[arm] Split out 32-bit-specific code to arch/arm32

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/arm/Makefile

@@ -3,23 +3,10 @@
 ASM_TCHAR	:= %
 ASM_TCHAR_OPS	:= %%
 
-# ARM-specific directories containing source files
-#
-SRCDIRS		+= arch/arm/core
-SRCDIRS		+= arch/arm/libgcc
-SRCDIRS		+= arch/arm/interface/efi
-
-# ARM-specific flags
+# Include common ARM headers
 #
-CFLAGS		+= -mthumb -mcpu=cortex-a15 -mabi=aapcs -mfloat-abi=soft
-CFLAGS		+= -mword-relocations
-ASFLAGS		+= -mthumb -mcpu=cortex-a15
+INCDIRS		+= arch/arm/include
 
-# EFI requires -fshort-wchar, and nothing else currently uses wchar_t
-#
-CFLAGS		+= -fshort-wchar
-
-# Include platform-specific Makefile
+# ARM-specific directories containing source files
 #
-MAKEDEPS	+= arch/arm/Makefile.$(PLATFORM)
-include arch/arm/Makefile.$(PLATFORM)
+SRCDIRS		+= arch/arm/interface/efi

src/arch/arm/Makefile.efi

@@ -1,13 +1,5 @@
 # -*- makefile -*- : Force emacs to use Makefile mode
 
-# Specify EFI image builder
-#
-ELF2EFI		= $(ELF2EFI32)
-
-# Specify EFI boot file
-#
-EFI_BOOT_FILE	= bootarm.efi
-
 # Include generic EFI Makefile
 #
 MAKEDEPS	+= Makefile.efi

src/arch/arm/core/arm_io.c

@@ -33,7 +33,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  */
 
 /** An ARM I/O qword */
-union arm_io_qword {
+union arm32_io_qword {
 	uint64_t qword;
 	uint32_t dword[2];
 };
@@ -44,12 +44,12 @@ union arm_io_qword {
  * @v io_addr		I/O address
  * @ret data		Value read
  *
- * This is not atomic for ARM.
+ * This is not atomic for ARM32.
  */
-static uint64_t arm_readq ( volatile uint64_t *io_addr ) {
-	volatile union arm_io_qword *ptr =
-		container_of ( io_addr, union arm_io_qword, qword );
-	union arm_io_qword tmp;
+static uint64_t arm32_readq ( volatile uint64_t *io_addr ) {
+	volatile union arm32_io_qword *ptr =
+		container_of ( io_addr, union arm32_io_qword, qword );
+	union arm32_io_qword tmp;
 
 	tmp.dword[0] = readl ( &ptr->dword[0] );
 	tmp.dword[1] = readl ( &ptr->dword[1] );
@@ -62,12 +62,12 @@ static uint64_t arm_readq ( volatile uint64_t *io_addr ) {
  * @v data		Value to write
  * @v io_addr		I/O address
  *
- * This is not atomic for ARM.
+ * This is not atomic for ARM32.
  */
-static void arm_writeq ( uint64_t data, volatile uint64_t *io_addr ) {
-	volatile union arm_io_qword *ptr =
-		container_of ( io_addr, union arm_io_qword, qword );
-	union arm_io_qword tmp;
+static void arm32_writeq ( uint64_t data, volatile uint64_t *io_addr ) {
+	volatile union arm32_io_qword *ptr =
+		container_of ( io_addr, union arm32_io_qword, qword );
+	union arm32_io_qword tmp;
 
 	tmp.qword = data;
 	writel ( tmp.dword[0], &ptr->dword[0] );
@@ -84,5 +84,5 @@ PROVIDE_IOAPI_INLINE ( arm, writew );
 PROVIDE_IOAPI_INLINE ( arm, writel );
 PROVIDE_IOAPI_INLINE ( arm, iodelay );
 PROVIDE_IOAPI_INLINE ( arm, mb );
-PROVIDE_IOAPI ( arm, readq, arm_readq );
-PROVIDE_IOAPI ( arm, writeq, arm_writeq );
+PROVIDE_IOAPI ( arm, readq, arm32_readq );
+PROVIDE_IOAPI ( arm, writeq, arm32_writeq );

src/arch/arm32/Makefile

@@ -0,0 +1,23 @@
+# ARM32-specific directories containing source files
+#
+SRCDIRS		+= arch/arm32/core
+SRCDIRS		+= arch/arm32/libgcc
+
+# ARM32-specific flags
+#
+CFLAGS		+= -mthumb -mcpu=cortex-a15 -mabi=aapcs -mfloat-abi=soft
+CFLAGS		+= -mword-relocations
+ASFLAGS		+= -mthumb -mcpu=cortex-a15
+
+# EFI requires -fshort-wchar, and nothing else currently uses wchar_t
+#
+CFLAGS		+= -fshort-wchar
+
+# Include common ARM Makefile
+MAKEDEPS	+= arch/arm/Makefile
+include arch/arm/Makefile
+
+# Include platform-specific Makefile
+#
+MAKEDEPS	+= arch/arm32/Makefile.$(PLATFORM)
+include arch/arm32/Makefile.$(PLATFORM)

src/arch/arm32/Makefile.efi

@@ -0,0 +1,14 @@
+# -*- makefile -*- : Force emacs to use Makefile mode
+
+# Specify EFI image builder
+#
+ELF2EFI		= $(ELF2EFI32)
+
+# Specify EFI boot file
+#
+EFI_BOOT_FILE	= bootarm.efi
+
+# Include generic EFI Makefile
+#
+MAKEDEPS	+= arch/arm/Makefile.efi
+include arch/arm/Makefile.efi