2 * AcessOS Microkernel Version
8 void Spinlock(int *lock)
11 while(v) __asm__ __volatile__ ("lock xchgl %%eax, (%%edi)":"=a"(v):"a"(1),"D"(lock));
14 void Release(int *lock)
16 __asm__ __volatile__ ("lock andl $0, (%0)"::"r"(lock));
19 // === IO Commands ===
20 void outb(Uint16 Port, Uint8 Data)
22 __asm__ __volatile__ ("outb %%al, %%dx"::"d"(Port),"a"(Data));
24 void outw(Uint16 Port, Uint16 Data)
26 __asm__ __volatile__ ("outw %%ax, %%dx"::"d"(Port),"a"(Data));
28 void outd(Uint16 Port, Uint32 Data)
30 __asm__ __volatile__ ("outl %%eax, %%dx"::"d"(Port),"a"(Data));
32 Uint8 inb(Uint16 Port)
35 __asm__ __volatile__ ("inb %%dx, %%al":"=a"(ret):"d"(Port));
38 Uint16 inw(Uint16 Port)
41 __asm__ __volatile__ ("inw %%dx, %%ax":"=a"(ret):"d"(Port));
44 Uint32 ind(Uint16 Port)
47 __asm__ __volatile__ ("inl %%dx, %%eax":"=a"(ret):"d"(Port));
52 * \fn void *memset(void *Dest, int Val, Uint Num)
53 * \brief Do a byte granuality set of Dest
55 void *memset(void *Dest, int Val, Uint Num)
57 __asm__ __volatile__ (
61 :: "D" (Dest), "a" (Val), "c" (Num/4), "r" (Num&3));
65 * \fn void *memsetd(void *Dest, Uint Val, Uint Num)
67 void *memsetd(void *Dest, Uint Val, Uint Num)
69 __asm__ __volatile__ ("rep stosl" :: "D" (Dest), "a" (Val), "c" (Num));
74 * \fn int memcmp(const void *m1, const void *m2, Uint Num)
75 * \brief Compare two pieces of memory
77 int memcmp(const void *m1, const void *m2, Uint Num)
81 if(*(Uint8*)m1 != *(Uint8*)m2) break;
85 return *(Uint8*)m1 - *(Uint8*)m2;
89 * \fn void *memcpy(void *Dest, void *Src, Uint Num)
91 void *memcpy(void *Dest, const void *Src, Uint Num)
93 if((Uint)Dest & 3 || (Uint)Src & 3)
94 __asm__ __volatile__ ("rep movsb" :: "D" (Dest), "S" (Src), "c" (Num));
96 __asm__ __volatile__ (
100 :: "D" (Dest), "S" (Src), "c" (Num/4), "r" (Num&3));
105 * \fn void *memcpyd(void *Dest, void *Src, Uint Num)
107 void *memcpyd(void *Dest, const void *Src, Uint Num)
109 __asm__ __volatile__ ("rep movsl" :: "D" (Dest), "S" (Src), "c" (Num));
114 * \fn Uint64 __udivdi3(Uint64 Num, Uint64 Den)
115 * \brief Divide two 64-bit integers
117 Uint64 __udivdi3(Uint64 Num, Uint64 Den)
121 if(Den == 0) __asm__ __volatile__ ("int $0x0"); // Call Div by Zero Error
122 if(Den == 1) return Num; // Speed Hacks
123 if(Den == 2) return Num >> 1; // Speed Hacks
124 if(Den == 4) return Num >> 2; // Speed Hacks
125 if(Den == 8) return Num >> 3; // Speed Hacks
126 if(Den == 16) return Num >> 4; // Speed Hacks
127 if(Den == 32) return Num >> 5; // Speed Hacks
128 if(Den == 1024) return Num >> 10; // Speed Hacks
129 if(Den == 2048) return Num >> 11; // Speed Hacks
130 if(Den == 4096) return Num >> 12;
132 if(Num >> 32 == 0 && Den >> 32 == 0)
133 return (Uint32)Num / (Uint32)Den;
135 //Log("__udivdi3: (Num={0x%x:%x}, Den={0x%x:%x})",
136 // Num>>32, Num&0xFFFFFFFF,
137 // Den>>32, Den&0xFFFFFFFF);
147 * \fn Uint64 __umoddi3(Uint64 Num, Uint64 Den)
148 * \brief Get the modulus of two 64-bit integers
150 Uint64 __umoddi3(Uint64 Num, Uint64 Den)
152 if(Den == 0) __asm__ __volatile__ ("int $0x0"); // Call Div by Zero Error
153 if(Den == 1) return 0; // Speed Hacks
154 if(Den == 2) return Num & 1; // Speed Hacks
155 if(Den == 4) return Num & 3; // Speed Hacks
156 if(Den == 8) return Num & 7; // Speed Hacks
157 if(Den == 16) return Num & 15; // Speed Hacks
158 if(Den == 32) return Num & 31; // Speed Hacks
159 if(Den == 1024) return Num & 1023; // Speed Hacks
160 if(Den == 2048) return Num & 2047; // Speed Hacks
161 if(Den == 4096) return Num & 4095; // Speed Hacks
163 if(Num >> 32 == 0 && Den >> 32 == 0)
164 return (Uint32)Num % (Uint32)Den;
171 Uint16 LittleEndian16(Uint16 Val)
175 Uint16 BigEndian16(Uint16 Val)
177 return ((Val&0xFF)<<8) | ((Val>>8)&0xFF);
179 Uint32 LittleEndian32(Uint32 Val)
183 Uint32 BigEndian32(Uint32 Val)
185 return ((Val&0xFF)<<24) | ((Val&0xFF00)<<8) | ((Val>>8)&0xFF00) | ((Val>>24)&0xFF);
189 EXPORT(memcpy); EXPORT(memset);
190 //EXPORT(memcpyw); EXPORT(memsetw);
191 EXPORT(memcpyd); EXPORT(memsetd);
192 EXPORT(inb); EXPORT(inw); EXPORT(ind);
193 EXPORT(outb); EXPORT(outw); EXPORT(outd);
194 EXPORT(__udivdi3); EXPORT(__umoddi3);