/* blk still in free list, with updated start and/or size */
|
|
||||||
if (bs == s || be == e) {
|
|
||||||
if (bs == s)
|
|
||||||
blk->start += size;
|
|
||||||
blk->size -= size;
|
|
||||||
|
|
||||||
} else {
|
|
||||||
/* The front free fragment */
|
|
||||||
blk->size = s - bs;
|
|
||||||
|
|
||||||
/* The back free fragment */
|
|
||||||
newblk2 = get_slot(info);
|
|
||||||
newblk2->start = e;
|
|
||||||
newblk2->size = be - e;
|
|
||||||
|
|
||||||
list_add(&newblk2->list, &blk->list);
|
|
||||||
}
|
|
||||||
|
|
||||||
newblk1 = get_slot(info);
|
|
||||||
newblk1->start = s;
|
|
||||||
newblk1->size = e - s;
|
|
||||||
newblk1->owner = owner;
|
|
||||||
|
|
||||||
start = newblk1->start;
|
|
||||||
attach_taken_block(info, newblk1);
|
|
||||||
|
|
||||||
return start;
|
|
||||||
}
|
|
||||||
|
|
||||||
int rh_free(rh_info_t * info, unsigned long start)
|
|
||||||
{
|
|
||||||
rh_block_t *blk, *blk2;
|
|
||||||
struct list_head *l;
|
|
||||||
int size;
|
|
||||||
|
|
||||||
/* Linear search for block */
|
|
||||||
blk = NULL;
|
|
||||||
list_for_each(l, &info->taken_list) {
|
|
||||||
blk2 = list_entry(l, rh_block_t, list);
|
|
||||||
if (start < blk2->start)
|
|
||||||
break;
|
|
||||||
blk = blk2;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (blk == NULL || start > (blk->start + blk->size))
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
/* Remove from taken list */
|
|
||||||
list_del(&blk->list);
|
|
||||||
|
|
||||||
/* Get size of freed block */
|
|
||||||
size = blk->size;
|
|
||||||
attach_free_block(info, blk);
|
|
||||||
|
|
||||||
return size;
|
|
||||||
}
|
|
||||||
|
|
||||||
int rh_get_stats(rh_info_t * info, int what, int max_stats, rh_stats_t * stats)
|
|
||||||
{
|
|
||||||
rh_block_t *blk;
|
|
||||||
struct list_head *l;
|
|
||||||
struct list_head *h;
|
|
||||||
int nr;
|
|
||||||
|
|
||||||
switch (what) {
|
|
||||||
|
|
||||||
case RHGS_FREE:
|
|
||||||
h = &info->free_list;
|
|
||||||
break;
|
|
||||||
|
|
||||||
case RHGS_TAKEN:
|
|
||||||
h = &info->taken_list;
|
|
||||||
break;
|
|
||||||
|
|
||||||
default:
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Linear search for block */
|
|
||||||
nr = 0;
|
|
||||||
list_for_each(l, h) {
|
|
||||||
blk = list_entry(l, rh_block_t, list);
|
|
||||||
if (stats != NULL && nr < max_stats) {
|
|
||||||
stats->start = blk->start;
|
|
||||||
stats->size = blk->size;
|
|
||||||
stats->owner = blk->owner;
|
|
||||||
stats++;
|
|
||||||
}
|
|
||||||
nr++;
|
|
||||||
}
|
|
||||||
|
|
||||||
return nr;
|
|
||||||
}
|
|
||||||
|
|
||||||
int rh_set_owner(rh_info_t * info, unsigned long start, const char *owner)
|
|
||||||
{
|
|
||||||
rh_block_t *blk, *blk2;
|
|
||||||
struct list_head *l;
|
|
||||||
int size;
|
|
||||||
|
|
||||||
/* Linear search for block */
|
|
||||||
blk = NULL;
|
|
||||||
list_for_each(l, &info->taken_list) {
|
|
||||||
blk2 = list_entry(l, rh_block_t, list);
|
|
||||||
if (start < blk2->start)
|
|
||||||
break;
|
|
||||||
blk = blk2;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (blk == NULL || start > (blk->start + blk->size))
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
blk->owner = owner;
|
|
||||||
size = blk->size;
|
|
||||||
|
|
||||||
return size;
|
|
||||||
}
|
|
||||||
|
|
||||||
void rh_dump(rh_info_t * info)
|
|
||||||
{
|
|
||||||
static rh_stats_t st[32]; /* XXX maximum 32 blocks */
|
|
||||||
int maxnr;
|
|
||||||
int i, nr;
|
|
||||||
|
|
||||||
maxnr = ARRAY_SIZE(st);
|
|
||||||
|
|
||||||
printk(KERN_INFO
|
|
||||||
"info @0x%p (%d slots empty / %d max)\n",
|
|
||||||
info, info->empty_slots, info->max_blocks);
|
|
||||||
|
|
||||||
printk(KERN_INFO " Free:\n");
|
|
||||||
nr = rh_get_stats(info, RHGS_FREE, maxnr, st);
|
|
||||||
if (nr > maxnr)
|
|
||||||
nr = maxnr;
|
|
||||||
for (i = 0; i < nr; i++)
|
|
||||||
printk(KERN_INFO
|
|
||||||
" 0x%lx-0x%lx (%u)\n",
|
|
||||||
st[i].start, st[i].start + st[i].size,
|
|
||||||
st[i].size);
|
|
||||||
printk(KERN_INFO "\n");
|
|
||||||
|
|
||||||
printk(KERN_INFO " Taken:\n");
|
|
||||||
nr = rh_get_stats(info, RHGS_TAKEN, maxnr, st);
|
|
||||||
if (nr > maxnr)
|
|
||||||
nr = maxnr;
|
|
||||||
for (i = 0; i < nr; i++)
|
|
||||||
printk(KERN_INFO
|
|
||||||
" 0x%lx-0x%lx (%u) %s\n",
|
|
||||||
st[i].start, st[i].start + st[i].size,
|
|
||||||
st[i].size, st[i].owner != NULL ? st[i].owner : "");
|
|
||||||
printk(KERN_INFO "\n");
|
|
||||||
}
|
|
||||||
|
|
||||||
void rh_dump_blk(rh_info_t * info, rh_block_t * blk)
|
|
||||||
{
|
|
||||||
printk(KERN_INFO
|
|
||||||
"blk @0x%p: 0x%lx-0x%lx (%u)\n",
|
|
||||||
blk, blk->start, blk->start + blk->size, blk->size);
|
|
||||||
}
|
|
Loading…
Reference in a new issue