diff options
| author | Peng Fan <peng.fan@nxp.com> | 2020-05-03 21:58:47 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2020-05-03 15:45:49 +0200 |
| commit | 4c809aee50f5128f815a7f272cdf2d30a1e1e76e (patch) | |
| tree | 41fba222d2362cf5efe94369a81b3828703c3b95 /include/cpu.h | |
| parent | d8e775539e6d69a2bf9d4de721f6ad1560de7823 (diff) | |
uclass: cpu: Add new API to get udevice for current CPU
When running on SoC with multiple clusters, the boot CPU may
not be fixed, saying booting from cluster A or cluster B.
Add a API that can return the udevice for current boot CPU.
Cpu driver needs to implement is_current_cpu interface for this
feature, otherwise the API only returns the first udevice in
cpu uclass.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Diffstat (limited to 'include/cpu.h')
| -rw-r--r-- | include/cpu.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/cpu.h b/include/cpu.h index 6b1b6b37b3..2f283fe244 100644 --- a/include/cpu.h +++ b/include/cpu.h @@ -89,6 +89,15 @@ struct cpu_ops { * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error */ int (*get_vendor)(struct udevice *dev, char *buf, int size); + + /** + * is_current() - Check if the CPU that U-Boot is currently running from + * + * @dev: Device to check (UCLASS_CPU) + * @return 1 if the CPU that U-Boot is currently running from, 0 + * if not. + */ + int (*is_current)(struct udevice *dev); }; #define cpu_get_ops(dev) ((struct cpu_ops *)(dev)->driver->ops) @@ -137,4 +146,18 @@ int cpu_get_vendor(struct udevice *dev, char *buf, int size); */ int cpu_probe_all(void); +/** + * cpu_is_current() - Check if the CPU that U-Boot is currently running from + * + * Return: 1 if yes, - 0 if not + */ +int cpu_is_current(struct udevice *cpu); + +/** + * cpu_get_current_dev() - Get CPU udevice for current CPU + * + * Return: udevice if OK, - NULL on error + */ +struct udevice *cpu_get_current_dev(void); + #endif |