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Rev 534 Rev 576
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#include <arch/pm.h>
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#include <arch/pm.h>
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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <arch/cpuid.h>
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#include <arch/cpuid.h>
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#include <arch.h>
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#include <arch.h>
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#include <time/delay.h>
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#include <time/delay.h>
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#include <interrupt.h>
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/*
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/*
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 * i8254 chip driver.
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 * i8254 chip driver.
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 * Low level time functions.
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 * Low level time functions.
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 */
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 */
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#define CLK_CONST   1193180
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#define CLK_CONST   1193180
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#define MAGIC_NUMBER    1194
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#define MAGIC_NUMBER    1194
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static void i8254_interrupt(int n, void *stack);
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void i8254_init(void)
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void i8254_init(void)
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{
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{
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    i8254_normal_operation();
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    i8254_normal_operation();
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}
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}
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    outb(CLK_PORT4, 0x36);
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    outb(CLK_PORT4, 0x36);
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    pic_disable_irqs(1<<IRQ_CLK);
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    pic_disable_irqs(1<<IRQ_CLK);
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    outb(CLK_PORT1, (CLK_CONST/HZ) & 0xf);
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    outb(CLK_PORT1, (CLK_CONST/HZ) & 0xf);
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    outb(CLK_PORT1, (CLK_CONST/HZ) >> 8);
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    outb(CLK_PORT1, (CLK_CONST/HZ) >> 8);
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    pic_enable_irqs(1<<IRQ_CLK);
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    pic_enable_irqs(1<<IRQ_CLK);
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    trap_register(VECTOR_CLK, i8254_interrupt);
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    exc_register(VECTOR_CLK, "i8254_clock", i8254_interrupt);
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}
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}
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#define LOOPS 150000
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#define LOOPS 150000
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#define SHIFT 11
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#define SHIFT 11
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void i8254_calibrate_delay_loop(void)
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void i8254_calibrate_delay_loop(void)
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    CPU->frequency_mhz = (clk2-clk1)>>SHIFT;
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    CPU->frequency_mhz = (clk2-clk1)>>SHIFT;
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    return;
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    return;
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}
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}
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void i8254_interrupt(__u8 n, __native stack[])
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void i8254_interrupt(int n, void *stack)
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{
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{
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    trap_virtual_eoi();
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    trap_virtual_eoi();
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    clock();
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    clock();
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}
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}