90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
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/*
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* Copyright (c) STMicroelectronics Limited
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* Author: Stuart Menefy <stuart.menefy@st.com>
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*
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* Derived from mm/bigphysarea.c which was:
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* Copyright (c) 1996 by Matt Welsh.
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* Extended by Roger Butenuth (butenuth@uni-paderborn.de), October 1997
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* Extended for linux-2.1.121 till 2.4.0 (June 2000)
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* by Pauline Middelink <middelink@polyware.nl>
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*
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* This is a set of routines which allow you to reserve a large (?)
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* amount of physical memory at boot-time, which can be allocated/deallocated
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* by drivers. This memory is intended to be used for devices such as
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* video framegrabbers which need a lot of physical RAM (above the amount
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* allocated by kmalloc). This is by no means efficient or recommended;
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* to be used only in extreme circumstances.
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*/
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#ifndef __LINUX_BPA2_H
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#define __LINUX_BPA2_H
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#include <linux/types.h>
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/*
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* BPA2 Interface
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*/
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#define BPA2_NORMAL 0x00000001
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struct bpa2_partition_desc {
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const char *name;
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unsigned long start;
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unsigned long size;
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unsigned long flags;
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const char **aka;
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};
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struct bpa2_part;
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void bpa2_init(struct bpa2_partition_desc *partdescs, int nparts);
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struct bpa2_part *bpa2_find_part(const char *name);
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int bpa2_low_part(struct bpa2_part *part);
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#if defined(CONFIG_BPA2_ALLOC_TRACE)
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#define bpa2_alloc_pages(part, count, align, priority) \
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__bpa2_alloc_pages(part, count, align, priority, \
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__FILE__, __LINE__)
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#else
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#define bpa2_alloc_pages(part, count, align, priority) \
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__bpa2_alloc_pages(part, count, align, priority, NULL, 0)
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#endif
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unsigned long __bpa2_alloc_pages(struct bpa2_part *part, int count, int align,
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int priority, const char *trace_file, int trace_line);
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void bpa2_free_pages(struct bpa2_part *part, unsigned long base);
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void bpa2_memory(struct bpa2_part *part, unsigned long *base,
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unsigned long *size);
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/*
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* Backward compatibility interface (bigphysarea)
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*/
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/* Original interface */
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#define bigphysarea_alloc(size) \
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bigphysarea_alloc_pages(PAGE_ALIGN(size) >> PAGE_SHIFT, \
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1, GFP_KERNEL)
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#define bigphysarea_free(addr, size) \
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bigphysarea_free_pages(addr)
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/* New(er) interface */
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#if defined(CONFIG_BPA2_ALLOC_TRACE)
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#define bigphysarea_alloc_pages(count, align, priority) \
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__bigphysarea_alloc_pages(count, align, priority, \
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__FILE__, __LINE__)
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#else
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#define bigphysarea_alloc_pages(count, align, priority) \
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__bigphysarea_alloc_pages(count, align, priority, NULL, 0)
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#endif
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caddr_t __bigphysarea_alloc_pages(int count, int align, int priority,
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const char *trace_file, int trace_line);
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void bigphysarea_free_pages(caddr_t base);
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/* low level interface */
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void bigphysarea_memory(unsigned long *base, unsigned long *size);
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#endif /* __LINUX_BPA2_H */
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