sunxi: non-FEL SPL boot support for sun7i

Add support for booting from an MMC card. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net> Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Reviewed-by: Marek Vasut <marex@denx.de> Cc: Tom Cubie <Mr.hipboi@gmail.com> Reviewed-by: Tom Rini <trini@ti.com>

sunxi: non-FEL SPL boot support for sun7i
Add support for booting from an MMC card. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Henrik Nordström <henrik@henriknordstrom.net> Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Reviewed-by: Marek Vasut <marex@denx.de> Cc: Tom Cubie <Mr.hipboi@gmail.com> Reviewed-by: Tom Rini <trini@ti.com>
Ian Campbell · Albert ARIBAUD
1 parent e24ea55c04
Showing 9 changed files with 255 additions and 0 deletions Side-by-side Diff
Makefile
arch/arm/cpu/armv7/sunxi/config.mk
arch/arm/cpu/armv7/sunxi/u-boot-spl.lds
boards.cfg
include/configs/sunxi-common.h
spl/Makefile
tools/.gitignore
tools/Makefile
tools/mksunxiboot.c
@@ -937,6 +937,13 @@
 u-boot-spi.gph: spl/u-boot-spl.gph u-boot.img FORCE
 	$(call if_changed,pad_cat)
  
+ifneq ($(CONFIG_SUNXI),)
+OBJCOPYFLAGS_u-boot-sunxi-with-spl.bin = -I binary -O binary \
+				   --pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff
+u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img FORCE
+	$(call if_changed,pad_cat)
+endif
+
 ifneq ($(CONFIG_TEGRA),)
 OBJCOPYFLAGS_u-boot-nodtb-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
 u-boot-nodtb-tegra.bin: spl/u-boot-spl u-boot.bin FORCE
@@ -1162,6 +1169,9 @@
 	@:
 spl/u-boot-spl: tools prepare
 	$(Q)$(MAKE) obj=spl -f $(srctree)/spl/Makefile all
+
+spl/sunxi-spl.bin: spl/u-boot-spl
+	@:
  
 tpl/u-boot-tpl.bin: tools prepare
 	$(Q)$(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
+# Build a combined spl + u-boot image
+ifdef CONFIG_SPL
+ifndef CONFIG_SPL_BUILD
+ifndef CONFIG_SPL_FEL
+ALL-y += u-boot-sunxi-with-spl.bin
+endif
+endif
+endif
+/*
+ * (C) Copyright 2012
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
+ *
+ * Based on omap-common/u-boot-spl.lds:
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *	Aneesh V <aneesh@ti.com>
+ *
+ * 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
+{
+	.text      :
+	{
+		__start = .;
+		arch/arm/cpu/armv7/start.o	(.text)
+		*(.text*)
+	} > .sram
+
+	. = ALIGN(4);
+	.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
+
+	. = ALIGN(4);
+	.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
+
+	. = ALIGN(4);
+	__image_copy_end = .;
+	_end = .;
+
+	.bss :
+	{
+		. = ALIGN(4);
+		__bss_start = .;
+		*(.bss*)
+		. = ALIGN(4);
+		__bss_end = .;
+	} > .sdram
+}
@@ -379,6 +379,7 @@
 Active  arm         armv7          s5pc1xx     samsung         goni                s5p_goni                              -                                                                                                                                 Przemyslaw Marczak <p.marczak@samsung.com>
 Active  arm         armv7          s5pc1xx     samsung         smdkc100            smdkc100                              -                                                                                                                                 Minkyu Kang <mk7.kang@samsung.com>
 Active  arm         armv7          socfpga     altera          socfpga             socfpga_cyclone5                      -                                                                                                                                 -
+Active  arm         armv7          sunxi       -               sunxi               Cubietruck                            sun7i:CUBIETRUCK,SPL,SUNXI_GMAC,RGMII                                                                                             -
 Active  arm         armv7          sunxi       -               sunxi               Cubietruck_FEL                        sun7i:CUBIETRUCK,SPL_FEL,SUNXI_GMAC,RGMII                                                                                         -
 Active  arm         armv7          u8500       st-ericsson     snowball            snowball                              -                                                                                                                                 Mathieu Poirier <mathieu.poirier@linaro.org>
 Active  arm         armv7          u8500       st-ericsson     u8500               u8500_href                            -                                                                                                                                 -
@@ -17,6 +17,11 @@
  * High Level Configuration Options
  */
 #define CONFIG_SUNXI		/* sunxi family */
+#ifdef CONFIG_SPL_BUILD
+#ifndef CONFIG_SPL_FEL
+#define CONFIG_SYS_THUMB_BUILD	/* Thumbs mode to save space in SPL */
+#endif
+#endif
  
 #include <asm/arch/cpu.h>	/* get chip and board defs */
  
  
@@ -121,11 +126,32 @@
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
  
+#ifdef CONFIG_SPL_FEL
+
 #define CONFIG_SPL
 #define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/sunxi/u-boot-spl-fel.lds"
 #define CONFIG_SPL_START_S_PATH "arch/arm/cpu/armv7/sunxi"
 #define CONFIG_SPL_TEXT_BASE		0x2000
 #define CONFIG_SPL_MAX_SIZE		0x4000		/* 16 KiB */
+
+#else /* CONFIG_SPL */
+
+#define CONFIG_SPL_BSS_START_ADDR	0x4ff80000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x80000		/* 512 KiB */
+
+#define CONFIG_SPL_TEXT_BASE		0x20		/* sram start+header */
+#define CONFIG_SPL_MAX_SIZE		0x5fe0		/* 24KB on sun4i/sun7i */
+
+#define CONFIG_SPL_LIBDISK_SUPPORT
+#define CONFIG_SPL_MMC_SUPPORT
+
+#define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/sunxi/u-boot-spl.lds"
+
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	80	/* 40KiB */
+#define CONFIG_SPL_PAD_TO		32768		/* decimal for 'dd' */
+
+#endif /* CONFIG_SPL */
+
 /* end of 32 KiB in sram */
 #define LOW_LEVEL_SRAM_STACK		0x00008000 /* End of sram */
 #define CONFIG_SPL_STACK		LOW_LEVEL_SRAM_STACK
@@ -189,6 +189,12 @@
 ALL-y	+= $(obj)/$(BOARD)-spl.bin
 endif
  
+ifdef CONFIG_SUNXI
+ifndef CONFIG_SPL_FEL
+ALL-y	+= $(obj)/sunxi-spl.bin
+endif
+endif
+
 all:	$(ALL-y)
  
 ifdef CONFIG_SAMSUNG
@@ -214,6 +220,13 @@
 LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)
 ifneq ($(CONFIG_SPL_TEXT_BASE),)
 LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
+endif
+
+ifdef CONFIG_SUNXI
+quiet_cmd_mksunxiboot = MKSUNXI $@
+cmd_mksunxiboot = $(objtree)/tools/mksunxiboot $< $@
+$(obj)/sunxi-spl.bin: $(obj)/$(SPL_BIN).bin
+	$(call if_changed,mksunxiboot)
 endif
  
 quiet_cmd_u-boot-spl = LD      $@
@@ -11,6 +11,7 @@
 /mkexynosspl
 /mpc86x_clk
 /mxsboot
+/mksunxiboot
 /ncb
 /proftool
 /relocate-rela
@@ -131,6 +131,8 @@
 hostprogs-$(CONFIG_MX28) += mxsboot$(SFX)
 HOSTCFLAGS_mxsboot$(SFX).o := -pedantic
  
+hostprogs-$(CONFIG_SUNXI) += mksunxiboot$(SFX)
+
 hostprogs-$(CONFIG_NETCONSOLE) += ncb$(SFX)
 hostprogs-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1$(SFX)
  
+/*
+ * (C) Copyright 2007-2011
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
+ *
+ * a simple tool to generate bootable image for sunxi platform.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/* boot head definition from sun4i boot code */
+struct boot_file_head {
+	uint32_t b_instruction;	/* one intruction jumping to real code */
+	uint8_t magic[8];	/* ="eGON.BT0" or "eGON.BT1", not C-style str */
+	uint32_t check_sum;	/* generated by PC */
+	uint32_t length;	/* generated by PC */
+	/*
+	 * We use a simplified header, only filling in what is needed
+	 * by the boot ROM. To be compatible with Allwinner tools we
+	 * would need to implement the proper fields here instead of
+	 * padding.
+	 */
+	uint8_t pad[12];		/* align to 32 bytes */
+};
+
+#define BOOT0_MAGIC                     "eGON.BT0"
+#define STAMP_VALUE                     0x5F0A6C39
+
+/* check sum functon from sun4i boot code */
+int gen_check_sum(struct boot_file_head *head_p)
+{
+	uint32_t length;
+	uint32_t *buf;
+	uint32_t loop;
+	uint32_t i;
+	uint32_t sum;
+
+	length = head_p->length;
+	if ((length & 0x3) != 0)	/* must 4-byte-aligned */
+		return -1;
+	buf = (uint32_t *)head_p;
+	head_p->check_sum = STAMP_VALUE;	/* fill stamp */
+	loop = length >> 2;
+
+	/* calculate the sum */
+	for (i = 0, sum = 0; i < loop; i++)
+		sum += buf[i];
+
+	/* write back check sum */
+	head_p->check_sum = sum;
+
+	return 0;
+}
+
+#define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1)
+#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
+
+#define SUN4I_SRAM_SIZE 0x7600	/* 0x7748+ is used by BROM */
+#define SRAM_LOAD_MAX_SIZE (SUN4I_SRAM_SIZE - sizeof(struct boot_file_head))
+#define BLOCK_SIZE 512
+
+struct boot_img {
+	struct boot_file_head header;
+	char code[SRAM_LOAD_MAX_SIZE];
+	char pad[BLOCK_SIZE];
+};
+
+int main(int argc, char *argv[])
+{
+	int fd_in, fd_out;
+	struct boot_img img;
+	unsigned file_size, load_size;
+	int count;
+
+	if (argc < 2) {
+		printf("\tThis program makes an input bin file to sun4i " \
+		       "bootable image.\n" \
+		       "\tUsage: %s input_file out_putfile\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	fd_in = open(argv[1], O_RDONLY);
+	if (fd_in < 0) {
+		perror("Open input file");
+		return EXIT_FAILURE;
+	}
+
+	memset(img.pad, 0, BLOCK_SIZE);
+
+	/* get input file size */
+	file_size = lseek(fd_in, 0, SEEK_END);
+
+	if (file_size > SRAM_LOAD_MAX_SIZE) {
+		fprintf(stderr, "ERROR: File too large!\n");
+		return EXIT_FAILURE;
+	} else {
+		load_size = ALIGN(file_size, sizeof(int));
+	}
+
+	fd_out = open(argv[2], O_WRONLY | O_CREAT, 0666);
+	if (fd_out < 0) {
+		perror("Open output file");
+		return EXIT_FAILURE;
+	}
+
+	/* read file to buffer to calculate checksum */
+	lseek(fd_in, 0, SEEK_SET);
+	count = read(fd_in, img.code, load_size);
+	if (count != load_size) {
+		perror("Reading input image");
+		return EXIT_FAILURE;
+	}
+
+	/* fill the header */
+	img.header.b_instruction =	/* b instruction */
+		0xEA000000 |	/* jump to the first instr after the header */
+		((sizeof(struct boot_file_head) / sizeof(int) - 2)
+		 & 0x00FFFFFF);
+	memcpy(img.header.magic, BOOT0_MAGIC, 8);	/* no '0' termination */
+	img.header.length =
+		ALIGN(load_size + sizeof(struct boot_file_head), BLOCK_SIZE);
+	gen_check_sum(&img.header);
+
+	count = write(fd_out, &img, img.header.length);
+	if (count != img.header.length) {
+		perror("Writing output");
+		return EXIT_FAILURE;
+	}
+
+	close(fd_in);
+	close(fd_out);
+
+	return EXIT_SUCCESS;
+}
...	...	@@ -937,6 +937,13 @@
937	937	u-boot-spi.gph: spl/u-boot-spl.gph u-boot.img FORCE
938	938	$(call if_changed,pad_cat)
939	939
	940	+ifneq ($(CONFIG_SUNXI),)
	941	+OBJCOPYFLAGS_u-boot-sunxi-with-spl.bin = -I binary -O binary \
	942	+ --pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff
	943	+u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img FORCE
	944	+ $(call if_changed,pad_cat)
	945	+endif
	946	+
940	947	ifneq ($(CONFIG_TEGRA),)
941	948	OBJCOPYFLAGS_u-boot-nodtb-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
942	949	u-boot-nodtb-tegra.bin: spl/u-boot-spl u-boot.bin FORCE
...	...	@@ -1162,6 +1169,9 @@
1162	1169	@:
1163	1170	spl/u-boot-spl: tools prepare
1164	1171	$(Q)$(MAKE) obj=spl -f $(srctree)/spl/Makefile all
	1172	+
	1173	+spl/sunxi-spl.bin: spl/u-boot-spl
	1174	+ @:
1165	1175
1166	1176	tpl/u-boot-tpl.bin: tools prepare
1167	1177	$(Q)$(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
	1	+# Build a combined spl + u-boot image
	2	+ifdef CONFIG_SPL
	3	+ifndef CONFIG_SPL_BUILD
	4	+ifndef CONFIG_SPL_FEL
	5	+ALL-y += u-boot-sunxi-with-spl.bin
	6	+endif
	7	+endif
	8	+endif
	1	+/*
	2	+ * (C) Copyright 2012
	3	+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
	4	+ * Tom Cubie <tangliang@allwinnertech.com>
	5	+ *
	6	+ * Based on omap-common/u-boot-spl.lds:
	7	+ *
	8	+ * (C) Copyright 2002
	9	+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
	10	+ *
	11	+ * (C) Copyright 2010
	12	+ * Texas Instruments, <www.ti.com>
	13	+ * Aneesh V <aneesh@ti.com>
	14	+ *
	15	+ * SPDX-License-Identifier: GPL-2.0+
	16	+ */
	17	+MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
	18	+ LENGTH = CONFIG_SPL_MAX_SIZE }
	19	+MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
	20	+ LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
	21	+
	22	+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
	23	+OUTPUT_ARCH(arm)
	24	+ENTRY(_start)
	25	+SECTIONS
	26	+{
	27	+ .text :
	28	+ {
	29	+ __start = .;
	30	+ arch/arm/cpu/armv7/start.o (.text)
	31	+ (.text)
	32	+ } > .sram
	33	+
	34	+ . = ALIGN(4);
	35	+ .rodata : { (SORT_BY_ALIGNMENT(.rodata)) } >.sram
	36	+
	37	+ . = ALIGN(4);
	38	+ .data : { (SORT_BY_ALIGNMENT(.data)) } >.sram
	39	+
	40	+ . = ALIGN(4);
	41	+ __image_copy_end = .;
	42	+ _end = .;
	43	+
	44	+ .bss :
	45	+ {
	46	+ . = ALIGN(4);
	47	+ __bss_start = .;
	48	+ (.bss)
	49	+ . = ALIGN(4);
	50	+ __bss_end = .;
	51	+ } > .sdram
	52	+}
...	...	@@ -379,6 +379,7 @@
379	379	Active arm armv7 s5pc1xx samsung goni s5p_goni - Przemyslaw Marczak <p.marczak@samsung.com>
380	380	Active arm armv7 s5pc1xx samsung smdkc100 smdkc100 - Minkyu Kang <mk7.kang@samsung.com>
381	381	Active arm armv7 socfpga altera socfpga socfpga_cyclone5 - -
	382	+Active arm armv7 sunxi - sunxi Cubietruck sun7i:CUBIETRUCK,SPL,SUNXI_GMAC,RGMII -
382	383	Active arm armv7 sunxi - sunxi Cubietruck_FEL sun7i:CUBIETRUCK,SPL_FEL,SUNXI_GMAC,RGMII -
383	384	Active arm armv7 u8500 st-ericsson snowball snowball - Mathieu Poirier <mathieu.poirier@linaro.org>
384	385	Active arm armv7 u8500 st-ericsson u8500 u8500_href - -
...	...	@@ -17,6 +17,11 @@
17	17	* High Level Configuration Options
18	18	*/
19	19	#define CONFIG_SUNXI /* sunxi family */
	20	+#ifdef CONFIG_SPL_BUILD
	21	+#ifndef CONFIG_SPL_FEL
	22	+#define CONFIG_SYS_THUMB_BUILD /* Thumbs mode to save space in SPL */
	23	+#endif
	24	+#endif
20	25
21	26	#include <asm/arch/cpu.h> /* get chip and board defs */
22	27
23	28
...	...	@@ -121,11 +126,32 @@
121	126	#define CONFIG_SPL_SERIAL_SUPPORT
122	127	#define CONFIG_SPL_LIBGENERIC_SUPPORT
123	128
	129	+#ifdef CONFIG_SPL_FEL
	130	+
124	131	#define CONFIG_SPL
125	132	#define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/sunxi/u-boot-spl-fel.lds"
126	133	#define CONFIG_SPL_START_S_PATH "arch/arm/cpu/armv7/sunxi"
127	134	#define CONFIG_SPL_TEXT_BASE 0x2000
128	135	#define CONFIG_SPL_MAX_SIZE 0x4000 /* 16 KiB */
	136	+
	137	+#else /* CONFIG_SPL */
	138	+
	139	+#define CONFIG_SPL_BSS_START_ADDR 0x4ff80000
	140	+#define CONFIG_SPL_BSS_MAX_SIZE 0x80000 /* 512 KiB */
	141	+
	142	+#define CONFIG_SPL_TEXT_BASE 0x20 /* sram start+header */
	143	+#define CONFIG_SPL_MAX_SIZE 0x5fe0 /* 24KB on sun4i/sun7i */
	144	+
	145	+#define CONFIG_SPL_LIBDISK_SUPPORT
	146	+#define CONFIG_SPL_MMC_SUPPORT
	147	+
	148	+#define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/sunxi/u-boot-spl.lds"
	149	+
	150	+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 80 /* 40KiB */
	151	+#define CONFIG_SPL_PAD_TO 32768 /* decimal for 'dd' */
	152	+
	153	+#endif /* CONFIG_SPL */
	154	+
129	155	/* end of 32 KiB in sram */
130	156	#define LOW_LEVEL_SRAM_STACK 0x00008000 /* End of sram */
131	157	#define CONFIG_SPL_STACK LOW_LEVEL_SRAM_STACK
...	...	@@ -189,6 +189,12 @@
189	189	ALL-y += $(obj)/$(BOARD)-spl.bin
190	190	endif
191	191
	192	+ifdef CONFIG_SUNXI
	193	+ifndef CONFIG_SPL_FEL
	194	+ALL-y += $(obj)/sunxi-spl.bin
	195	+endif
	196	+endif
	197	+
192	198	all: $(ALL-y)
193	199
194	200	ifdef CONFIG_SAMSUNG
...	...	@@ -214,6 +220,13 @@
214	220	LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)
215	221	ifneq ($(CONFIG_SPL_TEXT_BASE),)
216	222	LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
	223	+endif
	224	+
	225	+ifdef CONFIG_SUNXI
	226	+quiet_cmd_mksunxiboot = MKSUNXI $@
	227	+cmd_mksunxiboot = $(objtree)/tools/mksunxiboot $< $@
	228	+$(obj)/sunxi-spl.bin: $(obj)/$(SPL_BIN).bin
	229	+ $(call if_changed,mksunxiboot)
217	230	endif
218	231
219	232	quiet_cmd_u-boot-spl = LD $@
...	...	@@ -11,6 +11,7 @@
11	11	/mkexynosspl
12	12	/mpc86x_clk
13	13	/mxsboot
	14	+/mksunxiboot
14	15	/ncb
15	16	/proftool
16	17	/relocate-rela
...	...	@@ -131,6 +131,8 @@
131	131	hostprogs-$(CONFIG_MX28) += mxsboot$(SFX)
132	132	HOSTCFLAGS_mxsboot$(SFX).o := -pedantic
133	133
	134	+hostprogs-$(CONFIG_SUNXI) += mksunxiboot$(SFX)
	135	+
134	136	hostprogs-$(CONFIG_NETCONSOLE) += ncb$(SFX)
135	137	hostprogs-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1$(SFX)
136	138
	1	+/*
	2	+ * (C) Copyright 2007-2011
	3	+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
	4	+ * Tom Cubie <tangliang@allwinnertech.com>
	5	+ *
	6	+ * a simple tool to generate bootable image for sunxi platform.
	7	+ *
	8	+ * SPDX-License-Identifier: GPL-2.0+
	9	+ */
	10	+#include <fcntl.h>
	11	+#include <stdio.h>
	12	+#include <unistd.h>
	13	+#include <stdlib.h>
	14	+#include <string.h>
	15	+#include <errno.h>
	16	+#include <sys/types.h>
	17	+#include <sys/stat.h>
	18	+
	19	+/* boot head definition from sun4i boot code */
	20	+struct boot_file_head {
	21	+ uint32_t b_instruction; /* one intruction jumping to real code */
	22	+ uint8_t magic[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */
	23	+ uint32_t check_sum; /* generated by PC */
	24	+ uint32_t length; /* generated by PC */
	25	+ /*
	26	+ * We use a simplified header, only filling in what is needed
	27	+ * by the boot ROM. To be compatible with Allwinner tools we
	28	+ * would need to implement the proper fields here instead of
	29	+ * padding.
	30	+ */
	31	+ uint8_t pad[12]; /* align to 32 bytes */
	32	+};
	33	+
	34	+#define BOOT0_MAGIC "eGON.BT0"
	35	+#define STAMP_VALUE 0x5F0A6C39
	36	+
	37	+/* check sum functon from sun4i boot code */
	38	+int gen_check_sum(struct boot_file_head *head_p)
	39	+{
	40	+ uint32_t length;
	41	+ uint32_t *buf;
	42	+ uint32_t loop;
	43	+ uint32_t i;
	44	+ uint32_t sum;
	45	+
	46	+ length = head_p->length;
	47	+ if ((length & 0x3) != 0) /* must 4-byte-aligned */
	48	+ return -1;
	49	+ buf = (uint32_t *)head_p;
	50	+ head_p->check_sum = STAMP_VALUE; /* fill stamp */
	51	+ loop = length >> 2;
	52	+
	53	+ /* calculate the sum */
	54	+ for (i = 0, sum = 0; i < loop; i++)
	55	+ sum += buf[i];
	56	+
	57	+ /* write back check sum */
	58	+ head_p->check_sum = sum;
	59	+
	60	+ return 0;
	61	+}
	62	+
	63	+#define ALIGN(x, a) __ALIGN_MASK((x), (typeof(x))(a)-1)
	64	+#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
	65	+
	66	+#define SUN4I_SRAM_SIZE 0x7600 /* 0x7748+ is used by BROM */
	67	+#define SRAM_LOAD_MAX_SIZE (SUN4I_SRAM_SIZE - sizeof(struct boot_file_head))
	68	+#define BLOCK_SIZE 512
	69	+
	70	+struct boot_img {
	71	+ struct boot_file_head header;
	72	+ char code[SRAM_LOAD_MAX_SIZE];
	73	+ char pad[BLOCK_SIZE];
	74	+};
	75	+
	76	+int main(int argc, char *argv[])
	77	+{
	78	+ int fd_in, fd_out;
	79	+ struct boot_img img;
	80	+ unsigned file_size, load_size;
	81	+ int count;
	82	+
	83	+ if (argc < 2) {
	84	+ printf("\tThis program makes an input bin file to sun4i " \
	85	+ "bootable image.\n" \
	86	+ "\tUsage: %s input_file out_putfile\n", argv[0]);
	87	+ return EXIT_FAILURE;
	88	+ }
	89	+
	90	+ fd_in = open(argv[1], O_RDONLY);
	91	+ if (fd_in < 0) {
	92	+ perror("Open input file");
	93	+ return EXIT_FAILURE;
	94	+ }
	95	+
	96	+ memset(img.pad, 0, BLOCK_SIZE);
	97	+
	98	+ /* get input file size */
	99	+ file_size = lseek(fd_in, 0, SEEK_END);
	100	+
	101	+ if (file_size > SRAM_LOAD_MAX_SIZE) {
	102	+ fprintf(stderr, "ERROR: File too large!\n");
	103	+ return EXIT_FAILURE;
	104	+ } else {
	105	+ load_size = ALIGN(file_size, sizeof(int));
	106	+ }
	107	+
	108	+ fd_out = open(argv[2], O_WRONLY \| O_CREAT, 0666);
	109	+ if (fd_out < 0) {
	110	+ perror("Open output file");
	111	+ return EXIT_FAILURE;
	112	+ }
	113	+
	114	+ /* read file to buffer to calculate checksum */
	115	+ lseek(fd_in, 0, SEEK_SET);
	116	+ count = read(fd_in, img.code, load_size);
	117	+ if (count != load_size) {
	118	+ perror("Reading input image");
	119	+ return EXIT_FAILURE;
	120	+ }
	121	+
	122	+ /* fill the header */
	123	+ img.header.b_instruction = /* b instruction */
	124	+ 0xEA000000 \| /* jump to the first instr after the header */
	125	+ ((sizeof(struct boot_file_head) / sizeof(int) - 2)
	126	+ & 0x00FFFFFF);
	127	+ memcpy(img.header.magic, BOOT0_MAGIC, 8); /* no '0' termination */
	128	+ img.header.length =
	129	+ ALIGN(load_size + sizeof(struct boot_file_head), BLOCK_SIZE);
	130	+ gen_check_sum(&img.header);
	131	+
	132	+ count = write(fd_out, &img, img.header.length);
	133	+ if (count != img.header.length) {
	134	+ perror("Writing output");
	135	+ return EXIT_FAILURE;
	136	+ }
	137	+
	138	+ close(fd_in);
	139	+ close(fd_out);
	140	+
	141	+ return EXIT_SUCCESS;
	142	+}