diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-04-14 02:10:24 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-04-18 14:29:19 (GMT) |
| commit | 573a3811edc89c2ea3bf4fd077e3673b863b9a0d (patch) | |
| tree | 8704ecc42d27c29d7aaef07c2f3942a67d8df476 /include/linux | |
| parent | c54bcf6805cc6762cb998751b8e005f39ee1dad1 (diff) | |
| download | u-boot-573a3811edc89c2ea3bf4fd077e3673b863b9a0d.tar.xz | |
sysreset: psci: support system reset in a generic way with PSCI
If the system is running PSCI firmware, the System Reset function
(func ID: 0x80000009) is supposed to be handled by PSCI, that is,
the SoC/board specific reset implementation should be moved to PSCI.
U-Boot should call the PSCI service according to the arm-smccc
manner.
The arm-smccc is supported on ARMv7 or later. Especially, ARMv8
generation SoCs are likely to run ARM Trusted Firmware BL31. In
this case, U-Boot is a non-secure world boot loader, so it should
not be able to reset the system directly.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/psci.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/psci.h b/include/linux/psci.h index 310d83e..8d13bd2 100644 --- a/include/linux/psci.h +++ b/include/linux/psci.h @@ -87,4 +87,17 @@ #define PSCI_RET_NOT_PRESENT -7 #define PSCI_RET_DISABLED -8 +#ifdef CONFIG_ARM_PSCI_FW +typedef unsigned long (psci_fn)(unsigned long, unsigned long, + unsigned long, unsigned long); + +extern psci_fn *invoke_psci_fn; +#else +unsigned long invoke_psci_fn(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3) +{ + return PSCI_RET_DISABLED; +} +#endif + #endif /* _UAPI_LINUX_PSCI_H */ |