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If LOADER_BZIP2_SUPPORT is defined allocate heap in the 1MB-4MB range to

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provide enough room for decompression (up to 2.5MB is necessary). This
should be safe to do since we load i386 kernels after 8MB mark now, so
that 16MB is the minimum amount of RAM necessary to even boot FreeBSD.

This makes bzip2-support  practically useable.
This commit is contained in:
Maxim Sobolev 2005-12-19 09:26:42 +00:00
parent 915dad0e92
commit f668cd5df7
1 changed files with 13 additions and 2 deletions
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15
sys/boot/i386/loader/main.c
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@ -72,6 +72,9 @@ extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
/* XXX debugging */
extern char end[];
static void *heap_top;
static void *heap_bottom;
int
main(void)
{
@ -88,7 +91,14 @@ main(void)
*/
bios_getmem();
setheap((void *)end, (void *)bios_basemem);
#ifdef LOADER_BZIP2_SUPPORT
heap_top = PTOV(0x400000);
heap_bottom = PTOV(0x100000);
#else
heap_top = (void *)bios_basemem;
heap_bottom = (void *)end;
#endif
setheap(heap_bottom, heap_top);
/*
* XXX Chicken-and-egg problem; we want to have console output early, but some
@ -269,7 +279,8 @@ static int
command_heap(int argc, char *argv[])
{
mallocstats();
printf("heap base at %p, top at %p\n", end, sbrk(0));
printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom,
sbrk(0), heap_top);
return(CMD_OK);
}