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cpu: Add support for microcode version and CPU ID

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Some CPUs use microcode and each core can have a different version of
microcode loaded. Also some CPUs support the concept of an integer ID used
for identification purposes. Add support for these in the CPU uclass.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2016-03-06 19:27:49 -07:00 • committed by Bin Meng
parent e23c6c28b0
commit 740d5d34b1
2 changed files with 12 additions and 0 deletions
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5
include/cpu.h
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@ -15,15 +15,20 @@
* device.
*
* @cpu_id: Platform-specific way of identifying the CPU.
* @ucode_version: Microcode version, if CPU_FEAT_UCODE is set
*/
struct cpu_platdata {
int cpu_id;
int ucode_version;
ulong device_id;
};
/* CPU features - mostly just a placeholder for now */
enum {
CPU_FEAT_L1_CACHE = 0, /* Supports level 1 cache */
CPU_FEAT_MMU = 1, /* Supports virtual memory */
CPU_FEAT_UCODE = 2, /* Requires/uses microcode */
CPU_FEAT_DEVICE_ID = 3, /* Provides a device ID */
CPU_FEAT_COUNT,
};