2009/8/5, Sebastian Andrzej Siewior bige...@linutronix.de:
There is no SMP support. The other CPUs are not halted/resumed. At the
time of writing it I did not have a SMP machine so I did not implement
it.
Sebastian
Hi Sebastian,
Recently I've implemented non-SMP kexec on MPC8572 and
In an assemblely code , I invalided all the TLB entries except for
the entry we are executed in.
After that , I setuped a 1:1 TLB entry mapping of 1GB .
At last , I wrote value 30 into the physical address 0x0400, (also
the virtual address because of my 1:1 mapping).
However, it seemed
There was a patch of kexec on SMP mips 64 , and I attempt to implement
kexec on SMP powerpc .
I found that , it was a little different with mips when booting a
kernel. We know that, every CPU jumped directly into kernel on
mips, but on powerpc , E500 SMP, the 'master' CPU was in charge of
2009/8/27 Scott Wood scottw...@freescale.com:
Is this under Linux (it is a Linux mailing list...)? If so, there are
better ways of communicating that don't involve clobbering random memory and
overlapping userspace TLB mappings.
Yes, I'm doing this under linux in kernel mode.
I've used
2009/8/27 Scott Wood scottw...@freescale.com
//check if we successfully store value at 0x400,
lis r22, 0x400
ori r22,r22,0x0
lwz r23,0(r22)
cmpw r23, 30
The values should not be equal, since you wrote a byte and read back a
word.
Furthermore, you are storing the constant 30,
I got some problems when starting a kernel withCONFIG_BLK_DEV_RAM and
using initrd-image (not cpio)(mpc85xx)
RAMDISK: ext2 filesystem found at block 0
RAMDISK: Loading 4096KiB [1 disk] into ram disk... RAMDISK: Loading
4096KiB [1 d
isk] into ram disk... done.
No filesystem could mount root,
ppc 8270, kernel 2.6.21.7
I took the following steps:
In a system call function , say , sys_reboot, interrupt was disabled
by local_irq_disable.
Then , value at the address of 0xc50 was set to a value , say ,
0x1234. Code was like this :
sys_reboot()
{
local_irq_disable();
*(volatile
2009/10/16, Benjamin Herrenschmidt b...@kernel.crashing.org:
On Fri, 2009-10-16 at 09:12 +0800, wilbur.chan wrote:
static inline unsigned long local_irq_disable(void)
{
unsigned long flags, zero;
__asm__ __volatile__(li %1,0; lbz %0,%2(13); stb %1,%2(13)
: =r (flags), =r
ppc 6xx
In platform_init function of sandpoint.c , I delete the code of
getting command line from uboot, and set command_line to a fixed value
, which are like this:
sandpoint.c-- platform_init
#if 0
if (r3 r6) {
/* copy board info
mpc85xx with sata harddisk,which has a rootfs on sda3.
I ' ve tried to use freescale's kernel image , which is togehther
with the mpc85xx board, to successfully mount the sda3 filesystem when
booting,
But when I used my own kernle, it failed:
I am using kernel 2.6.21.7 to mount the
2009/10/22 Kumar Gala ga...@kernel.crashing.org:
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
Post the full kernel boot log.
- k
This is my booting log using ramdisk, I want to
2009/10/22 Kumar Gala ga...@kernel.crashing.org:
Post the full kernel boot log.
- k
And this is the booting log of freescale linux kernel, which
successfully mount the sata disk (sda3) as the rootfs:
Using P2020 DS machine description
Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=256Mb
Sorry, the config I just post is somewhat confusing, here I post my
config again.Thx
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.21.7-EMBSYS-CGEL-3.06.10.P2.F0.B4
# Sun Oct 25 11:24:25 2009
#
# CONFIG_PPC64 is not set
CONFIG_PPC32=y
CONFIG_PPC_MERGE=y
2009/11/13 James Black jblack...@gmail.com
powerpc32 for processors like the freescale 82xx, 83xx machines.
Thanks,
JB
maybe 83xx kexec needs to add some dtb support
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
2010/1/16 Sebastian Andrzej Siewior linuxppc-...@ml.breakpoint.cc:
This is take two :)
SMP support did not work in the first one and due to the lack of a working
SMP machine it is still absent. I took the e500v1 problem into account and
the result is that I now use multiple 256MiB mappings.
A timer has been added into my system, and it is used to generate
continuous interrupt every 1 ms.
This hw is register by request_irq(19, handler_1ms)
Howeve I found that , it is longer than 1 ms between two interrupts,
for I used get_cycles everytime we entered
do_irq :
if(irq==19)
{
Recently I 'm using cpio filesystem (kernel and filesystem compressed
as a whole) on ppc8270 .
However I found that the bigger the size of uImage is , the easier
kernel failed when booting.
Everytime it failed when calling populate_rootfs when booting, so I
guess maybe the size of uImage effect
Most booke powerpc are based on SMP, I am looking forward someone to
implement this. hiahia
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
For example, a macro in serial driver 8250.c , SERIAL_PORT_DFNS ,I
can't find where it is implement.
Is there any solutions to find a macro defination in code ?
Thx
___
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
linux 2.6.21.7
where do serial 8250 port fill its membase and mapbase fileds in
system initializing ?
I found that , when calling do_initcalls--- serial8250_init
platform_driver_register---bus_for_each_dev, system found
an device of serial 8250, which has already fill the membase and
Hi All!
We are planning to port linux 2.6.21.7 to powerpc p4080 using ramdisk
file system, but to find it failed at :
run_init_process(ramdisk_execute_command)
The exact failing place is at run_init_process---
do_execve---search_binary_handler --- load_elf_binary --- if
We are porting linux 2.6.21.7 to a powerpc e500mc board , p4080.
But something is wrong when loading init file:
log:
free init memory...
init has generated signal 4 but has no handler for it
I found it print in _exception ---
if (is_init(current)) {
Hi, David, Segher,
Maybe it was caused by floating exception.I found that,system received
a program check exception,the reason for it was REASON_ILLEGAL.
I also use show_regs to print the NIP in exception,it seemed that
,this exception was caused by 'vmhaddshs' instruction in user mode of
init
2010/7/1 Segher Boessenkool seg...@kernel.crashing.org:
Maybe it was caused by floating exception.I found that,system received
a program check exception,the reason for it was REASON_ILLEGAL.
I also use show_regs to print the NIP in exception,it seemed that
,this exception was caused by
kernel 2.6.21.7
As we know , kexec stores data for new kernel image , in the form
of a page list.
And kexec uses the physical address of the another page for a
next-page pointer.
However, PowerPC e500 does not allow users to turn off the MMU, so we
can not used physical address directly
Excuse me ,
btw,how to search these patches on this maillist?
through Linuxppc-dev Archives one by one?
Cheers,
wilbur
2009/6/29, Kumar Gala ga...@kernel.crashing.org:
On Jun 29, 2009, at 8:47 AM, wilbur.chan wrote:
kernel 2.6.21.7
As we know , kexec stores data for new kernel image
e500 , in head_fsl_booke.S
We know,the first two steps are:
1) invalidate all entries except the entry we are in
2) setup a temp mapping and jump to it respectively:
tlbwe
bl 1f
1: mflr r9
rlwimi r7,r9,0,20,31
addi r7, r7,24
mtspr
I found a patch for kexec on Booke in the archives:
http://lists.ozlabs.org/pipermail/linuxppc-dev/2008-November/064798.html
In this pacth , we use an entry to setup a 1:1 mapping , whose size
is 1GB. However, in e500, the max mapping size for
a single entry is 256M. So I have to setup 4
Hi, Sebastian,
From: Sebastian Andrzej Siewior bigeasy at linutronix.de
The relocate_new_kernel() code usually disables the MMU and the small code
operates on physicall pages while moving the kernel to its final position.
Book-E doesn't support this so a 1:1 mapping must be created.
This patch
As we know, we can't turn off MMU on E500.
I want to setup a 1:1 mapping on SMP E500 v2, and I used 4 Entries of
256M to form a 1G mapping.
Here are my codes, but when I used rfi , it didn't jump to the
required instruction.
0---256M:
lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
30 matches
Mail list logo
