diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2011-04-28 14:27:21 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-23 09:30:20 -0600 |
| commit | 93c02ab40ae6e06cb24d14845d9f008fdd24f43d (patch) | |
| tree | a8caf072ce7409eceb8178e952b7536bbd289460 /arch/arm/include/asm/setup.h | |
| parent | 6291319d4864848efc7b5d81389e2404fb478cb9 (diff) | |
arm/dt: probe for platforms via the device tree
If a dtb is passed to the kernel then the kernel needs to iterate
through compiled-in mdescs looking for one that matches and move the
dtb data to a safe location before it gets accidentally overwritten by
the kernel.
This patch creates a new function, setup_machine_fdt() which is
analogous to the setup_machine_atags() created in the previous patch.
It does all the early setup needed to use a device tree machine
description.
v5: - Print warning with neither dtb nor atags are passed to the kernel
- Fix bug in setting of __machine_arch_type to the selected machine,
not just the last machine in the list.
Reported-by: Tixy <tixy@yxit.co.uk>
- Copy command line directly into boot_command_line instead of cmd_line
v4: - Dump some output when a matching machine_desc cannot be found
v3: - Added processing of reserved list.
- Backed out the v2 change that copied instead of reserved the
dtb. dtb is reserved again and the real problem was fixed by
using alloc_bootmem_align() for early allocation of RAM for
unflattening the tree.
- Moved cmd_line and initrd changes to earlier patch to make series
bisectable.
v2: Changed to save the dtb by copying into an allocated buffer.
- Since the dtb will very likely be passed in the first 16k of ram
where the interrupt vectors live, memblock_reserve() is
insufficient to protect the dtb data.
[based on work originally written by Jeremy Kerr <jeremy.kerr@canonical.com>]
Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/arm/include/asm/setup.h')
| -rw-r--r-- | arch/arm/include/asm/setup.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 93b4702ffa0f..ee2ad8ae07af 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -218,6 +218,8 @@ extern struct meminfo meminfo; #define bank_phys_size(bank) (bank)->size extern int arm_add_memory(phys_addr_t start, unsigned long size); +extern void early_print(const char *str, ...); +extern void dump_machine_table(void); #endif /* __KERNEL__ */ |