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 16:22:27 +01:00
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#ifndef _I386_TYPES_H
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#define _I386_TYPES_H
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#include <minix/sys_config.h>
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#include "archconst.h"
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typedef unsigned reg_t; /* machine register */
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typedef reg_t segdesc_t;
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/* The stack frame layout is determined by the software, but for efficiency
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* it is laid out so the assembly code to use it is as simple as possible.
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* 80286 protected mode and all real modes use the same frame, built with
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* 16-bit registers. Real mode lacks an automatic stack switch, so little
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* is lost by using the 286 frame for it. The 386 frame differs only in
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* having 32-bit registers and more segment registers. The same names are
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* used for the larger registers to avoid differences in the code.
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*/
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struct stackframe_s { /* proc_ptr points here */
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u16_t gs; /* last item pushed by save */
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u16_t fs; /* ^ */
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u16_t es; /* | */
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u16_t ds; /* | */
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reg_t di; /* di through cx are not accessed in C */
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reg_t si; /* order is to match pusha/popa */
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reg_t fp; /* bp */
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reg_t st; /* hole for another copy of sp */
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reg_t bx; /* | */
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reg_t dx; /* | */
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reg_t cx; /* | */
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reg_t retreg; /* ax and above are all pushed by save */
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reg_t retadr; /* return address for assembly code save() */
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reg_t pc; /* ^ last item pushed by interrupt */
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reg_t cs; /* | */
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reg_t psw; /* | */
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reg_t sp; /* | */
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reg_t ss; /* these are pushed by CPU during interrupt */
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};
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struct segdesc_s { /* segment descriptor for protected mode */
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u16_t limit_low;
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u16_t base_low;
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u8_t base_middle;
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u8_t access; /* |P|DL|1|X|E|R|A| */
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u8_t granularity; /* |G|X|0|A|LIMT| */
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u8_t base_high;
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};
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#define LDT_SIZE (2 + NR_REMOTE_SEGS) /* CS, DS and remote segments */
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/* Fixed local descriptors. */
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#define CS_LDT_INDEX 0 /* process CS */
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#define DS_LDT_INDEX 1 /* process DS=ES=FS=GS=SS */
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#define EXTRA_LDT_INDEX 2 /* first of the extra LDT entries */
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typedef struct segframe {
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reg_t p_ldt_sel; /* selector in gdt with ldt base and limit */
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2008-11-19 13:26:10 +01:00
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reg_t p_cr3; /* page table root */
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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 16:22:27 +01:00
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struct segdesc_s p_ldt[2+NR_REMOTE_SEGS]; /* CS, DS and remote */
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} segframe_t;
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2008-11-19 13:26:10 +01:00
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/* Page fault event. Stored in process table. Only valid if PAGEFAULT
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* set in p_rts_flags.
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*/
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struct pagefault
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{
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u32_t pf_virtual; /* Address causing fault (CR2). */
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u32_t pf_flags; /* Pagefault flags on stack. */
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};
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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 16:22:27 +01:00
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#endif /* #ifndef _I386_TYPES_H */
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