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2 pj 1
/* Project:     OSLib
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 * Description: The OS Construction Kit
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 * Date:                1.6.2000
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 * Idea by:             Luca Abeni & Gerardo Lamastra
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 *
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 * OSLib is an SO project aimed at developing a common, easy-to-use
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 * low-level infrastructure for developing OS kernels and Embedded
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 * Applications; it partially derives from the HARTIK project but it
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 * currently is independently developed.
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 *
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 * OSLib is distributed under GPL License, and some of its code has
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 * been derived from the Linux kernel source; also some important
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 * ideas come from studying the DJGPP go32 extender.
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 *
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 * We acknowledge the Linux Community, Free Software Foundation,
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 * D.J. Delorie and all the other developers who believe in the
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 * freedom of software and ideas.
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 *
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 * For legalese, check out the included GPL license.
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 */
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/* Access the info stucture */
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#include <ll/i386/stdlib.h>
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#include <ll/i386/hw-func.h>
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#include <ll/i386/mb-info.h>
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#include <ll/i386/x-bios.h>
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FILE(X-Info);
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/*
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   The x_bios is stored in the low memory area and contains all the
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   stuff necessary to perform a BIOS call from PM; it can be accessed
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   using a linear pointer, which is returned by the following call!
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*/
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X_CALLBIOS * x_bios_address(void)
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{
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    X_CALLBIOS *a = (X_CALLBIOS *)GDT_read(X_CALLBIOS_SEL,NULL,NULL,NULL);
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    return (a);
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}
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/* Stuff information retrieving function */
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WORD X_version(void)
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{
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    X_CALLBIOS *x_bios = x_bios_address();
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    return(x_bios->_ver);
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}
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void X_meminfo(LIN_ADDR *b1,DWORD *s1,LIN_ADDR *b2,DWORD *s2)
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{
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    struct multiboot_info *mbi = mbi_address();
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    int x = 0;
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    if (mbi->flags & MB_INFO_BOOT_LOADER_NAME) {
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        char *name;
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        name = (char *) mbi->boot_loader_name;
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        if (*name == 'X') {
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            x = 1;
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        }
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    }
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    if (x) {
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        if (b1 != NULL) *b1 = (LIN_ADDR)mbi->mem_upbase;
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        if (s1 != NULL) *s1 = mbi->mem_upper * 1024;
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        if (b2 != NULL) *b2 = (LIN_ADDR)mbi->mem_lowbase;
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        if (s2 != NULL) *s2 = mbi->mem_lower * 1024;
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    } else {
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        if (b1 != NULL) *b1 = (LIN_ADDR)0x100000;
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        if (s1 != NULL) *s1 = mbi->mem_upper * 1024;
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        if (b2 != NULL) *b2 = (LIN_ADDR)0x4000;
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        if (s2 != NULL) *s2 = mbi->mem_lower * 1024;
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    }
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/*
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#ifdef __OLD_MB__
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    if (b1 != NULL) *b1 = 0x100000;
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    if (s1 != NULL) *s1 = mbi->mem_upper;
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    if (b2 != NULL) *b2 = 0x4000;
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    if (s2 != NULL) *s2 = mbi->mem_lower;
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#else    
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    if (b1 != NULL) *b1 = mbi->mem_upbase;
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    if (s1 != NULL) *s1 = mbi->mem_upper;
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    if (b2 != NULL) *b2 = mbi->mem_lowbase;
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    if (s2 != NULL) *s2 = mbi->mem_lower;
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#endif
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*/
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}
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#ifdef CHECK
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#include <cons.h>
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/* Alert if a wrong addressing is intercepted   */
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/* Used only for debug purposes                 */
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void check_addr(void *addr,char *caller)
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{
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    extern DWORD _stktop;
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    if ((DWORD)(addr) < _stktop) {
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        cprintf("CRISIS! Addr : %lx(%lx) Caller was %s\n",(DWORD)(addr),_stktop,caller);
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    }
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}
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#endif