RaySollium99/picodrive
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protection and more mapper support for new mem code

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@771 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-09-09 16:00:42 +00:00
parent 45f2f245f5
commit 000f53350c
7 changed files with 512 additions and 109 deletions
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92
pico/cart.c
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@ -379,7 +379,7 @@ int pm_close(pm_file *fp)
}
void Byteswap(unsigned char *data,int len)
static void Byteswap(unsigned char *data,int len)
{
int i=0;
@ -612,6 +612,18 @@ void PicoCartUnload(void)
}
}
static unsigned int rom_crc32(void)
{
unsigned int crc;
elprintf(EL_STATUS, "caclulating CRC32..");
// have to unbyteswap for calculation..
Byteswap(Pico.rom, Pico.romsize);
crc = crc32(0, Pico.rom, Pico.romsize);
Byteswap(Pico.rom, Pico.romsize);
return crc;
}
static int rom_strcmp(int rom_offset, const char *s1)
{
int i, len = strlen(s1);
@ -643,6 +655,30 @@ static void rstrip(char *s)
*p = 0;
}
static int parse_3_vals(char *p, int *val0, int *val1, int *val2)
{
char *r;
*val0 = strtoul(p, &r, 0);
if (r == p)
goto bad;
p = sskip(r);
if (*p++ != ',')
goto bad;
*val1 = strtoul(p, &r, 0);
if (r == p)
goto bad;
p = sskip(r);
if (*p++ != ',')
goto bad;
*val2 = strtoul(p, &r, 0);
if (r == p)
goto bad;
return 1;
bad:
return 0;
}
static int is_expr(const char *expr, char **pr)
{
int len = strlen(expr);
@ -661,6 +697,7 @@ static int is_expr(const char *expr, char **pr)
static void parse_carthw(int *fill_sram)
{
int line = 0, any_checks_passed = 0, skip_sect = 0;
int tmp, rom_crc = 0;
char buff[256], *p, *r;
FILE *f;
@ -739,6 +776,21 @@ static void parse_carthw(int *fill_sram)
skip_sect = 1;
continue;
}
else if (is_expr("check_crc32", &p))
{
unsigned int crc;
crc = strtoul(p, &r, 0);
if (r == p)
goto bad;
if (rom_crc == 0)
rom_crc = rom_crc32();
if (crc == rom_crc)
any_checks_passed = 1;
else
skip_sect = 1;
continue;
}
/* now time for actions */
if (is_expr("hw", &p)) {
@ -750,12 +802,18 @@ static void parse_carthw(int *fill_sram)
PicoSVPStartup();
else if (strcmp(p, "pico") == 0)
PicoInitPico();
else if (strcmp(p, "prot") == 0)
carthw_sprot_startup();
else if (strcmp(p, "ssf2_mapper") == 0)
carthw_ssf2_startup();
else if (strcmp(p, "x_in_1_mapper") == 0)
carthw_Xin1_startup();
else if (strcmp(p, "realtec_mapper") == 0)
carthw_realtec_startup();
else if (strcmp(p, "radica_mapper") == 0)
carthw_radica_startup();
else if (strcmp(p, "prot_lk3") == 0)
carthw_prot_lk3_startup();
else {
elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);
skip_sect = 1;
@ -823,20 +881,10 @@ static void parse_carthw(int *fill_sram)
goto no_checks;
rstrip(p);
scl = strtoul(p, &r, 0);
if (r == p || scl < 0 || scl > 15)
if (!parse_3_vals(p, &scl, &sda_in, &sda_out))
goto bad;
p = sskip(r);
if (*p++ != ',')
goto bad;
sda_in = strtoul(p, &r, 0);
if (r == p || sda_in < 0 || sda_in > 15)
goto bad;
p = sskip(r);
if (*p++ != ',')
goto bad;
sda_out = strtoul(p, &r, 0);
if (r == p || sda_out < 0 || sda_out > 15)
if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||
sda_out < 0 || sda_out > 15)
goto bad;
SRam.eeprom_bit_cl = scl;
@ -844,6 +892,18 @@ static void parse_carthw(int *fill_sram)
SRam.eeprom_bit_out= sda_out;
continue;
}
else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {
int addr, mask, val;
if (!any_checks_passed)
goto no_checks;
rstrip(p);
if (!parse_3_vals(p, &addr, &mask, &val))
goto bad;
carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);
continue;
}
bad:
@ -865,9 +925,7 @@ no_checks:
*/
static void PicoCartDetect(void)
{
int fill_sram = 0, csum;
csum = rom_read32(0x18c) & 0xffff;
int fill_sram = 0;
memset(&SRam, 0, sizeof(SRam));
if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')