[U-Boot-Users] [PATCH] OneNAND Initial Program Loader (IPL) support
Kyungmin Park
kmpark at infradead.org
Wed Sep 19 09:39:46 CEST 2007
Hi,
This patch enables the OneNAND boot within U-Boot.
Before this work, we used another OneNAND IPL called X-Loader based on open source.
With this work, we can build the oneboot.bin image without other program.
The build sequence is simple.
First, it compiles the u-boot.bin
Second, it compiles OneNAND IPL
Finally, it becomes the oneboot.bin from OneNAND IPL and u-boot.bin
The mechanism is similar with NAND boot except it boots from itself.
Another thing is that you can only use the OneNAND IPL only to work other bootloader such as RedBoot and so on.
Any comments are welcome.
Thank you,
Kyungmin Park
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
diff --git a/Makefile b/Makefile
index d680ad0..de8c0ea 100644
--- a/Makefile
+++ b/Makefile
@@ -251,13 +251,18 @@ NAND_SPL = nand_spl
U_BOOT_NAND = $(obj)u-boot-nand.bin
endif
+ifeq ($(CONFIG_ONENAND_U_BOOT),y)
+ONENAND_IPL = onenand_ipl
+U_BOOT_ONENAND = $(obj)u-boot-onenand.bin
+endif
+
__OBJS := $(subst $(obj),,$(OBJS))
__LIBS := $(subst $(obj),,$(LIBS))
#########################################################################
#########################################################################
-ALL += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map $(U_BOOT_NAND)
+ALL += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map $(U_BOOT_NAND) $(U_BOOT_ONENAND)
all: $(ALL)
@@ -304,6 +309,12 @@ $(NAND_SPL): version
$(U_BOOT_NAND): $(NAND_SPL) $(obj)u-boot.bin
cat $(obj)nand_spl/u-boot-spl-16k.bin $(obj)u-boot.bin > $(obj)u-boot-nand.bin
+$(ONENAND_IPL): version
+ $(MAKE) -C onenand_ipl/board/$(BOARDDIR) all
+
+$(U_BOOT_ONENAND): $(ONENAND_IPL) $(obj)u-boot.bin
+ cat $(obj)onenand_ipl/onenand-ipl-2k.bin $(obj)u-boot.bin > $(obj)oneboot.bin
+
version:
@echo -n "#define U_BOOT_VERSION \"U-Boot " > $(VERSION_FILE); \
echo -n "$(U_BOOT_VERSION)" >> $(VERSION_FILE); \
@@ -2361,6 +2372,7 @@ omap2420h4_config : unconfig
apollon_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm1136 apollon
+ @echo "CONFIG_ONENAND_U_BOOT = y" >> $(obj)include/config.mk
#========================================================================
# i386
@@ -2621,6 +2633,7 @@ clean:
rm -f $(obj)board/bf537-stamp/u-boot.lds $(obj)board/bf561-ezkit/u-boot.lds
rm -f $(obj)include/bmp_logo.h
rm -f $(obj)nand_spl/u-boot-spl $(obj)nand_spl/u-boot-spl.map
+ rm -f $(obj)onenand_ipl/onenand-ipl $(obj)onenand_ipl/onenand-ipl.map
clobber: clean
find $(OBJTREE) -type f \( -name .depend \
@@ -2634,6 +2647,7 @@ clobber: clean
rm -f $(obj)tools/inca-swap-bytes $(obj)cpu/mpc824x/bedbug_603e.c
rm -f $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm
[ ! -d $(OBJTREE)/nand_spl ] || find $(obj)nand_spl -lname "*" -print | xargs rm -f
+ [ ! -d $(OBJTREE)/onenand_ipl ] || find $(obj)onenand_ipl -lname "*" -print | xargs rm -f
ifeq ($(OBJTREE),$(SRCTREE))
mrproper \
diff --git a/board/apollon/apollon.c b/board/apollon/apollon.c
index 064d143..383b064 100644
--- a/board/apollon/apollon.c
+++ b/board/apollon/apollon.c
@@ -440,7 +440,8 @@ void muxSetupTouchScreen(void)
void muxSetupGPMC(void)
{
/* gpmc_io_dir, MCR */
- writel(0x4800008C, 0x19000000);
+ volatile unsigned int *MCR = (unsigned int *) 0x4800008C;
+ *MCR = 0x19000000;
/* NOR FLASH CS0 */
/* signal - Gpmc_clk; pin - J4; offset - 0x0088; mode 0; Byte-3 */
diff --git a/cpu/arm1136/start.S b/cpu/arm1136/start.S
index 17c7a83..b272d2f 100644
--- a/cpu/arm1136/start.S
+++ b/cpu/arm1136/start.S
@@ -35,6 +35,25 @@
#endif
.globl _start
_start: b reset
+#ifdef CONFIG_ONENAND_IPL
+ ldr pc, _hang
+ ldr pc, _hang
+ ldr pc, _hang
+ ldr pc, _hang
+ ldr pc, _hang
+ ldr pc, _hang
+ ldr pc, _hang
+
+_hang:
+ .word do_hang
+ .word 0x12345678
+ .word 0x12345678
+ .word 0x12345678
+ .word 0x12345678
+ .word 0x12345678
+ .word 0x12345678
+ .word 0x12345678 /* now 16*4=64 */
+#else
ldr pc, _undefined_instruction
ldr pc, _software_interrupt
ldr pc, _prefetch_abort
@@ -51,6 +70,7 @@ _not_used: .word not_used
_irq: .word irq
_fiq: .word fiq
_pad: .word 0x12345678 /* now 16*4=64 */
+#endif /* CONFIG_ONENAND_IPL */
.global _end_vect
_end_vect:
@@ -139,7 +159,10 @@ relocate: /* relocate U-Boot to RAM */
adr r0, _start /* r0 <- current position of code */
ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
cmp r0, r1 /* don't reloc during debug */
+#ifndef CONFIG_ONENAND_IPL
beq stack_setup
+#endif /* CONFIG_ONENAND_IPL */
+
ldr r2, _armboot_start
ldr r3, _bss_start
@@ -156,26 +179,36 @@ copy_loop:
/* Set up the stack */
stack_setup:
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
+#ifdef CONFIG_ONENAND_IPL
+ sub sp, r0, #128 /* leave 32 words for abort-stack */
+#else
sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
#ifdef CONFIG_USE_IRQ
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+#endif /* CONFIG_ONENAND_IPL */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
ldr r1, _bss_end /* stop here */
mov r2, #0x00000000 /* clear */
+#ifndef CONFIG_ONENAND_IPL
clbss_l:str r2, [r0] /* clear loop... */
add r0, r0, #4
cmp r0, r1
bne clbss_l
+#endif
ldr pc, _start_armboot
+#ifdef CONFIG_ONENAND_IPL
+_start_armboot: .word start_oneboot
+#else
_start_armboot: .word start_armboot
+#endif
/*
@@ -214,6 +247,8 @@ cpu_init_crit:
bl lowlevel_init /* go setup pll,mux,memory */
mov lr, ip /* restore link */
mov pc, lr /* back to my caller */
+
+#ifndef CONFIG_ONENAND_IPL
/*
*************************************************************************
*
@@ -326,10 +361,17 @@ cpu_init_crit:
.macro get_fiq_stack @ setup FIQ stack
ldr sp, FIQ_STACK_START
.endm
+#endif /* CONFIG_ONENAND_IPL */
/*
* exception handlers
*/
+#ifdef CONFIG_ONENAND_IPL
+ .align 5
+do_hang:
+ ldr sp, _TEXT_BASE /* use 32 words about stack */
+ bl hang /* hang and never return */
+#else
.align 5
undefined_instruction:
get_bad_stack
@@ -415,3 +457,4 @@ rstctl:
.word PM_RSTCTRL_WKUP
#endif
+#endif /* CONFIG_ONENAND_IPL */
diff --git a/include/configs/apollon.h b/include/configs/apollon.h
index 49fd234..d6ecc72 100644
--- a/include/configs/apollon.h
+++ b/include/configs/apollon.h
@@ -35,6 +35,7 @@
#define CONFIG_OMAP2420 1 /* which is in a 2420 */
#define CONFIG_OMAP2420_APOLLON 1
#define CONFIG_APOLLON 1
+
#define CONFIG_APOLLON_PLUS 1 /* If you have apollon plus 1.x */
/* Clock config to target*/
diff --git a/onenand_ipl/board/apollon/Makefile b/onenand_ipl/board/apollon/Makefile
new file mode 100644
index 0000000..f6cdae1
--- /dev/null
+++ b/onenand_ipl/board/apollon/Makefile
@@ -0,0 +1,67 @@
+
+include $(TOPDIR)/config.mk
+include $(TOPDIR)/include/config.mk
+include $(TOPDIR)/onenand_ipl/board/$(BOARDDIR)/config.mk
+
+LDSCRIPT= $(TOPDIR)/onenand_ipl/board/$(BOARDDIR)/u-boot.onenand.lds
+LDFLAGS = -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
+AFLAGS += -DCONFIG_ONENAND_IPL
+CFLAGS += -DCONFIG_ONENAND_IPL
+OBJCLFAGS += --gap-fill=0x00
+
+SOBJS = start.o low_levelinit.o _memcpy32.o
+COBJS = apollon.o onenand_read.o onenand_boot.o
+
+SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+__OBJS := $(SOBJS) $(COBJS)
+LNDIR := $(OBJTREE)/onenand_ipl/board/$(BOARDDIR)
+
+onenandobj := $(OBJTREE)/onenand_ipl/
+
+ALL = $(onenandobj)onenand-ipl $(onenandobj)onenand-ipl.bin $(onenandobj)onenand-ipl-2k.bin
+
+all: $(obj).depend $(ALL)
+
+$(onenandobj)onenand-ipl-2k.bin: $(onenandobj)onenand-ipl
+ $(OBJCOPY) ${OBJCFLAGS} --pad-to=0x800 -O binary $< $@
+ ls -al $(onenandobj)
+
+$(onenandobj)onenand-ipl.bin: $(onenandobj)onenand-ipl
+ $(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
+
+$(onenandobj)onenand-ipl: $(OBJS)
+ echo abc
+ cd $(LNDIR) && $(LD) $(LDFLAGS) $$UNDEF_SYM $(__OBJS) \
+ -Map $(onenandobj)onenand-ipl.map \
+ -o $(onenandobj)onenand-ipl
+
+# create symbolic links from common files
+
+# from cpu directory
+$(obj)start.S:
+ rm -f $(obj)start.S
+ ln -s $(SRCTREE)/cpu/$(CPU)/start.S $(obj)start.S
+
+# from onenand_ipl directory
+$(obj)onenand_ipl.h:
+ rm -f $(obj)onenand_ipl.h
+ ln -s $(SRCTREE)/onenand_ipl/onenand_ipl.h $(obj)onenand_ipl.h
+
+$(obj)onenand_boot.c: $(obj)onenand_ipl.h
+ rm -f $(obj)onenand_boot.c
+ ln -s $(SRCTREE)/onenand_ipl/onenand_boot.c $(obj)onenand_boot.c
+
+$(obj)onenand_read.c: $(obj)onenand_ipl.h
+ rm -f $(obj)onenand_read.c
+ ln -s $(SRCTREE)/onenand_ipl/onenand_read.c $(obj)onenand_read.c
+
+$(obj)%.o: $(obj)%.S
+ $(CC) $(AFLAGS) -c -o $@ $<
+
+$(obj)%.o: $(obj)$.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
diff --git a/onenand_ipl/board/apollon/apollon.c b/onenand_ipl/board/apollon/apollon.c
new file mode 100644
index 0000000..61a8428
--- /dev/null
+++ b/onenand_ipl/board/apollon/apollon.c
@@ -0,0 +1,71 @@
+/*
+ * (C) Copyright 2005
+ * Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/arch/mux.h>
+
+#define write_config_reg(reg, value) \
+do { \
+ writeb(value, reg); \
+} while (0)
+
+/*****************************************
+ * Routine: board_init
+ * Description: Early hardware init.
+ *****************************************/
+int board_init(void)
+{
+ return 0;
+}
+
+#ifdef CFG_PRINTF
+/* Pin Muxing registers used for UART1 */
+/****************************************
+ * Routine: muxSetupUART1 (ostboot)
+ * Description: Set up uart1 muxing
+ *****************************************/
+static void muxSetupUART1(void)
+{
+ /* UART1_CTS pin configuration, PIN = D21 */
+ write_config_reg(CONTROL_PADCONF_UART1_CTS, 0);
+ /* UART1_RTS pin configuration, PIN = H21 */
+ write_config_reg(CONTROL_PADCONF_UART1_RTS, 0);
+ /* UART1_TX pin configuration, PIN = L20 */
+ write_config_reg(CONTROL_PADCONF_UART1_TX, 0);
+ /* UART1_RX pin configuration, PIN = T21 */
+ write_config_reg(CONTROL_PADCONF_UART1_RX, 0);
+}
+#endif
+
+/**********************************************************
+ * Routine: s_init
+ * Description: Does early system init of muxing and clocks.
+ * - Called at time when only stack is available.
+ **********************************************************/
+int s_init(int skip)
+{
+#ifdef CFG_PRINTF
+ muxSetupUART1();
+#endif
+ return 0;
+}
diff --git a/onenand_ipl/board/apollon/config.mk b/onenand_ipl/board/apollon/config.mk
new file mode 100644
index 0000000..12873a0
--- /dev/null
+++ b/onenand_ipl/board/apollon/config.mk
@@ -0,0 +1,14 @@
+#
+# (C) Copyright 2005-2007 Samsung Elcronics
+# Kyungmin Park <kyungmin.park at samsung.com>
+#
+# Samsung Apollon board with OMAP2420 (ARM1136) cpu
+#
+# Apollon has 1 bank of 128MB mDDR-SDRAM on CS0
+# Physical Address:
+# 8000'0000 (bank0)
+# 8800'0000 (bank1)
+# Linux-Kernel is expected to be at 8000'8000, entry 8000'8000
+# (mem base + reserved)
+
+TEXT_BASE = 0x00000000
diff --git a/onenand_ipl/board/apollon/low_levelinit.S b/onenand_ipl/board/apollon/low_levelinit.S
new file mode 100644
index 0000000..0ffa36f
--- /dev/null
+++ b/onenand_ipl/board/apollon/low_levelinit.S
@@ -0,0 +1,205 @@
+/*
+ * Board specific setup info
+ *
+ * (C) Copyright 2005-2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * Derived from board/omap2420h4/platform.S
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <asm/arch/omap2420.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/clocks.h>
+
+#define APOLLON_CS0_BASE 0x00000000
+
+#ifdef PRCM_CONFIG_I
+#define SDRC_ACTIM_CTRLA_0_VAL 0x7BA35907
+#define SDRC_ACTIM_CTRLB_0_VAL 0x00000013
+#define SDRC_RFR_CTRL_0_VAL 0x00044C01
+
+/* GPMC */
+#define APOLLON_GPMC_CONFIG1_0 0xe30d1201
+#define APOLLON_GPMC_CONFIG2_0 0x000c1000
+#define APOLLON_GPMC_CONFIG3_0 0x00030400
+#define APOLLON_GPMC_CONFIG4_0 0x0B841006
+#define APOLLON_GPMC_CONFIG5_0 0x020F0C11
+#define APOLLON_GPMC_CONFIG6_0 0x00000000
+#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24))
+
+#elif defined(PRCM_CONFIG_II)
+#define SDRC_ACTIM_CTRLA_0_VAL 0x4A59B485
+#define SDRC_ACTIM_CTRLB_0_VAL 0x0000000C
+#define SDRC_RFR_CTRL_0_VAL 0x00030001
+
+/* GPMC */
+#define APOLLON_GPMC_CONFIG1_0 0xe30d1201
+#define APOLLON_GPMC_CONFIG2_0 0x00080E81
+#define APOLLON_GPMC_CONFIG3_0 0x00030400
+#define APOLLON_GPMC_CONFIG4_0 0x08041586
+#define APOLLON_GPMC_CONFIG5_0 0x020C090E
+#define APOLLON_GPMC_CONFIG6_0 0x00000000
+#define APOLLON_GPMC_CONFIG7_0 (0x00000e40 | (APOLLON_CS0_BASE >> 24))
+
+#else
+#error "Please configure PRCM schecm"
+#endif
+
+_TEXT_BASE:
+ .word TEXT_BASE /* sdram load addr from config.mk */
+
+.globl lowlevel_init
+lowlevel_init:
+ mov r3, r0 /* save skip information */
+
+ /* Disable watchdog */
+ ldr r0, =WD2_BASE
+ ldr r1, =WD_UNLOCK1
+ str r1, [r0, #WSPR]
+
+ ldr r1, =WD_UNLOCK2
+ str r1, [r0, #WSPR]
+
+#ifdef DEBUG_LED
+ /* LED0 OFF */
+ ldr r0, =0x480000E5 /* ball AA10, mode 3 */
+ mov r1, #0x0b
+ strb r1, [r0]
+#endif
+
+ /* Pin muxing for SDRC */
+ mov r1, #0x00
+ ldr r0, =0x480000A1 /* ball C12, mode 0 */
+ strb r1, [r0]
+
+ ldr r0, =0x48000032 /* ball D11, mode 0 */
+ strb r1, [r0]
+
+ ldr r0, =0x480000A3 /* ball B13, mode 0 */
+ strb r1, [r0]
+
+ /* SDRC setting */
+ ldr r0, =OMAP2420_SDRC_BASE
+ ldr r1, =0x00000010
+ str r1, [r0, #0x10]
+
+ ldr r1, =0x00000100
+ str r1, [r0, #0x44]
+
+ /* SDRC CS0 configuration */
+#ifdef CONFIG_APOLLON_PLUS
+ ldr r1, =0x01702011
+#else
+ ldr r1, =0x00d04011
+#endif
+ str r1, [r0, #0x80]
+
+ ldr r1, =SDRC_ACTIM_CTRLA_0_VAL
+ str r1, [r0, #0x9C]
+
+ ldr r1, =SDRC_ACTIM_CTRLB_0_VAL
+ str r1, [r0, #0xA0]
+
+ ldr r1, =SDRC_RFR_CTRL_0_VAL
+ str r1, [r0, #0xA4]
+
+ ldr r1, =0x00000041
+ str r1, [r0, #0x70]
+
+ /* Manual command sequence */
+ ldr r1, =0x00000007
+ str r1, [r0, #0xA8]
+
+ ldr r1, =0x00000000
+ str r1, [r0, #0xA8]
+
+ ldr r1, =0x00000001
+ str r1, [r0, #0xA8]
+
+ ldr r1, =0x00000002
+ str r1, [r0, #0xA8]
+ str r1, [r0, #0xA8]
+
+ /*
+ * CS0 SDRC Mode register
+ * Burst length = 4 - DDR memory
+ * Serial mode
+ * CAS latency = 3
+ */
+ ldr r1, =0x00000032
+ str r1, [r0, #0x84]
+
+ /* Note: You MUST set EMR values */
+ /* EMR1 & EMR2 */
+ ldr r1, =0x00000000
+ str r1, [r0, #0x88]
+ str r1, [r0, #0x8C]
+
+#ifdef OLD_SDRC_DLLA_CTRL
+ /* SDRC_DLLA_CTRL */
+ ldr r1, =0x00007306
+ str r1, [r0, #0x60]
+
+ ldr r1, =0x00007303
+ str r1, [r0, #0x60]
+#else
+ /* SDRC_DLLA_CTRL */
+ ldr r1, =0x00000506
+ str r1, [r0, #0x60]
+
+ ldr r1, =0x00000503
+ str r1, [r0, #0x60]
+#endif
+
+#ifdef __BROKEN_FEATURE__
+ /* SDRC_DLLB_CTRL */
+ ldr r1, =0x00000506
+ str r1, [r0, #0x68]
+
+ ldr r1, =0x00000503
+ str r1, [r0, #0x68]
+#endif
+
+ /* little delay after init */
+ mov r2, #0x1800
+1:
+ subs r2, r2, #0x1
+ bne 1b
+
+ ldr sp, SRAM_STACK
+ str ip, [sp] /* stash old link register */
+ mov ip, lr /* save link reg across call */
+ mov r0, r3 /* pass skip info to s_init */
+
+ bl s_init /* go setup pll,mux,memory */
+
+ ldr ip, [sp] /* restore save ip */
+ mov lr, ip /* restore link reg */
+
+ /* back to arch calling code */
+ mov pc, lr
+
+ /* the literal pools origin */
+ .ltorg
+
+SRAM_STACK:
+ .word LOW_LEVEL_SRAM_STACK
diff --git a/onenand_ipl/board/apollon/u-boot.onenand.lds b/onenand_ipl/board/apollon/u-boot.onenand.lds
new file mode 100644
index 0000000..3d18fad
--- /dev/null
+++ b/onenand_ipl/board/apollon/u-boot.onenand.lds
@@ -0,0 +1,53 @@
+/*
+ * (C) Copyright 2005-2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * Derived from X-loader
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+ . = 0x00000000;
+
+ . = ALIGN(4);
+ .text :
+ {
+ start.o (.text)
+ *(.text)
+ }
+
+ . = ALIGN(4);
+ .rodata : { *(.rodata) }
+
+ . = ALIGN(4);
+ .data : { *(.data) }
+
+ . = ALIGN(4);
+ .got : { *(.got) }
+
+ . = ALIGN(4);
+ __bss_start = .;
+ .bss : { *(.bss) }
+ _end = .;
+}
diff --git a/onenand_ipl/onenand_boot.c b/onenand_ipl/onenand_boot.c
new file mode 100644
index 0000000..c0005f7
--- /dev/null
+++ b/onenand_ipl/onenand_boot.c
@@ -0,0 +1,81 @@
+/*
+ * (C) Copyright 2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * Derived from x-loader
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <version.h>
+
+#include "onenand_ipl.h"
+
+#ifdef CFG_PRINTF
+int print_info(void)
+{
+ printf(XLOADER_VERSION);
+
+ return 0;
+}
+#endif
+
+typedef int (init_fnc_t)(void);
+
+init_fnc_t *init_sequence[] = {
+ board_init, /* basic board dependent setup */
+#ifdef CFG_PRINTF
+ serial_init, /* serial communications setup */
+ print_info,
+#endif
+ NULL,
+};
+
+void start_oneboot(void)
+{
+ init_fnc_t **init_fnc_ptr;
+ uchar *buf;
+
+ for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+ if ((*init_fnc_ptr)() != 0)
+ hang();
+ }
+
+ buf = (uchar *) CFG_LOAD_ADDR;
+
+ if (!onenand_read_block(buf, ONENAND_START_BLOCK))
+ buf += ONENAND_BLOCK_SIZE;
+
+ if (buf == (uchar *)CFG_LOAD_ADDR)
+ hang();
+
+ /* go run U-Boot and never return */
+ printf("Starting OS Bootloader...\n");
+ ((init_fnc_t *)CFG_LOAD_ADDR)();
+
+ /* should never come here */
+}
+
+void hang(void)
+{
+ /* if board_hang() returns, hange here */
+ printf("X-Loader hangs\n");
+ for (;;);
+}
diff --git a/onenand_ipl/onenand_ipl.h b/onenand_ipl/onenand_ipl.h
new file mode 100644
index 0000000..ec8ca3a
--- /dev/null
+++ b/onenand_ipl/onenand_ipl.h
@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright 2007 Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _ONENAND_IPL_H
+#define _ONENAND_IPL_H
+
+#include <linux/mtd/onenand_regs.h>
+
+#define ONENAND_START_BLOCK 0
+#define ONENAND_BLOCK_SIZE 2048
+
+#ifndef CFG_PRINTF
+#define printf(format, args...)
+#endif
+
+#define onenand_readw(a) readw(a)
+#define onenand_writew(v, a) writew(v, a)
+
+#define THIS_ONENAND(a) (CFG_ONENAND_BASE + (a))
+
+#define READ_INTERRUPT() \
+ onenand_readw(THIS_ONENAND(ONENAND_REG_INTERRUPT))
+
+#define ONENAND_PAGE_SIZE 2048
+
+extern int onenand_read_block(unsigned char *buf, ulong block);
+#endif
diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c
new file mode 100644
index 0000000..f81f4df
--- /dev/null
+++ b/onenand_ipl/onenand_read.c
@@ -0,0 +1,105 @@
+/*
+ * (C) Copyright 2005 Samsung Electronis
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/string.h>
+
+#include "onenand_ipl.h"
+
+#define onenand_block_address(block) (block)
+#define onenand_sector_address(page) (page << 2)
+#define onenand_buffer_address() ((1 << 3) << 8)
+#define onenand_bufferram_address(block) (0)
+
+/* read a page with ECC */
+static inline int onenand_read_page(ulong block, ulong page, u_char *buf)
+{
+ unsigned long *base;
+
+#ifndef __HAVE_ARCH_MEMCPY32
+ unsigned int offset, value;
+ unsigned long *p;
+#endif
+
+ onenand_writew(onenand_block_address(block),
+ THIS_ONENAND(ONENAND_REG_START_ADDRESS1));
+
+ onenand_writew(onenand_sector_address(page),
+ THIS_ONENAND(ONENAND_REG_START_ADDRESS8));
+
+ onenand_writew(onenand_buffer_address(),
+ THIS_ONENAND(ONENAND_REG_START_BUFFER));
+
+ onenand_writew(onenand_bufferram_address(block),
+ THIS_ONENAND(ONENAND_REG_START_ADDRESS2));
+
+ onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT));
+
+ onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND));
+
+#ifndef __HAVE_ARCH_MEMCPY32
+ p = (unsigned long *) buf;
+#endif
+ base = (unsigned long *) (CFG_ONENAND_BASE + ONENAND_DATARAM);
+
+ while (!(READ_INTERRUPT() & ONENAND_INT_READ))
+ continue;
+
+#ifdef __HAVE_ARCH_MEMCPY32
+ /* 32 bytes boundary memory copy */
+ memcpy32(buf, base, ONENAND_PAGE_SIZE);
+#else
+ for (offset = 0; offset < (ONENAND_PAGE_SIZE >> 2); offset++) {
+ value = *(base + offset);
+ *p++ = value;
+ }
+#endif
+
+ return 0;
+}
+
+#define ONENAND_START_PAGE 1
+#define ONENAND_PAGES_PER_BLOCK 64
+
+/**
+ * onenand_read_block - Read a block data to buf
+ * @return 0 on success
+ */
+int onenand_read_block(unsigned char *buf, ulong block)
+{
+ int page, offset = 0;
+
+ /* NOTE: you must read page from page 1 of block 0 */
+ /* read the block page by page*/
+ for (page = ONENAND_START_PAGE;
+ page < ONENAND_PAGES_PER_BLOCK; page++) {
+
+ onenand_read_page(block, page, buf + offset);
+
+ offset += ONENAND_PAGE_SIZE;
+ }
+
+ return 0;
+}
More information about the U-Boot
mailing list