| 1 | /* The kernel call implemented in this file:
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| 2 | * m_type: SYS_NEWMAP
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| 3 | *
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| 4 | * The parameters for this kernel call are:
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| 5 | * m1_i1: PR_ENDPT (install new map for this process)
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| 6 | * m1_p1: PR_MEM_PTR (pointer to the new memory map)
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| 7 | */
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| 8 | #include "../system.h"
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| 9 | #include <minix/endpoint.h>
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| 10 |
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| 11 | #if USE_NEWMAP
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| 12 |
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| 13 | /*===========================================================================*
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| 14 | * do_newmap *
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| 15 | *===========================================================================*/
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| 16 | PUBLIC int do_newmap(m_ptr)
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| 17 | message *m_ptr; /* pointer to request message */
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| 18 | {
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| 19 | /* Handle sys_newmap(). Fetch the memory map from PM. */
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| 20 | register struct proc *rp; /* process whose map is to be loaded */
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| 21 | struct mem_map *map_ptr; /* virtual address of map inside caller (PM) */
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| 22 | phys_bytes src_phys; /* physical address of map at the PM */
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| 23 | int old_flags; /* value of flags before modification */
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| 24 | int proc;
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| 25 |
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| 26 | map_ptr = (struct mem_map *) m_ptr->PR_MEM_PTR;
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| 27 | if (! isokendpt(m_ptr->PR_ENDPT, &proc)) return(EINVAL);
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| 28 | if (iskerneln(proc)) return(EPERM);
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| 29 | rp = proc_addr(proc);
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| 30 |
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| 31 | /* Copy the map from PM. */
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| 32 | src_phys = umap_local(proc_addr(who_p), D, (vir_bytes) map_ptr,
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| 33 | sizeof(rp->p_memmap));
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| 34 | if (src_phys == 0) return(EFAULT);
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| 35 | phys_copy(src_phys,vir2phys(rp->p_memmap),(phys_bytes)sizeof(rp->p_memmap));
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| 36 |
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| 37 | #if (CHIP != M68000)
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| 38 | alloc_segments(rp);
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| 39 | #else
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| 40 | pmmu_init_proc(rp);
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| 41 | #endif
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| 42 | old_flags = rp->p_rts_flags; /* save the previous value of the flags */
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| 43 | rp->p_rts_flags &= ~NO_MAP;
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| 44 | if (old_flags != 0 && rp->p_rts_flags == 0) lock_enqueue(rp);
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| 45 |
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| 46 | return(OK);
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| 47 | }
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| 48 | #endif /* USE_NEWMAP */
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| 49 |
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