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Reserve more bootstrap kernel PT pages if options EXTENDED_MEMORY is defined 

for VA allocation in the extended memory probe function and possible 128MB
memory on 060turbo, as worksaround for x68k specific part of PR/45915.
Fixes GENERIC kernel panic on X68030 even without extended memory.
XXX: we should rather have proper probe function before pmap_bootstrap()

Tested on 060turbo with 128MB SIMM by Y.Sugahara, and also
tested on XM6i with 68030 and custom 128MB memory settings by isaki@.

Should be pulled up to netbsd-6.
This commit is contained in:
tsutsui 2012-02-25 02:43:08 +00:00
parent cff570f6d5
commit d404b3ae19
1 changed files with 16 additions and 2 deletions
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18
sys/arch/x68k/x68k/pmap_bootstrap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap_bootstrap.c,v 1.58 2012/02/10 06:28:39 mhitch Exp $ */
/* $NetBSD: pmap_bootstrap.c,v 1.59 2012/02/25 02:43:08 tsutsui Exp $ */
/*
* Copyright (c) 1991, 1993
@ -36,9 +36,10 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap_bootstrap.c,v 1.58 2012/02/10 06:28:39 mhitch Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap_bootstrap.c,v 1.59 2012/02/25 02:43:08 tsutsui Exp $");
#include "opt_m68k_arch.h"
#include "opt_extmem.h"
#include <sys/param.h>
#include <uvm/uvm_extern.h>
@ -124,6 +125,19 @@ pmap_bootstrap(paddr_t nextpa, paddr_t firstpa)
kptpa = nextpa;
nptpages = RELOC(Sysptsize, int) + howmany(RELOC(physmem, int), NPTEPG) +
(IIOMAPSIZE + NPTEPG - 1) / NPTEPG;
#ifdef EXTENDED_MEMORY
/*
* Current supported maximum EXTENDED_MEMORY is 128MB on 060turbo.
*/
#define MAX_EXTENDED_MEMORY (128 * 1024 * 1024)
nptpages += howmany(btoc(MAX_EXTENDED_MEMORY), NPTEPG);
/*
* mem_exist() in machdep.c needs two extra VA pages before pmap_init()
* to probe >16MB memory.
*/
nptpages += 1;
#endif
nextpa += nptpages * PAGE_SIZE;
/*