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| author |   Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2021-01-27 14:24:30 +0100 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2021-02-04 13:34:51 +0100 |
| commit | b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20 (patch) | |
| tree | 8ddc0b7e76974718408e826aa83e7b7084193bb9 /arch/mips/include/asm/bootinfo.h | |
| parent | arch: mips: kernel: Fix two spelling in smp.c (diff) | |
| download | linux-dev-b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20.tar.xz linux-dev-b83ba0b9df56f8404ccc6ebcc7050fb8294f0f20.zip | |
MIPS: of: Introduce helper function to get DTB
Selection of the DTB to be used was burried in more or less readable
code in head.S. Move this code into a inline helper function and
use it.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'arch/mips/include/asm/bootinfo.h')
| -rw-r--r-- | arch/mips/include/asm/bootinfo.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h index aa03b1237155..5be10ece3ef0 100644 --- a/arch/mips/include/asm/bootinfo.h +++ b/arch/mips/include/asm/bootinfo.h @@ -112,7 +112,27 @@ extern char arcs_cmdline[COMMAND_LINE_SIZE]; extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; #ifdef CONFIG_USE_OF -extern unsigned long fw_passed_dtb; +#include <linux/libfdt.h> +#include <linux/of_fdt.h> + +extern char __appended_dtb[]; + +static inline void *get_fdt(void) +{ + if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) || + IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB)) + if (fdt_magic(&__appended_dtb) == FDT_MAGIC) + return &__appended_dtb; + + if (fw_arg0 == -2) /* UHI interface */ + return (void *)fw_arg1; + + if (IS_ENABLED(CONFIG_BUILTIN_DTB)) + if (&__dtb_start != &__dtb_end) + return &__dtb_start; + + return NULL; +} #endif /* |