161 lines
6.8 KiB
C
161 lines
6.8 KiB
C
|
|
#ifndef _I386_ACONST_H
|
|
#define _I386_ACONST_H 1
|
|
|
|
#include <ibm/interrupt.h>
|
|
#include <ibm/memory.h>
|
|
|
|
#define NR_REMOTE_SEGS 3 /* # remote memory regions (variable) */
|
|
|
|
/* Constants for protected mode. */
|
|
|
|
/* Table sizes. */
|
|
#define GDT_SIZE (FIRST_LDT_INDEX + NR_TASKS + NR_PROCS)
|
|
/* spec. and LDT's */
|
|
#define IDT_SIZE 256 /* the table is set to it's maximal size */
|
|
|
|
/* Fixed global descriptors. 1 to 7 are prescribed by the BIOS. */
|
|
#define GDT_INDEX 1 /* GDT descriptor */
|
|
#define IDT_INDEX 2 /* IDT descriptor */
|
|
#define DS_INDEX 3 /* kernel DS */
|
|
#define ES_INDEX 4 /* kernel ES (386: flag 4 Gb at startup) */
|
|
#define SS_INDEX 5 /* kernel SS (386: monitor SS at startup) */
|
|
#define CS_INDEX 6 /* kernel CS */
|
|
#define MON_CS_INDEX 7 /* temp for BIOS (386: monitor CS at startup) */
|
|
#define DS_286_INDEX 8 /* scratch 16-bit source segment */
|
|
#define ES_286_INDEX 9 /* scratch 16-bit destination segment */
|
|
#define TSS_INDEX 10 /* kernel TSS */
|
|
#define FIRST_LDT_INDEX 11 /* rest of descriptors are LDT's */
|
|
|
|
/* Descriptor structure offsets. */
|
|
#define DESC_BASE 2 /* to base_low */
|
|
#define DESC_BASE_MIDDLE 4 /* to base_middle */
|
|
#define DESC_ACCESS 5 /* to access byte */
|
|
#define DESC_SIZE 8 /* sizeof (struct segdesc_s) */
|
|
|
|
/*
|
|
* WARNING no () around the macros, be careful. This is because of ACK assembler
|
|
* and will be fixed after switching to GAS
|
|
*/
|
|
#define GDT_SELECTOR GDT_INDEX * DESC_SIZE
|
|
#define IDT_SELECTOR IDT_INDEX * DESC_SIZE
|
|
#define DS_SELECTOR DS_INDEX * DESC_SIZE
|
|
#define ES_SELECTOR ES_INDEX * DESC_SIZE
|
|
/* flat DS is less privileged ES */
|
|
#define FLAT_DS_SELECTOR ES_SELECTOR | TASK_PRIVILEGE
|
|
#define SS_SELECTOR SS_INDEX * DESC_SIZE
|
|
#define CS_SELECTOR CS_INDEX * DESC_SIZE
|
|
#define MON_CS_SELECTOR MON_CS_INDEX * DESC_SIZE
|
|
#define TSS_SELECTOR TSS_INDEX * DESC_SIZE
|
|
#define DS_286_SELECTOR DS_286_INDEX*DESC_SIZE | TASK_PRIVILEGE
|
|
#define ES_286_SELECTOR ES_286_INDEX*DESC_SIZE | TASK_PRIVILEGE
|
|
|
|
/* Privileges. */
|
|
#define INTR_PRIVILEGE 0 /* kernel and interrupt handlers */
|
|
#define TASK_PRIVILEGE 1 /* kernel tasks */
|
|
#define USER_PRIVILEGE 3 /* servers and user processes */
|
|
#define RPL_MASK 0x03 /* bits in selector RPL */
|
|
|
|
/* 286 hardware constants. */
|
|
|
|
/* Exception vector numbers. */
|
|
#define BOUNDS_VECTOR 5 /* bounds check failed */
|
|
#define INVAL_OP_VECTOR 6 /* invalid opcode */
|
|
#define COPROC_NOT_VECTOR 7 /* coprocessor not available */
|
|
#define DOUBLE_FAULT_VECTOR 8
|
|
#define COPROC_SEG_VECTOR 9 /* coprocessor segment overrun */
|
|
#define INVAL_TSS_VECTOR 10 /* invalid TSS */
|
|
#define SEG_NOT_VECTOR 11 /* segment not present */
|
|
#define STACK_FAULT_VECTOR 12 /* stack exception */
|
|
#define PROTECTION_VECTOR 13 /* general protection */
|
|
|
|
/* Selector bits. */
|
|
#define TI 0x04 /* table indicator */
|
|
#define RPL 0x03 /* requester privilege level */
|
|
|
|
/* Base and limit sizes and shifts. */
|
|
#define BASE_MIDDLE_SHIFT 16 /* shift for base --> base_middle */
|
|
|
|
/* Access-byte and type-byte bits. */
|
|
#define PRESENT 0x80 /* set for descriptor present */
|
|
#define DPL 0x60 /* descriptor privilege level mask */
|
|
#define DPL_SHIFT 5
|
|
#define SEGMENT 0x10 /* set for segment-type descriptors */
|
|
|
|
/* Access-byte bits. */
|
|
#define EXECUTABLE 0x08 /* set for executable segment */
|
|
#define CONFORMING 0x04 /* set for conforming segment if executable */
|
|
#define EXPAND_DOWN 0x04 /* set for expand-down segment if !executable*/
|
|
#define READABLE 0x02 /* set for readable segment if executable */
|
|
#define WRITEABLE 0x02 /* set for writeable segment if !executable */
|
|
#define TSS_BUSY 0x02 /* set if TSS descriptor is busy */
|
|
#define ACCESSED 0x01 /* set if segment accessed */
|
|
|
|
/* Special descriptor types. */
|
|
#define AVL_286_TSS 1 /* available 286 TSS */
|
|
#define LDT 2 /* local descriptor table */
|
|
#define BUSY_286_TSS 3 /* set transparently to the software */
|
|
#define CALL_286_GATE 4 /* not used */
|
|
#define TASK_GATE 5 /* only used by debugger */
|
|
#define INT_286_GATE 6 /* interrupt gate, used for all vectors */
|
|
#define TRAP_286_GATE 7 /* not used */
|
|
|
|
#define INT_GATE_TYPE (INT_286_GATE | DESC_386_BIT)
|
|
#define TSS_TYPE (AVL_286_TSS | DESC_386_BIT)
|
|
|
|
|
|
/* Extra 386 hardware constants. */
|
|
|
|
/* Exception vector numbers. */
|
|
#define PAGE_FAULT_VECTOR 14
|
|
#define COPROC_ERR_VECTOR 16 /* coprocessor error */
|
|
#define ALIGNMENT_CHECK_VECTOR 17
|
|
#define MACHINE_CHECK_VECTOR 18
|
|
#define SIMD_EXCEPTION_VECTOR 19 /* SIMD Floating-Point Exception (#XM) */
|
|
|
|
/* Descriptor structure offsets. */
|
|
#define DESC_GRANULARITY 6 /* to granularity byte */
|
|
#define DESC_BASE_HIGH 7 /* to base_high */
|
|
|
|
/* Type-byte bits. */
|
|
#define DESC_386_BIT 0x08 /* 386 types are obtained by ORing with this */
|
|
/* LDT's and TASK_GATE's don't need it */
|
|
|
|
/* Base and limit sizes and shifts. */
|
|
#define BASE_HIGH_SHIFT 24 /* shift for base --> base_high */
|
|
#define BYTE_GRAN_MAX 0xFFFFFL /* maximum size for byte granular segment */
|
|
#define GRANULARITY_SHIFT 16 /* shift for limit --> granularity */
|
|
#define OFFSET_HIGH_SHIFT 16 /* shift for (gate) offset --> offset_high */
|
|
#define PAGE_GRAN_SHIFT 12 /* extra shift for page granular limits */
|
|
|
|
/* Granularity byte. */
|
|
#define GRANULAR 0x80 /* set for 4K granularilty */
|
|
#define DEFAULT 0x40 /* set for 32-bit defaults (executable seg) */
|
|
#define BIG 0x40 /* set for "BIG" (expand-down seg) */
|
|
#define AVL 0x10 /* 0 for available */
|
|
#define LIMIT_HIGH 0x0F /* mask for high bits of limit */
|
|
|
|
/* Program stack words and masks. */
|
|
#define INIT_PSW 0x0200 /* initial psw */
|
|
#define INIT_TASK_PSW 0x1200 /* initial psw for tasks (with IOPL 1) */
|
|
#define TRACEBIT 0x0100 /* OR this with psw in proc[] for tracing */
|
|
#define SETPSW(rp, new) /* permits only certain bits to be set */ \
|
|
((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5)
|
|
#define IF_MASK 0x00000200
|
|
#define IOPL_MASK 0x003000
|
|
|
|
#define vir2phys(vir) ((phys_bytes)((kinfo.data_base + (vir_bytes) (vir))))
|
|
#define phys2vir(ph) ((vir_bytes)((vir_bytes) (ph) - kinfo.data_base))
|
|
|
|
#define INTEL_CPUID_GEN_EBX 0x756e6547 /* ASCII value of "Genu" */
|
|
#define INTEL_CPUID_GEN_EDX 0x49656e69 /* ASCII value of "ineI" */
|
|
#define INTEL_CPUID_GEN_ECX 0x6c65746e /* ASCII value of "ntel" */
|
|
|
|
#define AMD_CPUID_GEN_EBX 0x68747541 /* ASCII value of "Auth" */
|
|
#define AMD_CPUID_GEN_EDX 0x69746e65 /* ASCII value of "enti" */
|
|
#define AMD_CPUID_GEN_ECX 0x444d4163 /* ASCII value of "cAMD" */
|
|
|
|
/* fpu context should be saved in 16-byte aligned memory */
|
|
#define FPUALIGN 16
|
|
|
|
#endif /* _I386_ACONST_H */
|