[src/trunk]: src/sys/arch/evbarm/bcm53xx If there is more than 256MB of ram, ...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/242e70b9861b
branches:  trunk
changeset: 782132:242e70b9861b
user:      matt <matt%NetBSD.org@localhost>
date:      Wed Oct 17 20:20:54 2012 +0000

description:
If there is more than 256MB of ram, add the first 256MB into a separate
VM freelist and specifiy that PMAP_ALLOC_POOLPAGE allocate using that freelist.

diffstat:

 sys/arch/evbarm/bcm53xx/bcm53xx_machdep.c |  25 ++++++++++++++++++++++---
 1 files changed, 22 insertions(+), 3 deletions(-)

diffs (61 lines):

diff -r d84d77130dd5 -r 242e70b9861b sys/arch/evbarm/bcm53xx/bcm53xx_machdep.c
--- a/sys/arch/evbarm/bcm53xx/bcm53xx_machdep.c Wed Oct 17 20:19:55 2012 +0000
+++ b/sys/arch/evbarm/bcm53xx/bcm53xx_machdep.c Wed Oct 17 20:20:54 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcm53xx_machdep.c,v 1.4 2012/10/07 19:17:24 matt Exp $ */
+/*     $NetBSD: bcm53xx_machdep.c,v 1.5 2012/10/17 20:20:54 matt Exp $ */
 
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -33,7 +33,7 @@
 #define IDM_PRIVATE
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm53xx_machdep.c,v 1.4 2012/10/07 19:17:24 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm53xx_machdep.c,v 1.5 2012/10/17 20:20:54 matt Exp $");
 
 #include "opt_evbarm_boardtype.h"
 #include "opt_broadcom.h"
@@ -172,6 +172,13 @@
        { 0, 0, 0, 0, 0 }
 };
 
+static const struct boot_physmem bp_first256 = {
+       .bp_start = 0x80000000 / NBPG,
+       .bp_pages = 0x10000000 / NBPG,
+       .bp_freelist = VM_FREELIST_ISADMA,
+       .bp_flags = 0,
+};
+
 /*
  * u_int initarm(...)
  *
@@ -238,6 +245,7 @@
 
        psize_t memsize = bcm53xx_memprobe();
        //memsize = 512*1024*1024;
+       const bool bigmem_p = (memsize >> 20) > 256; 
 
        arm32_bootmem_init(KERN_VTOPHYS(KERNEL_BASE), memsize,
            (paddr_t)KERNEL_BASE_phys);
@@ -259,8 +267,19 @@
        cpu_reset_address = bcm53xx_system_reset;
        /* we've a specific device_register routine */
        evbarm_device_register = bcm53xx_device_register;
+       if (bigmem_p) {
+               /*
+                * If we have more than 256MB
+                */
+               arm_poolpage_vmfreelist = bp_first256.bp_freelist;
+       }
 
-       return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, NULL, 0);
+       /*
+        * If we have more than 256MB of RAM, set aside the first 256MB for
+        * non-default VM allocations.
+        */
+       return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE,
+           (bigmem_p ? &bp_first256 : NULL), (bigmem_p ? 1 : 0));
 }
 
 void