diff options
Diffstat (limited to 'sys/arch/i386/stand/libsa/memprobe.c')
| -rw-r--r-- | sys/arch/i386/stand/libsa/memprobe.c | 64 |
1 files changed, 37 insertions, 27 deletions
diff --git a/sys/arch/i386/stand/libsa/memprobe.c b/sys/arch/i386/stand/libsa/memprobe.c index d9354dea66c..b28de7dfbc2 100644 --- a/sys/arch/i386/stand/libsa/memprobe.c +++ b/sys/arch/i386/stand/libsa/memprobe.c @@ -1,4 +1,4 @@ -/* $OpenBSD: memprobe.c,v 1.19 1997/10/20 20:20:45 mickey Exp $ */ +/* $OpenBSD: memprobe.c,v 1.20 1997/10/21 23:47:26 mickey Exp $ */ /* * Copyright (c) 1997 Tobias Weingartner, Michael Shalayeff @@ -34,12 +34,12 @@ #include <sys/param.h> #include <machine/biosvar.h> +#include <stand/boot/bootarg.h> #include "libsa.h" static int addrprobe __P((u_int)); u_int cnvmem, extmem; /* XXX - compatibility */ bios_memmap_t *memory_map; -u_int memap_size = 0; /* BIOS int 15, AX=E820 * @@ -49,25 +49,29 @@ static __inline bios_memmap_t * bios_E820(mp) register bios_memmap_t *mp; { - int rc = 0, off = 0, sig; + int rc, off = 0, sig, gotcha = 0; do { - BIOS_regs.biosr_es = ((unsigned)(mp) >> 4); + BIOS_regs.biosr_es = ((u_int)(mp) >> 4); __asm __volatile(DOINT(0x15) "; setc %b1" : "=a" (sig), "=d" (rc), "=b" (off) : "0" (0xE820), "1" (0x534d4150), "b" (off), - "c" (sizeof(*mp)), "D" (((unsigned)mp) & 0xF) + "c" (sizeof(*mp)), "D" (((u_int)mp) & 0xF) : "cc", "memory"); off = BIOS_regs.biosr_bx; if (rc & 0xff || sig != 0x534d4150) - return (NULL); + break; + gotcha++; mp->size >>= 10; /* / 1024 */ mp++; } while (off); + if (!gotcha) + return (NULL); +#ifdef DEBUG printf("0x15[E820]"); - +#endif return (mp); } @@ -89,9 +93,9 @@ bios_E801(mp) /* Make a memory map from info */ if(rc & 0xff) return (NULL); - +#ifdef DEBUG printf("0x15[E801]"); - +#endif /* Fill out BIOS map */ mp->addr = (1024 * 1024); /* 1MB */ mp->size = (m1 & 0xffff); @@ -122,9 +126,9 @@ bios_8800(mp) if(rc & 0xff) return (NULL); - +#ifdef DEBUG printf("0x15[8800]"); - +#endif /* Fill out a BIOS_MAP */ mp->addr = 1024 * 1024; /* 1MB */ mp->size = mem & 0xffff; @@ -142,9 +146,9 @@ bios_int12(mp) register bios_memmap_t *mp; { int mem; - +#ifdef DEBUG printf(", 0x12\n"); - +#endif __asm __volatile(DOINT(0x12) : "=a" (mem) :: "%ecx", "%edx", "cc"); /* Fill out a bios_memmap_t */ @@ -226,8 +230,9 @@ badprobe(mp) register bios_memmap_t *mp; { int ram; - +#ifdef DEBUG printf("Scan"); +#endif /* probe extended memory * * There is no need to do this in assembly language. This is @@ -250,29 +255,34 @@ memprobe() static bios_memmap_t bm[32]; /* This is easier */ bios_memmap_t *pm = bm, *im; int total = 0; - +#ifdef DEBUG printf("Probing memory: "); - +#endif if(!(pm = bios_E820(bm))) { - pm = bios_E801(pm); - if(!pm) - pm = bios_8800(pm); - if(!pm) - pm = badprobe(pm); - pm = bios_int12(pm); + im = bios_int12(bm); + pm = bios_E801(im); + if (!pm) + pm = bios_8800(im); + if (!pm) + pm = badprobe(im); + if (!pm) { + printf ("No Extended memory detected."); + pm = im; + } } - +#ifdef DEBUG + printf("\n"); +#endif pm->type = BIOS_MAP_END; /* Register in global var */ - memory_map = bm; - memap_size = pm - bm + 1; - printf("\nmem0:"); + addbootarg(BOOTARG_MEMMAP, (pm - bm + 1) * sizeof(*bm), bm); + printf("mem0:"); /* Get total free memory */ for(im = bm; im->type != BIOS_MAP_END; im++) { if (im->type == BIOS_MAP_FREE) { total += im->size; - printf(" %luK", (long)im->size); + printf(" %luK", (u_long)im->size); } } printf("\n"); |