minix/kernel/system/do_newmap.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

61 lines
2 KiB
C

/* The kernel call implemented in this file:
* m_type: SYS_NEWMAP
*
* The parameters for this kernel call are:
* m1_i1: PR_ENDPT (install new map for this process)
* m1_p1: PR_MEM_PTR (pointer to the new memory map)
*/
#include "../system.h"
#include <minix/endpoint.h>
#if USE_NEWMAP
/*===========================================================================*
* do_newmap *
*===========================================================================*/
PUBLIC int do_newmap(m_ptr)
message *m_ptr; /* pointer to request message */
{
/* Handle sys_newmap(). Fetch the memory map from PM. */
register struct proc *rp; /* process whose map is to be loaded */
struct mem_map *map_ptr; /* virtual address of map inside caller (PM) */
phys_bytes src_phys; /* physical address of map at the PM */
int old_flags; /* value of flags before modification */
int proc;
map_ptr = (struct mem_map *) m_ptr->PR_MEM_PTR;
if (! isokendpt(m_ptr->PR_ENDPT, &proc)) return(EINVAL);
if (iskerneln(proc)) return(EPERM);
rp = proc_addr(proc);
return newmap(rp, map_ptr);
}
/*===========================================================================*
* newmap *
*===========================================================================*/
PUBLIC int newmap(rp, map_ptr)
struct proc *rp; /* process whose map is to be loaded */
struct mem_map *map_ptr; /* virtual address of map inside caller (PM) */
{
/* Fetch the memory map from PM. */
phys_bytes src_phys; /* physical address of map at the PM */
int old_flags; /* value of flags before modification */
int proc;
/* Copy the map from PM. */
src_phys = umap_local(proc_addr(who_p), D, (vir_bytes) map_ptr,
sizeof(rp->p_memmap));
if (src_phys == 0) return(EFAULT);
phys_copy(src_phys,vir2phys(rp->p_memmap),
(phys_bytes)sizeof(rp->p_memmap));
alloc_segments(rp);
old_flags = rp->p_rts_flags; /* save the previous value of the flags */
if (old_flags != 0 && rp->p_rts_flags == 0) lock_enqueue(rp);
return(OK);
}
#endif /* USE_NEWMAP */