325 lines
7.9 KiB
C
325 lines
7.9 KiB
C
static __inline void breakpoint(void) __attribute__((always_inline));
|
|
static __inline uint8_t inb(int port) __attribute__((always_inline));
|
|
static __inline void insb(int port, void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline uint16_t inw(int port) __attribute__((always_inline));
|
|
static __inline void insw(int port, void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline uint32_t inl(int port) __attribute__((always_inline));
|
|
static __inline void insl(int port, void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline void outb(int port, uint8_t data) __attribute__((always_inline));
|
|
static __inline void outsb(int port, const void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline void outw(int port, uint16_t data) __attribute__((always_inline));
|
|
static __inline void outsw(int port, const void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline void outsl(int port, const void *addr, int cnt) __attribute__((always_inline));
|
|
static __inline void outl(int port, uint32_t data) __attribute__((always_inline));
|
|
static __inline void invlpg(void *addr) __attribute__((always_inline));
|
|
static __inline void lidt(void *p) __attribute__((always_inline));
|
|
static __inline void lldt(uint16_t sel) __attribute__((always_inline));
|
|
static __inline void ltr(uint16_t sel) __attribute__((always_inline));
|
|
static __inline void lcr0(uint32_t val) __attribute__((always_inline));
|
|
static __inline uint32_t rcr0(void) __attribute__((always_inline));
|
|
static __inline uint32_t rcr2(void) __attribute__((always_inline));
|
|
static __inline void lcr3(uint32_t val) __attribute__((always_inline));
|
|
static __inline uint32_t rcr3(void) __attribute__((always_inline));
|
|
static __inline void lcr4(uint32_t val) __attribute__((always_inline));
|
|
static __inline uint32_t rcr4(void) __attribute__((always_inline));
|
|
static __inline void tlbflush(void) __attribute__((always_inline));
|
|
static __inline uint32_t read_eflags(void) __attribute__((always_inline));
|
|
static __inline void write_eflags(uint32_t eflags) __attribute__((always_inline));
|
|
static __inline uint32_t read_ebp(void) __attribute__((always_inline));
|
|
static __inline uint32_t read_esp(void) __attribute__((always_inline));
|
|
static __inline void cpuid(uint32_t info, uint32_t *eaxp, uint32_t *ebxp, uint32_t *ecxp, uint32_t *edxp);
|
|
static __inline uint64_t read_tsc(void) __attribute__((always_inline));
|
|
|
|
static __inline void
|
|
breakpoint(void)
|
|
{
|
|
__asm __volatile("int3");
|
|
}
|
|
|
|
static __inline uint8_t
|
|
inb(int port)
|
|
{
|
|
uint8_t data;
|
|
__asm __volatile("inb %w1,%0" : "=a" (data) : "d" (port));
|
|
return data;
|
|
}
|
|
|
|
static __inline void
|
|
insb(int port, void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\tinsb" :
|
|
"=D" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"memory", "cc");
|
|
}
|
|
|
|
static __inline uint16_t
|
|
inw(int port)
|
|
{
|
|
uint16_t data;
|
|
__asm __volatile("inw %w1,%0" : "=a" (data) : "d" (port));
|
|
return data;
|
|
}
|
|
|
|
static __inline void
|
|
insw(int port, void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\tinsw" :
|
|
"=D" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"memory", "cc");
|
|
}
|
|
|
|
static __inline uint32_t
|
|
inl(int port)
|
|
{
|
|
uint32_t data;
|
|
__asm __volatile("inl %w1,%0" : "=a" (data) : "d" (port));
|
|
return data;
|
|
}
|
|
|
|
static __inline void
|
|
insl(int port, void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\tinsl" :
|
|
"=D" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"memory", "cc");
|
|
}
|
|
|
|
static __inline void
|
|
outb(int port, uint8_t data)
|
|
{
|
|
__asm __volatile("outb %0,%w1" : : "a" (data), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
outsb(int port, const void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\toutsb" :
|
|
"=S" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"cc");
|
|
}
|
|
|
|
static __inline void
|
|
outw(int port, uint16_t data)
|
|
{
|
|
__asm __volatile("outw %0,%w1" : : "a" (data), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
outsw(int port, const void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\toutsw" :
|
|
"=S" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"cc");
|
|
}
|
|
|
|
static __inline void
|
|
outsl(int port, const void *addr, int cnt)
|
|
{
|
|
__asm __volatile("cld\n\trepne\n\toutsl" :
|
|
"=S" (addr), "=c" (cnt) :
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"cc");
|
|
}
|
|
|
|
static __inline void
|
|
outl(int port, uint32_t data)
|
|
{
|
|
__asm __volatile("outl %0,%w1" : : "a" (data), "d" (port));
|
|
}
|
|
|
|
static __inline void
|
|
invlpg(void *addr)
|
|
{
|
|
__asm __volatile("invlpg (%0)" : : "r" (addr) : "memory");
|
|
}
|
|
|
|
static __inline void
|
|
lidt(void *p)
|
|
{
|
|
__asm __volatile("lidt (%0)" : : "r" (p));
|
|
}
|
|
|
|
static __inline void
|
|
lldt(uint16_t sel)
|
|
{
|
|
__asm __volatile("lldt %0" : : "r" (sel));
|
|
}
|
|
|
|
static __inline void
|
|
ltr(uint16_t sel)
|
|
{
|
|
__asm __volatile("ltr %0" : : "r" (sel));
|
|
}
|
|
|
|
static __inline void
|
|
lcr0(uint32_t val)
|
|
{
|
|
__asm __volatile("movl %0,%%cr0" : : "r" (val));
|
|
}
|
|
|
|
static __inline uint32_t
|
|
rcr0(void)
|
|
{
|
|
uint32_t val;
|
|
__asm __volatile("movl %%cr0,%0" : "=r" (val));
|
|
return val;
|
|
}
|
|
|
|
static __inline uint32_t
|
|
rcr2(void)
|
|
{
|
|
uint32_t val;
|
|
__asm __volatile("movl %%cr2,%0" : "=r" (val));
|
|
return val;
|
|
}
|
|
|
|
static __inline void
|
|
lcr3(uint32_t val)
|
|
{
|
|
__asm __volatile("movl %0,%%cr3" : : "r" (val));
|
|
}
|
|
|
|
static __inline uint32_t
|
|
rcr3(void)
|
|
{
|
|
uint32_t val;
|
|
__asm __volatile("movl %%cr3,%0" : "=r" (val));
|
|
return val;
|
|
}
|
|
|
|
static __inline void
|
|
lcr4(uint32_t val)
|
|
{
|
|
__asm __volatile("movl %0,%%cr4" : : "r" (val));
|
|
}
|
|
|
|
static __inline uint32_t
|
|
rcr4(void)
|
|
{
|
|
uint32_t cr4;
|
|
__asm __volatile("movl %%cr4,%0" : "=r" (cr4));
|
|
return cr4;
|
|
}
|
|
|
|
static __inline void
|
|
tlbflush(void)
|
|
{
|
|
uint32_t cr3;
|
|
__asm __volatile("movl %%cr3,%0" : "=r" (cr3));
|
|
__asm __volatile("movl %0,%%cr3" : : "r" (cr3));
|
|
}
|
|
|
|
static __inline uint32_t
|
|
read_eflags(void)
|
|
{
|
|
uint32_t eflags;
|
|
__asm __volatile("pushfl; popl %0" : "=r" (eflags));
|
|
return eflags;
|
|
}
|
|
|
|
static __inline void
|
|
write_eflags(uint32_t eflags)
|
|
{
|
|
__asm __volatile("pushl %0; popfl" : : "r" (eflags));
|
|
}
|
|
|
|
static __inline uint32_t
|
|
read_ebp(void)
|
|
{
|
|
uint32_t ebp;
|
|
__asm __volatile("movl %%ebp,%0" : "=r" (ebp));
|
|
return ebp;
|
|
}
|
|
|
|
static __inline uint32_t
|
|
read_esp(void)
|
|
{
|
|
uint32_t esp;
|
|
__asm __volatile("movl %%esp,%0" : "=r" (esp));
|
|
return esp;
|
|
}
|
|
|
|
static __inline void
|
|
cpuid(uint32_t info, uint32_t *eaxp, uint32_t *ebxp, uint32_t *ecxp, uint32_t *edxp)
|
|
{
|
|
uint32_t eax, ebx, ecx, edx;
|
|
asm volatile("cpuid"
|
|
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
|
|
: "a" (info));
|
|
if (eaxp)
|
|
*eaxp = eax;
|
|
if (ebxp)
|
|
*ebxp = ebx;
|
|
if (ecxp)
|
|
*ecxp = ecx;
|
|
if (edxp)
|
|
*edxp = edx;
|
|
}
|
|
|
|
static __inline uint32_t
|
|
cmpxchg(uint32_t oldval, uint32_t newval, volatile uint32_t* lock_addr)
|
|
{
|
|
uint32_t result;
|
|
__asm__ __volatile__(
|
|
"lock; cmpxchgl %2, %0"
|
|
:"+m" (*lock_addr), "=a" (result) : "r"(newval), "1"(oldval) : "cc"
|
|
);
|
|
return result;
|
|
}
|
|
|
|
static __inline uint64_t
|
|
read_tsc(void)
|
|
{
|
|
uint64_t tsc;
|
|
__asm __volatile("rdtsc" : "=A" (tsc));
|
|
return tsc;
|
|
}
|
|
|
|
struct PushRegs {
|
|
/* registers as pushed by pusha */
|
|
uint32_t reg_edi;
|
|
uint32_t reg_esi;
|
|
uint32_t reg_ebp;
|
|
uint32_t reg_oesp; /* Useless */
|
|
uint32_t reg_ebx;
|
|
uint32_t reg_edx;
|
|
uint32_t reg_ecx;
|
|
uint32_t reg_eax;
|
|
};
|
|
|
|
struct Trapframe {
|
|
struct PushRegs tf_regs;
|
|
uint16_t tf_es;
|
|
uint16_t tf_padding1;
|
|
uint16_t tf_ds;
|
|
uint16_t tf_padding2;
|
|
uint32_t tf_trapno;
|
|
/* below here defined by x86 hardware */
|
|
uint32_t tf_err;
|
|
uintptr_t tf_eip;
|
|
uint16_t tf_cs;
|
|
uint16_t tf_padding3;
|
|
uint32_t tf_eflags;
|
|
/* below here only when crossing rings, such as from user to kernel */
|
|
uintptr_t tf_esp;
|
|
uint16_t tf_ss;
|
|
uint16_t tf_padding4;
|
|
};
|
|
|
|
|
|
#define MAX_IRQS 16 // Number of IRQs
|
|
|
|
// I/O Addresses of the two 8259A programmable interrupt controllers
|
|
#define IO_PIC1 0x20 // Master (IRQs 0-7)
|
|
#define IO_PIC2 0xA0 // Slave (IRQs 8-15)
|
|
|
|
#define IRQ_SLAVE 2 // IRQ at which slave connects to master
|
|
#define IRQ_OFFSET 32 // IRQ 0 corresponds to int IRQ_OFFSET
|
|
|
|
#define IRQ_ERROR 19
|
|
#define IRQ_SPURIOUS 31
|