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>

6 files changed, 73 insertions, 264 deletions

diff --git a/arch/arm/cpu/arm926ejs/spear/Makefile b/arch/arm/cpu/arm926ejs/spear/Makefile
index 3f190bc..7b15d4e 100644
--- a/arch/arm/cpu/arm926ejs/spear/Makefile
+++ b/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
diff --git a/arch/arm/cpu/arm926ejs/spear/spear600.c b/arch/arm/cpu/arm926ejs/spear/spear600.c
index 6474e9d..1fdf715 100644
--- a/arch/arm/cpu/arm926ejs/spear/spear600.c
+++ b/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;
@@ -104,14 +119,6 @@ void plat_ddr_init(void)
 }
 
 /*
- * soc_init:
- */
-void soc_init(void)
-{
-	/* Nothing to be done for SPEAr600 */
-}
-
-/*
  * xxx_boot_selected:
  *
  * return true if the particular booting option is selected
diff --git a/arch/arm/cpu/arm926ejs/spear/spl.c b/arch/arm/cpu/arm926ejs/spear/spl.c
index b550404..a60f583 100644
--- a/arch/arm/cpu/arm926ejs/spear/spl.c
+++ b/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);
 }
diff --git a/arch/arm/cpu/arm926ejs/spear/spl_boot.c b/arch/arm/cpu/arm926ejs/spear/spl_boot.c
deleted file mode 100644
index c846d75..0000000
--- a/arch/arm/cpu/arm926ejs/spear/spl_boot.c
+++ /dev/null
@@ -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();
-}
diff --git a/arch/arm/cpu/arm926ejs/spear/start.S b/arch/arm/cpu/arm926ejs/spear/start.S
index 290ac2e..f392e7b 100644
--- a/arch/arm/cpu/arm926ejs/spear/start.S
+++ b/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}
diff --git a/arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds b/arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds
index c7ee199..47910d3 100644
--- a/arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds
+++ b/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
 }