arch: arm: Add Cortex-A7 support

Pass the correct -mfpu and -mcpu flags to the compiler when building
for the Cortex-A7.

Signed-off-by: Julien Racki <julien.racki@st.com>

arch/arm/core/cortex_a_r/Kconfig

@@ -13,6 +13,15 @@
 # CPU_AARCH32_CORTEX_A / if CPU_AARCH32_CORTEX_R blocks so they are not
 # exposed if one selects a different ARM Cortex Family (Cortex-M).
 
+config CPU_CORTEX_A7
+	bool
+	select CPU_AARCH32_CORTEX_A
+	select ARMV7_A
+	select CPU_HAS_ICACHE
+	select CPU_HAS_DCACHE
+	help
+	  This option signifies the use of a Cortex-A7 CPU.
+
 config CPU_CORTEX_A9
 	bool
 	select CPU_AARCH32_CORTEX_A

cmake/compiler/iar/iccarm-cpu.cmake

@@ -67,6 +67,8 @@ if("${ARCH}" STREQUAL "arm")
         set(ICCARM_CPU ${ICCARM_CPU}+fp.sp)
       endif()
     endif()
+  elseif(CONFIG_CPU_CORTEX_A7)
+    set(ICCARM_CPU Cortex-A7)
   elseif(CONFIG_CPU_CORTEX_A9)
     set(ICCARM_CPU Cortex-A9)
   else()

cmake/gcc-m-cpu.cmake

@@ -84,6 +84,8 @@ if("${ARCH}" STREQUAL "arm")
         set(GCC_M_CPU ${GCC_M_CPU}+nofp.dp)
       endif()
     endif()
+  elseif(CONFIG_CPU_CORTEX_A7)
+    set(GCC_M_CPU cortex-a7)
   elseif(CONFIG_CPU_CORTEX_A9)
     set(GCC_M_CPU cortex-a9)
   else()

cmake/gcc-m-fpu.cmake

@@ -45,6 +45,10 @@ if("${ARCH}" STREQUAL "arm")
     set(FPU_FOR_cortex-m85+nodsp    auto)
 
     set(GCC_M_FPU ${FPU_FOR_${GCC_M_CPU}})
+  elseif(CONFIG_CPU_AARCH32_CORTEX_A)
+    if(CONFIG_CPU_CORTEX_A7)
+      set(GCC_M_FPU vfpv4-d16)
+    endif()
   endif()
 endif()
 

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

@@ -103,6 +103,8 @@ extern "C" {
 #else
 #define PROCESSOR_NAME "cortex-r52"
 #endif
+#elif defined(CONFIG_CPU_CORTEX_A7)
+#define PROCESSOR_NAME "cortex-a7"
 #elif defined(CONFIG_CPU_CORTEX_A9)
 #define PROCESSOR_NAME "cortex-a9"
 #endif