[src/trunk]: src/sys/arch/evbarm/tegra Don't try to use memory above 4GB PA.

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

details:   https://anonhg.NetBSD.org/src/rev/de8fee14930b
branches:  trunk
changeset: 824181:de8fee14930b
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri May 26 18:58:55 2017 +0000

description:
Don't try to use memory above 4GB PA.

diffstat:

 sys/arch/evbarm/tegra/tegra_machdep.c |  19 +++++++++++--------
 1 files changed, 11 insertions(+), 8 deletions(-)

diffs (65 lines):

diff -r 96185880263b -r de8fee14930b sys/arch/evbarm/tegra/tegra_machdep.c
--- a/sys/arch/evbarm/tegra/tegra_machdep.c     Fri May 26 18:56:27 2017 +0000
+++ b/sys/arch/evbarm/tegra/tegra_machdep.c     Fri May 26 18:58:55 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_machdep.c,v 1.41 2017/05/26 00:15:12 jmcneill Exp $ */
+/* $NetBSD: tegra_machdep.c,v 1.42 2017/05/26 18:58:55 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_machdep.c,v 1.41 2017/05/26 00:15:12 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_machdep.c,v 1.42 2017/05/26 18:58:55 jmcneill Exp $");
 
 #include "opt_tegra.h"
 #include "opt_machdep.h"
@@ -225,8 +225,7 @@
 u_int
 initarm(void *arg)
 {
-       bus_addr_t memory_addr;
-       bus_size_t memory_size;
+       uint64_t memory_addr, memory_size;
        psize_t ram_size = 0;
        DPRINT("initarm:");
 
@@ -285,20 +284,24 @@
                KERNEL_BASE, KERNEL_VM_BASE, KERNEL_VM_BASE - KERNEL_BASE, KERNEL_BASE_VOFFSET);
 
        const int memory = OF_finddevice("/memory");
-       if (fdtbus_get_reg(memory, 0, &memory_addr, &memory_size) != 0)
+       if (fdtbus_get_reg64(memory, 0, &memory_addr, &memory_size) != 0)
                panic("Cannot determine memory size");
 
        DPRINTF("FDT memory node = %d, addr %llx, size %llu\n",
            memory, (unsigned long long)memory_addr,
            (unsigned long long)memory_size);
 
-       ram_size = memory_size;
+       /* Cannot map memory above 4GB */
+       if (memory_addr + memory_size > 0x100000000)
+               memory_size = 0x100000000 - memory_addr;
+
+       ram_size = (bus_size_t)memory_size;
 
 #ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
        const bool mapallmem_p = true;
 #ifndef PMAP_NEED_ALLOC_POOLPAGE
        if (ram_size > KERNEL_VM_BASE - KERNEL_BASE) {
-               printf("%s: dropping RAM size from %luMB to %uMB\n",
+               DPRINTF("%s: dropping RAM size from %luMB to %uMB\n",
                    __func__, (unsigned long) (ram_size >> 20),     
                    (KERNEL_VM_BASE - KERNEL_BASE) >> 20);
                ram_size = KERNEL_VM_BASE - KERNEL_BASE;
@@ -325,7 +328,7 @@
 
        /* Fake bootconfig structure for the benefit of pmap.c. */
        bootconfig.dramblocks = 1;
-       bootconfig.dram[0].address = memory_addr;
+       bootconfig.dram[0].address = (bus_addr_t)memory_addr;
        bootconfig.dram[0].pages = ram_size / PAGE_SIZE;
 
        KASSERT((armreg_pfr1_read() & ARM_PFR1_SEC_MASK) != 0);