5 * - General arch-specific stuff
8 #include <threads_int.h>
13 #define DEBUG_TO_SERIAL 1
14 #define SERIAL_PORT 0x3F8
15 #define GDB_SERIAL_PORT 0x2F8
19 extern struct sShortSpinlock glDebug_Lock;
20 extern struct sShortSpinlock glThreadListLock;
22 extern int GetCPUNum(void);
25 Uint64 __divmod64(Uint64 Num, Uint64 Den, Uint64 *Rem);
26 Uint64 __udivdi3(Uint64 Num, Uint64 Den);
27 Uint64 __umoddi3(Uint64 Num, Uint64 Den);
30 int gbDebug_SerialSetup = 0;
31 int gbGDB_SerialSetup = 0;
35 * \brief Determine if a short spinlock is locked
36 * \param Lock Lock pointer
38 int IS_LOCKED(struct sShortSpinlock *Lock)
44 * \brief Check if the current CPU has the lock
45 * \param Lock Lock pointer
47 int CPU_HAS_LOCK(struct sShortSpinlock *Lock)
49 return Lock->Lock == GetCPUNum() + 1;
53 * \brief Acquire a Short Spinlock
54 * \param Lock Lock pointer
56 * This type of mutex should only be used for very short sections of code,
57 * or in places where a Mutex_* would be overkill, such as appending
58 * an element to linked list (usually two assignement lines in C)
60 * \note This type of lock halts interrupts, so ensure that no timing
61 * functions are called while it is held. As a matter of fact, spend as
62 * little time as possible with this lock held
63 * \note If \a STACKED_LOCKS is set, this type of spinlock can be nested
65 void SHORTLOCK(struct sShortSpinlock *Lock)
69 int cpu = GetCPUNum() + 1;
71 // Save interrupt state
72 __ASM__ ("pushf;\n\tpop %0" : "=r"(IF));
73 IF &= 0x200; // AND out all but the interrupt flag
76 if( Lock != &glDebug_Lock && Lock != &glThreadListLock )
78 //Log_Log("LOCK", "%p locked by %p", Lock, __builtin_return_address(0));
79 Debug("%p obtaining %p (Called by %p)", __builtin_return_address(0), Lock, __builtin_return_address(1));
85 // Wait for another CPU to release
87 "1: lock cmpxchgl %2, (%3)\n\t"
90 : "a"(0), "r"(cpu), "r"(&Lock->Lock)
96 if( Lock != &glDebug_Lock && Lock != &glThreadListLock )
98 //Log_Log("LOCK", "%p locked by %p", Lock, __builtin_return_address(0));
99 //Debug("Lock %p locked by %p\t%p", Lock, __builtin_return_address(0), __builtin_return_address(1));
105 * \brief Release a short lock
106 * \param Lock Lock pointer
108 void SHORTREL(struct sShortSpinlock *Lock)
111 if( Lock != &glDebug_Lock && Lock != &glThreadListLock )
113 //Log_Log("LOCK", "%p released by %p", Lock, __builtin_return_address(0));
114 Debug("Lock %p released by %p\t%p", Lock, __builtin_return_address(0), __builtin_return_address(1));
118 // Lock->IF can change anytime once Lock->Lock is zeroed
130 int putDebugChar(char ch)
132 if(!gbGDB_SerialSetup) {
133 outb(GDB_SERIAL_PORT + 1, 0x00); // Disable all interrupts
134 outb(GDB_SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
135 outb(GDB_SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
136 outb(GDB_SERIAL_PORT + 1, 0x00); // (base is (hi byte)
137 outb(GDB_SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit (8N1)
138 outb(GDB_SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
139 outb(GDB_SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
140 gbGDB_SerialSetup = 1;
142 while( (inb(GDB_SERIAL_PORT + 5) & 0x20) == 0 );
143 outb(GDB_SERIAL_PORT, ch);
146 int getDebugChar(void)
148 if(!gbGDB_SerialSetup) {
149 outb(GDB_SERIAL_PORT + 1, 0x00); // Disable all interrupts
150 outb(GDB_SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
151 outb(GDB_SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
152 outb(GDB_SERIAL_PORT + 1, 0x00); // (hi byte)
153 outb(GDB_SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit
154 outb(GDB_SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
155 outb(GDB_SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
156 gbGDB_SerialSetup = 1;
158 while( (inb(GDB_SERIAL_PORT + 5) & 1) == 0) ;
159 return inb(GDB_SERIAL_PORT);
161 #endif /* USE_GDB_STUB */
163 void Debug_PutCharDebug(char ch)
166 __asm__ __volatile__ ( "outb %%al, $0xe9" :: "a"(((Uint8)ch)) );
170 if(!gbDebug_SerialSetup) {
171 outb(SERIAL_PORT + 1, 0x00); // Disable all interrupts
172 outb(SERIAL_PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
173 outb(SERIAL_PORT + 0, 0x0C); // Set divisor to 12 (lo byte) 9600 baud
174 outb(SERIAL_PORT + 1, 0x00); // (hi byte)
175 outb(SERIAL_PORT + 3, 0x03); // 8 bits, no parity, one stop bit
176 outb(SERIAL_PORT + 2, 0xC7); // Enable FIFO with 14-byte threshold and clear it
177 outb(SERIAL_PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
178 gbDebug_SerialSetup = 1;
180 while( (inb(SERIAL_PORT + 5) & 0x20) == 0 );
181 outb(SERIAL_PORT, ch);
185 void Debug_PutStringDebug(const char *String)
188 Debug_PutCharDebug(*String++);
191 // === IO Commands ===
192 void outb(Uint16 Port, Uint8 Data)
194 __asm__ __volatile__ ("outb %%al, %%dx"::"d"(Port),"a"(Data));
196 void outw(Uint16 Port, Uint16 Data)
198 __asm__ __volatile__ ("outw %%ax, %%dx"::"d"(Port),"a"(Data));
200 void outd(Uint16 Port, Uint32 Data)
202 __asm__ __volatile__ ("outl %%eax, %%dx"::"d"(Port),"a"(Data));
204 Uint8 inb(Uint16 Port)
207 __asm__ __volatile__ ("inb %%dx, %%al":"=a"(ret):"d"(Port));
210 Uint16 inw(Uint16 Port)
213 __asm__ __volatile__ ("inw %%dx, %%ax":"=a"(ret):"d"(Port));
216 Uint32 ind(Uint16 Port)
219 __asm__ __volatile__ ("inl %%dx, %%eax":"=a"(ret):"d"(Port));
224 * \fn void *memset(void *Dest, int Val, size_t Num)
225 * \brief Do a byte granuality set of Dest
227 void *memset(void *Dest, int Val, size_t Num)
229 Uint32 val = Val&0xFF;
232 __asm__ __volatile__ (
236 :: "D" (Dest), "a" (val), "c" (Num/4), "r" (Num&3));
240 * \brief Set double words
242 void *memsetd(void *Dest, Uint32 Val, size_t Num)
244 __asm__ __volatile__ ("rep stosl" :: "D" (Dest), "a" (Val), "c" (Num));
249 * \fn int memcmp(const void *m1, const void *m2, size_t Num)
250 * \brief Compare two pieces of memory
252 int memcmp(const void *m1, const void *m2, size_t Num)
254 const Uint8 *d1 = m1;
255 const Uint8 *d2 = m2;
256 if( Num == 0 ) return 0; // No bytes are always identical
269 * \fn void *memcpy(void *Dest, const void *Src, size_t Num)
270 * \brief Copy \a Num bytes from \a Src to \a Dest
272 void *memcpy(void *Dest, const void *Src, size_t Num)
274 tVAddr dst = (tVAddr)Dest;
275 tVAddr src = (tVAddr)Src;
276 if( (dst & 3) != (src & 3) )
278 __asm__ __volatile__ ("rep movsb" :: "D" (dst), "S" (src), "c" (Num));
279 // Debug("\nmemcpy:Num=0x%x by %p (UA)", Num, __builtin_return_address(0));
282 else if( Num > 128 && (dst & 15) == (src & 15) )
284 char tmp[16+15]; // Note, this is a hack to save/restor xmm0
285 int count = 16 - (dst & 15);
286 // Debug("\nmemcpy:Num=0x%x by %p (SSE)", Num, __builtin_return_address(0));
290 __asm__ __volatile__ ("rep movsb" : "=D"(dst),"=S"(src): "0"(dst), "1"(src), "c"(count));
294 __asm__ __volatile__ (
295 "movdqa 0(%5), %%xmm0;\n\t"
297 "movdqa 0(%1), %%xmm0;\n\t"
298 "movdqa %%xmm0, 0(%0);\n\t"
302 "movdqa %%xmm0, 0(%5);\n\t"
303 : "=r"(dst),"=r"(src)
304 : "0"(dst), "1"(src), "c"(count), "r" (((tVAddr)tmp+15)&~15)
309 __asm__ __volatile__ ("rep movsb" :: "D"(dst), "S"(src), "c"(count));
314 // Debug("\nmemcpy:Num=0x%x by %p", Num, __builtin_return_address(0));
315 __asm__ __volatile__ (
319 :: "D" (Dest), "S" (Src), "c" (Num/4), "r" (Num&3));
325 * \fn void *memcpyd(void *Dest, const void *Src, size_t Num)
326 * \brief Copy \a Num DWORDs from \a Src to \a Dest
328 void *memcpyd(void *Dest, const void *Src, size_t Num)
330 __asm__ __volatile__ ("rep movsl" :: "D" (Dest), "S" (Src), "c" (Num));
334 #include "../helpers.h"
338 Uint64 DivMod64U(Uint64 Num, Uint64 Div, Uint64 *Rem)
340 if( Div < 0x100000000ULL && Num < 0xFFFFFFFF * Div ) {
342 __asm__ __volatile__(
344 : "=a" (ret_32), "=d" (rem)
345 : "a" ( (Uint32)(Num & 0xFFFFFFFF) ), "d" ((Uint32)(Num >> 32)), "r" (Div)
351 return __divmod64(Num, Div, Rem);
355 * \fn Uint64 __udivdi3(Uint64 Num, Uint64 Den)
356 * \brief Divide two 64-bit integers
358 Uint64 __udivdi3(Uint64 Num, Uint64 Den)
361 __asm__ __volatile__ ("int $0x0");
365 if(Num <= 0xFFFFFFFF && Den <= 0xFFFFFFFF)
366 return (Uint32)Num / (Uint32)Den;
367 if(Den == 1) return Num;
368 if(Den == 2) return Num >> 1; // Speed Hacks
369 if(Den == 4) return Num >> 2; // Speed Hacks
370 if(Den == 8) return Num >> 3; // Speed Hacks
371 if(Den == 16) return Num >> 4; // Speed Hacks
372 if(Den == 32) return Num >> 5; // Speed Hacks
373 if(Den == 1024) return Num >> 10; // Speed Hacks
374 if(Den == 2048) return Num >> 11; // Speed Hacks
375 if(Den == 4096) return Num >> 12;
376 if(Num < Den) return 0;
377 if(Num < Den*2) return 1;
378 if(Num == Den*2) return 2;
380 return __divmod64(Num, Den, NULL);
384 * \fn Uint64 __umoddi3(Uint64 Num, Uint64 Den)
385 * \brief Get the modulus of two 64-bit integers
387 Uint64 __umoddi3(Uint64 Num, Uint64 Den)
391 __asm__ __volatile__ ("int $0x0"); // Call Div by Zero Error
394 if(Den == 1) return 0; // Speed Hacks
395 if(Den == 2) return Num & 1; // Speed Hacks
396 if(Den == 4) return Num & 3; // Speed Hacks
397 if(Den == 8) return Num & 7; // Speed Hacks
398 if(Den == 16) return Num & 15; // Speed Hacks
399 if(Den == 32) return Num & 31; // Speed Hacks
400 if(Den == 1024) return Num & 1023; // Speed Hacks
401 if(Den == 2048) return Num & 2047; // Speed Hacks
402 if(Den == 4096) return Num & 4095; // Speed Hacks
404 if(Num >> 32 == 0 && Den >> 32 == 0)
405 return (Uint32)Num % (Uint32)Den;
407 __divmod64(Num, Den, &ret);
413 EXPORT(memcpy); EXPORT(memset);
415 //EXPORT(memcpyw); EXPORT(memsetw);
416 EXPORT(memcpyd); EXPORT(memsetd);
417 EXPORT(inb); EXPORT(inw); EXPORT(ind);
418 EXPORT(outb); EXPORT(outw); EXPORT(outd);
419 EXPORT(__udivdi3); EXPORT(__umoddi3);