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Diffstat (limited to 'sys/arch/amd64/stand/libsa/memprobe.c')
-rw-r--r--sys/arch/amd64/stand/libsa/memprobe.c148
1 files changed, 79 insertions, 69 deletions
diff --git a/sys/arch/amd64/stand/libsa/memprobe.c b/sys/arch/amd64/stand/libsa/memprobe.c
index d87968c8b1a..a890bea4695 100644
--- a/sys/arch/amd64/stand/libsa/memprobe.c
+++ b/sys/arch/amd64/stand/libsa/memprobe.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: memprobe.c,v 1.10 2010/12/06 22:51:45 jasper Exp $ */
+/* $OpenBSD: memprobe.c,v 1.11 2012/10/30 14:06:29 jsing Exp $ */
/*
* Copyright (c) 1997-1999 Michael Shalayeff
@@ -14,8 +14,8 @@
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
@@ -37,7 +37,8 @@
u_int cnvmem, extmem; /* XXX - compatibility */
-/* Check gateA20
+/*
+ * Check gateA20
*
* A sanity check.
*/
@@ -49,18 +50,19 @@ checkA20(void)
int st;
/* Simple check */
- if(*p != *q)
- return(1);
+ if (*p != *q)
+ return 1;
/* Complex check */
*p = ~(*p);
st = (*p != *q);
*p = ~(*p);
- return(st);
+ return st;
}
-/* BIOS int 15, AX=E820
+/*
+ * BIOS int 15, AX=E820
*
* This is the "preferred" method.
*/
@@ -72,30 +74,31 @@ bios_E820(bios_memmap_t *mp)
do {
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" (((u_int)mp) & 0xF)
- : "cc", "memory");
- off = BIOS_regs.biosr_bx;
+ : "=a" (sig), "=d" (rc), "=b" (off)
+ : "0" (0xE820), "1" (0x534d4150), "b" (off),
+ "c" (sizeof(*mp)), "D" (((u_int)mp) & 0xf)
+ : "cc", "memory");
+ off = BIOS_regs.biosr_bx;
- if (rc & 0xff || sig != 0x534d4150)
- break;
- gotcha++;
- if (!mp->type)
- mp->type = BIOS_MAP_RES;
- mp++;
+ if (rc & 0xff || sig != 0x534d4150)
+ break;
+ gotcha++;
+ if (!mp->type)
+ mp->type = BIOS_MAP_RES;
+ mp++;
} while (off);
if (!gotcha)
- return (NULL);
+ return NULL;
#ifdef DEBUG
printf("0x15[E820] ");
#endif
- return (mp);
+ return mp;
}
#if 0
-/* BIOS int 15, AX=E801
+/*
+ * BIOS int 15, AX=E801
*
* Only used if int 15, AX=E820 does not work.
* This should work for more than 64MB on most
@@ -111,25 +114,27 @@ bios_E801(bios_memmap_t *mp)
/* Test for possibility of 0xE801 */
info = getSYSCONFaddr();
- if(!info) return(NULL);
+ if (!info)
+ return NULL;
/* XXX - Should test model/submodel/rev here */
printf("model(%d,%d,%d)", info[2], info[3], info[4]);
/* Check for 94 or later bios */
info = (void *)0xFFFFB;
- if(info[0] == '9' && info[1] <= '3') return(NULL);
+ if (info[0] == '9' && info[1] <= '3')
+ return NULL;
/* We might have this call */
__asm __volatile(DOINT(0x15) "; mov %%ax, %%si; setc %b0"
- : "=a" (rc), "=S" (m1), "=b" (m2), "=c" (m3), "=d" (m4)
- : "0" (0xE801));
+ : "=a" (rc), "=S" (m1), "=b" (m2), "=c" (m3), "=d" (m4)
+ : "0" (0xE801));
/* Test for failure */
- if(rc & 0xff)
- return (NULL);
+ if (rc & 0xff)
+ return NULL;
/* Fixup for screwed up machines */
- if(m1 == 0){
+ if (m1 == 0) {
m1 = m3;
m2 = m4;
}
@@ -150,7 +155,8 @@ bios_E801(bios_memmap_t *mp)
}
#endif
-/* BIOS int 15, AX=8800
+/*
+ * BIOS int 15, AX=8800
*
* Only used if int 15, AX=E801 does not work.
* Machines with this are restricted to 64MB.
@@ -161,10 +167,10 @@ bios_8800(bios_memmap_t *mp)
int rc, mem;
__asm __volatile(DOINT(0x15) "; setc %b0"
- : "=c" (rc), "=a" (mem) : "a" (0x8800));
+ : "=c" (rc), "=a" (mem) : "a" (0x8800));
- if(rc & 0xff)
- return (NULL);
+ if (rc & 0xff)
+ return NULL;
#ifdef DEBUG
printf("0x15[8800] ");
#endif
@@ -176,7 +182,8 @@ bios_8800(bios_memmap_t *mp)
return ++mp;
}
-/* BIOS int 0x12 Get Conventional Memory
+/*
+ * BIOS int 0x12 Get Conventional Memory
*
* Only used if int 15, AX=E820 does not work.
*/
@@ -198,7 +205,8 @@ bios_int12(bios_memmap_t *mp)
}
-/* addrprobe(kloc): Probe memory at address kloc * 1024.
+/*
+ * addrprobe(kloc): Probe memory at address kloc * 1024.
*
* This is a hack, but it seems to work ok. Maybe this is
* the *real* way that you are supposed to do probing???
@@ -228,23 +236,23 @@ addrprobe(u_int kloc)
save[0] = *loc;
/* Probe address */
- for(i = 0; i < nitems(addrprobe_pat); i++){
+ for (i = 0; i < nitems(addrprobe_pat); i++) {
*loc = addrprobe_pat[i];
- if(*loc != addrprobe_pat[i])
+ if (*loc != addrprobe_pat[i])
ret++;
}
*loc = save[0];
if (!ret) {
/* Write address */
- for(i = 0; i < nitems(addrprobe_pat); i++) {
+ for (i = 0; i < nitems(addrprobe_pat); i++) {
save[i] = loc[i];
loc[i] = addrprobe_pat[i];
}
/* Read address */
- for(i = 0; i < nitems(addrprobe_pat); i++) {
- if(loc[i] != addrprobe_pat[i])
+ for (i = 0; i < nitems(addrprobe_pat); i++) {
+ if (loc[i] != addrprobe_pat[i])
ret++;
loc[i] = save[i];
}
@@ -253,7 +261,8 @@ addrprobe(u_int kloc)
return ret;
}
-/* Probe for all extended memory.
+/*
+ * Probe for all extended memory.
*
* This is only used as a last resort. If we resort to this
* routine, we are getting pretty desperate. Hopefully nobody
@@ -269,13 +278,14 @@ badprobe(bios_memmap_t *mp)
#ifdef DEBUG
printf("scan ");
#endif
- /* probe extended memory
+ /*
+ * probe extended memory
*
* There is no need to do this in assembly language. This is
* much easier to debug in C anyways.
*/
- for(ram = 1024; ram < 512 * 1024; ram += 4)
- if(addrprobe(ram))
+ for (ram = 1024; ram < 512 * 1024; ram += 4)
+ if (addrprobe(ram))
break;
mp->addr = 1024 * 1024;
@@ -298,17 +308,17 @@ memprobe(void)
printf(" mem[");
#endif
- if(!(pm = bios_E820(bios_memmap))) {
+ if ((pm = bios_E820(bios_memmap)) == NULL) {
im = bios_int12(bios_memmap);
#if 0
pm = bios_E801(im);
- if (!pm)
+ if (pm == NULL)
#endif
pm = bios_8800(im);
- if (!pm)
+ if (pm == NULL)
pm = badprobe(im);
- if (!pm) {
- printf (" No Extended memory detected.");
+ if (pm == NULL) {
+ printf(" No Extended memory detected.");
pm = im;
}
}
@@ -322,9 +332,9 @@ memprobe(void)
/* XXX - Compatibility, remove later (smpprobe() relies on it) */
extmem = cnvmem = 0;
- for(im = bios_memmap; im->type != BIOS_MAP_END; im++) {
+ for (im = bios_memmap; im->type != BIOS_MAP_END; im++) {
/* Count only "good" memory chunks 12K and up in size */
- if ((im->type == BIOS_MAP_FREE) && (im->size >= 12*1024)) {
+ if ((im->type == BIOS_MAP_FREE) && (im->size >= 12 * 1024)) {
if (im->size > 1024 * 1024)
printf("%uM ", (u_int)(im->size /
(1024 * 1024)));
@@ -341,17 +351,17 @@ memprobe(void)
* We ignore "good" memory in the 640K-1M hole.
* We drop "machine {cnvmem,extmem}" commands.
*/
- if(im->addr < IOM_BEGIN)
+ if (im->addr < IOM_BEGIN)
cnvmem = max(cnvmem,
im->addr + im->size) / 1024;
- if(im->addr >= IOM_END
- && (im->addr/1024) == (extmem + 1024)) {
+ if (im->addr >= IOM_END &&
+ (im->addr / 1024) == (extmem + 1024))
extmem += im->size / 1024;
- }
}
}
- /* Adjust extmem to be no more than 4G (which it usually is not
+ /*
+ * Adjust extmem to be no more than 4G (which it usually is not
* anyways). In order for an x86 type machine (amd64/etc) to use
* more than 4GB of memory, it will need to grok and use the bios
* memory map we pass it. Note that above we only count CONTIGUOUS
@@ -359,8 +369,8 @@ memprobe(void)
*
* extmem is in KB, and we have 4GB - 1MB (base/io hole) worth of it.
*/
- if(extmem > 4*1024*1024 - 1024)
- extmem = 4*1024*1024 - 1024;
+ if (extmem > 4 * 1024 * 1024 - 1024)
+ extmem = 4 * 1024 * 1024 - 1024;
/* Check if gate A20 is on */
printf("a20=o%s] ", checkA20()? "n" : "ff!");
@@ -373,15 +383,15 @@ dump_biosmem(bios_memmap_t *tm)
register bios_memmap_t *p;
register u_int total = 0;
- if (!tm)
+ if (tm == NULL)
tm = bios_memmap;
- for(p = tm; p->type != BIOS_MAP_END; p++) {
- printf("Region %ld: type %u at 0x%llx for %uKB\n",
+ for (p = tm; p->type != BIOS_MAP_END; p++) {
+ printf("Region %ld: type %u at 0x%llx for %uKB\n",
(long)(p - tm), p->type, p->addr,
(u_int)(p->size / 1024));
- if(p->type == BIOS_MAP_FREE)
+ if (p->type == BIOS_MAP_FREE)
total += p->size / 1024;
}
@@ -422,8 +432,8 @@ mem_delete(long long sa, long long ea)
/* can we eat it as a whole? */
if ((sa - sp) <= NBPG && (ep - ea) <= NBPG) {
- bcopy (p + 1, p, (char *)bios_memmap +
- sizeof(bios_memmap) - (char *)p);
+ bcopy(p + 1, p, (char *)bios_memmap +
+ sizeof(bios_memmap) - (char *)p);
break;
/* eat head or legs */
} else if (sa <= sp && sp < ea) {
@@ -435,9 +445,9 @@ mem_delete(long long sa, long long ea)
break;
} else if (sp < sa && ea < ep) {
/* bite in half */
- bcopy (p, p + 1, (char *)bios_memmap +
- sizeof(bios_memmap) - (char *)p -
- sizeof(bios_memmap[0]));
+ bcopy(p, p + 1, (char *)bios_memmap +
+ sizeof(bios_memmap) - (char *)p -
+ sizeof(bios_memmap[0]));
p[1].addr = ea;
p[1].size = ep - ea;
p->size = sa - sp;
@@ -470,8 +480,8 @@ mem_add(long long sa, long long ea)
break;
} else if (ea < sp) {
/* insert before */
- bcopy (p, p + 1, (char *)bios_memmap +
- sizeof(bios_memmap) - (char *)(p - 1));
+ bcopy(p, p + 1, (char *)bios_memmap +
+ sizeof(bios_memmap) - (char *)(p - 1));
p->addr = sa;
p->size = ea - sa;
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 03:45:43 +0000