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Delay initialization of I/O permissions until they are first used.

oldstable
Alexandre Julliard 2000-06-03 04:50:59 +00:00
parent 7fe09bce86
commit de304909cd
2 changed files with 6 additions and 4 deletions
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1
include/miscemu.h
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@ -124,7 +124,6 @@ extern void INT_CtxSetHandler( CONTEXT86 *context, BYTE intnum, FARPROC16 handle
extern int INT_RealModeInterrupt( BYTE intnum, CONTEXT86 *context );
/* msdos/ioports.c */
extern void IO_port_init (void);
extern DWORD IO_inport( int port, int count );
extern void IO_outport( int port, int count, DWORD value );

9
msdos/ioports.c
View File

@ -63,7 +63,7 @@ static BYTE cmosimage[64] =
extern int iopl(int level);
static char do_direct_port_access = 0;
static char do_direct_port_access = -1;
static char port_permissions[0x10000];
#define IO_READ 1
@ -222,11 +222,12 @@ static inline void outl( DWORD value, WORD port )
#endif /* DIRECT_IO_ACCESS */
void IO_port_init()
static void IO_port_init(void)
{
#ifdef DIRECT_IO_ACCESS
char temp[1024];
do_direct_port_access = 0;
/* Can we do that? */
if (!iopl(3)) {
iopl(0);
@ -255,7 +256,8 @@ DWORD IO_inport( int port, int size )
TRACE("%d-byte value from port 0x%02x\n", size, port );
#ifdef DIRECT_IO_ACCESS
#ifdef DIRECT_IO_ACCESS
if (do_direct_port_access == -1) IO_port_init();
if ((do_direct_port_access)
/* Make sure we have access to the port */
&& (port_permissions[port] & IO_READ))
@ -365,6 +367,7 @@ void IO_outport( int port, int size, DWORD value )
value, size, port );
#ifdef DIRECT_IO_ACCESS
if (do_direct_port_access == -1) IO_port_init();
if ((do_direct_port_access)
/* Make sure we have access to the port */
&& (port_permissions[port] & IO_WRITE))