From cb2da50f0f7b62f2ef806bdc61ec34d103542fbb Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Fri, 28 May 2010 12:08:10 +0800 Subject: nios2: use gc sections to reduce image size Follow the discussion of Charles Manning and Mike Frysinger. Using gc_sections helps reduce image size. Configuring for nios2-generic board... Before, text data bss dec hex filename 123979 3724 22892 150595 24c43 /tmp/u-boot/u-boot After, text data bss dec hex filename 115983 3800 22732 142515 22cb3 /tmp/u-boot/u-boot Signed-off-by: Thomas Chou Signed-off-by: Scott McNutt --- arch/nios2/config.mk | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/nios2/config.mk b/arch/nios2/config.mk index 793cc43..aba96b3 100644 --- a/arch/nios2/config.mk +++ b/arch/nios2/config.mk @@ -30,3 +30,6 @@ PLATFORM_CPPFLAGS += -DCONFIG_NIOS2 -D__NIOS2__ PLATFORM_CPPFLAGS += -G0 LDSCRIPT ?= $(SRCTREE)/$(CPUDIR)/u-boot.lds + +LDFLAGS += --gc-sections +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections -- cgit v1.1 From 06c5d30dc358a41efa3a27e1c7f602e7b3e8a6f5 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Mon, 31 May 2010 11:58:05 +0800 Subject: nios2: add fdt support This patch adds fdt support to boot linux, followed Michal's work on microblaze. Signed-off-by: Thomas Chou Signed-off-by: Scott McNutt --- arch/nios2/lib/bootm.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'arch') diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c index e4093a8..e25a113 100644 --- a/arch/nios2/lib/bootm.c +++ b/arch/nios2/lib/bootm.c @@ -34,6 +34,18 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima char *commandline = getenv("bootargs"); ulong initrd_start = images->rd_start; ulong initrd_end = images->rd_end; + char *of_flat_tree = NULL; +#if defined(CONFIG_OF_LIBFDT) + ulong of_size = 0; + + /* find flattened device tree */ + if (boot_get_fdt(flag, argc, argv, images, &of_flat_tree, &of_size)) + return 1; +#endif + if (!of_flat_tree) + of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16); + if (of_flat_tree) + initrd_end = (ulong)of_flat_tree; if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1; @@ -45,6 +57,15 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); + /* kernel parameters passing + * r4 : NIOS magic + * r5 : initrd start + * r6 : initrd end or fdt + * r7 : kernel command line + * fdt is passed to kernel via r6, the same as initrd_end. fdt will be + * verified with fdt magic. when both initrd and fdt are used at the + * same time, fdt must follow immediately after initrd. + */ kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); /* does not return */ -- cgit v1.1 From 6db6c18b5074f959882bb199c850359ded54778f Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Wed, 9 Jun 2010 09:51:09 +0800 Subject: nios2: add gpio_request This will be used by nand_plat. Signed-off-by: Thomas Chou Signed-off-by: Scott McNutt --- arch/nios2/include/asm/gpio.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch') diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h index 76c425e..cff1dd9 100644 --- a/arch/nios2/include/asm/gpio.h +++ b/arch/nios2/include/asm/gpio.h @@ -21,6 +21,11 @@ #ifdef CONFIG_SYS_GPIO_BASE #include +static inline int gpio_request(unsigned gpio, const char *label) +{ + return 0; +} + static inline int gpio_direction_input(unsigned gpio) { writel(1, CONFIG_SYS_GPIO_BASE + (gpio << 2)); @@ -43,6 +48,7 @@ static inline void gpio_set_value(unsigned gpio, int value) writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + (gpio << 2)); } #else +extern int gpio_request(unsigned gpio, const char *label); extern int gpio_direction_input(unsigned gpio); extern int gpio_direction_output(unsigned gpio, int value); extern int gpio_get_value(unsigned gpio); -- cgit v1.1