linux.git/arch/mips/kernel/prom.c, branch v4.19.259

mips: Make sure dt memory regions are valid

2019-06-15T09:54:05+00:00

[ Upstream commit 93fa5b280761a4dbb14c5330f260380385ab2b49 ]

There are situations when memory regions coming from dts may be
too big for the platform physical address space. This especially
concerns XPA-capable systems. Bootloader may determine more than 4GB
memory available and pass it to the kernel over dts memory node, while
kernel is built without XPA/64BIT support. In this case the region
may either simply be truncated by add_memory_region() method
or by u64->phys_addr_t type casting. But in worst case the method
can even drop the memory region if it exceeds PHYS_ADDR_MAX size.
So lets make sure the retrieved from dts memory regions are valid,
and if some of them aren't, just manually truncate them with a warning
printed out.

Signed-off-by: Serge Semin 
Signed-off-by: Paul Burton 
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Mike Rapoport 
Cc: Andrew Morton 
Cc: Michal Hocko 
Cc: Greg Kroah-Hartman 
Cc: Thomas Bogendoerfer 
Cc: Huacai Chen 
Cc: Stefan Agner 
Cc: Stephen Rothwell 
Cc: Alexandre Belloni 
Cc: Juergen Gross 
Cc: Serge Semin 
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin

mips: remove arch specific early_init_dt_alloc_memory_arch

2018-01-30T17:15:55+00:00

Now that the DT core code handles bootmem arches, we can remove the MIPS
specific early_init_dt_alloc_memory_arch function.

Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Signed-off-by: Rob Herring

MIPS: Use early_init_fdt_reserve_self to protect DTB location

2017-01-03T15:34:45+00:00

early_init_fdt_reserve_self is used to tell the boot memory allocator
that a memory is occupied by the DTB, so add it in the MIPS init code to
ensure information about the DTB is added to the boot memory array.

Signed-off-by: Marcin Nowakowski 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14610/
Signed-off-by: Ralf Baechle

MIPS: Fix build with CONFIG_OF=y for non OF-enabled targets

2015-08-03T07:25:00+00:00

Commit 01306aeadd75 ("MIPS: prepare for user enabling of CONFIG_OF")
changed the guards in asm/prom.h from CONFIG_OF to CONFIG_USE_OF, but
missed the actual function declarations in kernel/prom.c, which have
additional dependencies.

Fixes the following build error:

  CC      arch/mips/kernel/prom.o
arch/mips/kernel/prom.c: In function '__dt_setup_arch':
arch/mips/kernel/prom.c:54:2: error: implicit declaration of function 'early_init_dt_scan' [-Werror=implicit-function-declaration]
  if (!early_init_dt_scan(bph))
  ^

Fixes: 01306aeadd75 ("MIPS: prepare for user enabling of CONFIG_OF")
Signed-off-by: Jonas Gorski 
Acked-by: Rob Herring 
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: Grant Likely 
Patchwork: https://patchwork.linux-mips.org/patch/10741/
Signed-off-by: Ralf Baechle

MIPS: prepare for user enabling of CONFIG_OF

2015-06-21T19:54:14+00:00

In preparation to allow users to enable DeviceTree without arch or
machine selecting it, we need to fix build errors on MIPS. When
CONFIG_OF is enabled, device_tree_init cannot be resolved. This is
trivially fixed by using CONFIG_USE_OF instead of CONFIG_OF for prom.h.

Signed-off-by: Rob Herring 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle

MIPS: Let __dt_register_buses accept a single bus type

2015-04-01T15:21:38+00:00

Some machines only have one bus type to register (e.g. "simple-bus").

Signed-off-by: Kevin Cernekee 
Cc: f.fainelli@gmail.com
Cc: jaedon.shin@gmail.com
Cc: abrestic@chromium.org
Cc: tglx@linutronix.de
Cc: jason@lakedaemon.net
Cc: jogo@openwrt.org
Cc: arnd@arndb.de
Cc: computersforpeace@gmail.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8845/
Signed-off-by: Ralf Baechle

MIPS: Create a helper function for DT setup

2014-11-24T06:45:12+00:00

A couple of platforms register two buses and call of_platform_populate().
Move this into a common function to reduce duplication.

Signed-off-by: Kevin Cernekee 
Cc: f.fainelli@gmail.com
Cc: mbizon@freebox.fr
Cc: jogo@openwrt.org
Cc: jfraser@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8167/
Signed-off-by: Ralf Baechle

mips: convert fdt pointers to opaque pointers

2014-04-30T05:59:13+00:00

The architecture code does not need to access the internals of the FDT
blob directly, so make the pointers to it void * and use char arrays
for section variables.

Signed-off-by: Rob Herring 
Cc: Ralf Baechle 
Tested-by: Grant Likely

mips: use common of_flat_dt_get_machine_name

2013-10-10T01:03:57+00:00

Convert mips to use the common of_flat_dt_get_machine_name function.

Signed-off-by: Rob Herring 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Acked-by: John Crispin

of: remove early_init_dt_setup_initrd_arch

2013-10-09T16:39:01+00:00

All arches do essentially the same thing now for
early_init_dt_setup_initrd_arch, so it can now be removed.

Signed-off-by: Rob Herring 
Acked-by: Vineet Gupta 
Cc: Russell King 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: James Hogan 
Cc: Michal Simek 
Cc: Ralf Baechle 
Cc: Jonas Bonn 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: x86@kernel.org
Cc: Chris Zankel 
Cc: Max Filippov 
Acked-by: Grant Likely