Date: Sat, 14 Dec 2013 01:34:24 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r259380 - stable/10/sys/arm/at91 Message-ID: <201312140134.rBE1YOdU025015@svn.freebsd.org>
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Author: ian Date: Sat Dec 14 01:34:24 2013 New Revision: 259380 URL: http://svnweb.freebsd.org/changeset/base/259380 Log: 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... Modified: stable/10/sys/arm/at91/at91_machdep.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/arm/at91/at91_machdep.c ============================================================================== --- stable/10/sys/arm/at91/at91_machdep.c Sat Dec 14 01:15:26 2013 (r259379) +++ stable/10/sys/arm/at91/at91_machdep.c Sat Dec 14 01:34:24 2013 (r259380) @@ -633,7 +633,8 @@ 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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