Kernel - x86 Fixed a couple of bugs

[tpg/acess2.git] / Kernel / arch / x86 / include / arch.h

diff --git a/Kernel/arch/x86/include/arch.h b/Kernel/arch/x86/include/arch.h
index 67a6290..ade7491 100644 (file)
--- a/Kernel/arch/x86/include/arch.h
+++ b/Kernel/arch/x86/include/arch.h
@@ -10,6 +10,12 @@
 #define        KERNEL_BASE     0xC0000000
 #define BITS   32
 
+#define INVLPTR        ((void*)-1)
+
+// Allow nested spinlocks?
+#define STACKED_LOCKS  2       // 0: No, 1: Per-CPU, 2: Per-Thread
+#define LOCK_DISABLE_INTS      1
+
 // - Processor/Machine Specific Features
 #if ARCH != i386 && ARCH != i486 && ARCH != i586
 # error "Unknown architecture '" #ARCH "'"
@@ -29,47 +35,42 @@
 
 #define __ASM__        __asm__ __volatile__
 
-#define LONGLOCK_NUM_THREADS   8
-
-// === MACROS ===
-struct sShortSpinlock {
-       volatile int    Lock;
-        int    IF;
-};
+// === Spinlocks ===
 /**
- * \brief Determine if a short spinlock is locked
+ * \brief Short Spinlock structure
  */
-static inline int IS_LOCKED(struct sShortSpinlock *Lock) {
-       return !!Lock->Lock;
-}
-/**
- * \brief Acquire a Short Spinlock
- * \note Stops interrupts, so be careful
- */
-static inline void SHORTLOCK(struct sShortSpinlock *Lock) {
-        int    v = 1;
-       __ASM__ ("pushf;\n\tpop %%eax" : "=a"(Lock->IF));
-       Lock->IF &= 0x200;
-       __ASM__ ("cli");        // Stop task switches
-       // Wait for another CPU to release
-       while(v)
-               __ASM__("xchgl %%eax, (%%edi)":"=a"(v):"a"(1),"D"(&Lock->Lock));
-}
-/**
- * \brief Release a short lock
- */
-static inline void SHORTREL(struct sShortSpinlock *Lock) {
-       Lock->Lock = 0;
-       #if 0
-       __ASM__ ("pushf;\n\tor %0, (%%esp);\n\tpopf" : : "a"(Lock->IF));
+struct sShortSpinlock {
+       #if STACKED_LOCKS == 2
+       volatile void   *Lock;  //!< Lock value
        #else
-       if(Lock->IF)    __ASM__ ("sti");
+       volatile int    Lock;   //!< Lock value
        #endif
-}
+       
+       #if LOCK_DISABLE_INTS
+        int    IF;     //!< Interrupt state on call to SHORTLOCK
+       #endif
+       #if STACKED_LOCKS
+        int    Depth;
+       #endif
+};
+
+// === MACROS ===
 /**
- * \brief Halt the CPU
+ * \brief Halt the CPU (shorter version of yield)
  */
+#if 1
+#define        HALT()  do { \
+       Uint32  flags; \
+       __asm__ __volatile__ ("pushf;pop %0" : "=a"(flags)); \
+       if( !(flags & 0x200) )  Panic("HALT called with interrupts disabled"); \
+       __asm__ __volatile__ ("hlt"); \
+} while(0)
+#else
 #define        HALT()  __asm__ __volatile__ ("hlt")
+#endif
+/**
+ * \brief Fire a magic breakpoint (bochs)
+ */
 #define        MAGIC_BREAK()   __asm__ __volatile__ ("xchg %bx, %bx")
 
 // === TYPES ===
@@ -84,17 +85,18 @@ typedef signed short        Sint16;
 typedef signed long            Sint32;
 typedef signed long long       Sint64;
 typedef Uint   size_t;
+typedef char   BOOL;
 
 typedef Uint64 tPAddr;
 typedef Uint32 tVAddr;
 
 typedef struct {
-    Uint       gs, fs, es, ds;
-    Uint       edi, esi, ebp, kesp;
-       Uint    ebx, edx, ecx, eax;
-    Uint       int_num, err_code;
-    Uint       eip, cs;
-       Uint    eflags, esp, ss;
+       Uint32  gs, fs, es, ds;
+       Uint32  edi, esi, ebp, kesp;
+       Uint32  ebx, edx, ecx, eax;
+       Uint32  int_num, err_code;
+       Uint32  eip, cs;
+       Uint32  eflags, esp, ss;
 } tRegs;
 
 typedef struct {
@@ -130,6 +132,16 @@ typedef struct {
 
 typedef struct {
        Uint    EIP, ESP, EBP;
+       Uint32  UserCS, UserEIP;
 } tTaskState;
 
+// === FUNCTIONS ===
+extern void    Debug_PutCharDebug(char ch);
+extern void    Debug_PutStringDebug(const char *String);
+
+extern int     IS_LOCKED(struct sShortSpinlock *Lock);
+extern int     CPU_HAS_LOCK(struct sShortSpinlock *Lock);
+extern void    SHORTLOCK(struct sShortSpinlock *Lock);
+extern void    SHORTREL(struct sShortSpinlock *Lock);
+
 #endif // !defined(_ARCH_H_)