[U-Boot] [PATCH] zynq: Add support for U-BOOT SPL
Michal Simek
michal.simek at xilinx.com
Fri Feb 7 14:56:34 CET 2014
SPL is using ps7_init.c/h files which are generated
from design tools which have to be copied to
boards/xilinx/zynq folder before compilation.
BSS section is moved to SDRAM because fat support
requires more space than SRAM size.
Added:
- MMC and QSPI support
- Boot OS directly from SPL
- Enable SPL command
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---
arch/arm/cpu/armv7/zynq/Makefile | 1 +
arch/arm/cpu/armv7/zynq/cpu.c | 4 +-
arch/arm/cpu/armv7/zynq/spl.c | 69 ++++++++++++++++++++++++++++++
arch/arm/cpu/armv7/zynq/u-boot-spl.lds | 61 +++++++++++++++++++++++++++
arch/arm/include/asm/arch-zynq/spl.h | 18 ++++++++
board/xilinx/zynq/Makefile | 1 +
board/xilinx/zynq/ps7_init.c | 12 ++++++
include/configs/zynq-common.h | 77 ++++++++++++++++++++++++++++++++++
8 files changed, 241 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/cpu/armv7/zynq/spl.c
create mode 100644 arch/arm/cpu/armv7/zynq/u-boot-spl.lds
create mode 100644 arch/arm/include/asm/arch-zynq/spl.h
create mode 100644 board/xilinx/zynq/ps7_init.c
diff --git a/arch/arm/cpu/armv7/zynq/Makefile b/arch/arm/cpu/armv7/zynq/Makefile
index 3374789..3363a3c 100644
--- a/arch/arm/cpu/armv7/zynq/Makefile
+++ b/arch/arm/cpu/armv7/zynq/Makefile
@@ -13,3 +13,4 @@ obj-y += cpu.o
obj-y += ddrc.o
obj-y += slcr.o
obj-y += clk.o
+obj-$(CONFIG_SPL_BUILD) += spl.o
diff --git a/arch/arm/cpu/armv7/zynq/cpu.c b/arch/arm/cpu/armv7/zynq/cpu.c
index 5d505dd..7626b5c 100644
--- a/arch/arm/cpu/armv7/zynq/cpu.c
+++ b/arch/arm/cpu/armv7/zynq/cpu.c
@@ -17,7 +17,7 @@ void lowlevel_init(void)
int arch_cpu_init(void)
{
zynq_slcr_unlock();
-
+#ifndef CONFIG_SPL_BUILD
/* Device config APB, unlock the PCAP */
writel(0x757BDF0D, &devcfg_base->unlock);
writel(0xFFFFFFFF, &devcfg_base->rom_shadow);
@@ -35,7 +35,7 @@ int arch_cpu_init(void)
/* Urgent write, ports S2/S3 */
writel(0xC, &slcr_base->ddr_urgent);
#endif
-
+#endif
zynq_clk_early_init();
zynq_slcr_lock();
diff --git a/arch/arm/cpu/armv7/zynq/spl.c b/arch/arm/cpu/armv7/zynq/spl.c
new file mode 100644
index 0000000..fcad762
--- /dev/null
+++ b/arch/arm/cpu/armv7/zynq/spl.c
@@ -0,0 +1,69 @@
+/*
+ * (C) Copyright 2014 Xilinx, Inc. Michal Simek
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <spl.h>
+
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/spl.h>
+#include <asm/arch/sys_proto.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_init_f(ulong dummy)
+{
+ ps7_init();
+
+ /* Clear the BSS. */
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ /* Set global data pointer. */
+ gd = &gdata;
+
+ preloader_console_init();
+ arch_cpu_init();
+ board_init_r(NULL, 0);
+}
+
+u32 spl_boot_device(void)
+{
+ u32 mode;
+
+ switch ((zynq_slcr_get_boot_mode()) & ZYNQ_BM_MASK) {
+#ifdef CONFIG_SPL_SPI_SUPPORT
+ case ZYNQ_BM_QSPI:
+ puts("qspi boot\n");
+ mode = BOOT_DEVICE_SPI;
+ break;
+#endif
+#ifdef CONFIG_SPL_MMC_SUPPORT
+ case ZYNQ_BM_SD:
+ puts("mmc boot\n");
+ mode = BOOT_DEVICE_MMC1;
+ break;
+#endif
+ default:
+ puts("Unsupported boot mode selected\n");
+ hang();
+ }
+
+ return mode;
+}
+
+#ifdef CONFIG_SPL_MMC_SUPPORT
+u32 spl_boot_mode(void)
+{
+ return MMCSD_MODE_FAT;
+}
+#endif
+
+#ifdef CONFIG_SPL_OS_BOOT
+int spl_start_uboot(void)
+{
+ /* boot linux */
+ return 0;
+}
+#endif
diff --git a/arch/arm/cpu/armv7/zynq/u-boot-spl.lds b/arch/arm/cpu/armv7/zynq/u-boot-spl.lds
new file mode 100644
index 0000000..0c4501e
--- /dev/null
+++ b/arch/arm/cpu/armv7/zynq/u-boot-spl.lds
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2014 Xilinx, Inc. Michal Simek
+ * Copyright (c) 2004-2008 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj at denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
+ LENGTH = CONFIG_SPL_MAX_SIZE }
+MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
+ LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+ . = ALIGN(4);
+ .text :
+ {
+ __image_copy_start = .;
+ CPUDIR/start.o (.text*)
+ *(.text*)
+ } > .sram
+
+ . = ALIGN(4);
+ .rodata : {
+ *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+ } > .sram
+
+ . = ALIGN(4);
+ .data : {
+ *(.data*)
+ } > .sram
+
+ . = ALIGN(4);
+
+ . = .;
+
+ __image_copy_end = .;
+
+ _end = .;
+
+ /* Move BSS section to RAM because of FAT */
+ .bss (NOLOAD) : {
+ __bss_start = .;
+ *(.bss*)
+ . = ALIGN(4);
+ __bss_end = .;
+ } > .sdram
+
+ /DISCARD/ : { *(.dynsym) }
+ /DISCARD/ : { *(.dynstr*) }
+ /DISCARD/ : { *(.dynamic*) }
+ /DISCARD/ : { *(.plt*) }
+ /DISCARD/ : { *(.interp*) }
+ /DISCARD/ : { *(.gnu*) }
+}
diff --git a/arch/arm/include/asm/arch-zynq/spl.h b/arch/arm/include/asm/arch-zynq/spl.h
new file mode 100644
index 0000000..5789d28
--- /dev/null
+++ b/arch/arm/include/asm/arch-zynq/spl.h
@@ -0,0 +1,18 @@
+/*
+ * (C) Copyright 2014 Xilinx, Inc. Michal Simek
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#ifndef _ASM_ARCH_SPL_H_
+#define _ASM_ARCH_SPL_H_
+
+extern void ps7_init(void);
+
+#define BOOT_DEVICE_NONE 0
+#define BOOT_DEVICE_RAM 1
+#define BOOT_DEVICE_SPI 2
+#define BOOT_DEVICE_MMC1 3
+#define BOOT_DEVICE_MMC2 4
+#define BOOT_DEVICE_MMC2_2 5
+
+#endif
diff --git a/board/xilinx/zynq/Makefile b/board/xilinx/zynq/Makefile
index 6301a8c..3f19a1c 100644
--- a/board/xilinx/zynq/Makefile
+++ b/board/xilinx/zynq/Makefile
@@ -6,3 +6,4 @@
#
obj-y := board.o
+obj-$(CONFIG_SPL_BUILD) += ps7_init.o
diff --git a/board/xilinx/zynq/ps7_init.c b/board/xilinx/zynq/ps7_init.c
new file mode 100644
index 0000000..c47da09
--- /dev/null
+++ b/board/xilinx/zynq/ps7_init.c
@@ -0,0 +1,12 @@
+/*
+ * (C) Copyright 2014 Xilinx, Inc. Michal Simek
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <asm/arch/spl.h>
+
+__weak void ps7_init(void)
+{
+ puts("Please copy ps7_init.c/h from hw project\n");
+}
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index d6dc745..c7eee0a 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -228,4 +228,81 @@
#define CONFIG_CMD_MII
#define CONFIG_CMD_TFTPPUT
+/* SPL part */
+#define CONFIG_SPL
+#define CONFIG_CMD_SPL
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+
+#define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/zynq/u-boot-spl.lds"
+
+/* Disable dcache for SPL just for sure */
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SYS_DCACHE_OFF
+#undef CONFIG_FPGA
+#endif
+
+/* MMC support */
+#ifdef CONFIG_ZYNQ_SDHCI0
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 0x300 /* address 0x60000 */
+#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS 0x200 /* 256 KB */
+#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 1
+#define CONFIG_SPL_LIBDISK_SUPPORT
+#define CONFIG_SPL_FAT_SUPPORT
+#define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME "u-boot.img"
+#endif
+
+/* Address in RAM where the parameters must be copied by SPL. */
+#define CONFIG_SYS_SPL_ARGS_ADDR 0x10000000
+
+#define CONFIG_SPL_FAT_LOAD_ARGS_NAME "system.dtb"
+#define CONFIG_SPL_FAT_LOAD_KERNEL_NAME "uImage"
+
+/* Not using MMC raw mode - just for compilation purpose */
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR 0
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS 0
+#define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 0
+
+/* qspi mode is working fine */
+#ifdef CONFIG_ZYNQ_QSPI
+#define CONFIG_SPL_SPI_SUPPORT
+#define CONFIG_SPL_SPI_LOAD
+#define CONFIG_SPL_SPI_FLASH_SUPPORT
+#define CONFIG_SPL_SPI_BUS 0
+#define CONFIG_SYS_SPI_U_BOOT_OFFS 0x100000
+#define CONFIG_SPL_SPI_CS 0
+#endif
+
+/* for booting directly linux */
+#define CONFIG_SPL_OS_BOOT
+
+/* SP location before relocation, must use scratch RAM */
+#define CONFIG_SPL_TEXT_BASE 0x0
+
+/* 3 * 64kB blocks of OCM - one is on the top because of bootrom */
+#define CONFIG_SPL_MAX_SIZE 0x30000
+
+/* The highest 64k OCM address */
+#define OCM_HIGH_ADDR 0xffff0000
+
+/* Just define any reasonable size */
+#define CONFIG_SPL_STACK_SIZE 0x1000
+
+/* SPL stack position - and stack goes down */
+#define CONFIG_SPL_STACK (OCM_HIGH_ADDR + CONFIG_SPL_STACK_SIZE)
+
+/* On the top of OCM space */
+#define CONFIG_SYS_SPL_MALLOC_START (CONFIG_SPL_STACK + \
+ GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_SPL_MALLOC_SIZE 0x1000
+
+/* BSS setup */
+#define CONFIG_SPL_BSS_START_ADDR 0x100000
+#define CONFIG_SPL_BSS_MAX_SIZE 0x100000
+
+#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
+
#endif /* __CONFIG_ZYNQ_COMMON_H */
--
1.8.2.3
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: not available
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20140207/7a88424e/attachment.pgp>
More information about the U-Boot
mailing list