diff options
author | Damien Le Moal <damien.lemoal@wdc.com> | 2020-03-16 09:47:38 +0900 |
---|---|---|
committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-04-03 10:46:43 -0700 |
commit | 335b139057ef79dbede01dea6e8c3f47c2b88802 (patch) | |
tree | a00fb4785ff526dbca683b360e2239cad46c7487 /arch/riscv/kernel/Makefile | |
parent | 956d705dd279f70d5a222375fa97b637d6e8c43d (diff) |
riscv: Add SOC early init support
Add a mechanism for early SoC initialization for platforms that need
additional hardware initialization not possible through the regular
device tree and drivers mechanism. With this, a SoC specific
initialization function can be called very early, before DTB parsing
is done by parse_dtb() in Linux RISC-V kernel setup code.
This can be very useful for early hardware initialization for No-MMU
kernels booted directly in M-mode because it is quite likely that no
other booting stage exist prior to the No-MMU kernel.
Example use of a SoC early initialization is as follows:
static void vendor_abc_early_init(const void *fdt)
{
/*
* some early init code here that can use simple matches
* against the flat device tree file.
*/
}
SOC_EARLY_INIT_DECLARE("vendor,abc", abc_early_init);
This early initialization function is executed only if the flat device
tree for the board has a 'compatible = "vendor,abc"' entry;
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/Makefile')
-rw-r--r-- | arch/riscv/kernel/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile index 1bad93f63dba..86c83081044f 100644 --- a/arch/riscv/kernel/Makefile +++ b/arch/riscv/kernel/Makefile @@ -11,6 +11,7 @@ endif extra-y += head.o extra-y += vmlinux.lds +obj-y += soc.o obj-y += cpu.o obj-y += cpufeature.o obj-y += entry.o |