mirror of https://github.com/bochs-emu/Bochs
270 lines
6.9 KiB
C++
270 lines
6.9 KiB
C++
// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include "bochs.h"
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#if BX_PROVIDE_CPU_MEMORY
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Bit32u
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BX_MEM_C::get_memory_in_k(void)
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{
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bx_printf("(%u) get_memory_in_k() = %u\n", BX_SIM_ID, (unsigned)
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(BX_MEM_THIS megabytes * 1024));
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return(BX_MEM_THIS megabytes * 1024);
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if BX_PROVIDE_CPU_MEMORY
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// BX_MEM_C constructor
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BX_MEM_C::BX_MEM_C(void)
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{
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BX_MEM.vector = NULL;
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BX_MEM.len = 0;
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BX_MEM.megabytes = 0;
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if BX_PROVIDE_CPU_MEMORY
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// BX_MEM_C constructor
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BX_MEM_C::BX_MEM_C(size_t memsize)
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{
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bx_printf("(%u) BX_MEM_C::BX_MEM_C(size_t) called\n", BX_SIM_ID);
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bx_printf("(%u) memsize = %u\n", BX_SIM_ID, (unsigned) memsize);
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vector = new Bit8u[memsize];
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len = memsize;
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megabytes = len / (1024*1024);
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if BX_PROVIDE_CPU_MEMORY
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// BX_MEM_C destructor
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BX_MEM_C::~BX_MEM_C(void)
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{
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if (this-> vector != NULL) {
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delete this->vector;
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}
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else {
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bx_printf("(%u) memory not freed as it wasn't allocated!\n", BX_SIM_ID);
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}
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if BX_PROVIDE_CPU_MEMORY
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void
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BX_MEM_C::init_memory(int memsize)
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{
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// you can pass 0 if memory has been allocated already through
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// the constructor, or the desired size of memory if it hasn't
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if (BX_MEM_THIS vector == NULL) {
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// memory not already allocated, do now...
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bx_printf("(%u) BX_MEM_C::init_memory(int): allocating memory.\n", BX_SIM_ID);
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bx_printf("(%u) memsize = %u\n", BX_SIM_ID, (unsigned) memsize);
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BX_MEM_THIS vector = new Bit8u[memsize];
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BX_MEM_THIS len = memsize;
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BX_MEM_THIS megabytes = memsize / (1024*1024);
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}
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// initialize all memory to 0x00
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memset(BX_MEM_THIS vector, 0x00, BX_MEM_THIS len);
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// initialize ROM area (0xc0000 .. 0xfffff) to 0xff
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memset(BX_MEM_THIS vector + 0xc0000, 0xff, 0x40000);
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#if BX_DEBUGGER
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// initialize dirty pages table
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memset(BX_MEM.dbg_dirty_pages, 0, sizeof(BX_MEM.dbg_dirty_pages));
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if (BX_MEM.megabytes > BX_MAX_DIRTY_PAGE_TABLE_MEGS) {
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bx_printf("Error: memory larger than dirty page table can handle\n");
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bx_panic("Error: increase BX_MAX_DIRTY_PAGE_TABLE_MEGS\n");
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}
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#endif
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if BX_PROVIDE_CPU_MEMORY
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void
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BX_MEM_C::load_ROM(const char *path, Bit32u romaddress)
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{
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struct stat stat_buf;
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int fd, ret;
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unsigned long size, offset;
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// read in ROM BIOS image file
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fd = open(path, O_RDONLY
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#ifdef O_BINARY
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| O_BINARY
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#endif
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);
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if (fd < 0) {
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fprintf(stderr, "load_ROM: couldn't open ROM image file '%s'.\n", path);
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exit(1);
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}
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ret = fstat(fd, &stat_buf);
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if (ret) {
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fprintf(stderr, "load_ROM: couldn't stat ROM image file '%s'.\n", path);
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exit(1);
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}
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size = stat_buf.st_size;
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if ( (romaddress + size) > BX_MEM_THIS len ) {
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fprintf(stderr, "load_ROM: ROM address range > physical memsize!\n");
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exit(1);
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}
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offset = 0;
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while (size > 0) {
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#if BX_PCI_SUPPORT
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if (bx_options.i440FXSupport)
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ret = read(fd, (bx_ptr_t) &bx_pci.s.i440fx.shadow[romaddress - 0xC0000 + offset],
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size);
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else
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ret = read(fd, (bx_ptr_t) &BX_MEM_THIS vector[romaddress + offset], size);
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#else
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ret = read(fd, (bx_ptr_t) &BX_MEM_THIS vector[romaddress + offset], size);
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#endif
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if (ret <= 0) {
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fprintf(stderr, "load_ROM: read failed on ROM BIOS image\n");
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exit(1);
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}
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size -= ret;
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offset += ret;
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}
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close(fd);
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#if BX_PCI_SUPPORT
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if (bx_options.i440FXSupport)
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bx_printf("(%u) load_ROM: ROM BIOS in i440FX RAM '%s', size=%u read into memory at %08x\n",
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BX_SIM_ID, path, (unsigned) stat_buf.st_size, (unsigned) romaddress);
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else
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bx_printf("(%u) load_ROM: ROM BIOS '%s', size=%u read into memory at %08x\n",
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BX_SIM_ID, path, (unsigned) stat_buf.st_size, (unsigned) romaddress);
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#else // #if BX_PCI_SUPPORT
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bx_printf("(%u) load_ROM: ROM BIOS '%s', size=%u read into memory at %08x\n",
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BX_SIM_ID, path, (unsigned) stat_buf.st_size, (unsigned) romaddress);
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#endif // #if BX_PCI_SUPPORT
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}
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#endif // #if BX_PROVIDE_CPU_MEMORY
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#if ( BX_DEBUGGER || BX_DISASM )
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Boolean
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BX_MEM_C::dbg_fetch_mem(Bit32u addr, unsigned len, Bit8u *buf)
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{
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if ( (addr + len) > BX_MEM.len ) {
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return(0); // error, beyond limits of memory
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}
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for (; len>0; len--) {
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#if BX_SUPPORT_VGA
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if ( (addr & 0xfffe0000) == 0x000a0000 ) {
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*buf = BX_VGA_MEM_READ(addr);
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}
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else {
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#endif
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#if BX_PCI_SUPPORT == 0
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*buf = BX_MEM.vector[addr];
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#else
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if ( bx_options.i440FXSupport &&
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((addr >= 0x000C0000) && (addr <= 0x000FFFFF)) ) {
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switch (bx_pci.rd_memType (addr)) {
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case 0x0: // Fetch from ShadowRAM
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*buf = BX_MEM.vector[addr];
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// bx_printf ("Fetching from ShadowRAM %08x, len %u !\n", (unsigned)addr, (unsigned)len);
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break;
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case 0x1: // Fetch from ROM
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*buf = bx_pci.s.i440fx.shadow[(addr - 0xC0000)];
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// bx_printf ("Fetching from ROM %08x, Data %02x \n", (unsigned)addr, *buf);
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break;
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default:
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bx_panic("dbg_fetch_mem: default case\n");
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}
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}
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else
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*buf = BX_MEM.vector[addr];
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#endif // #if BX_PCI_SUPPORT == 0
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}
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buf++;
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addr++;
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}
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return(1);
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}
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#endif
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#if BX_DEBUGGER
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Boolean
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BX_MEM_C::dbg_set_mem(Bit32u addr, unsigned len, Bit8u *buf)
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{
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if ( (addr + len) > BX_MEM.len ) {
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return(0); // error, beyond limits of memory
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}
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for (; len>0; len--) {
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#if BX_SUPPORT_VGA
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if ( (addr & 0xfffe0000) == 0x000a0000 ) {
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BX_VGA_MEM_WRITE(addr, *buf);
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}
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else
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#endif
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BX_MEM.vector[addr] = *buf;
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buf++;
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addr++;
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}
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return(1);
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}
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#endif
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Boolean
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BX_MEM_C::dbg_crc32(unsigned long (*f)(unsigned char *buf, int len),
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Bit32u addr1, Bit32u addr2, Bit32u *crc)
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{
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unsigned len;
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*crc = 0;
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if (addr1 > addr2)
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return(0);
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if (addr2 >= BX_MEM.len) {
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return(0); // error, specified address past last phy mem addr
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}
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len = 1 + addr2 - addr1;
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*crc = f(BX_MEM.vector + addr1, len);
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return(1);
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}
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