#ifndef _I386_ACONST_H #define _I386_ACONST_H 1 #include #include /* Constants for protected mode. */ /* Table sizes. */ #define IDT_SIZE 256 /* the table is set to it's maximal size */ /* GDT layout (SYSENTER/SYSEXIT compliant) */ #define KERN_CS_INDEX 1 #define KERN_DS_INDEX 2 #define USER_CS_INDEX 3 #define USER_DS_INDEX 4 #define LDT_INDEX 5 #define TSS_INDEX_FIRST 6 #define TSS_INDEX(cpu) (TSS_INDEX_FIRST + (cpu)) /* per cpu kernel tss */ #define GDT_SIZE (TSS_INDEX(CONFIG_MAX_CPUS)) /* LDT descriptor */ #define SEG_SELECTOR(i) ((i)*8) #define KERN_CS_SELECTOR SEG_SELECTOR(KERN_CS_INDEX) #define KERN_DS_SELECTOR SEG_SELECTOR(KERN_DS_INDEX) #define USER_CS_SELECTOR (SEG_SELECTOR(USER_CS_INDEX) | USER_PRIVILEGE) #define USER_DS_SELECTOR (SEG_SELECTOR(USER_DS_INDEX) | USER_PRIVILEGE) #define LDT_SELECTOR SEG_SELECTOR(LDT_INDEX) #define TSS_SELECTOR(cpu) SEG_SELECTOR(TSS_INDEX(cpu)) #define DESC_SIZE 8 /* 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 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" */ #define CPU_VENDOR_INTEL 0 #define CPU_VENDOR_AMD 2 #define CPU_VENDOR_UNKNOWN 0xff /* fpu context should be saved in 16-byte aligned memory */ #define FPUALIGN 16 /* Poweroff 16-bit code address */ #define BIOS_POWEROFF_ENTRY 0x1000 /* * defines how many bytes are reserved at the top of the kernel stack for global * information like currently scheduled process or current cpu id */ #define X86_STACK_TOP_RESERVED (2 * sizeof(reg_t)) #define PG_ALLOCATEME ((phys_bytes)-1) /* MSRs */ #define INTEL_MSR_PERFMON_CRT0 0xc1 #define INTEL_MSR_SYSENTER_CS 0x174 #define INTEL_MSR_SYSENTER_ESP 0x175 #define INTEL_MSR_SYSENTER_EIP 0x176 #define INTEL_MSR_PERFMON_SEL0 0x186 #define INTEL_MSR_PERFMON_SEL0_ENABLE (1 << 22) #define AMD_EFER_SCE (1L << 0) /* SYSCALL/SYSRET enabled */ #define AMD_MSR_EFER 0xC0000080 /* extended features msr */ #define AMD_MSR_STAR 0xC0000081 /* SYSCALL params msr */ /* trap styles recorded on kernel entry and exit */ #define KTS_NONE 1 /* invalid */ #define KTS_INT_HARD 2 /* exception / hard interrupt */ #define KTS_INT_ORIG 3 /* soft interrupt from libc */ #define KTS_INT_UM 4 /* soft interrupt from usermapped code */ #define KTS_FULLCONTEXT 5 /* must restore full context */ #define KTS_SYSENTER 6 /* SYSENTER instruction (usermapped) */ #define KTS_SYSCALL 7 /* SYSCALL instruction (usermapped) */ #endif /* _I386_ACONST_H */