174 lines
6.0 KiB
C
174 lines
6.0 KiB
C
#ifndef _SYS_LINUX_KMEM_H
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#define _SYS_LINUX_KMEM_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#undef DEBUG_KMEM
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#undef DEBUG_KMEM_UNIMPLEMENTED
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/spinlock.h>
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/*
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* Memory allocation interfaces
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*/
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#define KM_SLEEP GFP_KERNEL
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#define KM_NOSLEEP GFP_ATOMIC
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#undef KM_PANIC /* No linux analog */
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#define KM_PUSHPAGE (GFP_KERNEL | GFP_HIGH)
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#define KM_VMFLAGS GFP_LEVEL_MASK
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#define KM_FLAGS __GFP_BITS_MASK
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#ifdef DEBUG_KMEM
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/* Shim layer memory accounting */
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extern atomic_t kmem_alloc_used;
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extern unsigned int kmem_alloc_max;
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#endif
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#ifdef DEBUG_KMEM
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#define __kmem_alloc(size, flags, allocator) \
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({ void *_ptr_; \
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\
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/* Marked unlikely because we should never be doing this */ \
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if (unlikely((size) > (PAGE_SIZE * 2))) \
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printk("Warning: kmem_alloc(%d, 0x%x) large alloc at %s:%d " \
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"(%d/%d)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic_read(&kmem_alloc_used), kmem_alloc_max); \
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\
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_ptr_ = (void *)allocator((size), (flags)); \
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if (_ptr_ == NULL) { \
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printk("Warning: kmem_alloc(%d, 0x%x) failed at %s:%d " \
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"(%d/%d)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic_read(&kmem_alloc_used), kmem_alloc_max); \
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atomic_add((size), &kmem_alloc_used); \
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if (unlikely(atomic_read(&kmem_alloc_used) > kmem_alloc_max)) \
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kmem_alloc_max = atomic_read(&kmem_alloc_used); \
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} \
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\
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_ptr_; \
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})
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#define kmem_alloc(size, flags) __kmem_alloc(size, flags, kmalloc)
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#define kmem_zalloc(size, flags) __kmem_alloc(size, flags, kzalloc)
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#define kmem_free(ptr, size) \
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({ \
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BUG_ON(!ptr); \
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atomic_sub((size), &kmem_alloc_used); \
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memset(ptr, 0x5a, (size)); /* Poison */ \
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kfree(ptr); \
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(ptr) = (void *)0xdeadbeef; \
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})
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#else
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#define kmem_alloc(size, flags) kmalloc(size, flags)
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#define kmem_zalloc(size, flags) kzalloc(size, flags)
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#define kmem_free(ptr, size) kfree(ptr)
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#endif /* DEBUG_KMEM */
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#ifdef DEBUG_KMEM_UNIMPLEMENTED
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static __inline__ void *
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kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags)
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{
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#error "kmem_alloc_tryhard() not implemented"
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}
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#endif /* DEBUG_KMEM_UNIMPLEMENTED */
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/*
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* Slab allocation interfaces
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*/
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#undef KMC_NOTOUCH /* No linux analog */
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#define KMC_NODEBUG 0x00000000 /* Default beahvior */
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#define KMC_NOMAGAZINE /* No linux analog */
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#define KMC_NOHASH /* No linux analog */
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#define KMC_QCACHE /* No linux analog */
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#define KMC_REAP_CHUNK 256
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#define KMC_DEFAULT_SEEKS DEFAULT_SEEKS
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/* Defined by linux slab.h
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* typedef struct kmem_cache_s kmem_cache_t;
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*/
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/* No linux analog
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* extern int kmem_ready;
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* extern pgcnt_t kmem_reapahead;
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*/
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#ifdef DEBUG_KMEM_UNIMPLEMENTED
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static __inline__ void kmem_init(void) {
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#error "kmem_init() not implemented"
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}
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static __inline__ void kmem_thread_init(void) {
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#error "kmem_thread_init() not implemented"
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}
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static __inline__ void kmem_mp_init(void) {
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#error "kmem_mp_init() not implemented"
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}
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static __inline__ void kmem_reap_idspace(void) {
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#error "kmem_reap_idspace() not implemented"
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}
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static __inline__ size_t kmem_avail(void) {
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#error "kmem_avail() not implemented"
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}
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static __inline__ size_t kmem_maxavail(void) {
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#error "kmem_maxavail() not implemented"
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}
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static __inline__ uint64_t kmem_cache_stat(kmem_cache_t *cache) {
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#error "kmem_cache_stat() not implemented"
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}
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#endif /* DEBUG_KMEM_UNIMPLEMENTED */
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/* XXX - Used by arc.c to adjust its memory footprint. We may want
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* to use this hook in the future to adjust behavior based on
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* debug levels. For now it's safe to always return 0.
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*/
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static __inline__ int
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kmem_debugging(void)
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{
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return 0;
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}
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typedef int (*kmem_constructor_t)(void *, void *, int);
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typedef void (*kmem_destructor_t)(void *, void *);
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typedef void (*kmem_reclaim_t)(void *);
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kmem_cache_t *
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__kmem_cache_create(char *name, size_t size, size_t align,
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int (*constructor)(void *, void *, int),
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void (*destructor)(void *, void *),
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void (*reclaim)(void *),
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void *priv, void *vmp, int flags);
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void
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__kmem_cache_destroy(kmem_cache_t *cache);
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#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
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__kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
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#define kmem_cache_destroy(cache) __kmem_cache_destroy(cache)
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#define kmem_cache_alloc(cache, flags) kmem_cache_alloc(cache, flags)
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#define kmem_cache_free(cache, ptr) kmem_cache_free(cache, ptr)
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#define kmem_cache_reap_now(cache) kmem_cache_shrink(cache)
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#define kmem_reap() __kmem_reap()
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_LINUX_KMEM_H */
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