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rockbox/apps/plugins/rockboy/save.c
Rafaël Carré 5f4d687cb9 rockboy: use unions instead of type-punning 
avoid a warning when using -Os

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26734 a1c6a512-1295-4272-9138-f99709370657
2010-06-10 02:26:15 +00:00

280 lines
6.5 KiB
C
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#include "rockmacros.h"
#include "defs.h"
#include "cpu-gb.h"
#include "cpuregs.h"
#include "hw.h"
#include "regs.h"
#include "lcd-gb.h"
#include "rtc-gb.h"
#include "mem.h"
#include "sound.h"
#ifdef ROCKBOX_LITTLE_ENDIAN
#define LIL(x) (x)
#else
#define LIL(x) ((x<<24)|((x&0xff00)<<8)|((x>>8)&0xff00)|(x>>24))
#endif
#define I1(s, p) { 1, { s }, p }
#define I2(s, p) { 2, { s }, p }
#define I4(s, p) { 4, { s }, p }
#define R(r) I1(#r, &R_##r)
#define NOSAVE { -1, { "\0\0\0\0" }, 0 }
#define END { 0, { "\0\0\0\0" }, 0 }
struct svar
{
int len;
union
{
char key_[4];
un32 key;
} k;
void *ptr;
};
static int ver;
static int sramblock, iramblock, vramblock;
static int hramofs, hiofs, palofs, oamofs, wavofs;
struct svar svars[] =
{
I4("GbSs", &ver),
I2("PC ", &PC),
I2("SP ", &SP),
I2("HL ", &HL),
#ifdef DYNAREC
I1("A ", &A),
I1("B ", &A),
I1("C ", &A),
I1("D ", &A),
I1("E ", &A),
I1("F ", &A),
#else
I2("BC ", &BC),
I2("DE ", &DE),
I2("AF ", &AF),
#endif
I4("IME ", &cpu.ime),
I4("ima ", &cpu.ima),
I4("spd ", &cpu.speed),
I4("halt", &cpu.halt),
I4("div ", &cpu.div),
I4("tim ", &cpu.tim),
I4("lcdc", &cpu.lcdc),
I4("snd ", &cpu.snd),
I1("ints", &hw.ilines),
I1("pad ", &hw.pad),
I4("cgb ", &hw.cgb),
I4("mbcm", &mbc.model),
I4("romb", &mbc.rombank),
I4("ramb", &mbc.rambank),
I4("enab", &mbc.enableram),
I4("batt", &mbc.batt),
I4("rtcR", &rtc.sel),
I4("rtcL", &rtc.latch),
I4("rtcC", &rtc.carry),
I4("rtcS", &rtc.stop),
I4("rtcd", &rtc.d),
I4("rtch", &rtc.h),
I4("rtcm", &rtc.m),
I4("rtcs", &rtc.s),
I4("rtct", &rtc.t),
I1("rtR8", &rtc.regs[0]),
I1("rtR9", &rtc.regs[1]),
I1("rtRA", &rtc.regs[2]),
I1("rtRB", &rtc.regs[3]),
I1("rtRC", &rtc.regs[4]),
I4("S1on", &snd.ch[0].on),
I4("S1p ", &snd.ch[0].pos),
I4("S1c ", &snd.ch[0].len),
I4("S1ec", &snd.ch[0].enlen),
I4("S1sc", &snd.ch[0].swlen),
I4("S2on", &snd.ch[1].on),
I4("S2p ", &snd.ch[1].pos),
I4("S2c ", &snd.ch[1].len),
I4("S2ec", &snd.ch[1].enlen),
I4("S3on", &snd.ch[2].on),
I4("S3p ", &snd.ch[2].pos),
I4("S3c ", &snd.ch[2].len),
I4("S4on", &snd.ch[3].on),
I4("S4p ", &snd.ch[3].pos),
I4("S4c ", &snd.ch[3].len),
I4("S4ec", &snd.ch[3].enlen),
I4("hdma", &hw.hdma),
I4("sram", &sramblock),
I4("iram", &iramblock),
I4("vram", &vramblock),
I4("hi ", &hiofs),
I4("pal ", &palofs),
I4("oam ", &oamofs),
/* NOSAVE is a special code to prevent the rest of the table
* from being saved, used to support old stuff for backwards
* compatibility... */
NOSAVE,
/* the following are obsolete as of 0x104 */
I4("hram", &hramofs),
/* I4("gba ", &hw.gba), */
/* I4("S1sf", &snd.ch[0].swfreq), */
I4("wav ", &wavofs),
R(P1), R(SB), R(SC),
R(DIV), R(TIMA), R(TMA), R(TAC),
R(IE), R(IF),
R(LCDC), R(STAT), R(LY), R(LYC),
R(SCX), R(SCY), R(WX), R(WY),
R(BGP), R(OBP0), R(OBP1),
R(DMA),
R(VBK), R(SVBK), R(KEY1),
R(BCPS), R(BCPD), R(OCPS), R(OCPD),
R(NR10), R(NR11), R(NR12), R(NR13), R(NR14),
R(NR21), R(NR22), R(NR23), R(NR24),
R(NR30), R(NR31), R(NR32), R(NR33), R(NR34),
R(NR41), R(NR42), R(NR43), R(NR44),
R(NR50), R(NR51), R(NR52),
I1("DMA1", &R_HDMA1),
I1("DMA2", &R_HDMA2),
I1("DMA3", &R_HDMA3),
I1("DMA4", &R_HDMA4),
I1("DMA5", &R_HDMA5),
END
};
void loadstate(int fd)
{
int i, j;
byte buf[4096];
un32 (*header)[2] = (un32 (*)[2])buf;
un32 d;
int irl = hw.cgb ? 8 : 2;
int vrl = hw.cgb ? 4 : 2;
int srl = mbc.ramsize << 1;
size_t base_offset;
ver = hramofs = hiofs = palofs = oamofs = wavofs = 0;
base_offset = lseek(fd, 0, SEEK_CUR);
read(fd,buf, 4096);
for (j = 0; header[j][0]; j++)
{
for (i = 0; svars[i].ptr; i++)
{
if (header[j][0] != svars[i].k.key)
continue;
d = LIL(header[j][1]);
switch (svars[i].len)
{
case 1:
*(byte *)svars[i].ptr = d;
break;
case 2:
*(un16 *)svars[i].ptr = d;
break;
case 4:
*(un32 *)svars[i].ptr = d;
break;
}
break;
}
}
/* obsolete as of version 0x104 */
if (hramofs) memcpy(ram.hi+128, buf+hramofs, 127);
if (wavofs) memcpy(ram.hi+48, buf+wavofs, 16);
if (hiofs) memcpy(ram.hi, buf+hiofs, sizeof ram.hi);
if (palofs) memcpy(lcd.pal, buf+palofs, sizeof lcd.pal);
if (oamofs) memcpy(lcd.oam.mem, buf+oamofs, sizeof lcd.oam);
lseek(fd, base_offset + (iramblock << 12), SEEK_SET);
read(fd,ram.ibank, 4096*irl);
lseek(fd, base_offset + (vramblock << 12), SEEK_SET);
read(fd,lcd.vbank, 4096*vrl);
lseek(fd, base_offset + (sramblock << 12), SEEK_SET);
read(fd,ram.sbank, 4096*srl);
vram_dirty();
pal_dirty();
sound_dirty();
mem_updatemap();
}
void savestate(int fd)
{
int i;
byte buf[4096];
un32 (*header)[2] = (un32 (*)[2])buf;
un32 d = 0;
int irl = hw.cgb ? 8 : 2;
int vrl = hw.cgb ? 4 : 2;
int srl = mbc.ramsize << 1;
size_t base_offset;
ver = 0x104;
iramblock = 1;
vramblock = 1+irl;
sramblock = 1+irl+vrl;
hiofs = 4096 - 768;
palofs = 4096 - 512;
oamofs = 4096 - 256;
memset(buf, 0, sizeof buf);
for (i = 0; svars[i].len > 0; i++)
{
header[i][0] = svars[i].k.key;
switch (svars[i].len)
{
case 1:
d = *(byte *)svars[i].ptr;
break;
case 2:
d = *(un16 *)svars[i].ptr;
break;
case 4:
d = *(un32 *)svars[i].ptr;
break;
}
header[i][1] = LIL(d);
}
header[i][0] = header[i][1] = 0;
memcpy(buf+hiofs, ram.hi, sizeof ram.hi);
memcpy(buf+palofs, lcd.pal, sizeof lcd.pal);
memcpy(buf+oamofs, lcd.oam.mem, sizeof lcd.oam);
/* calculate base offset for output file */
/* (we'll seek relative to that from now on) */
base_offset = lseek(fd, 0, SEEK_CUR);
write(fd,buf, 4096);
lseek(fd, base_offset + (iramblock << 12), SEEK_SET);
write(fd,ram.ibank, 4096*irl);
lseek(fd, base_offset + (vramblock << 12), SEEK_SET);
write(fd,lcd.vbank, 4096*vrl);
lseek(fd, base_offset + (sramblock << 12), SEEK_SET);
write(fd,ram.sbank, 4096*srl);
}
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