common: board_r: Drop arch-specific ifdefs around initr_trap

In order to remove the arch-specific ifdefs around initr_trap, introduce
arch_initr_trap weak initcall. Implementations for ppc/m68k/mips have
been moved to arch/<arch>/lib/traps.c

Default implementation is a nop stub.

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/m68k/lib/traps.c

@@ -40,7 +40,7 @@ void exc_handler(struct pt_regs *fp) {
 	for(;;);
 }
 
-void trap_init(ulong value) {
+static void trap_init(ulong value) {
 	unsigned long *vec = (ulong *)value;
 	int i;
 
@@ -59,3 +59,10 @@ void trap_init(ulong value) {
 
 	setvbr(value);		/* set vector base register to new table */
 }
+
+int arch_initr_trap(void)
+{
+	trap_init(CONFIG_SYS_SDRAM_BASE);
+
+	return 0;
+}

arch/mips/lib/traps.c

@@ -99,7 +99,7 @@ static void set_handler(unsigned long offset, void *addr, unsigned long size)
 	flush_cache(ebase + offset, size);
 }
 
-void trap_init(ulong reloc_addr)
+static void trap_init(ulong reloc_addr)
 {
 	unsigned long ebase = gd->irq_sp;
 
@@ -131,3 +131,10 @@ void trap_restore(void)
 	clear_c0_status(ST0_BEV);
 	execution_hazard_barrier();
 }
+
+int arch_initr_trap(void)
+{
+	trap_init(CONFIG_SYS_SDRAM_BASE);
+
+	return 0;
+}

arch/powerpc/lib/Makefile

@@ -40,6 +40,7 @@ obj-y	+= interrupts.o
 obj-$(CONFIG_CMD_KGDB) += kgdb.o
 obj-y	+= stack.o
 obj-y	+= time.o
+obj-y	+= traps.o
 endif # not minimal
 
 ifdef CONFIG_SPL_BUILD

arch/powerpc/lib/traps.c

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ */
+
+#include <common.h>
+#include <init.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void trap_init(unsigned long reloc_addr);
+
+int arch_initr_trap(void)
+{
+	trap_init(gd->relocaddr);
+
+	return 0;
+}

common/board_r.c

@@ -182,20 +182,10 @@ static int initr_reloc_global_data(void)
 	return 0;
 }
 
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_MIPS)
-static int initr_trap(void)
+__weak int arch_initr_trap(void)
 {
-	/*
-	 * Setup trap handlers
-	 */
-#if defined(CONFIG_PPC)
-	trap_init(gd->relocaddr);
-#else
-	trap_init(CONFIG_SYS_SDRAM_BASE);
-#endif
 	return 0;
 }
-#endif
 
 #ifdef CONFIG_ADDR_MAP
 static int initr_addr_map(void)
@@ -669,9 +659,7 @@ static init_fnc_t init_sequence_r[] = {
 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 	initr_manual_reloc_cmdtable,
 #endif
-#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_MIPS)
-	initr_trap,
-#endif
+	arch_initr_trap,
 #ifdef CONFIG_ADDR_MAP
 	initr_addr_map,
 #endif

include/init.h

@@ -300,7 +300,15 @@ int board_early_init_r(void);
 /* TODO(sjg@chromium.org): Drop this when DM_PCI migration is completed */
 void pci_init_board(void);
 
-void trap_init(unsigned long reloc_addr);
+/**
+ * arch_initr_trap() - Init traps
+ *
+ * Arch specific routine for initializing traps. It is called during the
+ * generic board init sequence, after relocation.
+ *
+ * Return: 0 if OK
+ */
+int arch_initr_trap(void);
 
 /**
  * main_loop() - Enter the main loop of U-Boot