[nrf fromtree] arch: Add Cortex-R8 support

Enable Cortex R8 support, similar to Cortex-R5.

Signed-off-by: Krzysztof Sychla <[email protected]>
Signed-off-by: Marek Slowinski <[email protected]>
Signed-off-by: Piotr Zierhoffer <[email protected]>
Signed-off-by: Mateusz Hołenko <[email protected]>
(cherry picked from commit 5d76b56)
Signed-off-by: Carles Cufi <[email protected]>

Author: ksychla

arch/arm/core/cortex_a_r/Kconfig

@@ -93,6 +93,14 @@ config CPU_CORTEX_R7
 	help
 	  This option signifies the use of a Cortex-R7 CPU
 
+config CPU_CORTEX_R8
+	bool
+	select CPU_AARCH32_CORTEX_R
+	select ARMV7_R
+	select ARMV7_R_FP if CPU_HAS_FPU
+	help
+	  This option signifies the use of a Cortex-R8 CPU
+
 config CPU_CORTEX_R52
 	bool
 	select CPU_AARCH32_CORTEX_R

cmake/gcc-m-cpu.cmake

@@ -68,6 +68,15 @@ if("${ARCH}" STREQUAL "arm")
     else()
       set(GCC_M_CPU ${GCC_M_CPU}+nofp)
     endif()
+  elseif(CONFIG_CPU_CORTEX_R8)
+    set(GCC_M_CPU cortex-r8)
+    if(CONFIG_FPU AND CONFIG_CPU_HAS_VFP)
+      if(NOT CONFIG_VFP_FEATURE_DOUBLE_PRECISION)
+        set(GCC_M_CPU ${GCC_M_CPU}+nofp.dp)
+      endif()
+    else()
+      set(GCC_M_CPU ${GCC_M_CPU}+nofp)
+    endif()
   elseif(CONFIG_CPU_CORTEX_R52)
     set(GCC_M_CPU cortex-r52)
     if(CONFIG_FPU AND CONFIG_CPU_HAS_VFP)

cmake/gcc-m-fpu.cmake

@@ -7,7 +7,7 @@ if(CONFIG_FPU)
 
 if("${ARCH}" STREQUAL "arm")
   if(CONFIG_CPU_AARCH32_CORTEX_R)
-    if(CONFIG_CPU_CORTEX_R4 OR CONFIG_CPU_CORTEX_R5) # VFPv3
+    if(CONFIG_CPU_CORTEX_R4 OR CONFIG_CPU_CORTEX_R5 OR CONFIG_CPU_CORTEX_R8) # VFPv3
       if(CONFIG_VFP_FEATURE_DOUBLE_PRECISION)
         set(GCC_M_FPU vfpv3-d16)
       elseif(CONFIG_VFP_FEATURE_SINGLE_PRECISION)

include/zephyr/arch/arm/cortex_a_r/mpu.h

@@ -32,7 +32,7 @@
 #define MPU_RASR_B_Pos                  0
 #define MPU_RASR_B_Msk                  (1UL << MPU_RASR_B_Pos)
 
-#if defined(CONFIG_CPU_CORTEX_R4) || defined(CONFIG_CPU_CORTEX_R5)
+#if defined(CONFIG_CPU_CORTEX_R4) || defined(CONFIG_CPU_CORTEX_R5) || defined(CONFIG_CPU_CORTEX_R8)
 #define ARM_MPU_REGION_SIZE_32B         ((uint8_t)0x04U)
 #define ARM_MPU_REGION_SIZE_64B         ((uint8_t)0x05U)
 #define ARM_MPU_REGION_SIZE_128B        ((uint8_t)0x06U)

modules/cmsis/cmsis_core_a_r.h

@@ -46,6 +46,8 @@ extern "C" {
 #include <core_cr5.h>
 #elif defined(CONFIG_CPU_CORTEX_R7)
 #include <core_cr7.h>
+#elif defined(CONFIG_CPU_CORTEX_R8)
+#include <core_cr8.h>
 #elif defined(CONFIG_CPU_CORTEX_R52)
 #include <core_cr52.h>
 #elif defined(CONFIG_CPU_AARCH32_CORTEX_A)

subsys/mgmt/mcumgr/grp/os_mgmt/include/os_mgmt_processor.h

@@ -83,6 +83,16 @@ extern "C" {
 #else
 #define PROCESSOR_NAME "cortex-r7+nofp"
 #endif
+#elif defined(CONFIG_CPU_CORTEX_R8)
+#if defined(CONFIG_FPU) && defined(CONFIG_CPU_HAS_VFP)
+#if !defined(CONFIG_VFP_FEATURE_DOUBLE_PRECISION)
+#define PROCESSOR_NAME "cortex-r8+nofp.dp"
+#else
+#define PROCESSOR_NAME "cortex-r8"
+#endif
+#else
+#define PROCESSOR_NAME "cortex-r8+nofp"
+#endif
 #elif defined(CONFIG_CPU_CORTEX_R52)
 #if defined(CONFIG_FPU) && defined(CONFIG_CPU_HAS_VFP)
 #if !defined(CONFIG_VFP_FEATURE_DOUBLE_PRECISION)