#ifndef _ARCH_H_
#define _ARCH_H_
-// - Memory Layout
-#define MM_USER_MIN 0x00200000
-#define USER_STACK_SZ 0x00010000
-#define USER_STACK_TOP 0x00800000
-#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
// - 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 PHYS_BITS 32
#endif
+#define __ASM__ __asm__ __volatile__
+
+#define LONGLOCK_NUM_THREADS 8
+
// === 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));
+struct sShortSpinlock {
+ volatile int Lock;
+ int IF;
+};
+/**
+ * \brief Determine if a short spinlock is locked
+ */
+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));
+ #else
+ if(Lock->IF) __ASM__ ("sti");
+ #endif
+}
+/**
+ * \brief Halt the CPU
+ */
#define HALT() __asm__ __volatile__ ("hlt")
+#define MAGIC_BREAK() __asm__ __volatile__ ("xchg %bx, %bx")
// === TYPES ===
typedef unsigned int Uint; // Unsigned machine native integer
typedef signed long long Sint64;
typedef Uint size_t;
-#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 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];
Uint EIP, ESP, EBP;
} tTaskState;
-// --- Interface Flags & Macros
-#define CLONE_VM 0x10
-
#endif // !defined(_ARCH_H_)