linux/arch/arm/kernel
Mike Westerhof 033b8ffe3f [ARM] 4599/1: Preserve ATAG list for use with kexec (2.6.23)
This patch resolves a kexec boot failure that can occur because
no ATAGs are passed in to the kexec'd kernel. Currently the
newly-kexec'd kernel may fail if it requires specific ATAGs, or
it may fail because the fixed memory location at which it expects
to find the ATAGs may contain random data instead of ATAGs.

The patch ensures that any ATAGs passed to the current kernel
at boot time are copied to a static buffer, and are copied back
when kexec copies the new kernel into place. Thus the new
kernel sees the same ATAGs from kexec and the boot loader.

The boot parameters are copied without regard to type, content,
or length -- this patch's scope is limited soley to saving and
restoring a fixed-size block of memory containing the kernel's
boot parameters. Additional functionality to examine, alter, or
replace the ATAGs (using kexec, for example) can be implemented
by manipulating the static buffer containing the preserved ATAGs.

Note: the size of the buffer (1.5KB) is selected to comfortably
hold one of each ATAG type, including a maximum-length command
line and the maximum number of ATAG_MEM structures currently
supported by the kernel. Should an ATAG list exceed that limit,
the list will be silently truncated to that limit (to do other-
wise at that point in the boot process would make a simple
problem exceedingly complicated).

[Note: this is the same patch as 4579, modified to accomodate
the ATAG changes introduced in 2.6.23]

Signed-off-by: Mike Westerhof <mwester at dls.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-10-12 23:43:48 +01:00
..
armksyms.c [ARM] use __used attribute 2007-05-30 13:15:06 +01:00
arthur.c [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
asm-offsets.c [ARM] ARMv6: add CPU_HAS_ASID configuration 2007-05-17 10:19:23 +01:00
bios32.c [ARM] Resolve PCI section warnings 2007-09-30 17:36:22 +01:00
calls.S [ARM] Add fallocate syscall entry 2007-10-12 23:43:31 +01:00
compat.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
compat.h [ARM] 3365/1: [cleanup] header for compat.c exported functions 2006-03-15 23:17:30 +00:00
crunch-bits.S [ARM] 3370/2: ep93xx: add crunch support 2006-06-28 17:55:01 +01:00
crunch.c [ARM] 4121/1: ep93xx: move setting of HWCAP_CRUNCH 2007-02-08 14:48:13 +00:00
debug.S [ARM] 3838/1: ARM: DCC debug console support for ARM11 2006-09-25 10:36:09 +01:00
dma-isa.c [ARM] arch/arm/kernel/dma-isa.c: named initializers 2006-05-16 22:09:46 +01:00
dma.c [ARM] Export dma_channel_active() 2007-03-31 21:36:53 +01:00
ecard.c [ARM] ecard: add ecardm_iomap() / ecardm_iounmap() 2007-05-11 17:19:02 +01:00
ecard.h [ARM] ecard: Move private ecard junk out of asm/ecard.h 2007-05-03 14:16:56 +01:00
entry-armv.S [ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user 2007-02-17 15:04:29 +00:00
entry-common.S remove unused TIF_NOTIFY_RESUME flag 2007-07-31 15:39:38 -07:00
entry-header.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
fiq.c [ARM] 3692/1: ARM: coswitch irq handling to the generic implementation 2006-07-01 22:30:09 +01:00
head-common.S [ARM] 4423/1: add ATAGS support 2007-07-12 11:13:33 +01:00
head-nommu.S [ARM] Ensure head text is always placed at the start of kernel 2007-05-08 15:15:45 +01:00
head.S [ARM] 4423/1: add ATAGS support 2007-07-12 11:13:33 +01:00
init_task.c [ARM] Shut up warning about init_thread_union 2007-05-08 12:39:37 +01:00
io.c [ARM] Fix compiler warnings for memcpy_toio/memcpy_fromio/memset_io 2005-09-24 10:42:06 +01:00
irq.c [ARM] Remove needless linux/ptrace.h includes 2007-04-21 20:34:47 +01:00
isa.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
iwmmxt.S [ARM] 3707/1: iwmmxt: use the generic thread notifier infrastructure 2006-07-01 19:56:48 +01:00
machine_kexec.c [ARM] 4137/1: Add kexec support 2007-02-16 14:37:06 +00:00
Makefile [ARM] Add stacktrace support and make oprofile use it 2007-04-28 09:59:37 +01:00
module.c [ARM] Fix ARM branch relocation range 2007-05-08 22:05:25 +01:00
process.c [ARM] 4453/1: Fully Decode ARM instruction set state in show_regs() tombstone 2007-07-12 11:13:35 +01:00
ptrace.c PTRACE_POKEDATA consolidation 2007-07-17 10:23:03 -07:00
ptrace.h [ARM] ptrace: clean up single stepping support 2007-04-21 20:34:58 +01:00
relocate_kernel.S [ARM] 4599/1: Preserve ATAG list for use with kexec (2.6.23) 2007-10-12 23:43:48 +01:00
semaphore.c [ARM] 3103/1: ARM EABI: stack pointer must be 64-bit aligned (part 2) 2006-01-14 16:18:09 +00:00
setup.c [ARM] 4599/1: Preserve ATAG list for use with kexec (2.6.23) 2007-10-12 23:43:48 +01:00
signal.c [ARM] ptrace: clean up single stepping support 2007-04-21 20:34:58 +01:00
signal.h [ARM] nommu: fixups for the exception vectors 2006-03-27 15:18:50 +01:00
smp.c Remove fs.h from mm.h 2007-07-29 17:09:29 -07:00
stacktrace.c [ARM] Fix stacktrace FP range checking 2007-05-30 13:15:12 +01:00
stacktrace.h [ARM] Add stacktrace support and make oprofile use it 2007-04-28 09:59:37 +01:00
sys_arm.c Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM 2007-06-28 11:38:30 -07:00
sys_oabi-compat.c [ARM] 3338/1: old ABI compat: sys_socketcall 2006-02-16 22:36:13 +00:00
time.c [ARM] Spinlock initializer cleanup 2007-05-11 17:38:04 +01:00
traps.c [ARM] Remove CONFIG_IGNORE_FIQ 2007-07-26 14:54:47 +01:00
vmlinux.lds.S define new percpu interface for shared data 2007-07-19 10:04:44 -07:00
xscale-cp0.c [ARM] 3881/4: xscale: clean up cp0/cp1 handling 2006-12-03 17:52:22 +00:00