* lib.c
*/
#include <acess.h>
-#include <threads.h>
+#include <threads_int.h>
+#define TRACE_LOCKS 0
+
+#define DEBUG_TO_E9 1
+#define DEBUG_TO_SERIAL 1
+#define SERIAL_PORT 0x3F8
+#define GDB_SERIAL_PORT 0x2F8
+
+// === IMPRORTS ===
+#if TRACE_LOCKS
+extern struct sShortSpinlock glDebug_Lock;
+#endif
extern int GetCPUNum(void);
+// === PROTOTYPES ==
+Uint64 __udivdi3(Uint64 Num, Uint64 Den);
+Uint64 __umoddi3(Uint64 Num, Uint64 Den);
+
+// === GLOBALS ===
+ int gbDebug_SerialSetup = 0;
+ int gbGDB_SerialSetup = 0;
+
// === CODE ===
/**
* \brief Determine if a short spinlock is locked
#endif
#if LOCK_DISABLE_INTS
- // Save interrupt state and clear interrupts
- __ASM__ ("pushf;\n\tpop %%eax\n\tcli" : "=a"(IF));
+ // Save interrupt state
+ __ASM__ ("pushf;\n\tpop %0" : "=r"(IF));
IF &= 0x200; // AND out all but the interrupt flag
#endif
: "=a"(v)
: "a"(0), "r"(cpu), "r"(&Lock->Lock)
);
- #elseif STACKED_LOCKS == 2
+ #elif STACKED_LOCKS == 2
__ASM__("lock cmpxchgl %2, (%3)"
: "=a"(v)
: "a"(0), "r"(thread), "r"(&Lock->Lock)
#else
__ASM__("xchgl %%eax, (%%edi)":"=a"(v):"a"(1),"D"(&Lock->Lock));
#endif
+
+ #if LOCK_DISABLE_INTS
+ if( v ) __ASM__("sti"); // Re-enable interrupts
+ #endif
}
#if LOCK_DISABLE_INTS
+ __ASM__("cli");
Lock->IF = IF;
#endif
+
+ #if TRACE_LOCKS
+ if( Lock != &glDebug_Lock )
+ {
+ //Log_Log("LOCK", "%p locked by %p", Lock, __builtin_return_address(0));
+ LogF("Lock %p locked by %p\n", Lock, __builtin_return_address(0));
+ }
+ #endif
}
/**
* \brief Release a short lock
* \param Lock Lock pointer
*/
void SHORTREL(struct sShortSpinlock *Lock)
-{
+{
#if STACKED_LOCKS
if( Lock->Depth ) {
Lock->Depth --;
}
#endif
+ #if TRACE_LOCKS
+ if( Lock != &glDebug_Lock )
+ {
+ //Log_Log("LOCK", "%p released by %p", Lock, __builtin_return_address(0));
+ LogF("Lock %p released by %p\n", Lock, __builtin_return_address(0));
+ }
+ #endif
+
#if LOCK_DISABLE_INTS
// Lock->IF can change anytime once Lock->Lock is zeroed
if(Lock->IF) {
#endif
}
+// === DEBUG IO ===
+#if USE_GDB_STUB
+int putDebugChar(char ch)
+{
+ if(!gbGDB_SerialSetup) {
+ outb(GDB_SERIAL_PORT + 1, 0x00); // Disable all interrupts
+ outb(GDB_SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
+ outb(GDB_SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
+ outb(GDB_SERIAL_PORT + 1, 0x00); // (base is (hi byte)
+ outb(GDB_SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit (8N1)
+ outb(GDB_SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
+ outb(GDB_SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
+ gbDebug_SerialSetup = 1;
+ }
+ while( (inb(GDB_SERIAL_PORT + 5) & 0x20) == 0 );
+ outb(GDB_SERIAL_PORT, ch);
+ return 0;
+}
+int getDebugChar(void)
+{
+ if(!gbGDB_SerialSetup) {
+ outb(GDB_SERIAL_PORT + 1, 0x00); // Disable all interrupts
+ outb(GDB_SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
+ outb(GDB_SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
+ outb(GDB_SERIAL_PORT + 1, 0x00); // (hi byte)
+ outb(GDB_SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit
+ outb(GDB_SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
+ outb(GDB_SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
+ gbDebug_SerialSetup = 1;
+ }
+ while( (inb(GDB_SERIAL_PORT + 5) & 1) == 0) ;
+ return inb(GDB_SERIAL_PORT);
+}
+#endif /* USE_GDB_STUB */
+
+void Debug_PutCharDebug(char ch)
+{
+ #if DEBUG_TO_E9
+ __asm__ __volatile__ ( "outb %%al, $0xe9" :: "a"(((Uint8)ch)) );
+ #endif
+
+ #if DEBUG_TO_SERIAL
+ if(!gbDebug_SerialSetup) {
+ outb(SERIAL_PORT + 1, 0x00); // Disable all interrupts
+ outb(SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
+ outb(SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
+ outb(SERIAL_PORT + 1, 0x00); // (hi byte)
+ outb(SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit
+ outb(SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
+ outb(SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
+ gbDebug_SerialSetup = 1;
+ }
+ while( (inb(SERIAL_PORT + 5) & 0x20) == 0 );
+ outb(SERIAL_PORT, ch);
+ #endif
+}
+
+void Debug_PutStringDebug(const char *String)
+{
+ while(*String)
+ Debug_PutCharDebug(*String++);
+}
+
// === IO Commands ===
void outb(Uint16 Port, Uint8 Data)
{
*/
int memcmp(const void *m1, const void *m2, size_t Num)
{
+ const Uint8 *d1 = m1;
+ const Uint8 *d2 = m2;
+ if( Num == 0 ) return 0; // No bytes are always identical
+
while(Num--)
{
- if(*(Uint8*)m1 != *(Uint8*)m2) break;
- m1 ++;
- m2 ++;
+ if(*d1 != *d2)
+ return *d1 - *d2;
+ d1 ++;
+ d2 ++;
}
- return *(Uint8*)m1 - *(Uint8*)m2;
+ return 0;
}
/**
if(Num < Den*2) return 1;
if(Num == Den*2) return 2;
+ #if 1
+ i = 0; // Shut up
+ P[0] = Num;
+ P[1] = Den;
+ __asm__ __volatile__ (
+ "fildq %2\n\t" // Num
+ "fildq %1\n\t" // Den
+ "fdivp\n\t"
+ "fistpq %0"
+ : "=m" (q)
+ : "m" (P[0]), "m" (P[1])
+ );
+
+ //Log("%llx / %llx = %llx\n", Num, Den, q);
+ #else
// Restoring division, from wikipedia
// http://en.wikipedia.org/wiki/Division_(digital)
P[0] = Num; P[1] = 0;
P[1] += Den;
}
}
+ #endif
return q;
}
EXPORT(LittleEndian16); EXPORT(BigEndian16);
EXPORT(LittleEndian32); EXPORT(BigEndian32);
+
+EXPORT(SHORTLOCK);
+EXPORT(SHORTREL);
+EXPORT(IS_LOCKED);
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au