6f77685609
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
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_UMAP
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*
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* The parameters for this kernel call are:
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* m5_i1: CP_SRC_PROC_NR (process number)
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* m5_c1: CP_SRC_SPACE (segment where address is: T, D, or S)
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* m5_l1: CP_SRC_ADDR (virtual address)
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* m5_l2: CP_DST_ADDR (returns physical address)
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* m5_l3: CP_NR_BYTES (size of datastructure)
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*/
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#include "../system.h"
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#if USE_UMAP
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/*==========================================================================*
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* do_umap *
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*==========================================================================*/
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PUBLIC int do_umap(m_ptr)
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register message *m_ptr; /* pointer to request message */
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{
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/* Map virtual address to physical, for non-kernel processes. */
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int seg_type = m_ptr->CP_SRC_SPACE & SEGMENT_TYPE;
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int seg_index = m_ptr->CP_SRC_SPACE & SEGMENT_INDEX;
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vir_bytes offset = m_ptr->CP_SRC_ADDR;
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int count = m_ptr->CP_NR_BYTES;
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int endpt = (int) m_ptr->CP_SRC_ENDPT;
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int proc_nr;
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phys_bytes phys_addr;
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/* Verify process number. */
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if (endpt == SELF)
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proc_nr = who_p;
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else
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if (! isokendpt(endpt, &proc_nr))
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return(EINVAL);
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/* See which mapping should be made. */
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switch(seg_type) {
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case LOCAL_SEG:
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phys_addr = umap_local(proc_addr(proc_nr), seg_index, offset, count);
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break;
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case REMOTE_SEG:
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phys_addr = umap_remote(proc_addr(proc_nr), seg_index, offset, count);
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break;
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#if _MINIX_CHIP == _CHIP_INTEL
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case BIOS_SEG:
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phys_addr = umap_bios(proc_addr(proc_nr), offset, count);
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break;
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#endif
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case GRANT_SEG:
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phys_addr = umap_grant(proc_addr(proc_nr), offset, count);
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break;
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default:
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return(EINVAL);
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}
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m_ptr->CP_DST_ADDR = phys_addr;
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return (phys_addr == 0) ? EFAULT: OK;
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}
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#endif /* USE_UMAP */
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