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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* X86 simulator sparse memory File: X86MEM.H
*
* This module implements X86 memory for the X86 emulator
* used by the BIOS simulator. To avoid allocating the
* entire 1MB of PC's addressable memory, this is a "sparse"
* memory model, allocating chunks of storage as needed.
* VGA BIOSes seem to do all sorts of bizarre things to memory
* so this helps reduce the total amount we need to allocate
* significantly.
*
* In addition, this module lets the simulator "hook"
* ranges of memory to be handled by a callback
* routine. This is used so that we can redirect
* accesses to VGA memory space to the PCI bus handler.
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
/* *********************************************************************
* Constants
********************************************************************* */
#define X86MEM_CHUNKBITS 15
#define X86MEM_ADDRESSBITS 20
#define X86MEM_CHUNKSIZE (1<<X86MEM_CHUNKBITS)
#define X86MEM_CHUNKS (1<<(X86MEM_ADDRESSBITS-X86MEM_CHUNKBITS))
#define X86MEM_REGION(addr) (((addr) >> X86MEM_CHUNKBITS) & (X86MEM_CHUNKS-1))
#define X86MEM_OFFSET(addr) ((addr) & (X86MEM_CHUNKSIZE-1))
#define M_BYTE 1
#define M_WORD 2
#define M_DWORD 4
/* *********************************************************************
* Structures
********************************************************************* */
typedef struct x86mem_s {
uint8_t *data[X86MEM_CHUNKS];
uint32_t (*read[X86MEM_CHUNKS])(struct x86mem_s *x86mem,
uint32_t addr,int size);
void (*write[X86MEM_CHUNKS])(struct x86mem_s *x86mem,
uint32_t addr,uint32_t val,int size);
} x86mem_t;
/* *********************************************************************
* Prototypes
********************************************************************* */
void x86mem_init(x86mem_t *mem);
void x86mem_uninit(x86mem_t *mem);
uint8_t x86mem_readb(x86mem_t *mem,uint32_t addr);
uint16_t x86mem_readw(x86mem_t *mem,uint32_t addr);
uint32_t x86mem_readl(x86mem_t *mem,uint32_t addr);
void x86mem_writeb(x86mem_t *mem,uint32_t addr,uint8_t data);
void x86mem_writew(x86mem_t *mem,uint32_t addr,uint16_t data);
void x86mem_writel(x86mem_t *mem,uint32_t addr,uint32_t data);
void x86mem_memcpy(x86mem_t *mem,uint32_t destaddr,uint8_t *src,int count);
void x86mem_hook(x86mem_t *mem,uint32_t chunkaddr,
uint32_t (*readf)(x86mem_t *mem,uint32_t addr,int size),
void (*writef)(x86mem_t *mem,uint32_t addr,uint32_t val,int size));
void x86mem_hook_range(x86mem_t *mem,uint32_t chunkaddr,int size,
uint32_t (*readf)(x86mem_t *mem,uint32_t addr,int size),
void (*writef)(x86mem_t *mem,uint32_t addr,uint32_t val,int size));
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