From 203882b7bbd4aacaf5c4e99be0cca17455690585 Mon Sep 17 00:00:00 2001 From: John Hodge Date: Sun, 13 Feb 2011 12:28:32 +0800 Subject: [PATCH] Working on x86_64 build --- Kernel/Makefile | 2 +- Kernel/Makefile.BuildNum.x86_64 | 2 +- Kernel/arch/x86_64/Makefile | 2 +- Kernel/arch/x86_64/include/arch.h | 4 +- Kernel/arch/x86_64/lib.c | 10 +- Kernel/arch/x86_64/main.c | 4 +- Kernel/arch/x86_64/time.c | 149 ++++++++++++++++++++++++++++++ 7 files changed, 164 insertions(+), 9 deletions(-) create mode 100644 Kernel/arch/x86_64/time.c diff --git a/Kernel/Makefile b/Kernel/Makefile index 83c12407..cf4b0771 100644 --- a/Kernel/Makefile +++ b/Kernel/Makefile @@ -16,7 +16,7 @@ MAKEDEP = $(CC) -M CPPFLAGS += -I./include -I./arch/$(ARCHDIR)/include -D_MODULE_NAME_=\"Kernel\" CPPFLAGS += -DARCH=$(ARCH) -DARCHDIR=$(ARCHDIR) -DKERNEL_VERSION=$(KERNEL_VERSION) -DBUILD_NUM=$(BUILD_NUM) -CFLAGS += -Wall -Werror -O3 -fno-stack-protector -fno-builtin -Wstrict-prototypes -g +CFLAGS += -Wall -Werror -fno-stack-protector -fno-builtin -Wstrict-prototypes -g ASFLAGS += -D ARCH=\"$(ARCH)\" -D ARCHDIR=\"$(ARCHDIR)\" LDFLAGS += -T arch/$(ARCHDIR)/link.ld -g diff --git a/Kernel/Makefile.BuildNum.x86_64 b/Kernel/Makefile.BuildNum.x86_64 index 205d26c1..379412ae 100644 --- a/Kernel/Makefile.BuildNum.x86_64 +++ b/Kernel/Makefile.BuildNum.x86_64 @@ -1 +1 @@ -BUILD_NUM = 225 +BUILD_NUM = 233 diff --git a/Kernel/arch/x86_64/Makefile b/Kernel/arch/x86_64/Makefile index d0d4f848..906b726f 100644 --- a/Kernel/arch/x86_64/Makefile +++ b/Kernel/arch/x86_64/Makefile @@ -23,7 +23,7 @@ endif A_OBJ := start32.ao start64.ao desctab.ao A_OBJ += main.o lib.o proc.o mm_virt.o mm_phys.o -A_OBJ += kernelpanic.o errors.o +A_OBJ += kernelpanic.o errors.o time.o A_OBJ += vm8086.o # rme.o diff --git a/Kernel/arch/x86_64/include/arch.h b/Kernel/arch/x86_64/include/arch.h index 038b6384..e43bd97c 100644 --- a/Kernel/arch/x86_64/include/arch.h +++ b/Kernel/arch/x86_64/include/arch.h @@ -10,8 +10,8 @@ #define KERNEL_BASE 0xFFFFFFFF##80000000 #define BITS 64 -#define STACKED_LOCKS 0 -#define LOCK_DISABLE_INTS 1 +#define STACKED_LOCKS 2 // 0: No, 1: Per-CPU, 2: Per-Thread +#define LOCK_DISABLE_INTS 0 #define INVLPTR ((void*)0x0FFFFFFFFFFFFFFFULL) diff --git a/Kernel/arch/x86_64/lib.c b/Kernel/arch/x86_64/lib.c index f20753bc..da9955c9 100644 --- a/Kernel/arch/x86_64/lib.c +++ b/Kernel/arch/x86_64/lib.c @@ -5,6 +5,7 @@ // === IMPORTS === extern int GetCPUNum(void); +extern void *Proc_GetCurThread(void); // === CODE === /** @@ -58,7 +59,7 @@ void SHORTLOCK(struct sShortSpinlock *Lock) #if LOCK_DISABLE_INTS // Save interrupt state and clear interrupts - __ASM__ ("pushf;\n\tpop %%rax\n\tcli" : "=a"(IF)); + __ASM__ ("pushf;\n\tpop %0" : "=r"(IF)); IF &= 0x200; // AND out all but the interrupt flag #endif @@ -85,16 +86,21 @@ void SHORTLOCK(struct sShortSpinlock *Lock) : "a"(0), "r"(cpu), "r"(&Lock->Lock) ); #elif STACKED_LOCKS == 2 - __ASM__("lock cmpxchgl %2, (%3)" + __ASM__("lock cmpxchgq %2, (%3)" : "=a"(v) : "a"(0), "r"(thread), "r"(&Lock->Lock) ); #else __ASM__("xchgl %0, (%2)":"=a"(v):"a"(1),"D"(&Lock->Lock)); #endif + + #if LOCK_DISABLE_INTS + if( v ) __ASM__("sti"); // Re-enable interrupts + #endif } #if LOCK_DISABLE_INTS + __ASM__("cli"); Lock->IF = IF; #endif } diff --git a/Kernel/arch/x86_64/main.c b/Kernel/arch/x86_64/main.c index 7d693680..4e6001d6 100644 --- a/Kernel/arch/x86_64/main.c +++ b/Kernel/arch/x86_64/main.c @@ -9,7 +9,7 @@ extern void Desctab_Init(void); extern void MM_InitVirt(void); extern void Heap_Install(void); extern void Threads_Init(void); -//extern void Time_Setup(void); +extern int Time_Setup(void); extern void System_Init(char *Commandline); extern void MM_InitPhys_Multiboot(tMBoot_Info *MBoot); @@ -55,7 +55,7 @@ void kmain(Uint MbMagic, void *MbInfoPtr) Log_Log("Arch", "Starting threading..."); Threads_Init(); - //Time_Setup(); + Time_Setup(); *(Uint16*)(0xB8000) = 0x1F00|'F'; Log_Log("Arch", "Starting VFS..."); diff --git a/Kernel/arch/x86_64/time.c b/Kernel/arch/x86_64/time.c new file mode 100644 index 00000000..ec1e19db --- /dev/null +++ b/Kernel/arch/x86_64/time.c @@ -0,0 +1,149 @@ +/* + * Acess2 Kernel + * Timekeeping + * arch/x86_64/time.c + */ +#include + +// === MACROS === +#define TIMER_QUANTUM 100 +// 2^(15-rate), 15: 1HZ, 5: 1024Hz, 2: 8192Hz +// (Max: 15, Min: 2) - 15 = 1Hz, 13 = 4Hz, 12 = 8Hz, 11 = 16Hz 10 = 32Hz, 2 = 8192Hz +//#define TIMER_RATE 10 // 32 Hz +//#define TIMER_RATE 12 // 8 Hz +#define TIMER_RATE 14 // 2Hz +//#define TIMER_RATE 15 // 1HZ +#define TIMER_FREQ (0x8000>>TIMER_RATE) //Hz +#define MS_PER_TICK_WHOLE (1000/(TIMER_FREQ)) +#define MS_PER_TICK_FRACT ((0x80000000*(1000%TIMER_FREQ))/TIMER_FREQ) + +// === IMPORTS === +extern volatile Sint64 giTimestamp; +extern volatile Uint64 giTicks; +extern volatile Uint64 giPartMiliseconds; +extern void Timer_CallTimers(void); + +// === GLOBALS === +volatile Uint64 giTime_TSCAtLastTick = 0; +volatile Uint64 giTime_TSCPerTick = 0; + +// === PROTOTYPES === +Sint64 now(void); + int Time_Setup(void); +void Time_Interrupt(int); +Uint64 Time_ReadTSC(void); + +// === CODE === +/** + * \fn Sint64 now() + * \brief Return the current timestamp + */ +Sint64 now(void) +{ + Uint64 tsc = Time_ReadTSC(); + tsc -= giTime_TSCAtLastTick; + tsc *= MS_PER_TICK_WHOLE; + if( giTime_TSCPerTick ) { + tsc /= giTime_TSCPerTick; + } + else + tsc = 0; + return giTimestamp + tsc; +} + +/** + * \fn int Time_Setup(void) + * \brief Sets the system time from the Realtime-Clock + */ +int Time_Setup(void) +{ + Uint8 val; + + Log_Log("Timer", "RTC Timer firing at %iHz (%i divisor), %i.0x%08x", + TIMER_FREQ, TIMER_RATE, MS_PER_TICK_WHOLE, MS_PER_TICK_FRACT); + + outb(0x70, inb(0x70)&0x7F); // Disable NMIs + __asm__ __volatile__ ("cli"); // Disable normal interrupts + + // Set IRQ8 firing rate + outb(0x70, 0x0A); // Set the index to register A + val = inb(0x71); // Get the current value of register A + outb(0x70, 0x0A); // Reset index to A + val &= 0xF0; + val |= TIMER_RATE; + outb(0x71, val); // Update the timer rate + + // Enable IRQ8 + outb(0x70, 0x0B); // Set the index to register B + val = inb(0x71); // Read the current value of register B + outb(0x70, 0x0B); // Set the index again (a read will reset the index to register D) + outb(0x71, val | 0x40); // Write the previous value or'd with 0x40. This turns on bit 6 of register D + + __asm__ __volatile__ ("sti"); // Re-enable normal interrupts + outb(0x70, inb(0x70)|0x80); // Re-enable NMIs + + // Install IRQ Handler + IRQ_AddHandler(8, Time_Interrupt); + + // Make sure the RTC actually fires + outb(0x70, 0x0C); // Select register C + inb(0x71); // Just throw away contents. + + return 0; +} + +/** + * \brief Called on the timekeeping IRQ + * \param irq IRQ number (unused) + */ +void Time_Interrupt(int irq) +{ + //Log("RTC Tick"); + Uint64 curTSC = Time_ReadTSC(); + + if( giTime_TSCAtLastTick ) + { + giTime_TSCPerTick = curTSC - giTime_TSCAtLastTick; + } + giTime_TSCAtLastTick = curTSC; + + giTicks ++; + giTimestamp += MS_PER_TICK_WHOLE; + giPartMiliseconds += MS_PER_TICK_FRACT; + if(giPartMiliseconds > 0x80000000) { + giTimestamp ++; + giPartMiliseconds -= 0x80000000; + } + + Timer_CallTimers(); + + // Make sure the RTC Fires again + outb(0x70, 0x0C); // Select register C + inb(0x71); // Just throw away contents. +} + +#if 0 +/** + * \fn void Time_TimerThread(void) + */ +void Time_TimerThread(void) +{ + Sint64 next; + Threads_SetName("TIMER"); + + next = giTimestamp + TIMER_QUANTUM; + for(;;) + { + while(giTimestamp < next) Threads_Yield(); + next = giTimestamp + TIMER_QUANTUM; + Timer_CallTimers(); + } +} +#endif + +Uint64 Time_ReadTSC(void) +{ + Uint32 a, d; + __asm__ __volatile__ ("rdtsc" : "=a" (a), "=d" (d)); + return ((Uint64)d << 32) | a; +} -- 2.20.1