Date: Sun, 22 Dec 2013 20:42:08 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Warner Losh <imp@freebsd.org> Cc: svn-src-releng@freebsd.org, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r259746 - releng/10.0/sys/arm/at91 Message-ID: <CAJ-Vmo=Bq8grVH_zQ7GnDS2gVvU_YbqEjV1kkw4jMkGMSjQ8jg@mail.gmail.com> In-Reply-To: <201312222220.rBMMKI54055437@svn.freebsd.org> References: <201312222220.rBMMKI54055437@svn.freebsd.org>
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Are there any compile and/or run time checks to ensure that memory regions aren't overlapping and to bitch if they are? -a On 22 December 2013 14:20, Warner Losh <imp@freebsd.org> wrote: > Author: imp > Date: Sun Dec 22 22:20:17 2013 > New Revision: 259746 > URL: http://svnweb.freebsd.org/changeset/base/259746 > > Log: > Merge from stable/10 r259380: > > MFC r259038, r259039: > > Bump the maximum VM space from 3 * memory size to a fixed > 256MB. That's all we have room for since we map the hardware registers > starting at 0xd0000000. This allows my 64MB AT91SAM9G20 to boot again > after the unmmaped I/O changes were MFC'd at r251897. Other > subplatforms may need similar treatment. > > Although not strictly required to boot a 64MB board, bump > vm_max_virtual_address to be KERNVIRTADDR + 256MB. This allows some > future shock protection since the KVA requirements have gone up since > the unmapped changes have gone in, as well as preventing us from > overlapping with the hardware devices, which we map at 0xd0000000, > which we'd hit with anything more than 85MB... > > Approved by: re@ (gjb@) > > Modified: > releng/10.0/sys/arm/at91/at91_machdep.c > Directory Properties: > releng/10.0/ (props changed) > > Modified: releng/10.0/sys/arm/at91/at91_machdep.c > ============================================================================== > --- releng/10.0/sys/arm/at91/at91_machdep.c Sun Dec 22 21:53:08 2013 (r259745) > +++ releng/10.0/sys/arm/at91/at91_machdep.c Sun Dec 22 22:20:17 2013 (r259746) > @@ -631,7 +631,8 @@ initarm(struct arm_boot_params *abp) > > pmap_curmaxkvaddr = afterkern + L1_S_SIZE * (KERNEL_PT_KERN_NUM - 1); > arm_dump_avail_init(memsize, sizeof(dump_avail)/sizeof(dump_avail[0])); > - vm_max_kernel_address = KERNVIRTADDR + 3 * memsize; > + /* Always use the 256MB of KVA we have available between the kernel and devices */ > + vm_max_kernel_address = KERNVIRTADDR + (256 << 20); > pmap_bootstrap(freemempos, &kernel_l1pt); > msgbufp = (void*)msgbufpv.pv_va; > msgbufinit(msgbufp, msgbufsize);
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