May 2014 - U-Boot

[U-Boot] [PATCH] armv7:TI: Add <asm/ti-common/sys_proto.h> and migrate omap_hw_init_context
by Tom Rini 24 May '14

24 May '14

The omap_hw_init_context function (and assorted helpers) is the same for all OMAP-derived parts as when CHSETTINGS are used, that's the same and our DDR base is also always the same. In order to make this common we simply need to update the names of the define for DDR address space which is also common. Cc: Sricharan R. <r.sricharan(a)ti.com> Cc: Lokesh Vutla <lokeshvutla(a)ti.com> Signed-off-by: Tom Rini <trini(a)ti.com> --- arch/arm/cpu/armv7/omap-common/hwinit-common.c | 4 +- arch/arm/include/asm/arch-am33xx/sys_proto.h | 1 + arch/arm/include/asm/arch-omap4/sys_proto.h | 51 +---------------- arch/arm/include/asm/arch-omap5/omap.h | 5 -- arch/arm/include/asm/arch-omap5/sys_proto.h | 50 +--------------- arch/arm/include/asm/omap_common.h | 6 -- arch/arm/include/asm/ti-common/sys_proto.h | 72 ++++++++++++++++++++++++ 7 files changed, 77 insertions(+), 112 deletions(-) create mode 100644 arch/arm/include/asm/ti-common/sys_proto.h diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c index 8ebc0ce..132454c 100644 --- a/arch/arm/cpu/armv7/omap-common/hwinit-common.c +++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c @@ -194,8 +194,8 @@ u32 omap_sdram_size(void) addr = section & EMIF_SYS_ADDR_MASK; /* See if the address is valid */ - if ((addr >= DRAM_ADDR_SPACE_START) && - (addr < DRAM_ADDR_SPACE_END)) { + if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) && + (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) { size = ((section & EMIF_SYS_SIZE_MASK) >> EMIF_SYS_SIZE_SHIFT); size = 1 << size; diff --git a/arch/arm/include/asm/arch-am33xx/sys_proto.h b/arch/arm/include/asm/arch-am33xx/sys_proto.h index 91ff2ad..33a82fc 100644 --- a/arch/arm/include/asm/arch-am33xx/sys_proto.h +++ b/arch/arm/include/asm/arch-am33xx/sys_proto.h @@ -11,6 +11,7 @@ #ifndef _SYS_PROTO_H_ #define _SYS_PROTO_H_ #include <linux/mtd/omap_gpmc.h> +#include <asm/ti-common/sys_proto.h> #include <asm/arch/cpu.h> #define BOARD_REV_ID 0x0 diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h index 80172f3..83d858f 100644 --- a/arch/arm/include/asm/arch-omap4/sys_proto.h +++ b/arch/arm/include/asm/arch-omap4/sys_proto.h @@ -14,6 +14,7 @@ #include <asm/omap_common.h> #include <linux/mtd/omap_gpmc.h> #include <asm/arch/mux_omap4.h> +#include <asm/ti-common/sys_proto.h> DECLARE_GLOBAL_DATA_PTR; @@ -53,54 +54,4 @@ int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data); u32 warm_reset(void); void force_emif_self_refresh(void); void setup_warmreset_time(void); - -static inline u32 running_from_sdram(void) -{ - u32 pc; - asm volatile ("mov %0, pc" : "=r" (pc)); - return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) && - (pc < OMAP44XX_DRAM_ADDR_SPACE_END)); -} - -static inline u8 uboot_loaded_by_spl(void) -{ - /* - * u-boot can be running from sdram either because of configuration - * Header or by SPL. If because of CH, then the romcode sets the - * CHSETTINGS executed bit to true in the boot parameter structure that - * it passes to the bootloader.This parameter is stored in the ch_flags - * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a - * mandatory section if CH is present. - */ - if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) - return 0; - else - return running_from_sdram(); -} -/* - * The basic hardware init of OMAP(s_init()) can happen in 4 - * different contexts: - * 1. SPL running from SRAM - * 2. U-Boot running from FLASH - * 3. Non-XIP U-Boot loaded to SDRAM by SPL - * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the - * Configuration Header feature - * - * This function finds this context. - * Defining as inline may help in compiling out unused functions in SPL - */ -static inline u32 omap_hw_init_context(void) -{ -#ifdef CONFIG_SPL_BUILD - return OMAP_INIT_CONTEXT_SPL; -#else - if (uboot_loaded_by_spl()) - return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; - else if (running_from_sdram()) - return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; - else - return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; -#endif -} - #endif diff --git a/arch/arm/include/asm/arch-omap5/omap.h b/arch/arm/include/asm/arch-omap5/omap.h index 19fdece..54fc825 100644 --- a/arch/arm/include/asm/arch-omap5/omap.h +++ b/arch/arm/include/asm/arch-omap5/omap.h @@ -23,11 +23,6 @@ #define OMAP54XX_L4_WKUP_BASE 0x4Ae00000 #define OMAP54XX_L4_PER_BASE 0x48000000 -#define OMAP54XX_DRAM_ADDR_SPACE_START 0x80000000 -#define OMAP54XX_DRAM_ADDR_SPACE_END 0xFFFFFFFF -#define DRAM_ADDR_SPACE_START OMAP54XX_DRAM_ADDR_SPACE_START -#define DRAM_ADDR_SPACE_END OMAP54XX_DRAM_ADDR_SPACE_END - /* CONTROL ID CODE */ #define CONTROL_CORE_ID_CODE 0x4A002204 #define CONTROL_WKUP_ID_CODE 0x4AE0C204 diff --git a/arch/arm/include/asm/arch-omap5/sys_proto.h b/arch/arm/include/asm/arch-omap5/sys_proto.h index bf12c73..1038303 100644 --- a/arch/arm/include/asm/arch-omap5/sys_proto.h +++ b/arch/arm/include/asm/arch-omap5/sys_proto.h @@ -14,6 +14,7 @@ #include <asm/omap_common.h> #include <linux/mtd/omap_gpmc.h> #include <asm/arch/clock.h> +#include <asm/ti-common/sys_proto.h> DECLARE_GLOBAL_DATA_PTR; @@ -56,55 +57,6 @@ void get_ioregs(const struct ctrl_ioregs **regs); void srcomp_enable(void); void setup_warmreset_time(void); -static inline u32 running_from_sdram(void) -{ - u32 pc; - asm volatile ("mov %0, pc" : "=r" (pc)); - return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) && - (pc < OMAP54XX_DRAM_ADDR_SPACE_END)); -} - -static inline u8 uboot_loaded_by_spl(void) -{ - /* - * u-boot can be running from sdram either because of configuration - * Header or by SPL. If because of CH, then the romcode sets the - * CHSETTINGS executed bit to true in the boot parameter structure that - * it passes to the bootloader.This parameter is stored in the ch_flags - * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a - * mandatory section if CH is present. - */ - if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) - return 0; - else - return running_from_sdram(); -} -/* - * The basic hardware init of OMAP(s_init()) can happen in 4 - * different contexts: - * 1. SPL running from SRAM - * 2. U-Boot running from FLASH - * 3. Non-XIP U-Boot loaded to SDRAM by SPL - * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the - * Configuration Header feature - * - * This function finds this context. - * Defining as inline may help in compiling out unused functions in SPL - */ -static inline u32 omap_hw_init_context(void) -{ -#ifdef CONFIG_SPL_BUILD - return OMAP_INIT_CONTEXT_SPL; -#else - if (uboot_loaded_by_spl()) - return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; - else if (running_from_sdram()) - return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; - else - return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; -#endif -} - static inline u32 div_round_up(u32 num, u32 den) { return (num + den - 1)/den; diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h index 729723a..29278fe 100644 --- a/arch/arm/include/asm/omap_common.h +++ b/arch/arm/include/asm/omap_common.h @@ -576,12 +576,6 @@ s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb); void usb_fake_mac_from_die_id(u32 *id); -/* HW Init Context */ -#define OMAP_INIT_CONTEXT_SPL 0 -#define OMAP_INIT_CONTEXT_UBOOT_FROM_NOR 1 -#define OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL 2 -#define OMAP_INIT_CONTEXT_UBOOT_AFTER_CH 3 - /* ABB */ #define OMAP_ABB_NOMINAL_OPP 0 #define OMAP_ABB_FAST_OPP 1 diff --git a/arch/arm/include/asm/ti-common/sys_proto.h b/arch/arm/include/asm/ti-common/sys_proto.h new file mode 100644 index 0000000..d3ab75f --- /dev/null +++ b/arch/arm/include/asm/ti-common/sys_proto.h @@ -0,0 +1,72 @@ +/* + * (C) Copyright 2014 + * Texas Instruments, <www.ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _TI_COMMON_SYS_PROTO_H_ +#define _TI_COMMON_SYS_PROTO_H_ + +DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_OMAP_COMMON +#define TI_ARMV7_DRAM_ADDR_SPACE_START 0x80000000 +#define TI_ARMV7_DRAM_ADDR_SPACE_END 0xFFFFFFFF + +#define OMAP_INIT_CONTEXT_SPL 0 +#define OMAP_INIT_CONTEXT_UBOOT_FROM_NOR 1 +#define OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL 2 +#define OMAP_INIT_CONTEXT_UBOOT_AFTER_CH 3 + +static inline u32 running_from_sdram(void) +{ + u32 pc; + asm volatile ("mov %0, pc" : "=r" (pc)); + return ((pc >= TI_ARMV7_DRAM_ADDR_SPACE_START) && + (pc < TI_ARMV7_DRAM_ADDR_SPACE_END)); +} + +static inline u8 uboot_loaded_by_spl(void) +{ + /* + * u-boot can be running from sdram either because of configuration + * Header or by SPL. If because of CH, then the romcode sets the + * CHSETTINGS executed bit to true in the boot parameter structure that + * it passes to the bootloader.This parameter is stored in the ch_flags + * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a + * mandatory section if CH is present. + */ + if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) + return 0; + else + return running_from_sdram(); +} + +/* + * The basic hardware init of OMAP(s_init()) can happen in 4 + * different contexts: + * 1. SPL running from SRAM + * 2. U-Boot running from FLASH + * 3. Non-XIP U-Boot loaded to SDRAM by SPL + * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the + * Configuration Header feature + * + * This function finds this context. + * Defining as inline may help in compiling out unused functions in SPL + */ +static inline u32 omap_hw_init_context(void) +{ +#ifdef CONFIG_SPL_BUILD + return OMAP_INIT_CONTEXT_SPL; +#else + if (uboot_loaded_by_spl()) + return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; + else if (running_from_sdram()) + return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; + else + return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; +#endif +} +#endif + +#endif -- 1.7.9.5

2 2

[U-Boot] [U-Boot PATCH 0/5] ARM: DRA72x: Add support for DRA72x SoC
by Lokesh Vutla 24 May '14

24 May '14

DRA72x devices are single core Cortex A15 devices belonging to the DRA7xx family. This series adds support for DRA72x family Socs and the data for DRA722 ES1.0 soc. Tested on: DRA722 ES1.0 Verfied MAKEALL -s omap Keerthy (1): ARM: DRA72x: volt: Update the pmic offsets Lokesh Vutla (4): ARM: DRA72x: Add Silicon ID support ARM: DRA72x: clocks: Update the hwdata ARM: DRA72x: Update EMIF data ARM: DRA7xx: ctrl: Fix efuse register addresses arch/arm/cpu/armv7/omap-common/emif-common.c | 6 ++-- arch/arm/cpu/armv7/omap5/hw_data.c | 40 ++++++++++++++++++++++++++ arch/arm/cpu/armv7/omap5/hwinit.c | 3 ++ arch/arm/cpu/armv7/omap5/prcm-regs.c | 8 +++--- arch/arm/cpu/armv7/omap5/sdram.c | 19 +++++++++++- arch/arm/include/asm/arch-omap5/omap.h | 1 + arch/arm/include/asm/omap_common.h | 1 + 7 files changed, 71 insertions(+), 7 deletions(-) -- 1.7.9.5

3 11

[U-Boot] [PATCH] arm, am33xx: Enable CONFIG_SYS_GENERIC_BOARD for siemens boards
by Heiko Schocher 24 May '14

24 May '14

Signed-off-by: Heiko Schocher <hs(a)denx.de> Cc: Tom Rini <trini(a)ti.com> Cc: Samuel Egli <samuel.egli(a)siemens.com> Cc: Roger Meier <r.meier(a)siemens.com> --- include/configs/siemens-am33x-common.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/configs/siemens-am33x-common.h b/include/configs/siemens-am33x-common.h index 721c4e6..48c1566 100644 --- a/include/configs/siemens-am33x-common.h +++ b/include/configs/siemens-am33x-common.h @@ -46,6 +46,8 @@ #define CONFIG_CMD_ECHO #define CONFIG_CMD_CACHE +#define CONFIG_SYS_GENERIC_BOARD + #define CONFIG_ENV_VARS_UBOOT_CONFIG #ifndef CONFIG_SPL_BUILD #define CONFIG_ROOTPATH "/opt/eldk" -- 1.8.3.1

3 2

[U-Boot] [PATCH] ARM: OMAP: Fix omap_sdram_size calculation
by Lokesh Vutla 24 May '14

24 May '14

Last section of DMM is used for trapping tiler unmapped sections. Corresponding trap_size should be deducted from total SDRAM size only if trap section is overlapping with available SDRAM based on DMM sections. Fixing the same. Signed-off-by: Lokesh Vutla <lokeshvutla(a)ti.com> --- arch/arm/cpu/armv7/omap-common/hwinit-common.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c index 8ebc0ce..1a8acc8 100644 --- a/arch/arm/cpu/armv7/omap-common/hwinit-common.c +++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c @@ -185,7 +185,7 @@ u32 omap_sdram_size(void) { u32 section, i, valid; u64 sdram_start = 0, sdram_end = 0, addr, - size, total_size = 0, trap_size = 0; + size, total_size = 0, trap_size = 0, trap_start = 0; for (i = 0; i < 4; i++) { section = __raw_readl(DMM_BASE + i*4); @@ -208,12 +208,15 @@ u32 omap_sdram_size(void) sdram_end = addr + size; } else { trap_size = size; + trap_start = addr; } - } - } - total_size = (sdram_end - sdram_start) - (trap_size); + + if ((trap_start >= sdram_start) && (trap_start < sdram_end)) + total_size = (sdram_end - sdram_start) - (trap_size); + else + total_size = sdram_end - sdram_start; return total_size; } -- 1.7.9.5

2 1

[U-Boot] [PATCH 4/4] Exynos5420: DMC: Add software read leveling
by Akshay Saraswat 24 May '14

24 May '14

Sometimes Read DQ and DQS are not in phase. Since, this phase shift differs from board to board, we need to calibrate it at DRAM init phase, that's read DQ calibration. This patch adds SW Read DQ calibration routine to compensate this skew. Signed-off-by: Alim Akhtar <alim.akhtar(a)samsung.com> Signed-off-by: Akshay Saraswat <akshay.s(a)samsung.com> --- arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 244 +++++++++++++++++++++++++++++- arch/arm/cpu/armv7/exynos/exynos5_setup.h | 5 +- arch/arm/include/asm/arch-exynos/dmc.h | 3 + arch/arm/include/asm/arch-exynos/power.h | 4 +- 4 files changed, 252 insertions(+), 4 deletions(-) diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c index 0654c6a..a4f6099 100644 --- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c +++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c @@ -6,6 +6,7 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include <common.h> #include <config.h> #include <asm/io.h> #include <asm/arch/clock.h> @@ -16,7 +17,12 @@ #include "exynos5_setup.h" #include "clock_init.h" -#define TIMEOUT 10000 +#define TIMEOUT 10000 +#define NUM_BYTE_LANES 4 +#define DEFAULT_DQS 8 +#define DEFAULT_DQS_X4 0x08080808 +#define FALSE 0 +#define TRUE 1 #ifdef CONFIG_EXYNOS5250 static void reset_phy_ctrl(void) @@ -222,6 +228,219 @@ int ddr3_mem_ctrl_init(int reset) #endif #ifdef CONFIG_EXYNOS5420 +/* + * RAM address to use in the test. + * + * We'll use 4 words at this address and 4 at this address + 0x80 (Ares + * interleaves channels every 128 bytes). This will allow us to evaluate all of + * the chips in a 1 chip per channel (2GB) system and half the chips in a 2 + * chip per channel (4GB) system. We can't test the 2nd chip since we need to + * do tests before the 2nd chip is enabled. Looking at the 2nd chip isn't + * critical because the 1st and 2nd chip have very similar timings (they'd + * better have similar timings, since there's only a single adjustment that is + * shared by both chips). + */ +const unsigned int test_addr = 0x20000000; + +/* Test pattern with which RAM will be tested */ +static const unsigned int test_pattern[] = { + 0x5A5A5A5A, + 0xA5A5A5A5, + 0xF0F0F0F0, + 0x0F0F0F0F, +}; + +/* + * This function is a test vector for sw read leveling, + * it compares the read data with the written data. + * + * @param ch DMC channel number + * @param byte_lane which DQS byte offset, + * possible values are 0,1,2,3 + * @returns TRUE if memory was good, FALSE if not. + */ +static int dmc_valid_window_test_vector(int ch, int byte_lane) +{ + unsigned int read_data; + unsigned int mask; + int i; + + mask = 0xFF << (8 * byte_lane); + + for (i = 0; i < ARRAY_SIZE(test_pattern); i++) { + read_data = readl(test_addr + i*4 + ch*0x80); + if ((read_data & mask) != (test_pattern[i] & mask)) + return FALSE; + } + + return TRUE; +} + +/* + * This function returns current read offset value. + * + * @param phy_ctrl pointer to the current phy controller + */ +static unsigned int dmc_get_read_offset_value(struct exynos5420_phy_control + *phy_ctrl) +{ + return readl(&phy_ctrl->phy_con4); +} + +/* + * This function performs resync, so that slave DLL is updated. + * + * @param phy_ctrl pointer to the current phy controller + */ +static void ddr_phy_set_do_resync(struct exynos5420_phy_control *phy_ctrl) +{ + setbits_le32(&phy_ctrl->phy_con10, PHY_CON10_CTRL_OFFSETR3); + clrbits_le32(&phy_ctrl->phy_con10, PHY_CON10_CTRL_OFFSETR3); +} + +/* + * This function sets read offset value register with 'offset'. + * + * ...we also call call ddr_phy_set_do_resync(). + * + * @param phy_ctrl pointer to the current phy controller + * @param offset offset to read DQS + */ +static void dmc_set_read_offset_value(struct exynos5420_phy_control *phy_ctrl, + unsigned int offset) +{ + writel(offset, &phy_ctrl->phy_con4); + ddr_phy_set_do_resync(phy_ctrl); +} + +/* + * Convert a 2s complement byte to a byte with a sign bit. + * + * NOTE: you shouldn't use normal math on the number returned by this function. + * As an example, -10 = 0xf6. After this function -10 = 0x8a. If you wanted + * to do math and get the average of 10 and -10 (should be 0): + * 0x8a + 0xa = 0x94 (-108) + * 0x94 / 2 = 0xca (-54) + * ...and 0xca = sign bit plus 0x4a, or -74 + * + * Also note that you lose the ability to represent -128 since there are two + * representations of 0. + * + * @param b The byte to convert in two's complement. + * @returns The 7-bit value + sign bit. + */ + +unsigned char make_signed_byte(signed char b) +{ + if (b < 0) + return 0x80 | -b; + else + return b; +} + +/* + * Test various shifts starting at 'start' and going to 'end'. + * + * For each byte lane, we'll walk through shift starting at 'start' and going + * to 'end' (inclusive). When we are finally able to read the test pattern + * we'll store the value in the results array. + * + * @param phy_ctrl pointer to the current phy controller + * @param ch channel number + * @param start the start shift. -127 to 127 + * @param end the end shift. -127 to 127 + * @param results we'll store results for each byte lane. + */ + +void test_shifts(struct exynos5420_phy_control *phy_ctrl, int ch, + int start, int end, int results[NUM_BYTE_LANES]) +{ + int incr = (start < end) ? 1 : -1; + int byte_lane; + + for (byte_lane = 0; byte_lane < NUM_BYTE_LANES; byte_lane++) { + int shift; + + dmc_set_read_offset_value(phy_ctrl, DEFAULT_DQS_X4); + results[byte_lane] = DEFAULT_DQS; + + for (shift = start; shift != (end + incr); shift += incr) { + unsigned int byte_offsetr; + unsigned int offsetr; + + byte_offsetr = make_signed_byte(shift); + + offsetr = dmc_get_read_offset_value(phy_ctrl); + offsetr &= ~(0xFF << (8 * byte_lane)); + offsetr |= (byte_offsetr << (8 * byte_lane)); + dmc_set_read_offset_value(phy_ctrl, offsetr); + + if (dmc_valid_window_test_vector(ch, byte_lane)) { + results[byte_lane] = shift; + break; + } + } + } +} + +/* + * This function performs SW read leveling to compensate DQ-DQS skew at + * receiver it first finds the optimal read offset value on each DQS + * then applies the value to PHY. + * + * Read offset value has its min margin and max margin. If read offset + * value exceeds its min or max margin, read data will have corruption. + * To avoid this we are doing sw read leveling. + * + * SW read leveling is: + * 1> Finding offset value's left_limit and right_limit + * 2> and calculate its center value + * 3> finally programs that center value to PHY + * 4> then PHY gets its optimal offset value. + * + * @param phy_ctrl pointer to the current phy controller + * @param ch channel number + * @param coarse_lock_val The coarse lock value read from PHY_CON13. + * (0 - 0x7f) + */ +static void software_find_read_offset(struct exynos5420_phy_control *phy_ctrl, + int ch, unsigned int coarse_lock_val) +{ + unsigned int offsetr_cent; + int byte_lane; + int left_limit; + int right_limit; + int left[NUM_BYTE_LANES]; + int right[NUM_BYTE_LANES]; + int i; + + /* Fill the memory with test patterns */ + for (i = 0; i < ARRAY_SIZE(test_pattern); i++) + writel(test_pattern[i], test_addr + i*4 + ch*0x80); + + /* Figure out the limits we'll test with; keep -127 < limit < 127 */ + left_limit = DEFAULT_DQS - coarse_lock_val; + right_limit = DEFAULT_DQS + coarse_lock_val; + if (right_limit > 127) + right_limit = 127; + + /* Fill in the location where reads were OK from left and right */ + test_shifts(phy_ctrl, ch, left_limit, right_limit, left); + test_shifts(phy_ctrl, ch, right_limit, left_limit, right); + + /* Make a final value by taking the center between the left and right */ + offsetr_cent = 0; + for (byte_lane = 0; byte_lane < NUM_BYTE_LANES; byte_lane++) { + int temp_center; + unsigned int vmwc; + + temp_center = (left[byte_lane] + right[byte_lane]) / 2; + vmwc = make_signed_byte(temp_center); + offsetr_cent |= vmwc << (8 * byte_lane); + } + dmc_set_read_offset_value(phy_ctrl, offsetr_cent); +} + int ddr3_mem_ctrl_init(int reset) { struct exynos5420_clock *clk = @@ -231,6 +450,7 @@ int ddr3_mem_ctrl_init(int reset) struct exynos5420_phy_control *phy0_ctrl, *phy1_ctrl; struct exynos5420_dmc *drex0, *drex1; struct exynos5420_tzasc *tzasc0, *tzasc1; + struct exynos5_power *pmu; struct mem_timings *mem; uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1; uint32_t lock0_info, lock1_info; @@ -247,6 +467,7 @@ int ddr3_mem_ctrl_init(int reset) tzasc1 = (struct exynos5420_tzasc *)(samsung_get_base_dmc_tzasc() + DMC_OFFSET); mem = clock_get_mem_timings(); + pmu = (struct exynos5_power *)EXYNOS5420_POWER_BASE; /* Enable PAUSE for DREX */ setbits_le32(&clk->pause, ENABLE_BIT); @@ -566,6 +787,27 @@ int ddr3_mem_ctrl_init(int reset) setbits_le32(&phy1_ctrl->phy_con2, DLL_DESKEW_EN); } + /* + * Do software read leveling + * + * Do this before we turn on auto refresh since the auto refresh can + * be in conflict with the resync operation that's part of setting + * read leveling. + */ + if (!reset) { + /* restore calibrated value after resume */ + dmc_set_read_offset_value(phy0_ctrl, readl(&pmu->pmu_spare1)); + dmc_set_read_offset_value(phy1_ctrl, readl(&pmu->pmu_spare2)); + } else { + software_find_read_offset(phy0_ctrl, 0, + CTRL_LOCK_COARSE(lock0_info)); + software_find_read_offset(phy1_ctrl, 1, + CTRL_LOCK_COARSE(lock1_info)); + /* save calibrated value to restore after resume */ + writel(dmc_get_read_offset_value(phy0_ctrl), &pmu->pmu_spare1); + writel(dmc_get_read_offset_value(phy1_ctrl), &pmu->pmu_spare2); + } + /* Send PALL command */ dmc_config_prech(mem, &drex0->directcmd); dmc_config_prech(mem, &drex1->directcmd); diff --git a/arch/arm/cpu/armv7/exynos/exynos5_setup.h b/arch/arm/cpu/armv7/exynos/exynos5_setup.h index 1cf9caf..f4ee2a2 100644 --- a/arch/arm/cpu/armv7/exynos/exynos5_setup.h +++ b/arch/arm/cpu/armv7/exynos/exynos5_setup.h @@ -282,8 +282,11 @@ #define PHY_CON12_VAL 0x10107F50 #define CTRL_START (1 << 6) #define CTRL_DLL_ON (1 << 5) +#define CTRL_LOCK_COARSE_OFFSET (10) +#define CTRL_LOCK_COARSE_MASK (0x7F << CTRL_LOCK_COARSE_OFFSET) +#define CTRL_LOCK_COARSE(x) (((x) & CTRL_LOCK_COARSE_MASK) >> \ + CTRL_LOCK_COARSE_OFFSET) #define CTRL_FORCE_MASK (0x7F << 8) -#define CTRL_LOCK_COARSE_MASK (0x7F << 10) #define CTRL_FINE_LOCKED 0x7 #define CTRL_OFFSETD_RESET_VAL 0x8 diff --git a/arch/arm/include/asm/arch-exynos/dmc.h b/arch/arm/include/asm/arch-exynos/dmc.h index d78536d..ec3f9b6 100644 --- a/arch/arm/include/asm/arch-exynos/dmc.h +++ b/arch/arm/include/asm/arch-exynos/dmc.h @@ -467,6 +467,9 @@ enum mem_manuf { /* PHY_CON1 register fields */ #define PHY_CON1_RDLVL_RDDATA_ADJ_SHIFT 0 +/* PHY_CON4 rgister fields */ +#define PHY_CON10_CTRL_OFFSETR3 (1 << 24) + /* PHY_CON12 register fields */ #define PHY_CON12_CTRL_START_POINT_SHIFT 24 #define PHY_CON12_CTRL_INC_SHIFT 16 diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h index c9609a2..bcef43f 100644 --- a/arch/arm/include/asm/arch-exynos/power.h +++ b/arch/arm/include/asm/arch-exynos/power.h @@ -906,8 +906,8 @@ struct exynos5420_power { unsigned int sysip_dat3; unsigned char res11[0xe0]; unsigned int pmu_spare0; - unsigned int pmu_spare1; - unsigned int pmu_spare2; + unsigned int pmu_spare1; /* Store PHY0_CON4 for read leveling */ + unsigned int pmu_spare2; /* Store PHY1_CON4 for read leveling */ unsigned int pmu_spare3; unsigned char res12[0x4]; unsigned int cg_status0; -- 1.8.3.2

2 1

[U-Boot] [PATCH 3/4] DMC: exynos5420: Gate CLKM to when reading PHY_CON13
by Akshay Saraswat 24 May '14

24 May '14

From: Doug Anderson <dianders(a)chromium.org> >From experiments it appears that PHY_CON13 is glitchy if we sample it when CLKM is running. If we stop CLKM when sampling it the glitches all go away, so we'll do that. We also check the "is it locked" bits of PHY_CON13 and loop until they show that the value sampled actually represents a locked value. It doesn't appear that the glitching and "is it locked" are related, but it seems wise to wait until the PHY tells us the value is good before we use it. In practice we will not loop more than a couple times (and usually won't loop at all). Signed-off-by: Doug Anderson <dianders(a)chromium.org> Signed-off-by: Akshay Saraswat <akshay.s(a)samsung.com> --- arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 43 +++++++++++++++++++++++++++---- arch/arm/cpu/armv7/exynos/exynos5_setup.h | 1 + 2 files changed, 39 insertions(+), 5 deletions(-) diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c index 0822323..0654c6a 100644 --- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c +++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c @@ -233,6 +233,7 @@ int ddr3_mem_ctrl_init(int reset) struct exynos5420_tzasc *tzasc0, *tzasc1; struct mem_timings *mem; uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1; + uint32_t lock0_info, lock1_info; int chip; int i; @@ -396,7 +397,41 @@ int ddr3_mem_ctrl_init(int reset) */ dmc_config_mrs(mem, &drex0->directcmd); dmc_config_mrs(mem, &drex1->directcmd); - } else { + } + + /* + * Get PHY_CON13 from both phys. Gate CLKM around reading since + * PHY_CON13 is glitchy when CLKM is running. We're paranoid and + * wait until we get a "fine lock", though a coarse lock is probably + * OK (we only use the coarse numbers below). We try to gate the + * clock for as short a time as possible in case SDRAM is somehow + * sensitive. sdelay(10) in the loop is arbitrary to make sure + * there is some time for PHY_CON13 to get updated. In practice + * no delay appears to be needed. + */ + val = readl(&clk->gate_bus_cdrex); + while (true) { + writel(val & ~0x1, &clk->gate_bus_cdrex); + lock0_info = readl(&phy0_ctrl->phy_con13); + writel(val, &clk->gate_bus_cdrex); + + if ((lock0_info & CTRL_FINE_LOCKED) == CTRL_FINE_LOCKED) + break; + + sdelay(10); + } + while (true) { + writel(val & ~0x2, &clk->gate_bus_cdrex); + lock1_info = readl(&phy1_ctrl->phy_con13); + writel(val, &clk->gate_bus_cdrex); + + if ((lock1_info & CTRL_FINE_LOCKED) == CTRL_FINE_LOCKED) + break; + + sdelay(10); + } + + if (!reset) { /* * During Suspend-Resume & S/W-Reset, as soon as PMU releases * pad retention, CKE goes high. This causes memory contents @@ -447,15 +482,13 @@ int ddr3_mem_ctrl_init(int reset) val |= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET); writel(val, &phy1_ctrl->phy_con1); - n_lock_r = readl(&phy0_ctrl->phy_con13); - n_lock_w_phy0 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2; + n_lock_w_phy0 = (lock0_info & CTRL_LOCK_COARSE_MASK) >> 2; n_lock_r = readl(&phy0_ctrl->phy_con12); n_lock_r &= ~CTRL_DLL_ON; n_lock_r |= n_lock_w_phy0; writel(n_lock_r, &phy0_ctrl->phy_con12); - n_lock_r = readl(&phy1_ctrl->phy_con13); - n_lock_w_phy1 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2; + n_lock_w_phy1 = (lock1_info & CTRL_LOCK_COARSE_MASK) >> 2; n_lock_r = readl(&phy1_ctrl->phy_con12); n_lock_r &= ~CTRL_DLL_ON; n_lock_r |= n_lock_w_phy1; diff --git a/arch/arm/cpu/armv7/exynos/exynos5_setup.h b/arch/arm/cpu/armv7/exynos/exynos5_setup.h index b50af2f..1cf9caf 100644 --- a/arch/arm/cpu/armv7/exynos/exynos5_setup.h +++ b/arch/arm/cpu/armv7/exynos/exynos5_setup.h @@ -284,6 +284,7 @@ #define CTRL_DLL_ON (1 << 5) #define CTRL_FORCE_MASK (0x7F << 8) #define CTRL_LOCK_COARSE_MASK (0x7F << 10) +#define CTRL_FINE_LOCKED 0x7 #define CTRL_OFFSETD_RESET_VAL 0x8 #define CTRL_OFFSETD_VAL 0x7F -- 1.8.3.2

2 1

[U-Boot] [PATCH 2/4] Exynos5420: Remove code for enabling read leveling
by Akshay Saraswat 24 May '14

24 May '14

This patch intends to remove all code which enables hardware read leveling. All characterization environments may not cope up with h/w read leveling enabled, hence, we need to disable this. Also, disabling h/w read leveling improves the MIF LVcc value (LVcc value is the value at which DDR will fail to work properly). Improving LVcc means we have enough voltage margin for MIF. When h/w leveling is enabled, we have almost zero volatge margin. Signed-off-by: Alim Akhtar <alim.akhtar(a)samsung.com> Signed-off-by: Akshay Saraswat <akshay.s(a)samsung.com> --- arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 71 ------------------------------- 1 file changed, 71 deletions(-) diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c index a89930b..0822323 100644 --- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c +++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c @@ -524,77 +524,6 @@ int ddr3_mem_ctrl_init(int reset) &drex1->directcmd); } - if (mem->read_leveling_enable) { - /* Set Read DQ Calibration */ - val = (0x3 << DIRECT_CMD_BANK_SHIFT) | 0x4; - for (chip = 0; chip < mem->chips_to_configure; chip++) { - writel(val | (chip << DIRECT_CMD_CHIP_SHIFT), - &drex0->directcmd); - writel(val | (chip << DIRECT_CMD_CHIP_SHIFT), - &drex1->directcmd); - } - - val = readl(&phy0_ctrl->phy_con1); - val |= READ_LEVELLING_DDR3; - writel(val, &phy0_ctrl->phy_con1); - val = readl(&phy1_ctrl->phy_con1); - val |= READ_LEVELLING_DDR3; - writel(val, &phy1_ctrl->phy_con1); - - val = readl(&phy0_ctrl->phy_con2); - val |= (RDLVL_EN | RDLVL_INCR_ADJ); - writel(val, &phy0_ctrl->phy_con2); - val = readl(&phy1_ctrl->phy_con2); - val |= (RDLVL_EN | RDLVL_INCR_ADJ); - writel(val, &phy1_ctrl->phy_con2); - - setbits_le32(&drex0->rdlvl_config, - CTRL_RDLVL_DATA_ENABLE); - i = TIMEOUT; - while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO) - != RDLVL_COMPLETE_CHO) && (i > 0)) { - /* - * TODO(waihong): Comment on how long this take - * to timeout - */ - sdelay(100); - i--; - } - if (!i) - return SETUP_ERR_RDLV_COMPLETE_TIMEOUT; - - clrbits_le32(&drex0->rdlvl_config, - CTRL_RDLVL_DATA_ENABLE); - setbits_le32(&drex1->rdlvl_config, - CTRL_RDLVL_DATA_ENABLE); - i = TIMEOUT; - while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO) - != RDLVL_COMPLETE_CHO) && (i > 0)) { - /* - * TODO(waihong): Comment on how long this take - * to timeout - */ - sdelay(100); - i--; - } - if (!i) - return SETUP_ERR_RDLV_COMPLETE_TIMEOUT; - - clrbits_le32(&drex1->rdlvl_config, - CTRL_RDLVL_DATA_ENABLE); - - val = (0x3 << DIRECT_CMD_BANK_SHIFT); - for (chip = 0; chip < mem->chips_to_configure; chip++) { - writel(val | (chip << DIRECT_CMD_CHIP_SHIFT), - &drex0->directcmd); - writel(val | (chip << DIRECT_CMD_CHIP_SHIFT), - &drex1->directcmd); - } - - update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3); - update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3); - } - /* Common Settings for Leveling */ val = PHY_CON12_RESET_VAL; writel((val + n_lock_w_phy0), &phy0_ctrl->phy_con12); -- 1.8.3.2

2 1

[U-Boot] [PATCH 1/4] Exynos5: DMC: Modify the definition of ddr3_mem_ctrl_init
by Akshay Saraswat 24 May '14

24 May '14

Passing fewer arguments is better and mem_iv_size is never used. Let's keep only one argument and make it cleaner. Signed-off-by: Hatim Ali <hatim.rv(a)samsung.com> Signed-off-by: Akshay Saraswat <akshay.s(a)samsung.com> --- arch/arm/cpu/armv7/exynos/dmc_common.c | 5 +---- arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 10 ++++++---- arch/arm/cpu/armv7/exynos/exynos5_setup.h | 8 +------- 3 files changed, 8 insertions(+), 15 deletions(-) diff --git a/arch/arm/cpu/armv7/exynos/dmc_common.c b/arch/arm/cpu/armv7/exynos/dmc_common.c index cca925e..acc9e25 100644 --- a/arch/arm/cpu/armv7/exynos/dmc_common.c +++ b/arch/arm/cpu/armv7/exynos/dmc_common.c @@ -155,14 +155,11 @@ void dmc_config_prech(struct mem_timings *mem, uint32_t *directcmd) void mem_ctrl_init(int reset) { struct spl_machine_param *param = spl_get_machine_params(); - struct mem_timings *mem; int ret; - mem = clock_get_mem_timings(); - /* If there are any other memory variant, add their init call below */ if (param->mem_type == DDR_MODE_DDR3) { - ret = ddr3_mem_ctrl_init(mem, param->mem_iv_size, reset); + ret = ddr3_mem_ctrl_init(reset); if (ret) { /* will hang if failed to init memory control */ while (1) diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c index 487e6f4..a89930b 100644 --- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c +++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c @@ -28,18 +28,19 @@ static void reset_phy_ctrl(void) writel(DDR3PHY_CTRL_PHY_RESET, &clk->lpddr3phy_ctrl); } -int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, - int reset) +int ddr3_mem_ctrl_init(int reset) { unsigned int val; struct exynos5_phy_control *phy0_ctrl, *phy1_ctrl; struct exynos5_dmc *dmc; + struct mem_timings *mem; int i; phy0_ctrl = (struct exynos5_phy_control *)samsung_get_base_dmc_phy(); phy1_ctrl = (struct exynos5_phy_control *)(samsung_get_base_dmc_phy() + DMC_OFFSET); dmc = (struct exynos5_dmc *)samsung_get_base_dmc_ctrl(); + mem = clock_get_mem_timings(); if (reset) reset_phy_ctrl(); @@ -221,8 +222,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, #endif #ifdef CONFIG_EXYNOS5420 -int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, - int reset) +int ddr3_mem_ctrl_init(int reset) { struct exynos5420_clock *clk = (struct exynos5420_clock *)samsung_get_base_clock(); @@ -231,6 +231,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, struct exynos5420_phy_control *phy0_ctrl, *phy1_ctrl; struct exynos5420_dmc *drex0, *drex1; struct exynos5420_tzasc *tzasc0, *tzasc1; + struct mem_timings *mem; uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1; int chip; int i; @@ -244,6 +245,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, tzasc0 = (struct exynos5420_tzasc *)samsung_get_base_dmc_tzasc(); tzasc1 = (struct exynos5420_tzasc *)(samsung_get_base_dmc_tzasc() + DMC_OFFSET); + mem = clock_get_mem_timings(); /* Enable PAUSE for DREX */ setbits_le32(&clk->pause, ENABLE_BIT); diff --git a/arch/arm/cpu/armv7/exynos/exynos5_setup.h b/arch/arm/cpu/armv7/exynos/exynos5_setup.h index 53b0ace..b50af2f 100644 --- a/arch/arm/cpu/armv7/exynos/exynos5_setup.h +++ b/arch/arm/cpu/armv7/exynos/exynos5_setup.h @@ -890,16 +890,10 @@ enum { /* * Memory variant specific initialization code for DDR3 * - * @param mem Memory timings for this memory type. - * @param mem_iv_size Memory interleaving size is a configurable parameter - * which the DMC uses to decide how to split a memory - * chunk into smaller chunks to support concurrent - * accesses; may vary across boards. * @param reset Reset DDR PHY during initialization. * @return 0 if ok, SETUP_ERR_... if there is a problem */ -int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, - int reset); +int ddr3_mem_ctrl_init(int reset); /* Memory variant specific initialization code for LPDDR3 */ void lpddr3_mem_ctrl_init(void); -- 1.8.3.2

2 1

[U-Boot] [PATCH v2 0/2] Introduction of new board Peach-Pit
by Akshay Saraswat 24 May '14

24 May '14

This board is based on Exynos5420 and is similar to SMDK5420 board. Adding new and refactoring existing DT and config files to support both SMDK5420 and Peach-Pit. Changes since v1: - Added "Acked-by". Akshay Saraswat (2): Exynos5420: Introduce support for the Peach-Pit board Exynos5420: Let macros be used for exynos5420 arch/arm/cpu/armv7/exynos/exynos5_setup.h | 6 +- arch/arm/dts/Makefile | 3 +- arch/arm/dts/exynos5420-peach-pit.dts | 127 +++++++++++++++++++++++++ arch/arm/dts/exynos5420-smdk5420.dts | 23 +---- arch/arm/dts/exynos5420.dtsi | 70 -------------- arch/arm/dts/exynos54xx.dtsi | 151 ++++++++++++++++++++++++++++++ boards.cfg | 1 + include/configs/exynos5420.h | 46 +++++++++ include/configs/peach-pit.h | 27 ++++++ include/configs/smdk5420.h | 49 ++-------- 10 files changed, 367 insertions(+), 136 deletions(-) create mode 100644 arch/arm/dts/exynos5420-peach-pit.dts delete mode 100644 arch/arm/dts/exynos5420.dtsi create mode 100644 arch/arm/dts/exynos54xx.dtsi create mode 100644 include/configs/exynos5420.h create mode 100644 include/configs/peach-pit.h -- 1.8.3.2

2 4

[U-Boot] [PATCH v3] examples: select libgcc for non-default architecture
by Alexey Brodkin 23 May '14

23 May '14

In case of multilib-enabled toolchains if default architecture differ from the one examples are being built for linker will fail to link example object files with libgcc of another (non-compatible) architecture. Interesting enough for years in main Makefile we used CFLAGS/c_flags for this but not for examples. So fixing it now. Signed-off-by: Alexey Brodkin <abrodkin(a)synopsys.com> Cc: Masahiro Yamada <yamada.m(a)jp.panasonic.com> Cc: Tom Rini <trini(a)ti.com> Cc: Wolfgang Denx <wd(a)denx.de> --- In v3 we export PLATFORM_LIBGCC from the main Makefile and use it for examples --- Makefile | 1 + examples/standalone/Makefile | 4 +--- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index ff38a43..fd4e176 100644 --- a/Makefile +++ b/Makefile @@ -696,6 +696,7 @@ PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(c_flags) -print-libgcc-file-name` endif PLATFORM_LIBS += $(PLATFORM_LIBGCC) export PLATFORM_LIBS +export PLATFORM_LIBGCC # Special flags for CPP when processing the linker script. # Pass the version down so we can handle backwards compatibility diff --git a/examples/standalone/Makefile b/examples/standalone/Makefile index 9ab5446..2dacba2 100644 --- a/examples/standalone/Makefile +++ b/examples/standalone/Makefile @@ -38,8 +38,6 @@ targets += $(patsubst $(obj)/%,%,$(LIB)) $(COBJS) $(LIBOBJS-y) LIBOBJS := $(addprefix $(obj)/,$(LIBOBJS-y)) ELF := $(addprefix $(obj)/,$(ELF)) -gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`) - # For PowerPC there's no need to compile standalone applications as a # relocatable executable. The relocation data is not needed, and # also causes the entry point of the standalone application to be @@ -63,7 +61,7 @@ $(LIB): $(LIBOBJS) FORCE quiet_cmd_link_elf = LD $@ cmd_link_elf = $(LD) $(LDFLAGS) -g -Ttext $(CONFIG_STANDALONE_LOAD_ADDR) \ - -o $@ -e $(SYM_PREFIX)$(@F) $< $(LIB) -L$(gcclibdir) -lgcc + -o $@ -e $(SYM_PREFIX)$(@F) $< $(LIB) $(PLATFORM_LIBGCC) $(ELF): $(obj)/%: $(obj)/%.o $(LIB) FORCE $(call if_changed,link_elf) -- 1.9.0

4 3