[src/trunk]: src/sys/arch/aarch64/aarch64 Do not assume that DRAM is linear w...

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

details:   https://anonhg.NetBSD.org/src/rev/90d392e3fa5a
branches:  trunk
changeset: 454149:90d392e3fa5a
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri Sep 06 20:52:57 2019 +0000

description:
Do not assume that DRAM is linear when creating KSEG mappings. Instead,
create L2 blocks to cover all ranges specified in the memory map.

diffstat:

 sys/arch/aarch64/aarch64/aarch64_machdep.c |  26 +++++++++++++++++---------
 1 files changed, 17 insertions(+), 9 deletions(-)

diffs (64 lines):

diff -r 2a355a908410 -r 90d392e3fa5a sys/arch/aarch64/aarch64/aarch64_machdep.c
--- a/sys/arch/aarch64/aarch64/aarch64_machdep.c        Fri Sep 06 19:05:04 2019 +0000
+++ b/sys/arch/aarch64/aarch64/aarch64_machdep.c        Fri Sep 06 20:52:57 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: aarch64_machdep.c,v 1.28 2019/01/27 02:08:36 pgoyette Exp $ */
+/* $NetBSD: aarch64_machdep.c,v 1.29 2019/09/06 20:52:57 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: aarch64_machdep.c,v 1.28 2019/01/27 02:08:36 pgoyette Exp $");
+__KERNEL_RCSID(1, "$NetBSD: aarch64_machdep.c,v 1.29 2019/09/06 20:52:57 jmcneill Exp $");
 
 #include "opt_arm_debug.h"
 #include "opt_ddb.h"
@@ -112,12 +112,14 @@
 long    dumplo = 0;
 
 void
-cpu_kernel_vm_init(uint64_t memory_start, uint64_t memory_size)
+cpu_kernel_vm_init(uint64_t memory_start __unused, uint64_t memory_size __unused)
 {
        extern char __kernel_text[];
        extern char _end[];
        extern char __data_start[];
        extern char __rodata_start[];
+       uint64_t start, end;
+       u_int blk;
 
        vaddr_t kernstart = trunc_page((vaddr_t)__kernel_text);
        vaddr_t kernend = round_page((vaddr_t)_end);
@@ -127,17 +129,23 @@
        vaddr_t rodata_start = (vaddr_t)__rodata_start;
 
        /* add KSEG mappings of whole memory */
-       VPRINTF("Creating KSEG tables for 0x%016lx-0x%016lx\n",
-           memory_start, memory_start + memory_size);
        const pt_entry_t ksegattr =
            LX_BLKPAG_ATTR_NORMAL_WB |
            LX_BLKPAG_AP_RW |
            LX_BLKPAG_PXN |
            LX_BLKPAG_UXN;
-       pmapboot_enter(AARCH64_PA_TO_KVA(memory_start), memory_start,
-           memory_size, L1_SIZE, ksegattr, PMAPBOOT_ENTER_NOOVERWRITE,
-           bootpage_alloc, NULL);
-       aarch64_tlbi_all();
+       for (blk = 0; blk < bootconfig.dramblocks; blk++) {
+               start = L2_TRUNC_BLOCK(bootconfig.dram[blk].address);
+               end = L2_ROUND_BLOCK(bootconfig.dram[blk].address +
+                   (uint64_t)bootconfig.dram[blk].pages * PAGE_SIZE);
+
+               VPRINTF("Creating KSEG tables for 0x%016lx-0x%016lx (L2)\n",
+                   start, end);
+               pmapboot_enter(AARCH64_PA_TO_KVA(start), start, 
+                   end - start, L2_SIZE, ksegattr, PMAPBOOT_ENTER_NOOVERWRITE,
+                   bootpage_alloc, NULL);
+               aarch64_tlbi_all();
+       }
 
        /*
         * at this point, whole kernel image is mapped as "rwx".