[U-Boot] [PATCH 15/69] x86: cpu: Add functions to return the family and stepping

[Simon Glass]

These two identifiers can be useful for drivers which need to adjust their
behaviour depending on the CPU family or stepping (revision).

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 arch/x86/cpu/cpu.c         | 10 ++++++++++
 arch/x86/include/asm/cpu.h | 14 ++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 8800e09..e2aad19 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -333,6 +333,16 @@ static inline void get_fms(struct cpuinfo_x86 *c, uint32_t tfms)
 		c->x86_model += ((tfms >> 16) & 0xF) << 4;
 }
 
+u32 cpu_get_family_model(void)
+{
+	return gd->arch.x86_device & 0x0fff0ff0;
+}
+
+u32 cpu_get_stepping(void)
+{
+	return gd->arch.x86_device & 0xf;
+}
+
 int x86_cpu_init_f(void)
 {
 	const u32 em_rst = ~X86_CR0_EM;
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index 18b0345..987dc65 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -260,4 +260,18 @@ void cpu_call32(ulong code_seg32, ulong target, ulong table);
  */
 int cpu_jump_to_64bit(ulong setup_base, ulong target);
 
+/**
+ * cpu_get_family_model() - Get the family and model for the CPU
+ *
+ * @return the CPU ID masked with 0x0fff0ff0
+ */
+u32 cpu_get_family_model(void);
+
+/**
+ * cpu_get_stepping() - Get the stepping value for the CPU
+ *
+ * @return the CPU ID masked with 0xf
+ */
+u32 cpu_get_stepping(void);
+
 #endif
-- 
2.7.0.rc3.207.g0ac5344