Bochs/bochs/memory/memory.h
Volker Ruppert 1f18f5831f - final fix for busmaster DMA transfers from device to memory: new memory method
writePhysicalBlock() replaces the buggy code in iodev.h.
  Calling pageWriteStampTable.decWriteStamp(addr) is required here to make memcpy() work.
2011-11-30 17:11:43 +00:00

172 lines
6.3 KiB
C++

/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001-2009 The Bochs Project
//
// I/O memory handlers API Copyright (C) 2003 by Frank Cornelis
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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 GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#ifndef BX_MEM_H
# define BX_MEM_H 1
#if BX_USE_MEM_SMF
// if static member functions on, then there is only one memory
# define BX_MEM_SMF static
# define BX_MEM_THIS BX_MEM(0)->
#else
# define BX_MEM_SMF
# define BX_MEM_THIS this->
#endif
class BX_CPU_C;
// 512K BIOS ROM @0xfff80000
#define BIOSROMSZ ((Bit32u)(1 << 21)) // 2M BIOS ROM @0xffe00000, must be a power of 2
#define EXROMSIZE (0x20000) // ROMs 0xc0000-0xdffff (area 0xe0000-0xfffff=bios mapped)
#define BIOS_MASK (BIOSROMSZ-1)
#define EXROM_MASK (EXROMSIZE-1)
#define BIOS_MAP_LAST128K(addr) (((addr) | 0xfff00000) & BIOS_MASK)
typedef bx_bool (*memory_handler_t)(bx_phy_address addr, unsigned len, void *data, void *param);
// return a pointer to 4K region containing <addr> or NULL if direct access is not allowed
// same format as getHostMemAddr method
typedef Bit8u* (*memory_direct_access_handler_t)(bx_phy_address addr, unsigned rw, void *param);
struct memory_handler_struct {
struct memory_handler_struct *next;
void *param;
bx_phy_address begin;
bx_phy_address end;
memory_handler_t read_handler;
memory_handler_t write_handler;
memory_direct_access_handler_t da_handler;
};
#define SMRAM_CODE 1
#define SMRAM_DATA 2
class BOCHSAPI BX_MEM_C : public logfunctions {
private:
struct memory_handler_struct **memory_handlers;
bx_bool pci_enabled;
bx_bool smram_available;
bx_bool smram_enable;
bx_bool smram_restricted;
Bit64u len, allocated; // could be > 4G
Bit8u *actual_vector;
Bit8u *vector; // aligned correctly
Bit8u **blocks;
Bit8u *rom; // 512k BIOS rom space + 128k expansion rom space
Bit8u *bogus; // 4k for unexisting memory
bx_bool rom_present[65];
Bit32u used_blocks;
#if BX_LARGE_RAMFILE
static Bit8u * const swapped_out; // NULL; // (NULL - sizeof(Bit8u));
Bit32u next_swapout_idx;
FILE *overflow_file;
BX_MEM_SMF void read_block(Bit32u block);
#endif
public:
BX_MEM_C();
~BX_MEM_C();
BX_MEM_SMF Bit8u* get_vector(bx_phy_address addr);
BX_MEM_SMF void init_memory(Bit64u guest, Bit64u host);
BX_MEM_SMF void cleanup_memory(void);
BX_MEM_SMF void enable_smram(bx_bool enable, bx_bool restricted);
BX_MEM_SMF void disable_smram(void);
BX_MEM_SMF bx_bool is_smram_accessible(void);
BX_MEM_SMF void readPhysicalPage(BX_CPU_C *cpu, bx_phy_address addr,
unsigned len, void *data);
BX_MEM_SMF void writePhysicalPage(BX_CPU_C *cpu, bx_phy_address addr,
unsigned len, void *data);
BX_MEM_SMF void writePhysicalBlock(bx_phy_address addr, unsigned len, void *data);
BX_MEM_SMF void load_ROM(const char *path, bx_phy_address romaddress, Bit8u type);
BX_MEM_SMF void load_RAM(const char *path, bx_phy_address romaddress, Bit8u type);
#if (BX_DEBUGGER || BX_DISASM || BX_GDBSTUB)
BX_MEM_SMF bx_bool dbg_fetch_mem(BX_CPU_C *cpu, bx_phy_address addr, unsigned len, Bit8u *buf);
#endif
#if (BX_DEBUGGER || BX_GDBSTUB)
BX_MEM_SMF bx_bool dbg_set_mem(bx_phy_address addr, unsigned len, Bit8u *buf);
BX_MEM_SMF bx_bool dbg_crc32(bx_phy_address addr1, bx_phy_address addr2, Bit32u *crc);
#endif
BX_MEM_SMF Bit8u* getHostMemAddr(BX_CPU_C *cpu, bx_phy_address addr, unsigned rw);
BX_MEM_SMF bx_bool registerMemoryHandlers(void *param, memory_handler_t read_handler,
memory_handler_t write_handler, memory_direct_access_handler_t da_handler,
bx_phy_address begin_addr, bx_phy_address end_addr);
BX_MEM_SMF BX_CPP_INLINE bx_bool registerMemoryHandlers(void *param, memory_handler_t read_handler,
memory_handler_t write_handler,
bx_phy_address begin_addr, bx_phy_address end_addr)
{
return registerMemoryHandlers(param, read_handler, write_handler, NULL, begin_addr, end_addr);
}
BX_MEM_SMF bx_bool unregisterMemoryHandlers(void *param, bx_phy_address begin_addr, bx_phy_address end_addr);
BX_MEM_SMF Bit64u get_memory_len(void);
BX_MEM_SMF void allocate_block(Bit32u index);
BX_MEM_SMF Bit8u* alloc_vector_aligned(Bit32u bytes, Bit32u alignment);
#if BX_SUPPORT_MONITOR_MWAIT
BX_MEM_SMF bx_bool is_monitor(bx_phy_address begin_addr, unsigned len);
BX_MEM_SMF void check_monitor(bx_phy_address addr, unsigned len);
#endif
void register_state(void);
friend void ramfile_save_handler(void *devptr, FILE *fp);
friend Bit64s memory_param_save_handler(void *devptr, bx_param_c *param);
friend void memory_param_restore_handler(void *devptr, bx_param_c *param, Bit64s val);
};
BOCHSAPI extern BX_MEM_C bx_mem;
// must be power of two
#define BX_MEM_BLOCK_LEN (1024*1024) /* 1M blocks */
/*
BX_CPP_INLINE Bit8u* BX_MEM_C::get_vector(bx_phy_address addr)
{
return (BX_MEM_THIS vector + addr);
}
*/
BX_CPP_INLINE Bit8u* BX_MEM_C::get_vector(bx_phy_address addr)
{
Bit32u block = (Bit32u)(addr / BX_MEM_BLOCK_LEN);
#if (BX_LARGE_RAMFILE)
if (!BX_MEM_THIS blocks[block] || (BX_MEM_THIS blocks[block] == BX_MEM_THIS swapped_out))
#else
if (!BX_MEM_THIS blocks[block])
#endif
allocate_block(block);
return BX_MEM_THIS blocks[block] + (Bit32u)(addr & (BX_MEM_BLOCK_LEN-1));
}
BX_CPP_INLINE Bit64u BX_MEM_C::get_memory_len(void)
{
return (BX_MEM_THIS len);
}
#endif