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linux/arch/mips/kernel
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David Daney 43064c0c8e MIPS: Handle initmem in systems with kernel not in add_memory_region() mem 
This patch addresses a couple of related problems:

1) The kernel may reside in physical memory outside of the ranges set
   by plat_mem_setup().  If this is the case, init mem cannot be
   reused as it resides outside of the range of pages that the kernel
   memory allocators control.

2) initrd images might be loaded in physical memory outside of the
   ranges set by plat_mem_setup().  The memory likewise cannot be
   reused.  The patch doesn't handle this specific case, but the
   infrastructure is useful for future patches that do.

The crux of the problem is that there are memory regions that need be
memory_present(), but that cannot be free_bootmem() at the time of
arch_mem_init().  We create a new type of memory (BOOT_MEM_INIT_RAM)
for use with add_memory_region().  Then arch_mem_init() adds the init
mem with this type if the init mem is not already covered by existing
ranges.

When memory is being freed into the bootmem allocator, we skip the
BOOT_MEM_INIT_RAM ranges so they are not clobbered, but we do signal
them as memory_present().  This way when they are later freed, the
necessary memory manager structures have initialized and the Sparse
allocater is prevented from crashing.

The Octeon specific code that handled this case is removed, because
the new general purpose code handles the case.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1988/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 		2011-12-07 22:03:45 +00:00
..
cpufreq MIPS: errloongson2_clock: Fix build error by including linux/module.h 2011-11-10 17:59:45 +00:00
.gitignore
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8250-platform.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
Makefile MIPS: perf: Reorganize contents of perf support files. 2011-10-24 23:34:26 +01:00
asm-offsets.c MIPS: Remove unused task_struct.trap_no field. 2010-08-05 13:26:30 +01:00
binfmt_elfn32.c
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binfmt_elfo32.c
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branch.c MIPS: Sanitize restart logics 2010-10-18 16:59:02 +01:00
cevt-bcm1480.c MIPS: Add missing #inclusions of <linux/irq.h> 2010-10-07 14:08:54 +01:00
cevt-ds1287.c MIPS: Add missing #inclusions of <linux/irq.h> 2010-10-07 14:08:54 +01:00
cevt-gt641xx.c MIPS: Add missing #inclusions of <linux/irq.h> 2010-10-07 14:08:54 +01:00
cevt-r4k.c MIPS: Kernel hangs occasionally during boot. 2011-11-08 17:59:22 +00:00
cevt-sb1250.c MIPS: Add missing #inclusions of <linux/irq.h> 2010-10-07 14:08:54 +01:00
cevt-smtc.c MIPS: Add missing #inclusions of <linux/irq.h> 2010-10-07 14:08:54 +01:00
cevt-txx9.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
cpu-bugs64.c Fix common misspellings 2011-03-31 11:26:23 -03:00
cpu-probe.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
csrc-bcm1480.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
csrc-ioasic.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
csrc-powertv.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
csrc-r4k.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
csrc-sb1250.c mips: convert to clocksource_register_hz/khz 2011-02-21 13:33:50 -08:00
early_printk.c
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entry.S MIPS: Split do_syscall_trace into two functions. 2011-05-19 09:55:44 +01:00
ftrace.c MIPS: Ftrace: Fix the CONFIG_DYNAMIC_FTRACE=n compile 2011-09-21 17:52:04 +02:00
genex.S
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gpio_txx9.c
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head.S MIPS: Avoid potential hazard on Context register 2009-11-02 12:00:07 +01:00
i8253.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
i8259.c MIPS: i8259: Mark cascade interrupt non-threaded 2011-09-21 17:52:28 +02:00
init_task.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
irq-gic.c MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
irq-gt641xx.c MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
irq-msc01.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
irq-rm7000.c MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
irq-rm9000.c MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
irq.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
irq_cpu.c MIPS: Install handlers for software IRQs 2011-07-25 17:26:54 +01:00
irq_txx9.c MIPS: Convert the irq functions to the new names 2011-03-29 14:48:07 +02:00
jump_label.c MIPS: jump label: Add MIPS support. 2011-01-18 19:30:24 +01:00
kgdb.c MIPS: Fix a typo. 2010-10-04 18:33:54 +01:00
kprobes.c MIPS: kprobe: Add support. 2010-08-05 13:26:29 +01:00
kspd.c MIPS: kspd: Adjust confusing if indentation 2010-10-04 18:33:54 +01:00
linux32.c MIPS: Compat: Use 32-bit wrapper for compat_sys_futex. 2011-09-21 17:53:44 +02:00
machine_kexec.c
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mcount.S MIPS: tracing: Fix the indentation of mcount.S 2010-08-05 13:26:06 +01:00
mips-mt-fpaff.c MIPS: MT: Fix build error iFPU affinity code 2010-10-25 08:12:27 -07:00
mips-mt.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
mips_ksyms.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
mips_machine.c MIPS: Add generic support for multiple machines within a single kernel 2011-01-18 19:30:21 +01:00
module.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
octeon_switch.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
perf_event.c MIPS: perf: Reorganize contents of perf support files. 2011-10-24 23:34:26 +01:00
perf_event_mipsxx.c MIPS: perf: Add Octeon support for hardware perf. 2011-10-24 23:34:27 +01:00
proc.c MIPS: Probe for presence of KScratch registers. 2011-01-18 19:30:22 +01:00
process.c mips: add export.h to files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:57 -04:00
prom.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
ptrace.c MIPS: Split do_syscall_trace into two functions. 2011-05-19 09:55:44 +01:00
ptrace32.c
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r4k_fpu.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
r4k_switch.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
r2300_fpu.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
r2300_switch.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
r6000_fpu.S update David Miller's old email address 2011-04-06 06:19:38 -07:00
relocate_kernel.S
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reset.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
rtlx.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
scall32-o32.S MIPS: Hook up process_vm_readv and process_vm_writev system calls. 2011-11-09 00:07:56 +00:00
scall64-64.S MIPS: Hook up process_vm_readv and process_vm_writev system calls. 2011-11-09 00:07:56 +00:00
scall64-n32.S MIPS: Hook up process_vm_readv and process_vm_writev system calls. 2011-11-09 00:07:56 +00:00
scall64-o32.S MIPS: Hook up process_vm_readv and process_vm_writev system calls. 2011-11-09 00:07:56 +00:00
setup.c MIPS: Handle initmem in systems with kernel not in add_memory_region() mem 2011-12-07 22:03:45 +00:00
signal-common.h MIPS: Move signal trampolines off of the stack. 2010-04-12 17:26:15 +01:00
signal.c MIPS: Handle __put_user() sleeping. 2011-09-21 17:52:38 +02:00
signal32.c MIPS: Fix GCC-4.6 'set but not used' warning in signal*.c 2011-03-14 21:07:25 +01:00
signal_n32.c MIPS: do_sigaltstack() expects userland pointers 2010-10-18 16:59:03 +01:00
smp-cmp.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smp-mt.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smp-up.c cpumask: arch_send_call_function_ipi_mask: mips 2009-09-24 09:34:45 +09:30
smp.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smtc-asm.S
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smtc-proc.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smtc.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
spinlock_test.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
spram.c MIPS: SPRAM: Clean up support code a little 2009-11-02 12:00:05 +01:00
stacktrace.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
sync-r4k.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
syscall.c MIPS: Move arch_get_unmapped_area and gang to new file. 2011-05-19 09:55:49 +01:00
time.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
topology.c
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traps.c MIPS: ASID conflict after CPU hotplug 2011-11-10 17:59:45 +00:00
unaligned.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
vdso.c MIPS: Make init_vdso a subsys_initcall. 2010-07-26 19:08:16 +01:00
vmlinux.lds.S Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2011-05-24 11:53:42 -07:00
vpe.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
watch.c
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