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/* Project:     OSLib
 * Description: The OS Construction Kit
 * Date:                1.6.2000
 * Idea by:             Luca Abeni & Gerardo Lamastra
 *
 * OSLib is an SO project aimed at developing a common, easy-to-use
 * low-level infrastructure for developing OS kernels and Embedded
 * Applications; it partially derives from the HARTIK project but it
 * currently is independently developed.
 *
 * OSLib is distributed under GPL License, and some of its code has
 * been derived from the Linux kernel source; also some important
 * ideas come from studying the DJGPP go32 extender.
 *
 * We acknowledge the Linux Community, Free Software Foundation,
 * D.J. Delorie and all the other developers who believe in the
 * freedom of software and ideas.
 *
 * For legalese, check out the included GPL license.
 */

/*      Code & data fot CPU identification      */

#ifndef __LL_I386_HW_ARCH_H__
#define __LL_I386_HW_ARCH_H__

#include <ll/i386/defs.h>
BEGIN_DEF

#include <ll/i386/hw-data.h>
#include <ll/i386/hw-instr.h>
#include <ll/i386/hw-func.h>

/* The following structure is filled up by the ll_init() and can be     */
/* read by the kernel modules to know about the architecture            */
/* Each time a new hardware CPU is added to the ll layer, you have to   */
/* define a new XXX_ARCH structure, whose first field is a char *arch   */
/* This is used to identify the architecture, then subsequent field     */
/* can be decoded!!                                                     */

/* WARNING: I tried to use bitfields, but this caused am INTO error?!?  */
/* only when using GNU-C!! So i preferred to use standard DWORD flags   */

/* Capabilities */
#define LL_X86_HAS_INVLPG       0x01
#define LL_X86_HAS_CPUID        0x02
#define LL_X86_HAS_FPU          0x04
#define LL_X86_INTERNAL_FPU     0x08
#define LL_X86_HAS_TSTAMP       0x10

/* Bugs */
#define LL_X86_FDIV_BUG         0x01
#define LL_X86_F00F_BUG         0x02

typedef struct {
    char *arch;
    int cpu;    /* 0,1,2,3,4,5,6 ->
                        8086/8,80186,80286,80386,80486,P5,PII o Overdrive */
    int fpu;    /* 0,1,2,3 -> None,8087,80287,80387 */
    char *model; /* Dx, Dx2, ... */
    char vendor[12]; /* Intel, Cyrix, AMD or unknown */
    DWORD capabilities;
    DWORD bugs;
    /* BUGs!! Warning: Currently, no workaround is available!
    */
    int f00f_bug;
    int fdiv_bug;
} X86_ARCH;

struct ll_cpuInfo {
        DWORD X86_cpu;
        DWORD X86_cpuIdFlag;
        DWORD X86_vendor_1;
        DWORD X86_vendor_2;
        DWORD X86_vendor_3;
        DWORD X86_signature;
        DWORD X86_IntelFeature_1;
        DWORD X86_IntelFeature_2;
        DWORD X86_StandardFeature;
};

typedef struct {
    char *arch;
    /* Tonino, fill up this stuff! */
} AXP_ARCH;

typedef union {
    char *arch;
    X86_ARCH x86;
    AXP_ARCH axp;
} LL_ARCH;

void X86_get_CPU(struct ll_cpuInfo *p);
void X86_get_FPU(void);
int X86_is386(void);
int X86_isCyrix(void);
int X86_hasCPUID(void);
void X86_enable_cyrix_cpuid(void);

extern LL_ARCH ll_arch;

END_DEF
#endif /* __LL_I386_HW_ARCH_H__ */