diff options
| author | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-04-14 13:43:24 +0900 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-05-18 11:38:05 -0700 |
| commit | 2d2682512f0faf4d09a696184bf3c0bb6838baca (patch) | |
| tree | 31d238d63d671ff6b8ade87e521186d30afec7e7 /arch/riscv/kernel/setup.c | |
| parent | b9bbe6ed63b2b9f2c9ee5cbd0f2c946a2723f4ce (diff) | |
riscv: Allow device trees to be built into the kernel
Some systems don't provide a useful device tree to the kernel on boot.
Chasing around bootloaders for these systems is a headache, so instead
le't's just keep a device tree table in the kernel, keyed by the SOC's
unique identifier, that contains the relevant DTB.
This is only implemented for M mode right now. While we could implement
this via the SBI calls that allow access to these identifiers, we don't
have any systems that need this right now.
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/setup.c')
| -rw-r--r-- | arch/riscv/kernel/setup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 145128a7e560..3e528312f615 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -75,7 +75,11 @@ void __init setup_arch(char **cmdline_p) setup_bootmem(); paging_init(); +#if IS_ENABLED(CONFIG_BUILTIN_DTB) + unflatten_and_copy_device_tree(); +#else unflatten_device_tree(); +#endif clint_init_boot_cpu(); #ifdef CONFIG_SWIOTLB |