[src/netbsd-9]: src/sys/arch/aarch64/aarch64 Pull up following revision(s) (r...

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

details:   https://anonhg.NetBSD.org/src/rev/84ec8753d833
branches:  netbsd-9
changeset: 962991:84ec8753d833
user:      martin <martin%NetBSD.org@localhost>
date:      Sun Sep 22 10:36:30 2019 +0000

description:
Pull up following revision(s) (requested by ryo in ticket #215):

        sys/arch/aarch64/aarch64/aarch64_machdep.c: revision 1.30
        sys/arch/aarch64/aarch64/aarch64_machdep.c: revision 1.31
        sys/arch/aarch64/aarch64/aarch64_machdep.c: revision 1.29

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

 -

use L1-L3 blocks/pages for KSEG mappings to fit dramblocks exactly.
r1.29 and this changes avoid over cache prefetch problem (perhaps) with PMAP_MAP_POOLPAGE/KSEG on CortexA72, and be more stable for rockpro64.

 -

used L3 even if L2 could cover the range. fix to use larger block if possible good enough.
pointed out by jmcneill@. thanks.

diffstat:

 sys/arch/aarch64/aarch64/aarch64_machdep.c |  85 +++++++++++++++++++++++++++--
 1 files changed, 77 insertions(+), 8 deletions(-)

diffs (123 lines):

diff -r 711c5d5aced9 -r 84ec8753d833 sys/arch/aarch64/aarch64/aarch64_machdep.c
--- a/sys/arch/aarch64/aarch64/aarch64_machdep.c        Sun Sep 22 10:32:38 2019 +0000
+++ b/sys/arch/aarch64/aarch64/aarch64_machdep.c        Sun Sep 22 10:36:30 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 1.28.4.1 2019/09/22 10:36:30 martin 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 1.28.4.1 2019/09/22 10:36:30 martin Exp $");
 
 #include "opt_arm_debug.h"
 #include "opt_ddb.h"
@@ -112,12 +112,13 @@
 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[];
+       u_int blk;
 
        vaddr_t kernstart = trunc_page((vaddr_t)__kernel_text);
        vaddr_t kernend = round_page((vaddr_t)_end);
@@ -127,16 +128,84 @@
        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);
+       for (blk = 0; blk < bootconfig.dramblocks; blk++) {
+               uint64_t start, end, left, mapsize, nblocks;
+
+               start = trunc_page(bootconfig.dram[blk].address);
+               end = round_page(bootconfig.dram[blk].address +
+                   (uint64_t)bootconfig.dram[blk].pages * PAGE_SIZE);
+               left = end - start;
+
+               /* align the start address to L2 blocksize */
+               nblocks = ulmin(left / L3_SIZE,
+                   Ln_ENTRIES - __SHIFTOUT(start, L3_ADDR_BITS));
+               if (((start & L3_ADDR_BITS) != 0) && (nblocks > 0)) {
+                       mapsize = nblocks * L3_SIZE;
+                       VPRINTF("Creating KSEG tables for %016lx-%016lx (L3)\n",
+                           start, start + mapsize - 1);
+                       pmapboot_enter(AARCH64_PA_TO_KVA(start), start,
+                           mapsize, L3_SIZE, ksegattr,
+                           PMAPBOOT_ENTER_NOOVERWRITE, bootpage_alloc, NULL);
+
+                       start += mapsize;
+                       left -= mapsize;
+               }
+
+               /* align the start address to L1 blocksize */
+               nblocks = ulmin(left / L2_SIZE,
+                   Ln_ENTRIES - __SHIFTOUT(start, L2_ADDR_BITS));
+               if (((start & L2_ADDR_BITS) != 0) && (nblocks > 0)) {
+                       mapsize = nblocks * L2_SIZE;
+                       VPRINTF("Creating KSEG tables for %016lx-%016lx (L2)\n",
+                           start, start + mapsize - 1);
+                       pmapboot_enter(AARCH64_PA_TO_KVA(start), start,
+                           mapsize, L2_SIZE, ksegattr,
+                           PMAPBOOT_ENTER_NOOVERWRITE, bootpage_alloc, NULL);
+                       start += mapsize;
+                       left -= mapsize;
+               }
+
+               nblocks = left / L1_SIZE;
+               if (nblocks > 0) {
+                       mapsize = nblocks * L1_SIZE;
+                       VPRINTF("Creating KSEG tables for %016lx-%016lx (L1)\n",
+                           start, start + mapsize - 1);
+                       pmapboot_enter(AARCH64_PA_TO_KVA(start), start,
+                           mapsize, L1_SIZE, ksegattr,
+                           PMAPBOOT_ENTER_NOOVERWRITE, bootpage_alloc, NULL);
+                       start += mapsize;
+                       left -= mapsize;
+               }
+
+               if ((left & L2_ADDR_BITS) != 0) {
+                       nblocks = left / L2_SIZE;
+                       mapsize = nblocks * L2_SIZE;
+                       VPRINTF("Creating KSEG tables for %016lx-%016lx (L2)\n",
+                           start, start + mapsize - 1);
+                       pmapboot_enter(AARCH64_PA_TO_KVA(start), start,
+                           mapsize, L2_SIZE, ksegattr,
+                           PMAPBOOT_ENTER_NOOVERWRITE, bootpage_alloc, NULL);
+                       start += mapsize;
+                       left -= mapsize;
+               }
+
+               if ((left & L3_ADDR_BITS) != 0) {
+                       nblocks = left / L3_SIZE;
+                       mapsize = nblocks * L3_SIZE;
+                       VPRINTF("Creating KSEG tables for %016lx-%016lx (L3)\n",
+                           start, start + mapsize - 1);
+                       pmapboot_enter(AARCH64_PA_TO_KVA(start), start,
+                           mapsize, L3_SIZE, ksegattr,
+                           PMAPBOOT_ENTER_NOOVERWRITE, bootpage_alloc, NULL);
+                       start += mapsize;
+                       left -= mapsize;
+               }
+       }
        aarch64_tlbi_all();
 
        /*