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version 1.1, 2003/12/08 00:55:31
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version 1.3, 2004/02/05 16:43:44
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Line 34
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Line 34
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| static void |
static void |
| check_io(WORD port, int len) |
check_io(WORD port, DWORD len) |
| { |
{ |
| WORD off; |
WORD off; |
| BYTE bit; |
BYTE bit; |
| BYTE map; |
BYTE map; |
| |
|
| /* そもそも I/O 許可マップが無い場合 */ |
|
| if (CPU_STAT_IOLIMIT == 0) { |
if (CPU_STAT_IOLIMIT == 0) { |
| |
VERBOSE(("check_io: CPU_STAT_IOLIMIT == 0 (port = %04x, len = %d)", port, len)); |
| EXCEPTION(GP_EXCEPTION, 0); |
EXCEPTION(GP_EXCEPTION, 0); |
| } |
} |
| |
|
| off = port / 8; |
off = port / 8; |
| bit = 1 << (port % 8); |
bit = 1 << (port % 8); |
| for (; len > 0; ++off, bit = 0x01) { |
for (; len > 0; ++off, bit = 0x01) { |
| /* I/O 許可マップはビット単位なので */ |
if (off >= CPU_STAT_IOLIMIT) { |
| if (off * 8 >= CPU_STAT_IOLIMIT) { |
VERBOSE(("check_io: off(%08x) >= CPU_STAT_IOLIMIT(%08x) (port = %04x, len = %d)", off, CPU_STAT_IOLIMIT, port, len)); |
| EXCEPTION(GP_EXCEPTION, 0); |
EXCEPTION(GP_EXCEPTION, 0); |
| } |
} |
| |
|
| map = cpu_lmemoryread(CPU_STAT_IOADDR + off); |
map = cpu_kmemoryread(CPU_STAT_IOADDR + off); |
| for (; (len > 0) && (bit != 0x00); bit <<= 1, --len) { |
for (; (len > 0) && (bit != 0x00); bit <<= 1, --len) { |
| if (map & bit) { |
if (map & bit) { |
| |
VERBOSE(("check_io: (bitmap(0x%02x) & bit(0x%02x)) != 0 (port = %04x, len = %d)", map, bit, port, len)); |
| EXCEPTION(GP_EXCEPTION, 0); |
EXCEPTION(GP_EXCEPTION, 0); |
| } |
} |
| } |
} |
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