iCE40/nextpnr - clone of git://git.panaceas.org/iCE40/nextpnr

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author	David Shah <davey1576@gmail.com>	2018-06-25 13:09:50 +0200
committer	David Shah <davey1576@gmail.com>	2018-06-25 13:09:50 +0200
commit	28d8f8b2cb4c417816a67adb1b9c7e469fc22357 (patch)
tree	5d5c181d98fd094c797118c4c7c0822a8179f880 /3rdparty
parent	bdd54a68471a68bb9e3f8125c1457cd039cc768b (diff)
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ice40: Start work on the placement legaliser

Signed-off-by: David Shah <davey1576@gmail.com>

Diffstat (limited to '3rdparty')

0 files changed, 0 insertions, 0 deletions

/*- * Copyright (c) 1989, 1990 William F. Jolitz * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)segments.h 7.1 (Berkeley) 5/9/91 * $FreeBSD: src/sys/i386/include/segments.h,v 1.36 2003/11/03 21:12:04 jhb Exp $ */ #ifndef _MACHINE_SEGMENTS_H_ #define _MACHINE_SEGMENTS_H_ /* * 386 Segmentation Data Structures and definitions * William F. Jolitz (william@ernie.berkeley.edu) 6/20/1989 */ /* * Selectors */ #define ISPL(s) ((s)&3) /* what is the priority level of a selector */ #define SEL_KPL 1 /* 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 */ /* * Memory and System segment descriptors */ struct segment_descriptor { unsigned sd_lolimit:16 ; /* segment extent (lsb) */ unsigned sd_lobase:24 __packed; /* segment base address (lsb) */ unsigned sd_type:5 ; /* segment type */ unsigned sd_dpl:2 ; /* segment descriptor priority level */ unsigned sd_p:1 ; /* segment descriptor present */ unsigned sd_hilimit:4 ; /* segment extent (msb) */ unsigned sd_xx:2 ; /* unused */ unsigned sd_def32:1 ; /* default 32 vs 16 bit size */ unsigned sd_gran:1 ; /* limit granularity (byte/page units)*/ unsigned sd_hibase:8 ; /* segment base address (msb) */ } ; /* * Gate descriptors (e.g. indirect descriptors) */ struct gate_descriptor { unsigned gd_looffset:16 ; /* gate offset (lsb) */ unsigned gd_selector:16 ; /* gate segment selector */ unsigned gd_stkcpy:5 ; /* number of stack wds to cpy */ unsigned gd_xx:3 ; /* unused */ unsigned gd_type:5 ; /* segment type */ unsigned gd_dpl:2 ; /* segment descriptor priority level */ unsigned gd_p:1 ; /* segment descriptor present */ unsigned gd_hioffset:16 ; /* gate offset (msb) */ } ; /* * Generic descriptor */ union descriptor { struct 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 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_SYS386TSS 9 /* system 386 TSS available */ #define SDT_SYSNULL3 10 /* system null again */ #define SDT_SYS386BSY 11 /* system 386 TSS busy */ #define SDT_SYS386CGT 12 /* system 386 call gate */ #define SDT_SYSNULL4 13 /* system null again */ #define SDT_SYS386IGT 14 /* system 386 interrupt gate */ #define SDT_SYS386TGT 15 /* system 386 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 */ struct soft_segment_descriptor { unsigned ssd_base ; /* segment base address */ unsigned ssd_limit ; /* segment extent */ unsigned ssd_type:5 ; /* segment type */ unsigned ssd_dpl:2 ; /* segment descriptor priority level */ unsigned ssd_p:1 ; /* segment descriptor present */ unsigned ssd_xx:4 ; /* unused */ unsigned ssd_xx1:2 ; /* unused */ unsigned ssd_def32:1 ; /* default 32 vs 16 bit size */ unsigned ssd_gran:1 ; /* limit granularity (byte/page units)*/ }; /* * region descriptors, used to load gdt/idt tables before segments yet exist. */ struct region_descriptor { unsigned rd_limit:16; /* segment extent */ unsigned rd_base:32 __packed; /* base address */ }; /* * Segment Protection Exception code bits */ #define SEGEX_EXT 0x01 /* recursive or externally induced */ #define SEGEX_IDT 0x02 /* interrupt descriptor table */ #define SEGEX_TI 0x04 /* local descriptor table */ /* other bits are affected descriptor index */ #define SEGEX_IDX(s) (((s)>>3)&0x1fff) /* * Size of IDT table */ #define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */ #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_SYSCALL 0x80 /* System Call Interrupt Vector */ /* * Entries in the Global Descriptor Table (GDT) */ #define GNULL_SEL 0 /* Null Descriptor */ #if 0 #define GCODE_SEL 1 /* Kernel Code Descriptor */ #define GDATA_SEL 2 /* Kernel Data Descriptor */ #else #define GCODE_SEL (__KERNEL_CS >> 3) /* Kernel Code Descriptor */ #define GDATA_SEL (__KERNEL_DS >> 3) /* Kernel Data Descriptor */ #endif #define GPRIV_SEL 3 /* SMP Per-Processor Private Data */ #define GPROC0_SEL 4 /* Task state process slot zero and up */ #define GLDT_SEL 5 /* LDT - eventually one per process */ #define GUSERLDT_SEL 6 /* User LDT */ #define GTGATE_SEL 7 /* Process task switch gate */ #define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */ #define GPANIC_SEL 9 /* Task state to consider panic from */ #define GBIOSCODE32_SEL 10 /* BIOS interface (32bit Code) */ #define GBIOSCODE16_SEL 11 /* BIOS interface (16bit Code) */ #define GBIOSDATA_SEL 12 /* BIOS interface (Data) */ #define GBIOSUTIL_SEL 13 /* BIOS interface (Utility) */ #define GBIOSARGS_SEL 14 /* BIOS interface (Arguments) */ #define NGDT 4 /* * Entries in the Local Descriptor Table (LDT) */ #define LSYS5CALLS_SEL 0 /* forced by intel BCS */ #define LSYS5SIGR_SEL 1 #define L43BSDCALLS_SEL 2 /* notyet */ #define LUCODE_SEL 3 #define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */ #define LUDATA_SEL 5 /* separate stack, es,fs,gs sels ? */ /* #define LPOSIXCALLS_SEL 5*/ /* notyet */ #define LBSDICALLS_SEL 16 /* BSDI system call gate */ #define NLDT (LBSDICALLS_SEL + 1) #ifdef _KERNEL extern int _default_ldt; extern union descriptor *gdt; extern struct soft_segment_descriptor gdt_segs[]; extern struct gate_descriptor *idt; extern union descriptor *ldt; extern struct region_descriptor r_gdt, r_idt; void lgdt(struct region_descriptor *rdp); void lgdt_finish(void); void sdtossd(struct segment_descriptor *sdp, struct soft_segment_descriptor *ssdp); void ssdtosd(struct soft_segment_descriptor *ssdp, struct segment_descriptor *sdp); #endif /* _KERNEL */ #endif /* !_MACHINE_SEGMENTS_H_ */


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