On Fri, Feb 18, 2011 at 03:13:06PM +0100, Drasko DRASKOVIC wrote:
> So my questions are following :
> 1) Why commandlines are ignoread and ATAGS are given priority
> 2) What is the most elegant way to protect one region in RAM :
> a) By giving less memory with ATAGS_MEM and thus making protected
> region invisible to Linux, lying to it that RAM is smaller
> b) By changing somehow linker script
> c) By changing some configuration variables (which ?)
Use the source!
arch/arm/kernel/setup.c:
/*
* Pick out the memory size. We look for mem=size@start,
* where start and size are "size[KkMm]"
*/
static int __init early_mem(char *p)
{
static int usermem __initdata = 0;
unsigned long size, start;
char *endp;
/*
* If the user specifies memory size, we
* blow away any automatically generated
* size.
*/
if (usermem == 0) {
usermem = 1;
meminfo.nr_banks = 0;
}
start = PHYS_OFFSET;
size = memparse(p, &endp);
if (*endp == '@')
start = memparse(endp + 1, NULL);
arm_add_memory(start, size);
return 0;
}
early_param("mem", early_mem);
So
1) they are not
2) d) By giving less memory with mem=size@start and thus making protected
region invisible to Linux, lying to it that RAM is smaller
Daniel
_______________________________________________
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
