rom/kernel/kernel_base.h

   1 #ifndef KERNEL_BASE_H
   2 #define KERNEL_BASE_H
   3
   4 /*
   5     Copyright © 1995-2017, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     Desc:
   9 */
  10
  11 #ifndef __KERNEL_NOLIBBASE__
  12 #define __KERNEL_NOLIBBASE__
  13 #endif /* __KERNEL_NOLIBBASE__ */
  14
  15 #include <exec/execbase.h>
  16 #include <exec/memory.h>
  17 #include <exec/semaphores.h>
  18 #include <aros/kernel.h>
  19
  20 /* Early declaration for ictl functions */
  21 struct KernelBase;
  22
  23 /* These two specify IRQ_COUNT and EXCEPTIONS_COUNT */
  24 #include <kernel_arch.h>
  25 #include <kernel_cpu.h>
  26
  27 /* Declare global variable at absolute address */
  28 #define IMPORT_GLOBAL(var, addr) \
  29     asm(".globl " # var "\n"     \
  30         ".set " # var ", " # addr )
  31
  32 /* Platform-specific stuff. Black box here. */
  33 struct PlatformData;
  34
  35 #ifndef HW_IRQ_COUNT
  36 #ifdef HW_IRQ_BASE
  37 #define HW_IRQ_COUNT    (256 - INTB_KERNEL - HW_IRQ_BASE)
  38 #else
  39 #define HW_IRQ_COUNT    (256 - INTB_KERNEL)
  40 #endif
  41 #endif /* !HW_IRQ_COUNT */
  42 #ifndef KBL_INTERNAL
  43 #define KBL_INTERNAL    0
  44 #endif /* !KBL_INTERNAL */
  45
  46 #ifdef KERNELIRQ_NEEDSPRIVATE
  47 struct KernelInt
  48 {
  49     IPTR        ki_Priv;                        /* arch specific per-irq data */
  50     struct List ki_List;
  51 };
  52 #define KERNELIRQ_LIST(x)       KernelBase->kb_Interrupts[x].ki_List
  53 #else
  54 #define KernelInt List
  55 #define KERNELIRQ_LIST(x)       KernelBase->kb_Interrupts[x]
  56 #endif
  57
  58 /* kernel.resource base. Nothing spectacular, really. */
  59 struct KernelBase
  60 {
  61     struct Node         kb_Node;
  62 #ifdef KERNELIRQ_NEEDSCONTROLLERS
  63     struct List         kb_ICList;              /* list of all controller types */
  64     struct List         kb_InterruptMappings;
  65 #endif
  66     struct MinList      kb_Exceptions[EXCEPTIONS_COUNT];
  67     struct KernelInt    kb_Interrupts[HW_IRQ_COUNT];
  68     ULONG               kb_ContextFlags;        /* Hints for KrnCreateContext() */
  69     ULONG               kb_ContextSize; /* Total length of CPU context  */
  70     ULONG               kb_PageSize;            /* Physical memory page size    */
  71     struct PlatformData *kb_PlatformData;
  72 #ifdef KERNELIRQ_NEEDSCONTROLLERS
  73     UBYTE               kb_ICTypeBase;          /* used to set IC controller ID's */
  74 #endif
  75 };
  76
  77 /*
  78  * Some useful global variables. They are global because:
  79  * - BootMsg needs to be stored before KernelBase is allocated;
  80  * - KernelBase is needed by interrupt handling code
  81  */
  82 extern struct TagItem *BootMsg;
  83 extern struct KernelBase *KernelBase;
  84
  85 /* Allocation function */
  86 struct KernelBase *AllocKernelBase(struct ExecBase *SysBase);
  87
  88 /* Utility function to clear BSS segments. Call it before storing any globals!!! */
  89 void __clear_bss(const struct KernelBSS *bss);
  90
  91 /* Memory header initialization functions */
  92 void krnCreateMemHeader(CONST_STRPTR name, BYTE pri, APTR start, IPTR size, ULONG flags);
  93 struct MemHeader *krnCreateROMHeader(CONST_STRPTR name, APTR start, APTR end);
  94 /* Memhry header - TLSF support functions */
  95 void krnCreateTLSFMemHeader(CONST_STRPTR name, BYTE pri, APTR start, IPTR size, ULONG flags);
  96 struct MemHeader * krnConvertMemHeaderToTLSF(struct MemHeader * source);
  97
  98 #ifdef KERNELIRQ_NEEDSCONTROLLERS
  99 #include <kernel_interruptcontrollers.h>
 100 #endif
 101
 102 #endif /* !KERNEL_BASE_H */