arm: spear: Move to common SPL infrastructure

The SPL implementation for SPEAr600 is older than the common SPL
infrastructure. This patch now moves the SPEAr600 SPL over to the
common SPL code.

Tested on the only SPEAr board that currently uses SPL in mainline
U-Boot, the x600.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vipin Kumar <vk.vipin@gmail.com>

arch/arm/cpu/arm926ejs/spear/Makefile

@@ -10,7 +10,7 @@ obj-y	:= cpu.o \
 	   timer.o
 
 ifdef CONFIG_SPL_BUILD
-obj-y	+= spl.o spl_boot.o
+obj-y	+= spl.o
 obj-$(CONFIG_SPEAR600) += spear600.o
 obj-$(CONFIG_DDR_MT47H64M16) += spr600_mt47h64m16_3_333_cl5_psync.o
 obj-$(CONFIG_DDR_MT47H32M16) += spr600_mt47h32m16_333_cl5_psync.o

arch/arm/cpu/arm926ejs/spear/spear600.c

@@ -12,6 +12,21 @@
 #include <asm/arch/spr_misc.h>
 #include <asm/arch/spr_defs.h>
 
+void spear_late_init(void)
+{
+	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
+
+	writel(0x80000007, &misc_p->arb_icm_ml1);
+	writel(0x80000007, &misc_p->arb_icm_ml2);
+	writel(0x80000007, &misc_p->arb_icm_ml3);
+	writel(0x80000007, &misc_p->arb_icm_ml4);
+	writel(0x80000007, &misc_p->arb_icm_ml5);
+	writel(0x80000007, &misc_p->arb_icm_ml6);
+	writel(0x80000007, &misc_p->arb_icm_ml7);
+	writel(0x80000007, &misc_p->arb_icm_ml8);
+	writel(0x80000007, &misc_p->arb_icm_ml9);
+}
+
 static void sel_1v8(void)
 {
 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
@@ -103,14 +118,6 @@ void plat_ddr_init(void)
 	}
 }
 
-/*
- * soc_init:
- */
-void soc_init(void)
-{
-	/* Nothing to be done for SPEAr600 */
-}
-
 /*
  * xxx_boot_selected:
  *

arch/arm/cpu/arm926ejs/spear/spl.c

@@ -8,12 +8,14 @@
  */
 
 #include <common.h>
+#include <spl.h>
 #include <version.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/spr_defs.h>
 #include <asm/arch/spr_misc.h>
 #include <asm/arch/spr_syscntl.h>
+#include <linux/mtd/st_smi.h>
 
 static void ddr_clock_init(void)
 {
@@ -205,55 +207,51 @@ int get_socrev(void)
 #endif
 }
 
-void lowlevel_init(void)
+/*
+ * SNOR (Serial NOR flash) related functions
+ */
+static void snor_init(void)
+{
+	struct smi_regs *const smicntl =
+		(struct smi_regs * const)CONFIG_SYS_SMI_BASE;
+
+	/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
+	writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
+	       &smicntl->smi_cr1);
+}
+
+u32 spl_boot_device(void)
+{
+	u32 mode;
+
+	/* Currently only SNOR is supported as the only */
+	if (snor_boot_selected()) {
+		/* SNOR-SMI initialization */
+		snor_init();
+
+		mode = BOOT_DEVICE_NOR;
+	}
+
+	return mode;
+}
+
+void board_init_f(ulong dummy)
 {
 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
-	const char *u_boot_rev = U_BOOT_VERSION;
 
 	/* Initialize PLLs */
 	sys_init();
 
-	/* Initialize UART */
-	serial_init();
-
-	/* Print U-Boot SPL version string */
-	serial_puts("\nU-Boot SPL ");
-	/* Avoid a second "U-Boot" coming from this string */
-	u_boot_rev = &u_boot_rev[7];
-	serial_puts(u_boot_rev);
-	serial_puts(" (");
-	serial_puts(U_BOOT_DATE);
-	serial_puts(" - ");
-	serial_puts(U_BOOT_TIME);
-	serial_puts(")\n");
-
-#if defined(CONFIG_OS_BOOT)
-	writel(readl(&misc_p->periph1_clken) | PERIPH_UART1,
-			&misc_p->periph1_clken);
-#endif
+	preloader_console_init();
+	arch_cpu_init();
 
 	/* Enable IPs (release reset) */
 	writel(PERIPH_RST_ALL, &misc_p->periph1_rst);
 
 	/* Initialize MPMC */
-	serial_puts("Configure DDR\n");
+	puts("Configure DDR\n");
 	mpmc_init();
+	spear_late_init();
 
-	/* SoC specific initialization */
-	soc_init();
-}
-
-void spear_late_init(void)
-{
-	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
-
-	writel(0x80000007, &misc_p->arb_icm_ml1);
-	writel(0x80000007, &misc_p->arb_icm_ml2);
-	writel(0x80000007, &misc_p->arb_icm_ml3);
-	writel(0x80000007, &misc_p->arb_icm_ml4);
-	writel(0x80000007, &misc_p->arb_icm_ml5);
-	writel(0x80000007, &misc_p->arb_icm_ml6);
-	writel(0x80000007, &misc_p->arb_icm_ml7);
-	writel(0x80000007, &misc_p->arb_icm_ml8);
-	writel(0x80000007, &misc_p->arb_icm_ml9);
+	board_init_r(NULL, 0);
 }

arch/arm/cpu/arm926ejs/spear/spl_boot.c

@@ -1,181 +0,0 @@
-/*
- * (C) Copyright 2000-2009
- * Vipin Kumar, ST Microelectronics, vipin.kumar@st.com
- *
- * Copyright (C) 2012 Stefan Roese <sr@denx.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <image.h>
-#include <linux/compiler.h>
-#include <asm/io.h>
-#include <asm/arch/spr_defs.h>
-#include <linux/mtd/st_smi.h>
-
-static const char kernel_name[] = "Linux";
-static const char loader_name[] = "U-Boot";
-
-int image_check_header(image_header_t *hdr, const char *name)
-{
-	if (image_check_magic(hdr) &&
-	    (!strncmp(image_get_name(hdr), name, strlen(name))) &&
-	    image_check_hcrc(hdr)) {
-		return 1;
-	}
-	return 0;
-}
-
-int image_check_data(image_header_t *hdr)
-{
-	if (image_check_dcrc(hdr))
-		return 1;
-
-	return 0;
-}
-
-/*
- * SNOR (Serial NOR flash) related functions
- */
-void snor_init(void)
-{
-	struct smi_regs *const smicntl =
-		(struct smi_regs * const)CONFIG_SYS_SMI_BASE;
-
-	/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
-	writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
-	       &smicntl->smi_cr1);
-}
-
-static int snor_image_load(u8 *load_addr, void (**image_p)(void),
-			   const char *image_name)
-{
-	image_header_t *header;
-
-	/*
-	 * Since calculating the crc in the SNOR flash does not
-	 * work, we copy the image to the destination address
-	 * minus the header size. And point the header to this
-	 * new destination. This will not work for address 0
-	 * of course.
-	 */
-	header = (image_header_t *)load_addr;
-	memcpy((ulong *)(image_get_load(header) - sizeof(image_header_t)),
-	       (const ulong *)load_addr,
-	       image_get_data_size(header) + sizeof(image_header_t));
-	header = (image_header_t *)(image_get_load(header) -
-				    sizeof(image_header_t));
-
-	if (image_check_header(header, image_name)) {
-		if (image_check_data(header)) {
-			/* Jump to boot image */
-			*image_p = (void *)image_get_load(header);
-			return 1;
-		}
-	}
-
-	return 0;
-}
-
-static void boot_image(void (*image)(void))
-{
-	void (*funcp)(void) __noreturn = (void *)image;
-
-	(*funcp)();
-}
-
-/*
- * spl_boot:
- *
- * All supported booting types of all supported SoCs are listed here.
- * Generic readback APIs are provided for each supported booting type
- * eg. nand_read_skip_bad
- */
-u32 spl_boot(void)
-{
-	void (*image)(void);
-
-#ifdef CONFIG_SPEAR_USBTTY
-	plat_late_init();
-	return 1;
-#endif
-
-	/*
-	 * All the supported booting devices are listed here. Each of
-	 * the booting type supported by the platform would define the
-	 * macro xxx_BOOT_SUPPORTED to true.
-	 */
-
-	if (SNOR_BOOT_SUPPORTED && snor_boot_selected()) {
-		/* SNOR-SMI initialization */
-		snor_init();
-
-		serial_puts("Booting via SNOR\n");
-		/* Serial NOR booting */
-		if (1 == snor_image_load((u8 *)CONFIG_SYS_UBOOT_BASE,
-					    &image, loader_name)) {
-			/* Platform related late initialasations */
-			plat_late_init();
-
-			/* Jump to boot image */
-			serial_puts("Jumping to U-Boot\n");
-			boot_image(image);
-			return 1;
-		}
-	}
-
-	if (NAND_BOOT_SUPPORTED && nand_boot_selected()) {
-		/* NAND booting */
-		/* Not ported from XLoader to SPL yet */
-		return 0;
-	}
-
-	if (PNOR_BOOT_SUPPORTED && pnor_boot_selected()) {
-		/* PNOR booting */
-		/* Not ported from XLoader to SPL yet */
-		return 0;
-	}
-
-	if (MMC_BOOT_SUPPORTED && mmc_boot_selected()) {
-		/* MMC booting */
-		/* Not ported from XLoader to SPL yet */
-		return 0;
-	}
-
-	if (SPI_BOOT_SUPPORTED && spi_boot_selected()) {
-		/* SPI booting */
-		/* Not supported for any platform as of now */
-		return 0;
-	}
-
-	if (I2C_BOOT_SUPPORTED && i2c_boot_selected()) {
-		/* I2C booting */
-		/* Not supported for any platform as of now */
-		return 0;
-	}
-
-	/*
-	 * All booting types without memory are listed as below
-	 * Control has to be returned to BootROM in case of all
-	 * the following booting scenarios
-	 */
-
-	if (USB_BOOT_SUPPORTED && usb_boot_selected()) {
-		plat_late_init();
-		return 1;
-	}
-
-	if (TFTP_BOOT_SUPPORTED && tftp_boot_selected()) {
-		plat_late_init();
-		return 1;
-	}
-
-	if (UART_BOOT_SUPPORTED && uart_boot_selected()) {
-		plat_late_init();
-		return 1;
-	}
-
-	/* Ideally, the control should not reach here. */
-	hang();
-}

arch/arm/cpu/arm926ejs/spear/start.S

@@ -45,7 +45,6 @@ reset:
  * BSS area lies in the DDR location which is not yet initialized
  * bss is assumed to be uninitialized.
  */
-	bl	spl_boot
 	ldmia	sp!, {r0-r12,pc}
 
 /*
@@ -77,5 +76,5 @@ cpu_init_crit:
 	 * Go setup Memory and board specific bits prior to relocation.
 	 */
 	stmdb	sp!, {lr}
-	bl	lowlevel_init	/* go setup pll,mux,memory */
+	bl	_main	/* _main will call board_init_f */
 	ldmia	sp!, {pc}

arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds

@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2015 Stefan Roese <sr@denx.de>
+ *
  * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
  * on behalf of DENX Software Engineering GmbH
  *
@@ -11,59 +13,43 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
+MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
+		LENGTH = CONFIG_SPL_MAX_SIZE }
+
 OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 ENTRY(_start)
 SECTIONS
 {
-	. = 0x00000000;
-
-	. = ALIGN(4);
-	.text	:
+	.text      :
 	{
+		__start = .;
 		*(.vectors)
-		arch/arm/cpu/arm926ejs/spear/start.o	(.text*)
+		CPUDIR/spear/start.o	(.text*)
 		*(.text*)
-	}
+	} > .sram
 
 	. = ALIGN(4);
-	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+	.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
 
 	. = ALIGN(4);
-	.data : {
-		*(.data*)
-	}
+	.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
 
 	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	} > .sram
 
-	.rel.dyn : {
-		__rel_dyn_start = .;
-		*(.rel*)
-		__rel_dyn_end = .;
-	}
+	. = ALIGN(4);
+	__image_copy_end = .;
+	_end = .;
 
-	.bss : {
+	.bss :
+	{
 		. = ALIGN(4);
 		__bss_start = .;
 		*(.bss*)
 		. = ALIGN(4);
 		__bss_end = .;
-	}
-
-	.end :
-	{
-		*(.__end)
-	}
-
-	_image_binary_end = .;
-
-	.dynsym _image_binary_end : { *(.dynsym) }
-	.dynbss : { *(.dynbss) }
-	.dynstr : { *(.dynstr*) }
-	.dynamic : { *(.dynamic*) }
-	.hash : { *(.hash*) }
-	.plt : { *(.plt*) }
-	.interp : { *(.interp*) }
-	.gnu : { *(.gnu*) }
-	.ARM.exidx : { *(.ARM.exidx*) }
+	} > .sram
 }

arch/arm/include/asm/arch-spear/spr_defs.h

@@ -13,9 +13,7 @@ extern void setfreq(unsigned int, unsigned int);
 extern unsigned int setfreq_sz;
 
 void plat_ddr_init(void);
-void soc_init(void);
 void spear_late_init(void);
-void plat_late_init(void);
 
 int snor_boot_selected(void);
 int nand_boot_selected(void);

include/configs/x600.h

@@ -2,7 +2,7 @@
  * (C) Copyright 2009
  * Vipin Kumar, STMicroelectronics, <vipin.kumar@st.com>
  *
- * Copyright (C) 2012 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2012, 2015 Stefan Roese <sr@denx.de>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -162,7 +162,8 @@
 
 /* Use last 2 lwords in internal SRAM for bootcounter */
 #define CONFIG_BOOTCOUNT_LIMIT
-#define CONFIG_SYS_BOOTCOUNT_ADDR	0xd2801ff8
+#define CONFIG_SYS_BOOTCOUNT_ADDR		(CONFIG_SRAM_BASE + \
+						 CONFIG_SRAM_SIZE)
 
 #define CONFIG_HOSTNAME				x600
 #define CONFIG_UBI_PART				ubi0
@@ -248,8 +249,11 @@
 #define PHYS_SDRAM_1_MAXSIZE			0x40000000
 
 #define CONFIG_SYS_SDRAM_BASE			PHYS_SDRAM_1
-#define CONFIG_SYS_INIT_RAM_ADDR		0xD2800000
-#define CONFIG_SYS_INIT_RAM_SIZE		0x2000
+#define CONFIG_SRAM_BASE			0xd2800000
+/* Preserve the last 2 lwords for the boot-counter */
+#define CONFIG_SRAM_SIZE			((8 << 10) - 0x8)
+#define CONFIG_SYS_INIT_RAM_ADDR		CONFIG_SRAM_BASE
+#define CONFIG_SYS_INIT_RAM_SIZE		CONFIG_SRAM_SIZE
 
 #define CONFIG_SYS_INIT_SP_OFFSET		\
 	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
@@ -260,10 +264,13 @@
 /*
  * SPL related defines
  */
-#define CONFIG_SPL_TEXT_BASE	0xd2800b00
+#define CONFIG_SPL_TEXT_BASE		0xd2800b00
+#define CONFIG_SPL_MAX_SIZE		(CONFIG_SRAM_SIZE - 0xb00)
 #define	CONFIG_SPL_START_S_PATH	"arch/arm/cpu/arm926ejs/spear"
 #define CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds"
 
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_NOR_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_LIBCOMMON_SUPPORT	/* image.c */
 #define CONFIG_SPL_LIBGENERIC_SUPPORT	/* string.c */