Hi!
HPA told me bootloaders need to parse mem=, so we should invent other
option for stuff like mem=exactmap. Please apply,
Pavel
--- clean/arch/i386/kernel/setup.c 2003-03-06 23:25:14.000000000 +0100
+++ linux/arch/i386/kernel/setup.c 2003-03-08 00:18:21.000000000 +0100
@@ -527,6 +527,9 @@
* to <mem>, overriding the bios size.
* "mem=XXX[KkmM]@XXX[KkmM]" defines a memory region from
* <start> to <start>+<mem>, overriding the bios size.
+ *
+ * HPA tells me bootloaders need to parse mem=, so no new
+ * option should be mem=
*/
if (c == ' ' && !memcmp(from, "mem=", 4)) {
if (to != command_line)
@@ -535,8 +538,24 @@
from += 9+4;
clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
disable_pse = 1;
- } else if (!memcmp(from+4, "exactmap", 8)) {
- from += 8+4;
+ } else {
+ /* If the user specifies memory size, we
+ * limit the BIOS-provided memory map to
+ * that size. exactmap can be used to specify
+ * the exact map. mem=number can be used to
+ * trim the existing memory map.
+ */
+ unsigned long long start_at, mem_size;
+
+ mem_size = memparse(from+4, &from);
+ }
+ }
+
+ if (c == ' ' && !memcmp(from, "memmap=", 7)) {
+ if (to != command_line)
+ to--;
+ if (!memcmp(from+7, "exactmap", 8)) {
+ from += 8+7;
e820.nr_map = 0;
userdef = 1;
} else {
@@ -548,7 +567,7 @@
*/
unsigned long long start_at, mem_size;
- mem_size = memparse(from+4, &from);
+ mem_size = memparse(from+7, &from);
if (*from == '@') {
start_at = memparse(from+1, &from);
add_memory_region(start_at, mem_size, E820_RAM);
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This archive was generated by hypermail 2b29 : Sat Mar 15 2003 - 22:00:21 EST