KNF, and typo.
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maxv
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5996942f53
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4e73005cec
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@ -1,4 +1,4 @@
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/* $NetBSD: segments.h,v 1.24 2013/01/07 17:03:06 chs Exp $ */
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/* $NetBSD: segments.h,v 1.25 2016/08/21 11:48:59 maxv Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -95,17 +95,17 @@
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* Selectors
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*/
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#define ISPL(s) ((s) & SEL_RPL) /* what is the priority level of a selector */
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#define ISPL(s) ((s) & SEL_RPL) /* what is the priority level of a selector */
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#ifdef XEN
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#define SEL_KPL 3 /* kernel privilege level */
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#define SEL_XPL 0 /* Xen Hypervisor privilege level */
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#define SEL_KPL 3 /* kernel privilege level */
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#define SEL_XPL 0 /* Xen Hypervisor privilege level */
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#else
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#define SEL_KPL 0 /* kernel privilege level */
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#define SEL_KPL 0 /* kernel privilege level */
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#endif
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#define SEL_UPL 3 /* user privilege level */
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#define SEL_RPL 3 /* requester's privilege level mask */
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#define ISLDT(s) ((s) & SEL_LDT) /* is it local or global */
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#define SEL_LDT 4 /* local descriptor table */
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#define SEL_UPL 3 /* user privilege level */
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#define SEL_RPL 3 /* requester's privilege level mask */
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#define ISLDT(s) ((s) & SEL_LDT) /* is it local or global */
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#define SEL_LDT 4 /* local descriptor table */
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/* Dynamically allocated TSSs and LDTs start (byte offset) */
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#define SYSSEL_START (NGDT_MEM << 3)
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@ -120,24 +120,24 @@
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* The rest is 16-byte descriptors for TSS and LDT.
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*/
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#define IDXSEL(s) (((s) >> 3) & 0x1fff)
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#define IDXSEL(s) (((s) >> 3) & 0x1fff)
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#define IDXDYNSEL(s) ((((s) & ~SEL_RPL) - DYNSEL_START) >> 4)
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#define GSEL(s,r) (((s) << 3) | r)
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#define GSYSSEL(s,r) ((((s) << 4) + SYSSEL_START) | r)
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#define GSEL(s,r) (((s) << 3) | r)
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#define GSYSSEL(s,r) ((((s) << 4) + SYSSEL_START) | r)
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#define GDYNSEL(s,r) ((((s) << 4) + DYNSEL_START) | r | SEL_KPL)
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#define LSEL(s,r) ((s) | r | SEL_LDT)
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#define USERMODE(c, f) (ISPL(c) == SEL_UPL)
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#define USERMODE(c, f) (ISPL(c) == SEL_UPL)
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#ifdef XEN
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/*
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* As KPL == UPL, Xen emulate interrupt in kernel context by pushing
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* a fake CS with XPL privilege
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*/
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#define KERNELMODE(c, f) (ISPL(c) == SEL_XPL)
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#define KERNELMODE(c, f) (ISPL(c) == SEL_XPL)
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#else
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#define KERNELMODE(c, f) (ISPL(c) == SEL_KPL)
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#define KERNELMODE(c, f) (ISPL(c) == SEL_KPL)
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#endif
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#ifndef _LOCORE
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@ -150,35 +150,35 @@
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* Below is used for TSS and LDT.
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*/
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struct sys_segment_descriptor {
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/*BITFIELDTYPE*/ uint64_t sd_lolimit:16;/* segment extent (lsb) */
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/*BITFIELDTYPE*/ uint64_t sd_lobase:24;/* segment base address (lsb) */
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/*BITFIELDTYPE*/ uint64_t sd_type:5; /* segment type */
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/*BITFIELDTYPE*/ uint64_t sd_dpl:2; /* segment descriptor priority level */
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/*BITFIELDTYPE*/ uint64_t sd_p:1; /* segment descriptor present */
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/*BITFIELDTYPE*/ uint64_t sd_hilimit:4;/* segment extent (msb) */
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/*BITFIELDTYPE*/ uint64_t sd_xx1:3; /* avl, long and def32 (not used) */
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/*BITFIELDTYPE*/ uint64_t sd_gran:1; /* limit granularity (byte/page) */
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/*BITFIELDTYPE*/ uint64_t sd_hibase:40;/* segment base address (msb) */
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/*BITFIELDTYPE*/ uint64_t sd_xx2:8; /* reserved */
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/*BITFIELDTYPE*/ uint64_t sd_zero:5; /* must be zero */
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/*BITFIELDTYPE*/ uint64_t sd_xx3:19; /* reserved */
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uint64_t sd_lolimit:16; /* segment extent (lsb) */
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uint64_t sd_lobase:24; /* segment base address (lsb) */
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uint64_t sd_type:5; /* segment type */
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uint64_t sd_dpl:2; /* segment descriptor priority level */
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uint64_t sd_p:1; /* segment descriptor present */
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uint64_t sd_hilimit:4; /* segment extent (msb) */
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uint64_t sd_xx1:3; /* avl, long and def32 (not used) */
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uint64_t sd_gran:1; /* limit granularity (byte/page) */
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uint64_t sd_hibase:40; /* segment base address (msb) */
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uint64_t sd_xx2:8; /* reserved */
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uint64_t sd_zero:5; /* must be zero */
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uint64_t sd_xx3:19; /* reserved */
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} __packed;
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/*
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* Below is used for cs, ds, etc.
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*/
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struct mem_segment_descriptor {
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unsigned sd_lolimit:16; /* segment extent (lsb) */
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unsigned sd_lobase:24; /* segment base address (lsb) */
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unsigned sd_type:5; /* segment type */
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unsigned sd_dpl:2; /* segment descriptor priority level */
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unsigned sd_p:1; /* segment descriptor present */
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unsigned sd_hilimit:4; /* segment extent (msb) */
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unsigned sd_avl:1; /* available */
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unsigned sd_long:1; /* long mode */
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unsigned sd_def32:1; /* default 32 vs 16 bit size */
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unsigned sd_gran:1; /* limit granularity (byte/page) */
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unsigned sd_hibase:8; /* segment base address (msb) */
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unsigned sd_lolimit:16; /* segment extent (lsb) */
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unsigned sd_lobase:24; /* segment base address (lsb) */
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unsigned sd_type:5; /* segment type */
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unsigned sd_dpl:2; /* segment descriptor priority level */
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unsigned sd_p:1; /* segment descriptor present */
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unsigned sd_hilimit:4; /* segment extent (msb) */
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unsigned sd_avl:1; /* available */
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unsigned sd_long:1; /* long mode */
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unsigned sd_def32:1; /* default 32 vs 16 bit size */
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unsigned sd_gran:1; /* limit granularity (byte/page) */
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unsigned sd_hibase:8; /* segment base address (msb) */
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} __packed;
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/*
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@ -195,17 +195,17 @@ struct common_segment_descriptor {
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* Gate descriptors (e.g. indirect descriptors)
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*/
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struct gate_descriptor {
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/*BITFIELDTYPE*/ uint64_t gd_looffset:16;/* gate offset (lsb) */
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/*BITFIELDTYPE*/ uint64_t gd_selector:16;/* gate segment selector */
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/*BITFIELDTYPE*/ uint64_t gd_ist:3; /* IST select */
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/*BITFIELDTYPE*/ uint64_t gd_xx1:5; /* reserved */
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/*BITFIELDTYPE*/ uint64_t gd_type:5; /* segment type */
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/*BITFIELDTYPE*/ uint64_t gd_dpl:2; /* segment descriptor priority level */
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/*BITFIELDTYPE*/ uint64_t gd_p:1; /* segment descriptor present */
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/*BITFIELDTYPE*/ uint64_t gd_hioffset:48;/* gate offset (msb) */
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/*BITFIELDTYPE*/ uint64_t gd_xx2:8; /* reserved */
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/*BITFIELDTYPE*/ uint64_t gd_zero:5; /* must be zero */
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/*BITFIELDTYPE*/ uint64_t gd_xx3:19; /* reserved */
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uint64_t gd_looffset:16;/* gate offset (lsb) */
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uint64_t gd_selector:16;/* gate segment selector */
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uint64_t gd_ist:3; /* IST select */
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uint64_t gd_xx1:5; /* reserved */
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uint64_t gd_type:5; /* segment type */
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uint64_t gd_dpl:2; /* segment descriptor priority level */
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uint64_t gd_p:1; /* segment descriptor present */
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uint64_t gd_hioffset:48;/* gate offset (msb) */
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uint64_t gd_xx2:8; /* reserved */
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uint64_t gd_zero:5; /* must be zero */
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uint64_t gd_xx3:19; /* reserved */
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} __packed;
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/*
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@ -221,8 +221,8 @@ union descriptor {
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* region descriptors, used to load gdt/idt tables before segments yet exist.
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*/
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struct region_descriptor {
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uint16_t rd_limit; /* segment extent */
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uint64_t rd_base; /* base address */
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uint16_t rd_limit; /* segment extent */
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uint64_t rd_base; /* base address */
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} __packed;
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#ifdef _KERNEL
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@ -241,9 +241,9 @@ void setgate(struct gate_descriptor *, void *, int, int, int, int);
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void unsetgate(struct gate_descriptor *);
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void setregion(struct region_descriptor *, void *, uint16_t);
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void set_sys_segment(struct sys_segment_descriptor *, void *, size_t,
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int, int, int);
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int, int, int);
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void set_mem_segment(struct mem_segment_descriptor *, void *, size_t,
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int, int, int, int, int);
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int, int, int, int, int);
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void cpu_init_idt(void);
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void update_descriptor(void *, void *);
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@ -264,40 +264,40 @@ void cpu_fsgs_reload(struct lwp *, int, int);
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#endif /* !_LOCORE */
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/* system segments and gate types */
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#define SDT_SYSNULL 0 /* system null */
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#define SDT_SYS286TSS 1 /* system 286 TSS available */
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#define SDT_SYSLDT 2 /* system local descriptor table */
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#define SDT_SYS286BSY 3 /* system 286 TSS busy */
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#define SDT_SYS286CGT 4 /* system 286 call gate */
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#define SDT_SYSTASKGT 5 /* system task gate */
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#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
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#define SDT_SYS286TGT 7 /* system 286 trap gate */
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#define SDT_SYSNULL2 8 /* system null again */
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#define SDT_SYS386TSS 9 /* system 386 TSS available */
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#define SDT_SYSNULL3 10 /* system null again */
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#define SDT_SYS386BSY 11 /* system 386 TSS busy */
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#define SDT_SYS386CGT 12 /* system 386 call gate */
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#define SDT_SYSNULL4 13 /* system null again */
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#define SDT_SYS386IGT 14 /* system 386 interrupt gate */
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#define SDT_SYS386TGT 15 /* system 386 trap gate */
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#define SDT_SYSNULL 0 /* system null */
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#define SDT_SYS286TSS 1 /* system 286 TSS available */
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#define SDT_SYSLDT 2 /* system local descriptor table */
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#define SDT_SYS286BSY 3 /* system 286 TSS busy */
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#define SDT_SYS286CGT 4 /* system 286 call gate */
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#define SDT_SYSTASKGT 5 /* system task gate */
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#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
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#define SDT_SYS286TGT 7 /* system 286 trap gate */
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#define SDT_SYSNULL2 8 /* system null again */
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#define SDT_SYS386TSS 9 /* system 386 TSS available */
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#define SDT_SYSNULL3 10 /* system null again */
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#define SDT_SYS386BSY 11 /* system 386 TSS busy */
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#define SDT_SYS386CGT 12 /* system 386 call gate */
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#define SDT_SYSNULL4 13 /* system null again */
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#define SDT_SYS386IGT 14 /* system 386 interrupt gate */
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#define SDT_SYS386TGT 15 /* system 386 trap gate */
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/* memory segment types */
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#define SDT_MEMRO 16 /* memory read only */
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#define SDT_MEMROA 17 /* memory read only accessed */
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#define SDT_MEMRW 18 /* memory read write */
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#define SDT_MEMRWA 19 /* memory read write accessed */
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#define SDT_MEMROD 20 /* memory read only expand dwn limit */
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#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */
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#define SDT_MEMRWD 22 /* memory read write expand dwn limit */
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#define SDT_MEMRWDA 23 /* memory read write expand dwn limit acessed */
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#define SDT_MEME 24 /* memory execute only */
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#define SDT_MEMEA 25 /* memory execute only accessed */
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#define SDT_MEMER 26 /* memory execute read */
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#define SDT_MEMERA 27 /* memory execute read accessed */
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#define SDT_MEMEC 28 /* memory execute only conforming */
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#define SDT_MEMEAC 29 /* memory execute only accessed conforming */
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#define SDT_MEMERC 30 /* memory execute read conforming */
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#define SDT_MEMERAC 31 /* memory execute read accessed conforming */
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#define SDT_MEMRO 16 /* memory read only */
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#define SDT_MEMROA 17 /* memory read only accessed */
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#define SDT_MEMRW 18 /* memory read write */
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#define SDT_MEMRWA 19 /* memory read write accessed */
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#define SDT_MEMROD 20 /* memory read only expand dwn limit */
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#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */
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#define SDT_MEMRWD 22 /* memory read write expand dwn limit */
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#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */
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#define SDT_MEME 24 /* memory execute only */
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#define SDT_MEMEA 25 /* memory execute only accessed */
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#define SDT_MEMER 26 /* memory execute read */
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#define SDT_MEMERA 27 /* memory execute read accessed */
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#define SDT_MEMEC 28 /* memory execute only conforming */
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#define SDT_MEMEAC 29 /* memory execute only accessed conforming */
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#define SDT_MEMERC 30 /* memory execute read conforming */
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#define SDT_MEMERAC 31 /* memory execute read accessed conforming */
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/* is memory segment descriptor pointer ? */
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#define ISMEMSDP(s) ((s->d_type) >= SDT_MEMRO && \
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/*
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* Segment Protection Exception code bits
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*/
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#define SEGEX_EXT 0x01 /* recursive or externally induced */
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#define SEGEX_IDT 0x02 /* interrupt descriptor table */
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#define SEGEX_TI 0x04 /* local descriptor table */
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#define SEGEX_EXT 0x01 /* recursive or externally induced */
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#define SEGEX_IDT 0x02 /* interrupt descriptor table */
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#define SEGEX_TI 0x04 /* local descriptor table */
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/*
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* Entries in the Interrupt Descriptor Table (IDT)
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*/
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#define NIDT 256
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#define NRSVIDT 32 /* reserved entries for CPU exceptions */
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#define NIDT 256
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#define NRSVIDT 32 /* reserved entries for CPU exceptions */
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/*
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* Entries in the Global Descriptor Table (GDT)
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* Then come the predefined LDT (and possibly TSS) descriptors.
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* There are NGDT_SYS of them.
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*/
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#define GNULL_SEL 0 /* Null descriptor */
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#define GCODE_SEL 1 /* Kernel code descriptor */
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#define GDATA_SEL 2 /* Kernel data descriptor */
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#define GUCODE_SEL 3 /* User code descriptor */
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#define GUDATA_SEL 4 /* User data descriptor */
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#define GAPM32CODE_SEL 5
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#define GAPM16CODE_SEL 6
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#define GAPMDATA_SEL 7
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#define GBIOSCODE_SEL 8
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#define GBIOSDATA_SEL 9
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#define GNULL_SEL 0 /* Null descriptor */
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#define GCODE_SEL 1 /* Kernel code descriptor */
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#define GDATA_SEL 2 /* Kernel data descriptor */
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#define GUCODE_SEL 3 /* User code descriptor */
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#define GUDATA_SEL 4 /* User data descriptor */
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#define GAPM32CODE_SEL 5
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#define GAPM16CODE_SEL 6
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#define GAPMDATA_SEL 7
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#define GBIOSCODE_SEL 8
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#define GBIOSDATA_SEL 9
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#define GPNPBIOSCODE_SEL 10
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#define GPNPBIOSDATA_SEL 11
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#define GPNPBIOSSCRATCH_SEL 12
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#define GUDATA32_SEL 15
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#define GUFS_SEL 16 /* 32-bit Per-thread %fs */
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#define GUGS_SEL 17 /* 32-bit Per-thread %gs */
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#define NGDT_MEM 18
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#define NGDT_MEM 18
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#define GLDT_SEL 0 /* Default LDT descriptor */
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#define GLDT_SEL 0 /* Default LDT descriptor */
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#define NGDT_SYS 1
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#define GDT_ADDR_MEM(s,i) \
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* Byte offsets in the Local Descriptor Table (LDT)
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* Strange order because of syscall/sysret insns
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*/
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#define LSYS5CALLS_SEL 0 /* iBCS system call gate */
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#define LSYS5CALLS_SEL 0 /* iBCS system call gate */
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/* 8 second half */
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#define LSOL26CALLS_SEL 32 /* Solaris 2.6 system call gate */
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#define LSOL26CALLS_SEL 32 /* Solaris 2.6 system call gate */
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/* 40 second half */
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#define LUCODE32_SEL 48 /* 32 bit user code descriptor */
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#define LUDATA_SEL 56 /* User data descriptor */
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#define LUCODE_SEL 64 /* User code descriptor */
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#define LUDATA_SEL 56 /* User data descriptor */
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#define LUCODE_SEL 64 /* User code descriptor */
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#define LUDATA32_SEL 72 /* 32 bit user data descriptor (needed?)*/
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#define LBSDICALLS_SEL 128 /* BSDI system call gate */
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#define LBSDICALLS_SEL 128 /* BSDI system call gate */
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/* 136 second half */
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#define LDT_SIZE 144
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