lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

powerpc: Change the default link address for pSeries zImage kernels

Browse Source 
Currently we set the start of the .text section to be 4Mb for pSeries.
In situations where the zImage is > 8Mb we'll fail to boot (due to
overlapping with OF).  Move .text in a zImage from 4MB to 64MB
(well past OF).

We still will not be able to load large zImage unless we also move OF,
to that end, add a note to the zImage ELF to move OF to 32Mb.  If this
is the very first kernel booted then we'll need to move OF manually by
setting real-base.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Tony Breeds
2008-06-24 14:20:29 +10:00
committed by Paul Mackerras
parent c230328def
commit 9b09c6d909
5 changed files with 25 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/powerpc/boot/oflib.c
View File

@@ -168,8 +168,19 @@ void *of_claim(unsigned long virt, unsigned long size, unsigned long align)
void *of_vmlinux_alloc(unsigned long size)
{
void *p = malloc(size);
unsigned long start = (unsigned long)_start, end = (unsigned long)_end;
void *addr;
void *p;
/* With some older POWER4 firmware we need to claim the area the kernel
* will reside in. Newer firmwares don't need this so we just ignore
* the return value.
*/
addr = of_claim(start, end - start, 0);
printf("Trying to claim from 0x%lx to 0x%lx (0x%lx) got %p\r\n",
start, end, end - start, addr);
p = malloc(size);
if (!p)
fatal("Can't allocate memory for kernel image!\n\r");