Commit MD parts of a loosely functional AMD64 port. This is based on

a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to
attempt to get a stable base to start from.  There is a lot missing still.
Worth noting:
- The kernel runs at 1GB in order to cheat with the pmap code.  pmap uses
  a variation of the PAE code in order to avoid having to worry about 4
  levels of page tables yet.
- It boots in 64 bit "long mode" with a tiny trampoline embedded in the
  i386 loader.  This simplifies locore.s greatly.
- There are still quite a few fragments of i386-specific code that have
  not been translated yet, and some that I cheated and wrote dumb C
  versions of (bcopy etc).
- It has both int 0x80 for syscalls (but using registers for argument
  passing, as is native on the amd64 ABI), and the 'syscall' instruction
  for syscalls.  int 0x80 preserves all registers, 'syscall' does not.
- I have tried to minimize looking at the NetBSD code, except in a couple
  of places (eg: to find which register they use to replace the trashed
  %rcx register in the syscall instruction).  As a result, there is not a
  lot of similarity.  I did look at NetBSD a few times while debugging to
  get some ideas about what I might have done wrong in my first attempt.

1 files changed, 2 insertions, 49 deletions

diff --git a/sys/amd64/include/md_var.h b/sys/amd64/include/md_var.h
index bf3eca4..c5f0e458 100644
--- a/sys/amd64/include/md_var.h
+++ b/sys/amd64/include/md_var.h
@@ -36,11 +36,6 @@
  * Miscellaneous machine-dependent declarations.
  */
 
-extern	void	(*bcopy_vector)(const void *from, void *to, size_t len);
-extern	void	(*bzero_vector)(void *buf, size_t len);
-extern	int	(*copyin_vector)(const void *udaddr, void *kaddr, size_t len);
-extern	int	(*copyout_vector)(const void *kaddr, void *udaddr, size_t len);
-
 extern	long	Maxmem;
 extern	u_int	atdevbase;	/* offset in virtual memory of ISA io mem */
 extern	int	busdma_swi_pending;
@@ -51,37 +46,10 @@ extern	u_int	cpu_high;
 extern	u_int	cpu_id;
 extern	u_int	cpu_procinfo;
 extern	char	cpu_vendor[];
-extern	u_int	cyrix_did;
 extern	uint16_t *elan_mmcr;
 extern	char	kstack[];
-#ifdef PC98
-extern	int	need_pre_dma_flush;
-extern	int	need_post_dma_flush;
-#endif
 extern	char	sigcode[];
 extern	int	szsigcode;
-#ifdef COMPAT_FREEBSD4
-extern	int	szfreebsd4_sigcode;
-#endif
-#ifdef COMPAT_43
-extern	int	szosigcode;
-#endif
-#ifdef SWTCH_OPTIM_STATS
-extern int stupid_switch;
-extern int swtch_optim_stats;
-extern int tlb_flush_count;
-extern int lazy_flush_count;
-extern int lazy_flush_fixup;
-#ifdef SMP
-extern int lazy_flush_smpfixup;
-extern int lazy_flush_smpipi;
-extern int lazy_flush_smpbadcr3;
-extern int lazy_flush_smpmiss;
-#endif
-#endif
-#ifdef LAZY_SWITCH
-extern int lazy_flush_enable;
-#endif
 
 typedef void alias_for_inthand_t(u_int cs, u_int ef, u_int esp, u_int ss);
 struct	thread;
@@ -94,28 +62,13 @@ void	busdma_swi(void);
 void	cpu_halt(void);
 void	cpu_reset(void);
 void	cpu_setregs(void);
-void	cpu_switch_load_gs(void) __asm(__STRING(cpu_switch_load_gs));
 void	doreti_iret(void) __asm(__STRING(doreti_iret));
 void	doreti_iret_fault(void) __asm(__STRING(doreti_iret_fault));
-void	doreti_popl_ds(void) __asm(__STRING(doreti_popl_ds));
-void	doreti_popl_ds_fault(void) __asm(__STRING(doreti_popl_ds_fault));
-void	doreti_popl_es(void) __asm(__STRING(doreti_popl_es));
-void	doreti_popl_es_fault(void) __asm(__STRING(doreti_popl_es_fault));
-void	doreti_popl_fs(void) __asm(__STRING(doreti_popl_fs));
-void	doreti_popl_fs_fault(void) __asm(__STRING(doreti_popl_fs_fault));
 void	enable_sse(void);
 void	fillw(int /*u_short*/ pat, void *base, size_t cnt);
-void	i486_bzero(void *buf, size_t len);
-void	i586_bcopy(const void *from, void *to, size_t len);
-void	i586_bzero(void *buf, size_t len);
-int	i586_copyin(const void *udaddr, void *kaddr, size_t len);
-int	i586_copyout(const void *kaddr, void *udaddr, size_t len);
-void	i686_pagezero(void *addr);
-void	init_AMD_Elan_sc520(void);
+void	pagezero(void *addr);
 int	is_physical_memory(vm_offset_t addr);
-vm_paddr_t kvtop(void *addr);
-void	setidt(int idx, alias_for_inthand_t *func, int typ, int dpl, int selec);
+void	setidt(int idx, alias_for_inthand_t *func, int typ, int dpl, int ist);
 void	swi_vm(void *);
-int     user_dbreg_trap(void);
 
 #endif /* !_MACHINE_MD_VAR_H_ */