arch: add up_read_cpuid api

Signed-off-by: wangmingrong1 <[email protected]>

Author: W-M-R

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"

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);
+}

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;
+}

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);
+}

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);
+}