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author | tijl <tijl@FreeBSD.org> | 2012-03-19 21:24:50 +0000 |
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committer | tijl <tijl@FreeBSD.org> | 2012-03-19 21:24:50 +0000 |
commit | 2a126f1975785720c0ebda4bddf37bdb73b6a197 (patch) | |
tree | 60d302c823c101099048ad6d167a9a3f17e9a877 /sys/amd64 | |
parent | e86f714c838f0ea47586ee0b771dc80bb182dfc8 (diff) | |
download | FreeBSD-src-2a126f1975785720c0ebda4bddf37bdb73b6a197.zip FreeBSD-src-2a126f1975785720c0ebda4bddf37bdb73b6a197.tar.gz |
Move userland bits (and some common kernel bits) from amd64 and i386
segments.h to a new x86 segments.h.
Add __packed attribute to some structs (just to be sure).
Also make it clear that i386 GDT and LDT entries are used in ia64 code.
Diffstat (limited to 'sys/amd64')
-rw-r--r-- | sys/amd64/include/segments.h | 151 |
1 files changed, 1 insertions, 150 deletions
diff --git a/sys/amd64/include/segments.h b/sys/amd64/include/segments.h index 247cc34..d9f4280 100644 --- a/sys/amd64/include/segments.h +++ b/sys/amd64/include/segments.h @@ -41,45 +41,7 @@ * AMD64 Segmentation Data Structures and definitions */ -/* - * Selectors - */ - -#define SEL_RPL_MASK 3 /* requester priv level */ -#define ISPL(s) ((s)&3) /* what is the priority level of a selector */ -#define SEL_KPL 0 /* kernel priority level */ -#define SEL_UPL 3 /* user priority level */ -#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */ -#define SEL_LDT 4 /* local descriptor table */ -#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */ -#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */ -#define GSEL(s,r) (((s)<<3) | r) /* a global selector */ - -/* - * User segment descriptors (%cs, %ds etc for compatability apps. 64 bit wide) - * For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl, - * sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p. - */ -struct user_segment_descriptor { - u_int64_t sd_lolimit:16; /* segment extent (lsb) */ - u_int64_t sd_lobase:24; /* segment base address (lsb) */ - u_int64_t sd_type:5; /* segment type */ - u_int64_t sd_dpl:2; /* segment descriptor priority level */ - u_int64_t sd_p:1; /* segment descriptor present */ - u_int64_t sd_hilimit:4; /* segment extent (msb) */ - u_int64_t sd_xx:1; /* unused */ - u_int64_t sd_long:1; /* long mode (cs only) */ - u_int64_t sd_def32:1; /* default 32 vs 16 bit size */ - u_int64_t sd_gran:1; /* limit granularity (byte/page units)*/ - u_int64_t sd_hibase:8; /* segment base address (msb) */ -} __packed; - -#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24) -#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \ - (sd)->sd_hibase = ((b) >> 24); -#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16) -#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \ - (sd)->sd_hilimit = ((l) >> 16); +#include <x86/segments.h> /* * System segment descriptors (128 bit wide) @@ -100,66 +62,6 @@ struct system_segment_descriptor { } __packed; /* - * Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit) - * Only interrupt and trap gates have gd_ist. - */ -struct gate_descriptor { - u_int64_t gd_looffset:16; /* gate offset (lsb) */ - u_int64_t gd_selector:16; /* gate segment selector */ - u_int64_t gd_ist:3; /* IST table index */ - u_int64_t gd_xx:5; /* unused */ - u_int64_t gd_type:5; /* segment type */ - u_int64_t gd_dpl:2; /* segment descriptor priority level */ - u_int64_t gd_p:1; /* segment descriptor present */ - u_int64_t gd_hioffset:48 __packed; /* gate offset (msb) */ - u_int64_t sd_xx1:32; -} __packed; - -/* - * Generic descriptor - */ -union descriptor { - struct user_segment_descriptor sd; - struct gate_descriptor gd; -}; - - /* system segments and gate types */ -#define SDT_SYSNULL 0 /* system null */ -#define SDT_SYS286TSS 1 /* system 286 TSS available */ -#define SDT_SYSLDT 2 /* system 64 bit local descriptor table */ -#define SDT_SYS286BSY 3 /* system 286 TSS busy */ -#define SDT_SYS286CGT 4 /* system 286 call gate */ -#define SDT_SYSTASKGT 5 /* system task gate */ -#define SDT_SYS286IGT 6 /* system 286 interrupt gate */ -#define SDT_SYS286TGT 7 /* system 286 trap gate */ -#define SDT_SYSNULL2 8 /* system null again */ -#define SDT_SYSTSS 9 /* system available 64 bit TSS */ -#define SDT_SYSNULL3 10 /* system null again */ -#define SDT_SYSBSY 11 /* system busy 64 bit TSS */ -#define SDT_SYSCGT 12 /* system 64 bit call gate */ -#define SDT_SYSNULL4 13 /* system null again */ -#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */ -#define SDT_SYSTGT 15 /* system 64 bit trap gate */ - - /* memory segment types */ -#define SDT_MEMRO 16 /* memory read only */ -#define SDT_MEMROA 17 /* memory read only accessed */ -#define SDT_MEMRW 18 /* memory read write */ -#define SDT_MEMRWA 19 /* memory read write accessed */ -#define SDT_MEMROD 20 /* memory read only expand dwn limit */ -#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */ -#define SDT_MEMRWD 22 /* memory read write expand dwn limit */ -#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */ -#define SDT_MEME 24 /* memory execute only */ -#define SDT_MEMEA 25 /* memory execute only accessed */ -#define SDT_MEMER 26 /* memory execute read */ -#define SDT_MEMERA 27 /* memory execute read accessed */ -#define SDT_MEMEC 28 /* memory execute only conforming */ -#define SDT_MEMEAC 29 /* memory execute only accessed conforming */ -#define SDT_MEMERC 30 /* memory execute read conforming */ -#define SDT_MEMERAC 31 /* memory execute read accessed conforming */ - -/* * Software definitions are in this convenient format, * which are translated into inconvenient segment descriptors * when needed to be used by the 386 hardware @@ -184,56 +86,6 @@ struct region_descriptor { unsigned long rd_base:64 __packed; /* base address */ } __packed; -/* - * Size of IDT table - */ -#define NIDT 256 /* 32 reserved, 16 h/w, 0 s/w, linux's 0x80 */ -#define NRSVIDT 32 /* reserved entries for cpu exceptions */ - -/* - * Entries in the Interrupt Descriptor Table (IDT) - */ -#define IDT_DE 0 /* #DE: Divide Error */ -#define IDT_DB 1 /* #DB: Debug */ -#define IDT_NMI 2 /* Nonmaskable External Interrupt */ -#define IDT_BP 3 /* #BP: Breakpoint */ -#define IDT_OF 4 /* #OF: Overflow */ -#define IDT_BR 5 /* #BR: Bound Range Exceeded */ -#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */ -#define IDT_NM 7 /* #NM: No Math Coprocessor */ -#define IDT_DF 8 /* #DF: Double Fault */ -#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */ -#define IDT_TS 10 /* #TS: Invalid TSS */ -#define IDT_NP 11 /* #NP: Segment Not Present */ -#define IDT_SS 12 /* #SS: Stack Segment Fault */ -#define IDT_GP 13 /* #GP: General Protection Fault */ -#define IDT_PF 14 /* #PF: Page Fault */ -#define IDT_MF 16 /* #MF: FPU Floating-Point Error */ -#define IDT_AC 17 /* #AC: Alignment Check */ -#define IDT_MC 18 /* #MC: Machine Check */ -#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */ -#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */ -#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */ -#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */ - -/* - * Entries in the Global Descriptor Table (GDT) - */ -#define GNULL_SEL 0 /* Null Descriptor */ -#define GNULL2_SEL 1 /* Null Descriptor */ -#define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */ -#define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */ -#define GCODE_SEL 4 /* Kernel Code Descriptor */ -#define GDATA_SEL 5 /* Kernel Data Descriptor */ -#define GUCODE32_SEL 6 /* User 32 bit code Descriptor */ -#define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */ -#define GUCODE_SEL 8 /* User 64 bit Code Descriptor */ -#define GPROC0_SEL 9 /* TSS for entering kernel etc */ -/* slot 10 is second half of GPROC0_SEL */ -#define GUSERLDT_SEL 11 /* LDT */ -/* slot 11 is second half of GUSERLDT_SEL */ -#define NGDT 13 - #ifdef _KERNEL extern struct user_segment_descriptor gdt[]; extern struct soft_segment_descriptor gdt_segs[]; @@ -249,7 +101,6 @@ void ssdtosyssd(struct soft_segment_descriptor *ssdp, struct system_segment_descriptor *sdp); void update_gdt_gsbase(struct thread *td, uint32_t base); void update_gdt_fsbase(struct thread *td, uint32_t base); - #endif /* _KERNEL */ #endif /* !_MACHINE_SEGMENTS_H_ */ |