m68k: add generic-board support

Add generic-board support for the m68k architecture.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>

arch/m68k/config.mk

@@ -11,6 +11,9 @@ endif
 
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x20000
 
+# Support generic board on m68k
+__HAVE_ARCH_GENERIC_BOARD := y
+
 PLATFORM_CPPFLAGS += -D__M68K__
 PLATFORM_LDFLAGS  += -n
 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections

arch/m68k/include/asm/config.h

@@ -7,6 +7,9 @@
 #ifndef _ASM_CONFIG_H_
 #define _ASM_CONFIG_H_
 
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_SYS_GENERIC_GLOBAL_DATA
+
 #define CONFIG_NEEDS_MANUAL_RELOC
 
 #define CONFIG_LMB

arch/m68k/include/asm/u-boot.h

@@ -20,6 +20,11 @@
  * include/asm-ppc/u-boot.h
  */
 
+#ifdef CONFIG_SYS_GENERIC_BOARD
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
+#else
+
 #ifndef __ASSEMBLY__
 
 typedef struct bd_info {
@@ -48,6 +53,9 @@ typedef struct bd_info {
 
 #endif				/* __ASSEMBLY__ */
 
+#endif				/* !CONFIG_SYS_GENERIC_BOARD */
+
+
 /* For image.h:image_check_target_arch() */
 #define IH_ARCH_DEFAULT IH_ARCH_M68K
 

arch/m68k/lib/Makefile

@@ -5,7 +5,9 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y	+= board.o
+ifndef CONFIG_SYS_GENERIC_BOARD
+obj-y   += board.o
+endif
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
 obj-y	+= cache.o
 obj-y	+= interrupts.o

common/board_f.c

@@ -174,7 +174,7 @@ static int announce_dram_init(void)
 	return 0;
 }
 
-#if defined(CONFIG_MIPS) || defined(CONFIG_PPC)
+#if defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_M68K)
 static int init_func_ram(void)
 {
 #ifdef	CONFIG_BOARD_TYPES
@@ -598,7 +598,7 @@ static int display_new_sp(void)
 	return 0;
 }
 
-#ifdef CONFIG_PPC
+#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 static int setup_board_part1(void)
 {
 	bd_t *bd = gd->bd;
@@ -619,7 +619,7 @@ static int setup_board_part1(void)
 		defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
 	bd->bi_immr_base = CONFIG_SYS_IMMR;	/* base  of IMMR register     */
 #endif
-#if defined(CONFIG_MPC5xxx)
+#if defined(CONFIG_MPC5xxx) || defined(CONFIG_M68K)
 	bd->bi_mbar_base = CONFIG_SYS_MBAR;	/* base of internal registers */
 #endif
 #if defined(CONFIG_MPC83xx)
@@ -709,6 +709,13 @@ static int setup_reloc(void)
 {
 #ifdef CONFIG_SYS_TEXT_BASE
 	gd->reloc_off = gd->relocaddr - CONFIG_SYS_TEXT_BASE;
+#ifdef CONFIG_M68K
+	/*
+	 * On all ColdFire arch cpu, monitor code starts always
+	 * just after the default vector table location, so at 0x400
+	 */
+	gd->reloc_off = gd->relocaddr - (CONFIG_SYS_TEXT_BASE + 0x400);
+#endif
 #endif
 	memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));
 
@@ -834,6 +841,9 @@ static init_fnc_t init_sequence_f[] = {
 #ifdef CONFIG_FSL_ESDHC
 	get_clocks,
 #endif
+#ifdef CONFIG_M68K
+	get_clocks,
+#endif
 	env_init,		/* initialize environment */
 #if defined(CONFIG_8xx_CPUCLK_DEFAULT)
 	/* get CPU and bus clocks according to the environment variable */
@@ -860,7 +870,7 @@ static init_fnc_t init_sequence_f[] = {
 #if defined(CONFIG_MPC83xx)
 	prt_83xx_rsr,
 #endif
-#ifdef CONFIG_PPC
+#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 	checkcpu,
 #endif
 	print_cpuinfo,		/* display cpu info (and speed) */
@@ -886,7 +896,7 @@ static init_fnc_t init_sequence_f[] = {
 #if defined(CONFIG_ARM) || defined(CONFIG_X86) || defined(CONFIG_MICROBLAZE) || defined(CONFIG_AVR32)
 	dram_init,		/* configure available RAM banks */
 #endif
-#if defined(CONFIG_MIPS) || defined(CONFIG_PPC)
+#if defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_M68K)
 	init_func_ram,
 #endif
 #ifdef CONFIG_POST
@@ -954,7 +964,7 @@ static init_fnc_t init_sequence_f[] = {
 	reserve_stacks,
 	setup_dram_config,
 	show_dram_config,
-#ifdef CONFIG_PPC
+#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 	setup_board_part1,
 	INIT_FUNC_WATCHDOG_RESET
 	setup_board_part2,

common/board_r.c

@@ -167,14 +167,17 @@ static int initr_serial(void)
 	return 0;
 }
 
-#ifdef CONFIG_PPC
+#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 static int 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
@@ -268,14 +271,6 @@ static int initr_malloc(void)
 	return 0;
 }
 
-#ifdef CONFIG_SYS_NONCACHED_MEMORY
-static int initr_noncached(void)
-{
-	noncached_init();
-	return 0;
-}
-#endif
-
 #ifdef CONFIG_DM
 static int initr_dm(void)
 {
@@ -703,9 +698,6 @@ init_fnc_t init_sequence_r[] = {
 #endif
 	initr_barrier,
 	initr_malloc,
-#ifdef CONFIG_SYS_NONCACHED_MEMORY
-	initr_noncached,
-#endif
 	bootstage_relocate,
 #ifdef CONFIG_DM
 	initr_dm,
@@ -729,7 +721,7 @@ init_fnc_t init_sequence_r[] = {
 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 	initr_manual_reloc_cmdtable,
 #endif
-#ifdef CONFIG_PPC
+#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 	initr_trap,
 #endif
 #ifdef CONFIG_ADDR_MAP
@@ -831,7 +823,8 @@ init_fnc_t init_sequence_r[] = {
 #if defined(CONFIG_ARM) || defined(CONFIG_AVR32)
 	initr_enable_interrupts,
 #endif
-#if defined(CONFIG_X86) || defined(CONFIG_MICROBLAZE) || defined(CONFIG_AVR32)
+#if defined(CONFIG_X86) || defined(CONFIG_MICROBLAZE) || defined(CONFIG_AVR32) \
+	|| defined(CONFIG_M68K)
 	timer_init,		/* initialize timer */
 #endif
 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)

include/asm-generic/u-boot.h

@@ -45,7 +45,7 @@ typedef struct bd_info {
 	|| defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
 	unsigned long	bi_immr_base;	/* base of IMMR register */
 #endif
-#if defined(CONFIG_MPC5xxx)
+#if defined(CONFIG_MPC5xxx) || defined(CONFIG_M68K)
 	unsigned long	bi_mbar_base;	/* base of internal registers */
 #endif
 #if defined(CONFIG_MPC83xx)