aiie/vmram.cpp
Jorj Bauer 99d0c8e72c Squashed commit of
* New BIOS interface
 * New linux framebuffer version
 * Unified linuxfb and SDL with Teensy
 * Abstracted VM RAM
 * Fixed disk image corruption due to bad cache handling
 * Variable CPU speed support
2018-02-07 10:28:40 -05:00

92 lines
1.8 KiB
C++

#ifdef TEENSYDUINO
#include <Arduino.h>
#endif
#include "vmram.h"
#include <string.h>
#include "globals.h"
#ifndef TEENSYDUINO
#include <assert.h>
#else
#define assert(x) { if (!(x)) {Serial.print("assertion failed at "); Serial.println(__LINE__); delay(10000);} }
//#define assert(x) { }
#endif
// Serializing token for RAM data
#define RAMMAGIC 'R'
VMRam::VMRam() {memset(preallocatedRam, 0, sizeof(preallocatedRam)); }
VMRam::~VMRam() { }
void VMRam::init()
{
for (uint32_t i=0; i<sizeof(preallocatedRam); i++) {
preallocatedRam[i] = 0;
}
}
uint8_t VMRam::readByte(uint32_t addr)
{
return preallocatedRam[addr];
}
void VMRam::writeByte(uint32_t addr, uint8_t value)
{
preallocatedRam[addr] = value;
}
bool VMRam::Serialize(int8_t fd)
{
g_filemanager->writeByte(fd, RAMMAGIC);
uint32_t size = sizeof(preallocatedRam);
g_filemanager->writeByte(fd, (size >> 24) & 0xFF);
g_filemanager->writeByte(fd, (size >> 16) & 0xFF);
g_filemanager->writeByte(fd, (size >> 8) & 0xFF);
g_filemanager->writeByte(fd, (size ) & 0xFF);
for (uint32_t pos = 0; pos < sizeof(preallocatedRam); pos++) {
g_filemanager->writeByte(fd, preallocatedRam[pos]);
}
g_filemanager->writeByte(fd, RAMMAGIC);
return true;
}
bool VMRam::Deserialize(int8_t fd)
{
if (g_filemanager->readByte(fd) != RAMMAGIC) {
return false;
}
uint32_t size = 0;
size = g_filemanager->readByte(fd);
size <<= 8;
size |= g_filemanager->readByte(fd);
size <<= 8;
size |= g_filemanager->readByte(fd);
size <<= 8;
size |= g_filemanager->readByte(fd);
if (size != sizeof(preallocatedRam)) {
return false;
}
for (uint32_t pos = 0; pos < sizeof(preallocatedRam); pos++) {
preallocatedRam[pos] = g_filemanager->readByte(fd);
}
if (g_filemanager->readByte(fd) != RAMMAGIC) {
return false;
}
return true;
}
bool VMRam::Test()
{
return true;
}