#ifndef _ARCH_H_
#define _ARCH_H_
-// - Memory Layout
-#define MM_USER_MIN 0x00200000
-#define USER_STACK_SZ 0x00010000
-#define USER_STACK_TOP 0x00200000
-#define MM_USER_MAX 0xBC000000
-#define MM_PPD_MIN 0xBC000000 // Per-Process Data
-#define MM_PPD_VFS 0xBC000000 //
-#define MM_PPD_CFG 0xBFFFF000 //
-#define MM_PPD_MAX 0xB0000000
+// - Base Defintions
#define KERNEL_BASE 0xC0000000
-#define MM_KHEAP_BASE 0xC0400000 // C+4MiB
-#define MM_KHEAP_MAX 0xCF000000 //
-#define MM_KERNEL_VFS 0xCF000000 //
-#define MM_KUSER_CODE 0xCFFF0000 // 16 Pages
-#define MM_MODULE_MIN 0xD0000000 // Lowest Module Address
-#define MM_MODULE_MAX 0xF0000000 // 512 MiB
-
#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
-// Uses no advanced features
-# define USE_MP 0
-# define USE_PAE 0
-#elif ARCH == i586
-// All Enabled
-# define USE_MP 1
-# define USE_PAE 1
-#else
+#if ARCH != i386 && ARCH != i486 && ARCH != i586
# error "Unknown architecture '" #ARCH "'"
#endif
# define MAX_CPUS 1
#endif
+#if USE_PAE
+# define PHYS_BITS 48
+#else
+# define PHYS_BITS 32
+#endif
+
+#define __ASM__ __asm__ __volatile__
+
+// === Spinlocks ===
+/**
+ * \brief Short Spinlock structure
+ */
+struct sShortSpinlock {
+ #if STACKED_LOCKS == 2
+ volatile void *Lock; //!< Lock value
+ #else
+ 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 ===
-#define LOCK(lockptr) do {int v=1;\
- while(v)__asm__ __volatile__("lock xchgl %%eax, (%%edi)":"=a"(v):"a"(1),"D"(lockptr));}while(0)
-#define RELEASE(lockptr) __asm__ __volatile__("lock andl $0, (%%edi)"::"D"(lockptr));
+/**
+ * \brief Halt the CPU (shorter version of yield)
+ */
#define HALT() __asm__ __volatile__ ("hlt")
+/**
+ * \brief Fire a magic breakpoint (bochs)
+ */
+#define MAGIC_BREAK() __asm__ __volatile__ ("xchg %bx, %bx")
// === TYPES ===
typedef unsigned int Uint; // Unsigned machine native integer
typedef signed long Sint32;
typedef signed long long Sint64;
typedef Uint size_t;
+typedef char BOOL;
-#if USE_PAE
typedef Uint64 tPAddr;
-#else
-typedef Uint32 tPAddr;
-#endif
typedef Uint32 tVAddr;
-typedef void (*tThreadFunction)(void*);
-
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 {
Uint Resvd4[1]; // SS
} tSyscallRegs;
-typedef struct {
- Uint16 LimitLow;
- Uint16 BaseLow;
- Uint8 BaseMid;
- Uint8 Access;
- struct {
- unsigned LimitHi: 4;
- unsigned Flags: 4;
- } __attribute__ ((packed));
- Uint8 BaseHi;
-} __attribute__ ((packed)) tGDT;
-
typedef struct {
#if USE_PAE
Uint PDPT[4];
typedef struct {
Uint EIP, ESP, EBP;
+ Uint32 UserCS, UserEIP;
} tTaskState;
-// --- Interface Flags & Macros
-#define CLONE_VM 0x10
+// === 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_)