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Diffstat (limited to 'cfe/cfe/pccons/x86mem.h')
| -rw-r--r-- | cfe/cfe/pccons/x86mem.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/cfe/cfe/pccons/x86mem.h b/cfe/cfe/pccons/x86mem.h new file mode 100644 index 0000000..ed9132b --- /dev/null +++ b/cfe/cfe/pccons/x86mem.h @@ -0,0 +1,109 @@ +/* ********************************************************************* + * 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)); + |