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[src/trunk]: src/sys/arch/x86/x86 Introduce x86_load_region(), and explain a ...
details: https://anonhg.NetBSD.org/src/rev/6088cb8b69e4
branches: trunk
changeset: 346514:6088cb8b69e4
user: maxv <maxv%NetBSD.org@localhost>
date: Sat Jul 16 14:51:45 2016 +0000
description:
Introduce x86_load_region(), and explain a little what we are doing.
diffstat:
sys/arch/x86/x86/x86_machdep.c | 146 ++++++++++++++++------------------------
1 files changed, 57 insertions(+), 89 deletions(-)
diffs (208 lines):
diff -r 12a8fec86cb7 -r 6088cb8b69e4 sys/arch/x86/x86/x86_machdep.c
--- a/sys/arch/x86/x86/x86_machdep.c Sat Jul 16 13:47:01 2016 +0000
+++ b/sys/arch/x86/x86/x86_machdep.c Sat Jul 16 14:51:45 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: x86_machdep.c,v 1.70 2016/01/28 06:52:55 jnemeth Exp $ */
+/* $NetBSD: x86_machdep.c,v 1.71 2016/07/16 14:51:45 maxv Exp $ */
/*-
* Copyright (c) 2002, 2006, 2007 YAMAMOTO Takashi,
@@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: x86_machdep.c,v 1.70 2016/01/28 06:52:55 jnemeth Exp $");
+__KERNEL_RCSID(0, "$NetBSD: x86_machdep.c,v 1.71 2016/07/16 14:51:45 maxv Exp $");
#include "opt_modular.h"
#include "opt_physmem.h"
@@ -773,6 +773,49 @@
panic("no freelist for maximum address %"PRIx64, maxaddr);
}
+/*
+ * Load the physical memory region from seg_start to seg_end into the VM
+ * system.
+ */
+static void
+x86_load_region(uint64_t seg_start, uint64_t seg_end)
+{
+ unsigned int i;
+ uint64_t tmp;
+
+ i = __arraycount(x86_freelists);
+ while (i--) {
+ if (x86_freelists[i].limit <= seg_start)
+ continue;
+ if (x86_freelists[i].freelist == VM_FREELIST_DEFAULT)
+ continue;
+ tmp = MIN(x86_freelists[i].limit, seg_end);
+ if (tmp == seg_start)
+ continue;
+
+#ifdef DEBUG_MEMLOAD
+ printf("loading freelist %d 0x%"PRIx64"-0x%"PRIx64
+ " (0x%"PRIx64"-0x%"PRIx64")\n", x86_freelists[i].freelist,
+ seg_start, tmp, (uint64_t)atop(seg_start),
+ (uint64_t)atop(tmp));
+#endif
+
+ uvm_page_physload(atop(seg_start), atop(tmp), atop(seg_start),
+ atop(tmp), x86_freelists[i].freelist);
+ seg_start = tmp;
+ }
+
+ if (seg_start != seg_end) {
+#ifdef DEBUG_MEMLOAD
+ printf("loading default 0x%"PRIx64"-0x%"PRIx64
+ " (0x%"PRIx64"-0x%"PRIx64")\n", seg_start, seg_end,
+ (uint64_t)atop(seg_start), (uint64_t)atop(seg_end));
+#endif
+ uvm_page_physload(atop(seg_start), atop(seg_end),
+ atop(seg_start), atop(seg_end), VM_FREELIST_DEFAULT);
+ }
+}
+
int
initx86_load_memmap(paddr_t first_avail)
{
@@ -796,11 +839,11 @@
#endif
/*
- * Now, load the memory clusters (which have already been
- * rounded and truncated) into the VM system.
+ * Now, load the memory clusters (which have already been rounded and
+ * truncated) into the VM system.
*
- * NOTE: WE ASSUME THAT MEMORY STARTS AT 0 AND THAT THE KERNEL
- * IS LOADED AT IOM_END (1M).
+ * NOTE: we assume that memory starts at 0 and that the kernel is
+ * loaded at IOM_END (1MB).
*/
for (x = 0; x < mem_cluster_cnt; x++) {
const phys_ram_seg_t *cluster = &mem_clusters[x];
@@ -810,13 +853,11 @@
seg_start1 = 0;
seg_end1 = 0;
- /*
- * Skip memory before our available starting point.
- */
+ /* Skip memory before our available starting point. */
if (seg_end <= avail_start)
continue;
- if (avail_start >= seg_start && avail_start < seg_end) {
+ if (seg_start <= avail_start && avail_start < seg_end) {
if (seg_start != 0)
panic("init_x86_64: memory doesn't start at 0");
seg_start = avail_start;
@@ -825,8 +866,8 @@
}
/*
- * If this segment contains the kernel, split it
- * in two, around the kernel.
+ * If this segment contains the kernel, split it in two, around
+ * the kernel.
*/
if (seg_start <= IOM_END && first_avail <= seg_end) {
seg_start1 = first_avail;
@@ -837,92 +878,19 @@
/* First hunk */
if (seg_start != seg_end) {
- i = __arraycount(x86_freelists);
- while (i--) {
- uint64_t tmp;
-
- if (x86_freelists[i].limit <= seg_start)
- continue;
- if (x86_freelists[i].freelist ==
- VM_FREELIST_DEFAULT)
- continue;
- tmp = MIN(x86_freelists[i].limit, seg_end);
- if (tmp == seg_start)
- continue;
-#ifdef DEBUG_MEMLOAD
- printf("loading freelist %d"
- " 0x%"PRIx64"-0x%"PRIx64
- " (0x%"PRIx64"-0x%"PRIx64")\n",
- x86_freelists[i].freelist, seg_start, tmp,
- (uint64_t)atop(seg_start),
- (uint64_t)atop(tmp));
-#endif
- uvm_page_physload(atop(seg_start), atop(tmp),
- atop(seg_start), atop(tmp),
- x86_freelists[i].freelist);
- seg_start = tmp;
- }
-
- if (seg_start != seg_end) {
-#ifdef DEBUG_MEMLOAD
- printf("loading default 0x%"PRIx64"-0x%"PRIx64
- " (0x%"PRIx64"-0x%"PRIx64")\n",
- seg_start, seg_end,
- (uint64_t)atop(seg_start),
- (uint64_t)atop(seg_end));
-#endif
- uvm_page_physload(atop(seg_start),
- atop(seg_end), atop(seg_start),
- atop(seg_end), VM_FREELIST_DEFAULT);
- }
+ x86_load_region(seg_start, seg_end);
}
/* Second hunk */
if (seg_start1 != seg_end1) {
- i = __arraycount(x86_freelists);
- while (i--) {
- uint64_t tmp;
-
- if (x86_freelists[i].limit <= seg_start1)
- continue;
- if (x86_freelists[i].freelist ==
- VM_FREELIST_DEFAULT)
- continue;
- tmp = MIN(x86_freelists[i].limit, seg_end1);
- if (tmp == seg_start1)
- continue;
-#ifdef DEBUG_MEMLOAD
- printf("loading freelist %u"
- " 0x%"PRIx64"-0x%"PRIx64
- " (0x%"PRIx64"-0x%"PRIx64")\n",
- x86_freelists[i].freelist, seg_start1, tmp,
- (uint64_t)atop(seg_start1),
- (uint64_t)atop(tmp));
-#endif
- uvm_page_physload(atop(seg_start1), atop(tmp),
- atop(seg_start1), atop(tmp),
- x86_freelists[i].freelist);
- seg_start1 = tmp;
- }
-
- if (seg_start1 != seg_end1) {
-#ifdef DEBUG_MEMLOAD
- printf("loading default 0x%"PRIx64"-0x%"PRIx64
- " (0x%"PRIx64"-0x%"PRIx64")\n",
- seg_start1, seg_end1,
- (uint64_t)atop(seg_start1),
- (uint64_t)atop(seg_end1));
-#endif
- uvm_page_physload(atop(seg_start1),
- atop(seg_end1), atop(seg_start1),
- atop(seg_end1), VM_FREELIST_DEFAULT);
- }
+ x86_load_region(seg_start1, seg_end1);
}
}
return 0;
}
-#endif
+
+#endif /* !XEN */
void
x86_reset(void)
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