| 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_PROC_NR (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 |
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| 10 | #if USE_NEWMAP
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| 11 |
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| 12 | /*===========================================================================*
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| 13 | * do_newmap *
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| 14 | *===========================================================================*/
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| 15 | PUBLIC int do_newmap(m_ptr)
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| 16 | message *m_ptr; /* pointer to request message */
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| 17 | {
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| 18 | /* Handle sys_newmap(). Fetch the memory map from PM. */
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| 19 | register struct proc *rp; /* process whose map is to be loaded */
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| 20 | int caller; /* whose space has the new map (usually PM) */
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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 |
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| 25 | /* Extract message parameters and copy new memory map from PM. */
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| 26 | caller = m_ptr->m_source;
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| 27 | map_ptr = (struct mem_map *) m_ptr->PR_MEM_PTR;
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| 28 | if (! isokprocn(m_ptr->PR_PROC_NR)) return(EINVAL);
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| 29 | if (iskerneln(m_ptr->PR_PROC_NR)) return(EPERM);
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| 30 | rp = proc_addr(m_ptr->PR_PROC_NR);
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| 31 |
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| 32 | /* Copy the map from PM. */
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| 33 | src_phys = umap_local(proc_addr(caller), D, (vir_bytes) map_ptr,
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| 34 | sizeof(rp->p_memmap));
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| 35 | if (src_phys == 0) return(EFAULT);
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| 36 | phys_copy(src_phys,vir2phys(rp->p_memmap),(phys_bytes)sizeof(rp->p_memmap));
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| 37 |
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| 38 | #if (CHIP != M68000)
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| 39 | alloc_segments(rp);
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| 40 | #else
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| 41 | pmmu_init_proc(rp);
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| 42 | #endif
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| 43 | old_flags = rp->p_rts_flags; /* save the previous value of the flags */
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| 44 | rp->p_rts_flags &= ~NO_MAP;
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| 45 | if (old_flags != 0 && rp->p_rts_flags == 0) lock_enqueue(rp);
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| 46 |
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| 47 | return(OK);
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| 48 | }
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| 49 | #endif /* USE_NEWMAP */
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| 50 |
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