arch: add up_read_cpuid api

Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com>
apache · Jan 20, 2025 · 0403699 · 0403699
1 parent 118f827
commit 0403699
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Showing 5 changed files with 24 additions and 0 deletions.
diff --git a/arch/arm/include/arch.h b/arch/arm/include/arch.h
@@ -164,6 +164,8 @@ typedef struct arch_addrenv_s arch_addrenv_t;
  * Public Function Prototypes
  ****************************************************************************/
 
+uintptr_t up_read_cpuid(void);
+
 #ifdef __cplusplus
 #define EXTERN extern "C"
 extern "C"

diff --git a/arch/arm/src/armv6-m/arm_cpuinfo.c b/arch/arm/src/armv6-m/arm_cpuinfo.c
@@ -89,3 +89,8 @@ ssize_t up_show_cpuinfo(char *buf, size_t buf_size, off_t file_off)
   return -file_off;
 }
 #endif /* CONFIG_FS_PROCFS && !CONFIG_FS_PROCFS_EXCLUDE_CPUINFO */
+
+uintptr_t up_read_cpuid(void)
+{
+  return *((volatile uint32_t *)ARMV6M_SYSCON2_BASE);
+}
diff --git a/arch/arm/src/armv7-a/arm_cpuinfo.c b/arch/arm/src/armv7-a/arm_cpuinfo.c
@@ -168,3 +168,10 @@ ssize_t up_show_cpuinfo(char *buf, size_t buf_size, off_t file_off)
   return -file_off;
 }
 #endif /* CONFIG_FS_PROCFS && !CONFIG_FS_PROCFS_EXCLUDE_CPUINFO */
+
+uintptr_t up_read_cpuid(void)
+{
+  uint32_t cpuid;
+  asm volatile("MRC p15, 0, %0, c0, c0, 0" : "=r"(cpuid));
+  return cpuid;
+}
diff --git a/arch/arm/src/armv7-m/arm_cpuinfo.c b/arch/arm/src/armv7-m/arm_cpuinfo.c
@@ -158,3 +158,8 @@ ssize_t up_show_cpuinfo(char *buf, size_t buf_size, off_t file_off)
   return -file_off;
 }
 #endif /* CONFIG_FS_PROCFS && !CONFIG_FS_PROCFS_EXCLUDE_CPUINFO */
+
+uintptr_t up_read_cpuid(void)
+{
+  return *((volatile uint32_t *)NVIC_CPUID_BASE);
+}
diff --git a/arch/arm/src/armv8-m/arm_cpuinfo.c b/arch/arm/src/armv8-m/arm_cpuinfo.c
@@ -144,3 +144,8 @@ ssize_t up_show_cpuinfo(char *buf, size_t buf_size, off_t file_off)
   return -file_off;
 }
 #endif /* CONFIG_FS_PROCFS && !CONFIG_FS_PROCFS_EXCLUDE_CPUINFO */
+
+uintptr_t up_read_cpuid(void)
+{
+  return *((volatile uint32_t *)NVIC_CPUID_BASE);
+}