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/*
* Copyright (c) 1996-1999 The University of Utah and the Flux Group.
*
* This file is part of the OSKit Linux Glue Libraries, which are free
* software, also known as "open source;" you can redistribute them and/or
* modify them under the terms of the GNU General Public License (GPL),
* version 2, as published by the Free Software Foundation (FSF).
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Linux kernel memory allocation.
*/
#ifndef OSKIT
#define OSKIT
#endif
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/delay.h>
#include "shared.h"
#include "osenv.h"
/* XXX are all these flags really necessary? */
#define KMALLOC_FLAGS (OSENV_AUTO_SIZE | OSENV_PHYS_WIRED | \
OSENV_VIRT_EQ_PHYS | OSENV_PHYS_CONTIG)
/*
* Invoke the OS's memory allocation services,
* saving the current pointer around the possibly-blocking call.
*/
void *
oskit_linux_mem_alloc(oskit_size_t size, osenv_memflags_t flags, unsigned align)
{
struct task_struct *cur = current;
void *mem;
mem = osenv_mem_alloc(size, flags, align);
current = cur;
return mem;
}
void
oskit_linux_mem_free(void *block, osenv_memflags_t flags, oskit_size_t size)
{
struct task_struct *cur = current;
osenv_mem_free(block, flags, size);
current = cur;
}
/*
* Allocate wired down kernel memory.
*/
void *
kmalloc(unsigned int size, int priority)
{
int flags;
void *p;
flags = KMALLOC_FLAGS;
if (priority & GFP_ATOMIC)
flags |= OSENV_NONBLOCKING;
if (priority & GFP_DMA)
flags |= OSENV_ISADMA_MEM;
p = oskit_linux_mem_alloc(size, flags, 0);
return (p);
}
/*
* Free kernel memory.
* XXX this should probably pass the same flags as kmalloc. It doesn't matter
* right now since osenv_mem_free only listens to OSENV_AUTO_FLAGS.
*/
void
kfree(const void *p)
{
oskit_linux_mem_free((void *) p, KMALLOC_FLAGS, 0);
}
/*
* Allocate physically contiguous pages.
*/
unsigned long
__get_free_pages(int priority, unsigned long order)
{
int flags;
void *p;
flags = OSENV_PHYS_WIRED|OSENV_VIRT_EQ_PHYS|OSENV_PHYS_CONTIG;
if (priority & GFP_ATOMIC)
flags |= OSENV_NONBLOCKING;
if (priority & GFP_DMA)
flags |= OSENV_ISADMA_MEM;
p = oskit_linux_mem_alloc(PAGE_SIZE << order, flags, PAGE_SIZE);
return ((unsigned long)p);
}
/*
* Free pages.
*/
void
free_pages(unsigned long addr, unsigned long order)
{
oskit_linux_mem_free((void *)addr,
OSENV_PHYS_WIRED|OSENV_VIRT_EQ_PHYS|OSENV_PHYS_CONTIG,
PAGE_SIZE << order);
}
/*
* Allocate virtually contiguous memory.
* The underlying physical pages do not need to be contiguous.
*/
void *
vmalloc(unsigned long size)
{
return oskit_linux_mem_alloc(size,
OSENV_AUTO_SIZE|OSENV_PHYS_WIRED,
0);
}
void
vfree(void *addr)
{
oskit_linux_mem_free(addr, OSENV_AUTO_SIZE|OSENV_PHYS_WIRED, 0);
}
/*
* Slab stuff. No caching, just fake it best we can.
*/
struct slab_stuff {
char *name;
int size;
};
kmem_cache_t *
kmem_cache_create(const char *name, size_t size, size_t offset,
unsigned long flags,
void (*ctor)(void*, kmem_cache_t *, unsigned long),
void (*dtor)(void*, kmem_cache_t *, unsigned long))
{
struct slab_stuff *stuffp;
if (ctor || dtor || offset)
osenv_panic("kmem_cache_create: Cannot handle ctor or dtor");
stuffp = kmalloc(sizeof(struct slab_stuff) + strlen(name) + 1, 0);
if (!stuffp)
osenv_panic("kmem_cache_create: No memory left");
stuffp->name = (char *) (stuffp + 1);
stuffp->size = size;
memcpy(stuffp->name, name, strlen(name));
/* printk("kmem_cache_create: %s %d %p\n", name, size, stuffp); */
return (kmem_cache_t *) stuffp;
}
void *
kmem_cache_alloc(kmem_cache_t *cachep, int flags)
{
struct slab_stuff *stuffp = (struct slab_stuff *) cachep;
void *obj;
obj = kmalloc(stuffp->size, flags);
/* printk("kmem_cache_alloc: %s %d %p\n",
stuffp->name, stuffp->size, obj); */
return obj;
}
void
kmem_cache_free(kmem_cache_t *cachep, void *objp)
{
#if 0
struct slab_stuff *stuffp = (struct slab_stuff *) cachep;
/* printk("kmem_cache_free: %s %d %p\n",
stuffp->name, stuffp->size, objp); */
#endif
kfree(objp);
}
void
kfree_s(const void *objp, size_t size)
{
/* printk("kfree_s: %d %p\n", size, objp); */
kfree(objp);
}
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