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