204 lines
7.0 KiB
C++
204 lines
7.0 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001-2009 The Bochs Project
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//
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// I/O memory handlers API Copyright (C) 2003 by Frank Cornelis
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#ifndef BX_MEM_H
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# define BX_MEM_H 1
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#if BX_USE_MEM_SMF
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// if static member functions on, then there is only one memory
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# define BX_MEM_SMF static
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# define BX_MEM_THIS BX_MEM(0)->
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#else
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# define BX_MEM_SMF
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# define BX_MEM_THIS this->
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#endif
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class BX_CPU_C;
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// 512K BIOS ROM @0xfff80000
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#define BIOSROMSZ ((Bit32u)(1 << 21)) // 2M BIOS ROM @0xffe00000, must be a power of 2
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#define EXROMSIZE (0x20000) // ROMs 0xc0000-0xdffff (area 0xe0000-0xfffff=bios mapped)
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#define BIOS_MASK (BIOSROMSZ-1)
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#define EXROM_MASK (EXROMSIZE-1)
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#define BIOS_MAP_LAST128K(addr) (((addr) | 0xfff00000) & BIOS_MASK)
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enum memory_area_t {
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BX_MEM_AREA_C0000 = 0,
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BX_MEM_AREA_C4000,
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BX_MEM_AREA_C8000,
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BX_MEM_AREA_CC000,
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BX_MEM_AREA_D0000,
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BX_MEM_AREA_D4000,
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BX_MEM_AREA_D8000,
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BX_MEM_AREA_DC000,
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BX_MEM_AREA_E0000,
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BX_MEM_AREA_E4000,
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BX_MEM_AREA_E8000,
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BX_MEM_AREA_EC000,
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BX_MEM_AREA_F0000
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};
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typedef bx_bool (*memory_handler_t)(bx_phy_address addr, unsigned len, void *data, void *param);
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// return a pointer to 4K region containing <addr> or NULL if direct access is not allowed
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// same format as getHostMemAddr method
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typedef Bit8u* (*memory_direct_access_handler_t)(bx_phy_address addr, unsigned rw, void *param);
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struct memory_handler_struct {
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struct memory_handler_struct *next;
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void *param;
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bx_phy_address begin;
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bx_phy_address end;
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Bit16u bitmap;
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memory_handler_t read_handler;
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memory_handler_t write_handler;
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memory_direct_access_handler_t da_handler;
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};
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#define SMRAM_CODE 1
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#define SMRAM_DATA 2
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class BOCHSAPI BX_MEM_C : public logfunctions {
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private:
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struct memory_handler_struct **memory_handlers;
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bx_bool pci_enabled;
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bx_bool bios_write_enabled;
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bx_bool smram_available;
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bx_bool smram_enable;
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bx_bool smram_restricted;
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Bit64u len, allocated; // could be > 4G
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Bit8u *actual_vector;
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Bit8u *vector; // aligned correctly
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Bit8u **blocks;
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Bit8u *rom; // 512k BIOS rom space + 128k expansion rom space
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Bit8u *bogus; // 4k for unexisting memory
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bx_bool rom_present[65];
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bx_bool memory_type[13][2];
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Bit32u used_blocks;
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#if BX_LARGE_RAMFILE
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static Bit8u * const swapped_out; // NULL; // (NULL - sizeof(Bit8u));
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Bit32u next_swapout_idx;
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FILE *overflow_file;
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BX_MEM_SMF void read_block(Bit32u block);
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#endif
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public:
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BX_MEM_C();
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~BX_MEM_C();
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BX_MEM_SMF Bit8u* get_vector(bx_phy_address addr);
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BX_MEM_SMF void init_memory(Bit64u guest, Bit64u host);
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BX_MEM_SMF void cleanup_memory(void);
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BX_MEM_SMF void enable_smram(bx_bool enable, bx_bool restricted);
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BX_MEM_SMF void disable_smram(void);
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BX_MEM_SMF bx_bool is_smram_accessible(void);
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BX_MEM_SMF void set_bios_write(bx_bool enabled);
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BX_MEM_SMF void set_memory_type(memory_area_t area, bx_bool rw, bx_bool dram);
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BX_MEM_SMF Bit8u* getHostMemAddr(BX_CPU_C *cpu, bx_phy_address addr, unsigned rw);
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// Note: accesses should always be contained within a single page
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BX_MEM_SMF void readPhysicalPage(BX_CPU_C *cpu, bx_phy_address addr,
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unsigned len, void *data);
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BX_MEM_SMF void writePhysicalPage(BX_CPU_C *cpu, bx_phy_address addr,
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unsigned len, void *data);
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BX_MEM_SMF void dmaReadPhysicalPage(bx_phy_address addr, unsigned len, Bit8u *data);
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BX_MEM_SMF void dmaWritePhysicalPage(bx_phy_address addr, unsigned len, Bit8u *data);
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BX_MEM_SMF void load_ROM(const char *path, bx_phy_address romaddress, Bit8u type);
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BX_MEM_SMF void load_RAM(const char *path, bx_phy_address romaddress, Bit8u type);
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#if (BX_DEBUGGER || BX_DISASM || BX_GDBSTUB)
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BX_MEM_SMF bx_bool dbg_fetch_mem(BX_CPU_C *cpu, bx_phy_address addr, unsigned len, Bit8u *buf);
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#endif
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#if (BX_DEBUGGER || BX_GDBSTUB)
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BX_MEM_SMF bx_bool dbg_set_mem(bx_phy_address addr, unsigned len, Bit8u *buf);
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BX_MEM_SMF bx_bool dbg_crc32(bx_phy_address addr1, bx_phy_address addr2, Bit32u *crc);
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#endif
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BX_MEM_SMF bx_bool registerMemoryHandlers(void *param, memory_handler_t read_handler,
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memory_handler_t write_handler, memory_direct_access_handler_t da_handler,
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bx_phy_address begin_addr, bx_phy_address end_addr);
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BX_MEM_SMF BX_CPP_INLINE bx_bool registerMemoryHandlers(void *param, memory_handler_t read_handler,
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memory_handler_t write_handler,
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bx_phy_address begin_addr, bx_phy_address end_addr)
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{
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return registerMemoryHandlers(param, read_handler, write_handler, NULL, begin_addr, end_addr);
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}
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BX_MEM_SMF bx_bool unregisterMemoryHandlers(void *param, bx_phy_address begin_addr, bx_phy_address end_addr);
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BX_MEM_SMF Bit64u get_memory_len(void);
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BX_MEM_SMF void allocate_block(Bit32u index);
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BX_MEM_SMF Bit8u* alloc_vector_aligned(Bit32u bytes, Bit32u alignment);
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#if BX_SUPPORT_MONITOR_MWAIT
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BX_MEM_SMF bx_bool is_monitor(bx_phy_address begin_addr, unsigned len);
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BX_MEM_SMF void check_monitor(bx_phy_address addr, unsigned len);
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#endif
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void register_state(void);
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friend void ramfile_save_handler(void *devptr, FILE *fp);
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friend Bit64s memory_param_save_handler(void *devptr, bx_param_c *param);
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friend void memory_param_restore_handler(void *devptr, bx_param_c *param, Bit64s val);
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};
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BOCHSAPI extern BX_MEM_C bx_mem;
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// must be power of two
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#define BX_MEM_BLOCK_LEN (1024*1024) /* 1M blocks */
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/*
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BX_CPP_INLINE Bit8u* BX_MEM_C::get_vector(bx_phy_address addr)
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{
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return (BX_MEM_THIS vector + addr);
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}
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*/
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BX_CPP_INLINE Bit8u* BX_MEM_C::get_vector(bx_phy_address addr)
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{
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Bit32u block = (Bit32u)(addr / BX_MEM_BLOCK_LEN);
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#if (BX_LARGE_RAMFILE)
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if (!BX_MEM_THIS blocks[block] || (BX_MEM_THIS blocks[block] == BX_MEM_THIS swapped_out))
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#else
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if (!BX_MEM_THIS blocks[block])
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#endif
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allocate_block(block);
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return BX_MEM_THIS blocks[block] + (Bit32u)(addr & (BX_MEM_BLOCK_LEN-1));
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}
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BX_CPP_INLINE Bit64u BX_MEM_C::get_memory_len(void)
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{
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return (BX_MEM_THIS len);
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}
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#endif
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