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94 lines
2.0 KiB
Plaintext
94 lines
2.0 KiB
Plaintext
#pypp 0
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#ifndef _KERNEL_HH
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#define _KERNEL_HH
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#ifndef EXTERN
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#define EXTERN extern
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#endif
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#define NULL 0
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struct Object_base
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struct Object
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struct Page
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struct Thread
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struct Memory
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#include "arch.hh"
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struct Object_base:
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// Next and previous object of any type in the same page.
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Object *prev_obj, *next_obj
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void free_obj (Memory *parent)
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inline bool is_free ()
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template <typename _T> struct Object : public Object_base:
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// Next and previous object of the same type in any page.
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_T *prev, *next
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void free (Memory *parent, _T *&first)
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struct Free : public Object <Free>
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// This marker is ~0. No other kernel structure may allow this value
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// at this point. It is used to recognize free chunks.
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unsigned marker
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bool Object_base::is_free ():
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return ((Free *)this)->marker == ~0
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struct Page : public Object <Page>:
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void *physical
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struct Thread : public Object <Thread>:
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Memory *address_space
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unsigned pc, sp
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Thread_arch arch
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Thread *schedule_prev, *schedule_next
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struct Memory : public Object <Memory>:
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Free *frees
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Page *pages
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Thread *threads
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Memory *memories
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unsigned limit, used
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Memory_arch arch
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// Allocation of pages.
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void *palloc ()
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void *zalloc ()
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void pfree (void *page)
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void zfree (void *page)
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// Allocation routines for kernel structures
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void *search_free (unsigned size, void *&first)
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Page *alloc_page ()
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Thread *alloc_thread ()
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Memory *alloc_memory ()
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// Functions which can be called from assembly must not be mangled.
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extern "C":
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// Panic. n is sent over caps led. message is currently ignored.
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void panic (unsigned n, char const *message)
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// Debug: switch caps led
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void led (bool on, bool tick)
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struct FreePage:
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FreePage *next
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EXTERN FreePage *zero_pages, *junk_pages
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EXTERN Memory top_memory
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EXTERN Thread *sleepers, *runners
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EXTERN Thread idle
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EXTERN Memory idle_memory
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EXTERN Page idle_page
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template <typename _T> void Object <_T>::free (Memory *parent, _T *&first):
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if prev:
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prev->next = next
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else:
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first = next
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if next:
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next->prev = prev
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free_obj (parent)
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#endif
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