Date: Fri, 21 May 2010 16:58:52 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r208388 - head/sys/boot/i386/zfsboot Message-ID: <201005211658.o4LGwqDQ075491@svn.freebsd.org>
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Author: jhb Date: Fri May 21 16:58:52 2010 New Revision: 208388 URL: http://svn.freebsd.org/changeset/base/208388 Log: - Set 'dmadat' earlier so that we properly setup the heap if we fail to locate a high memory area for the heap using the SMAP. - Read the number of hard drive devices from the BIOS instead of hardcoding a limit of 128. Some BIOSes duplicate disk devices once you get beyond the maximum drive number. MFC after: 1 month Modified: head/sys/boot/i386/zfsboot/zfsboot.c Modified: head/sys/boot/i386/zfsboot/zfsboot.c ============================================================================== --- head/sys/boot/i386/zfsboot/zfsboot.c Fri May 21 16:32:14 2010 (r208387) +++ head/sys/boot/i386/zfsboot/zfsboot.c Fri May 21 16:58:52 2010 (r208388) @@ -94,6 +94,7 @@ __FBSDID("$FreeBSD$"); #define V86_CY(x) ((x) & 1) #define V86_ZR(x) ((x) & 0x40) +#define BIOS_NUMDRIVES 0x475 #define DRV_HARD 0x80 #define DRV_MASK 0x7f @@ -467,6 +468,7 @@ getstr(void) static inline void putc(int c) { + v86.ctl = 0; v86.addr = 0x10; v86.eax = 0xe00 | (c & 0xff); v86.ebx = 0x7; @@ -617,6 +619,8 @@ main(void) off_t off; struct dsk *dsk; + dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); + bios_getmem(); if (high_heap_size > 0) { @@ -627,9 +631,6 @@ main(void) heap_end = (char *) PTOV(bios_basemem); } - dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); - v86.ctl = V86_FLAGS; - dsk = malloc(sizeof(struct dsk)); dsk->drive = *(uint8_t *)PTOV(ARGS); dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; @@ -666,7 +667,7 @@ main(void) * will find any other available pools and it may fill in missing * vdevs for the boot pool. */ - for (i = 0; i < 128; i++) { + for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) { if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) continue; @@ -1157,6 +1158,7 @@ getc(int fn) * when no such key is pressed in reality. As far as I can tell, * this only happens shortly after a reboot. */ + v86.ctl = V86_FLAGS; v86.addr = 0x16; v86.eax = fn << 8; v86int();
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