#ifndef _I386_ACONST_H #define _I386_ACONST_H 1 #include #include #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 TSS_INDEX 8 /* kernel TSS */ #define FIRST_LDT_INDEX 9 /* 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 #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 /* Privileges. */ #define INTR_PRIVILEGE 0 /* kernel and interrupt handlers */ #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 */