minix/kernel/system/do_vm.c
Ben Gras 6f77685609 Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.

 . kernel does not program the interrupt controller directly, do any
   other architecture-dependent operations, or contain assembly any more,
   but uses architecture-dependent functions in arch/$(ARCH)/.
 . architecture-dependent constants and types defined in arch/$(ARCH)/include.
 . <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
   architecture-independent functions.
 . int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
   and live in arch/i386/do_* now.
 . i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
   gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
   If 86 support is to return, it should be a new architecture.
 . prototypes for the architecture-dependent functions defined in
   kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
 . /etc/make.conf included in makefiles and shell scripts that need to
   know the building architecture; it defines ARCH=<arch>, currently only
   i386.
 . some basic per-architecture build support outside of the kernel (lib)
 . in clock.c, only dequeue a process if it was ready
 . fixes for new include files

files deleted:
 . mpx/klib.s - only for choosing between mpx/klib86 and -386
 . klib86.s - only for 86

i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
 . mpx386.s (entry point)
 . klib386.s
 . sconst.h
 . exception.c
 . protect.c
 . protect.h
 . i8269.c
2006-12-22 15:22:27 +00:00

83 lines
1.9 KiB
C

/* The system call implemented in this file:
* m_type: SYS_VM_MAP
*
* The parameters for this system call are:
* m4_l1: Process that requests map (VM_MAP_ENDPT)
* m4_l2: Map (TRUE) or unmap (FALSE) (VM_MAP_MAPUNMAP)
* m4_l3: Base address (VM_MAP_BASE)
* m4_l4: Size (VM_MAP_SIZE)
* m4_l5: address (VM_MAP_ADDR)
*/
#include "../system.h"
PRIVATE int vm_needs_init= 1;
#include <sys/vm.h>
/*===========================================================================*
* do_vm_map *
*===========================================================================*/
PUBLIC int do_vm_map(m_ptr)
message *m_ptr; /* pointer to request message */
{
int proc_nr, do_map;
phys_bytes base, size, offset, p_phys;
struct proc *pp;
/* do_serial_debug= 1; */
if (vm_needs_init)
{
vm_needs_init= 0;
vm_init();
}
if (m_ptr->VM_MAP_ENDPT == SELF) {
proc_nr = who_p;
} else {
if(!isokendpt(m_ptr->VM_MAP_ENDPT, &proc_nr))
return EINVAL;
}
do_map= m_ptr->VM_MAP_MAPUNMAP;
base= m_ptr->VM_MAP_BASE;
size= m_ptr->VM_MAP_SIZE;
offset= m_ptr->VM_MAP_ADDR;
pp= proc_addr(proc_nr);
p_phys= umap_local(pp, D, base, size);
if (p_phys == 0)
return EFAULT;
if (do_map)
{
pp->p_misc_flags |= MF_VM;
vm_map_range(p_phys, size, offset);
}
else
{
vm_map_range(p_phys, size, p_phys);
}
return OK;
}
/*===========================================================================*
* vm_map_default *
*===========================================================================*/
PUBLIC void vm_map_default(pp)
struct proc *pp;
{
phys_bytes base_clicks, size_clicks;
if (vm_needs_init)
panic("vm_map_default: VM not initialized?", NO_NUM);
pp->p_misc_flags &= ~MF_VM;
base_clicks= pp->p_memmap[D].mem_phys;
size_clicks= pp->p_memmap[S].mem_phys+pp->p_memmap[S].mem_len -
base_clicks;
vm_map_range(base_clicks << CLICK_SHIFT,
size_clicks << CLICK_SHIFT, base_clicks << CLICK_SHIFT);
}