arch/i386-pc/include/asm/irq.h

   1 #ifndef ASM_IRQ_H
   2 #define ASM_IRQ_H
   3
   4 /*
   5     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     Desc: Interrupt core, part of kernel.resource
   9     Lang: english
  10 */
  11
  12 #include <asm/segments.h>
  13 #include <asm/linkage.h>
  14 #include <asm/ptrace.h>
  15
  16 /* interrupt control.. */
  17
  18 #define __sti() __asm__ __volatile__ ("sti": : :"memory")
  19 #define __cli() __asm__ __volatile__ ("cli": : :"memory")
  20
  21 /*********************************************************************/
  22
  23 #define __STR(x) #x
  24 #define STR(x) __STR(x)
  25
  26 /*********************************************************************/
  27
  28 /*
  29  * This is standard macro used to save register frame on the supervisor
  30  * stack. Supposes that orig_eax is saved already.
  31  */
  32 #define SAVE_REGS               \
  33     "cld                \n\t"   \
  34     "pushl   %eax       \n\t"   \
  35     "pushl   %ecx       \n\t"   \
  36     "pushl   %edx       \n\t"   \
  37     "push    %ds        \n\t"   \
  38     "push    %es        \n\t"   \
  39     "movl    $"STR(KERNEL_DS)",%edx\n\t" \
  40     "mov     %dx,%ds    \n\t"   \
  41     "mov     %dx,%es    \n\t"
  42
  43 #define RESTORE_REGS            \
  44     "pop     %es        \n\t"   \
  45     "pop     %ds        \n\t"   \
  46     "popl    %edx       \n\t"   \
  47     "popl    %ecx       \n\t"   \
  48     "popl    %eax       \n\t"
  49
  50 #define R_es        0x00
  51 #define R_ds        0x04
  52 #define R_edx       0x08
  53 #define R_ecx       0x0c
  54 #define R_eax       0x10
  55 #define R_param     0x14
  56
  57 /*
  58     Save/restore all registers. These macros are used mostly inside Switch
  59     procedure.
  60 */
  61
  62 #define SAVE_ALL                \
  63     "cld                \n\t"   \
  64     "push    %es        \n\t"   \
  65     "push    %ds        \n\t"   \
  66     "pushl   %eax       \n\t"   \
  67     "pushl   %ebp       \n\t"   \
  68     "pushl   %edi       \n\t"   \
  69     "pushl   %esi       \n\t"   \
  70     "pushl   %edx       \n\t"   \
  71     "pushl   %ecx       \n\t"   \
  72     "pushl   %ebx       \n\t"   \
  73     "movl    $"STR(KERNEL_DS)",%edx \n\t"\
  74     "mov     %dx,%ds    \n\t"   \
  75     "mov     %dx,%es    \n\t"
  76
  77 #define RESTORE_ALL             \
  78     "popl    %ebx       \n\t"   \
  79     "popl    %ecx       \n\t"   \
  80     "popl    %edx       \n\t"   \
  81     "popl    %esi       \n\t"   \
  82     "popl    %edi       \n\t"   \
  83     "popl    %ebp       \n\t"   \
  84     "popl    %eax       \n\t"   \
  85     "pop     %ds        \n\t"   \
  86     "pop     %es        \n\t"
  87
  88 #define FIRST_EXT_VECTOR    0x20    /* This is exactly what Intel says about */
  89 #define SYSTEM_VECTOR       0x80    /* Vector callable from user mode */
  90
  91 #define NR_IRQS             16      /* Use all XT-PIC interrupts */
  92 #define NR_SYSCALLS         4
  93
  94 /*
  95  * Structure used to describe interrupt controler. Sufficient to describe
  96  * the low-level hardware
  97  */
  98
  99 struct irqController
 100 {
 101     const char  *ic_Name;                       /* Controller name */
 102     void        (*ic_startup)(unsigned int);    /* All functions here! */
 103     void        (*ic_shutdown)(unsigned int);
 104     void        (*ic_handle)(unsigned int, struct pt_regs *);
 105     void        (*ic_enable)(unsigned int);
 106     void        (*ic_disable)(unsigned int);
 107 };
 108
 109 struct irqServer
 110 {
 111     void        (*is_handler)(int, void *, struct pt_regs *);
 112     const char  *is_name;       /* Server name */
 113     void        *is_UserData;   /* Will be class data or similar */
 114 };
 115
 116 struct irqDescriptor
 117 {
 118     unsigned int            id_status;      /* IRQ status. See below for details */
 119     struct irqController    *id_handler;    /* how to do emable/disable */
 120     struct irqServer        *id_server;     /* Server pointer */
 121     unsigned int            id_depth;       /* Disable depth for nested IRQs */
 122     unsigned int            id_count;       /* IRQ counter */
 123     unsigned int id_unused[3];
 124 };
 125
 126 /* IRQ status */
 127
 128 #define IRQ_INPROGRESS   1  /* Handler active - DO NOT enter */
 129 #define IRQ_DISABLED     2  /* IRQ disabled - DO NOT enter */
 130 #define IRQ_PENDING      4  /* IRQ pending - replay on enable */
 131 #define IRQ_REPLAY       8  /* IRQ has been replayed but not acked yet */
 132 #define IRQ_AUTODETECT  16  /* IRQ is beeing autodetected */
 133 #define IRQ_WAITING     32  /* IRQ not seen yet - for autodetection */
 134
 135 #endif /* ASM_IRQ_H */