2009-07-03 07:17:11 +08:00
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/*
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* File : hdisr.S
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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*/
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/**
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* @addtogroup I386
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*/
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/*@{*/
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#define ENTRY(proc)\
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.align 2;\
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.globl proc;\
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.type proc,@function;\
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proc:
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#define HDINTERRUPTFNC(name,num) \
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ENTRY(name)\
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pushl $(num);\
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jmp _hdinterrupts;\
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.data;\
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.long name;\
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.text
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.globl hdinterrupt_func
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.data
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.align 4
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.type hdinterrupt_func,@object
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hdinterrupt_func :
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.text
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/* the external device interrupts */
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HDINTERRUPTFNC(irq0, 0)
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HDINTERRUPTFNC(irq1, 1)
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HDINTERRUPTFNC(irq2, 2)
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HDINTERRUPTFNC(irq3, 3)
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HDINTERRUPTFNC(irq4, 4)
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HDINTERRUPTFNC(irq5, 5)
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HDINTERRUPTFNC(irq6, 6)
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HDINTERRUPTFNC(irq7, 7)
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HDINTERRUPTFNC(irq8, 8)
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HDINTERRUPTFNC(irq9, 9)
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HDINTERRUPTFNC(irq10, 10)
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HDINTERRUPTFNC(irq11, 11)
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HDINTERRUPTFNC(irq12, 12)
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HDINTERRUPTFNC(irq13, 13)
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HDINTERRUPTFNC(irq14, 14)
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HDINTERRUPTFNC(irq15, 15)
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.p2align 4,0x90
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.globl _hdinterrupts
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.type _hdinterrupts,@function
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.globl rt_interrupt_enter
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.globl rt_interrupt_leave
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.globl isr_table
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2011-09-19 12:40:50 +08:00
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.globl rt_thread_switch_interrupt_flag
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2009-07-03 07:17:11 +08:00
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.globl rt_interrupt_from_thread
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.globl rt_interrupt_to_thread
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_hdinterrupts:
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push %ds
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push %es
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pushal
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movw $0x10, %ax
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movw %ax, %ds
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movw %ax, %es
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pushl %esp
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call rt_interrupt_enter
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movl %esp, %eax /* get irqno */
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addl $0x2c, %eax
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movl (%eax), %eax /* each item takes up 4bytes in isr_table,equl to isr_table[irqno] */
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shll $0x2, %eax
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movl $isr_table, %ebx
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addl %eax,%ebx
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call *(%ebx)
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call rt_interrupt_leave
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2011-09-19 12:40:50 +08:00
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/* if rt_thread_switch_interrupt_flag set, jump to _interrupt_thread_switch and don't return */
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movl $rt_thread_switch_interrupt_flag, %eax
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2009-07-03 07:17:11 +08:00
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movl (%eax), %ebx
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cmp $0x1, %ebx
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jz _interrupt_thread_switch
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popl %esp
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popal
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pop %es
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pop %ds
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add $4,%esp
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iret
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_interrupt_thread_switch:
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popl %esp
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movl $0x0, %ebx
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movl %ebx, (%eax)
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movl $rt_interrupt_from_thread, %eax
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movl (%eax), %ebx
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movl %esp, (%ebx)
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movl $rt_interrupt_to_thread, %ecx
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movl (%ecx), %edx
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movl (%edx), %esp
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popal
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pop %es
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pop %ds
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add $4,%esp
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iret
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/*@}*/
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