diff options
Diffstat (limited to 'arch/arm/cpu/arm1136')
| -rw-r--r-- | arch/arm/cpu/arm1136/config.mk | 3 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/cpu.c | 22 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/generic.c | 75 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/mx35_sdram.c | 137 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/start.S | 31 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/u-boot-spl.lds | 62 |
7 files changed, 310 insertions, 21 deletions
diff --git a/arch/arm/cpu/arm1136/config.mk b/arch/arm/cpu/arm1136/config.mk index efee0d1dc..9092d914f 100644 --- a/arch/arm/cpu/arm1136/config.mk +++ b/arch/arm/cpu/arm1136/config.mk @@ -31,3 +31,6 @@ PLATFORM_CPPFLAGS += -march=armv5 # ========================================================================= PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT) +ifdef CONFIG_SPL_BUILD +ALL-y += $(OBJTREE)/SPL +endif diff --git a/arch/arm/cpu/arm1136/cpu.c b/arch/arm/cpu/arm1136/cpu.c index b98e3d9fa..32a4c244c 100644 --- a/arch/arm/cpu/arm1136/cpu.c +++ b/arch/arm/cpu/arm1136/cpu.c @@ -141,16 +141,6 @@ void flush_cache(unsigned long start, unsigned long size) flush_dcache_range(start, start + size); } -void enable_caches(void) -{ -#ifndef CONFIG_SYS_ICACHE_OFF - icache_enable(); -#endif -#ifndef CONFIG_SYS_DCACHE_OFF - dcache_enable(); -#endif -} - #else /* #ifndef CONFIG_SYS_DCACHE_OFF */ void invalidate_dcache_all(void) { @@ -172,3 +162,15 @@ void flush_cache(unsigned long start, unsigned long size) { } #endif /* #ifndef CONFIG_SYS_DCACHE_OFF */ + +#if !defined(CONFIG_SYS_ICACHE_OFF) || !defined(CONFIG_SYS_DCACHE_OFF) +void enable_caches(void) +{ +#ifndef CONFIG_SYS_ICACHE_OFF + icache_enable(); +#endif +#ifndef CONFIG_SYS_DCACHE_OFF + dcache_enable(); +#endif +} +#endif diff --git a/arch/arm/cpu/arm1136/mx35/Makefile b/arch/arm/cpu/arm1136/mx35/Makefile index 469397ca4..f4ababbe5 100644 --- a/arch/arm/cpu/arm1136/mx35/Makefile +++ b/arch/arm/cpu/arm1136/mx35/Makefile @@ -30,6 +30,7 @@ LIB = $(obj)lib$(SOC).o COBJS += generic.o COBJS += timer.o COBJS += iomux.o +COBJS += mx35_sdram.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) diff --git a/arch/arm/cpu/arm1136/mx35/generic.c b/arch/arm/cpu/arm1136/mx35/generic.c index 41e9639d9..98aa4d15b 100644 --- a/arch/arm/cpu/arm1136/mx35/generic.c +++ b/arch/arm/cpu/arm1136/mx35/generic.c @@ -35,6 +35,7 @@ #include <fsl_esdhc.h> #endif #include <netdev.h> +#include <spl.h> #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel)) #define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF) @@ -492,3 +493,77 @@ void reset_cpu(ulong addr) struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR; writew(4, &wdog->wcr); } + +#define RCSR_MEM_CTL_WEIM 0 +#define RCSR_MEM_CTL_NAND 1 +#define RCSR_MEM_CTL_ATA 2 +#define RCSR_MEM_CTL_EXPANSION 3 +#define RCSR_MEM_TYPE_NOR 0 +#define RCSR_MEM_TYPE_ONENAND 2 +#define RCSR_MEM_TYPE_SD 0 +#define RCSR_MEM_TYPE_I2C 2 +#define RCSR_MEM_TYPE_SPI 3 + +u32 spl_boot_device(void) +{ + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + + u32 rcsr = readl(&ccm->rcsr); + u32 mem_type, mem_ctl; + + /* In external mode, no boot device is returned */ + if ((rcsr >> 10) & 0x03) + return BOOT_DEVICE_NONE; + + mem_ctl = (rcsr >> 25) & 0x03; + mem_type = (rcsr >> 23) & 0x03; + + switch (mem_ctl) { + case RCSR_MEM_CTL_WEIM: + switch (mem_type) { + case RCSR_MEM_TYPE_NOR: + return BOOT_DEVICE_NOR; + case RCSR_MEM_TYPE_ONENAND: + return BOOT_DEVICE_ONE_NAND; + default: + return BOOT_DEVICE_NONE; + } + case RCSR_MEM_CTL_NAND: + return BOOT_DEVICE_NAND; + case RCSR_MEM_CTL_EXPANSION: + switch (mem_type) { + case RCSR_MEM_TYPE_SD: + return BOOT_DEVICE_MMC1; + case RCSR_MEM_TYPE_I2C: + return BOOT_DEVICE_I2C; + case RCSR_MEM_TYPE_SPI: + return BOOT_DEVICE_SPI; + default: + return BOOT_DEVICE_NONE; + } + } + + return BOOT_DEVICE_NONE; +} + +#ifdef CONFIG_SPL_BUILD +u32 spl_boot_mode(void) +{ + switch (spl_boot_device()) { + case BOOT_DEVICE_MMC1: +#ifdef CONFIG_SPL_FAT_SUPPORT + return MMCSD_MODE_FAT; +#else + return MMCSD_MODE_RAW; +#endif + break; + case BOOT_DEVICE_NAND: + return 0; + break; + default: + puts("spl: ERROR: unsupported device\n"); + hang(); + } +} +#endif diff --git a/arch/arm/cpu/arm1136/mx35/mx35_sdram.c b/arch/arm/cpu/arm1136/mx35/mx35_sdram.c new file mode 100644 index 000000000..f7e682c8c --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/mx35_sdram.c @@ -0,0 +1,137 @@ +/* + * Copyright (C) 2012, Stefano Babic <sbabic@denx.de> + * + * 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 <asm/io.h> +#include <asm/errno.h> +#include <asm/arch/imx-regs.h> +#include <linux/types.h> +#include <asm/arch/sys_proto.h> + +#define ESDCTL_DDR2_EMR2 0x04000000 +#define ESDCTL_DDR2_EMR3 0x06000000 +#define ESDCTL_PRECHARGE 0x00000400 +#define ESDCTL_DDR2_EN_DLL 0x02000400 +#define ESDCTL_DDR2_RESET_DLL 0x00000333 +#define ESDCTL_DDR2_MR 0x00000233 +#define ESDCTL_DDR2_OCD_DEFAULT 0x02000780 + +enum { + SMODE_NORMAL = 0, + SMODE_PRECHARGE, + SMODE_AUTO_REFRESH, + SMODE_LOAD_REG, + SMODE_MANUAL_REFRESH +}; + +#define set_mode(x, en, m) (x | (en << 31) | (m << 28)) + +static inline void dram_wait(unsigned int count) +{ + volatile unsigned int wait = count; + + while (wait--) + ; + +} + +void mx3_setup_sdram_bank(u32 start_address, u32 ddr2_config, + u32 row, u32 col, u32 dsize, u32 refresh) +{ + struct esdc_regs *esdc = (struct esdc_regs *)ESDCTL_BASE_ADDR; + u32 *cfg_reg, *ctl_reg; + u32 val; + u32 ctlval; + + switch (start_address) { + case CSD0_BASE_ADDR: + cfg_reg = &esdc->esdcfg0; + ctl_reg = &esdc->esdctl0; + break; + case CSD1_BASE_ADDR: + cfg_reg = &esdc->esdcfg1; + ctl_reg = &esdc->esdctl1; + break; + default: + return; + } + + /* The MX35 supports 11 up to 14 rows */ + if (row < 11 || row > 14 || col < 8 || col > 10) + return; + ctlval = (row - 11) << 24 | (col - 8) << 20 | (dsize << 16); + + /* Initialize MISC register for DDR2 */ + val = ESDC_MISC_RST | ESDC_MISC_MDDR_EN | ESDC_MISC_MDDR_DL_RST | + ESDC_MISC_DDR_EN | ESDC_MISC_DDR2_EN; + writel(val, &esdc->esdmisc); + val &= ~(ESDC_MISC_RST | ESDC_MISC_MDDR_DL_RST); + writel(val, &esdc->esdmisc); + + /* + * according to DDR2 specs, wait a while before + * the PRECHARGE_ALL command + */ + dram_wait(0x20000); + + /* Load DDR2 config and timing */ + writel(ddr2_config, cfg_reg); + + /* Precharge ALL */ + writel(set_mode(ctlval, 1, SMODE_PRECHARGE), + ctl_reg); + writel(0xda, start_address + ESDCTL_PRECHARGE); + + /* Load mode */ + writel(set_mode(ctlval, 1, SMODE_LOAD_REG), + ctl_reg); + writeb(0xda, start_address + ESDCTL_DDR2_EMR2); /* EMRS2 */ + writeb(0xda, start_address + ESDCTL_DDR2_EMR3); /* EMRS3 */ + writeb(0xda, start_address + ESDCTL_DDR2_EN_DLL); /* Enable DLL */ + writeb(0xda, start_address + ESDCTL_DDR2_RESET_DLL); /* Reset DLL */ + + /* Precharge ALL */ + writel(set_mode(ctlval, 1, SMODE_PRECHARGE), + ctl_reg); + writel(0xda, start_address + ESDCTL_PRECHARGE); + + /* Set mode auto refresh : at least two refresh are required */ + writel(set_mode(ctlval, 1, SMODE_AUTO_REFRESH), + ctl_reg); + writel(0xda, start_address); + writel(0xda, start_address); + + writel(set_mode(ctlval, 1, SMODE_LOAD_REG), + ctl_reg); + writeb(0xda, start_address + ESDCTL_DDR2_MR); + writeb(0xda, start_address + ESDCTL_DDR2_OCD_DEFAULT); + + /* OCD mode exit */ + writeb(0xda, start_address + ESDCTL_DDR2_EN_DLL); /* Enable DLL */ + + /* Set normal mode */ + writel(set_mode(ctlval, 1, SMODE_NORMAL) | refresh, + ctl_reg); + + dram_wait(0x20000); + + /* Do not set delay lines, only for MDDR */ +} diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index 3752af9dd..5d3b4c229 100644 --- a/arch/arm/cpu/arm1136/start.S +++ b/arch/arm/cpu/arm1136/start.S @@ -100,6 +100,10 @@ _TEXT_BASE: _bss_start_ofs: .word __bss_start - _start +.global _image_copy_end_ofs +_image_copy_end_ofs: + .word __image_copy_end - _start + .globl _bss_end_ofs _bss_end_ofs: .word __bss_end__ - _start @@ -193,7 +197,7 @@ stack_setup: moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */ beq clear_bss /* skip relocation */ mov r1, r6 /* r1 <- scratch for copy_loop */ - ldr r3, _bss_start_ofs + ldr r3, _image_copy_end_ofs add r2, r0, r3 /* r2 <- source end address */ copy_loop: @@ -241,15 +245,28 @@ fixnext: add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ cmp r2, r3 blo fixloop + b clear_bss + +_rel_dyn_start_ofs: + .word __rel_dyn_start - _start +_rel_dyn_end_ofs: + .word __rel_dyn_end - _start +_dynsym_start_ofs: + .word __dynsym_start - _start #endif clear_bss: -#ifndef CONFIG_SPL_BUILD +#ifdef CONFIG_SPL_BUILD + /* No relocation for SPL */ + ldr r0, =__bss_start + ldr r1, =__bss_end__ +#else ldr r0, _bss_start_ofs ldr r1, _bss_end_ofs mov r4, r6 /* reloc addr */ add r0, r0, r4 add r1, r1, r4 +#endif mov r2, #0x00000000 /* clear */ clbss_l:cmp r0, r1 /* clear loop... */ @@ -258,7 +275,6 @@ clbss_l:cmp r0, r1 /* clear loop... */ add r0, r0, #4 b clbss_l clbss_e: -#endif /* #ifndef CONFIG_SPL_BUILD */ /* * We are done. Do not return, instead branch to second part of board @@ -273,7 +289,7 @@ _nand_boot_ofs: #else jump_2_ram: ldr r0, _board_init_r_ofs - ldr r1, _TEXT_BASE + adr r1, _start add lr, r0, r1 add lr, lr, r9 /* setup parameters for board_init_r */ @@ -286,13 +302,6 @@ _board_init_r_ofs: .word board_init_r - _start #endif -_rel_dyn_start_ofs: - .word __rel_dyn_start - _start -_rel_dyn_end_ofs: - .word __rel_dyn_end - _start -_dynsym_start_ofs: - .word __dynsym_start - _start - /* ************************************************************************* * diff --git a/arch/arm/cpu/arm1136/u-boot-spl.lds b/arch/arm/cpu/arm1136/u-boot-spl.lds new file mode 100644 index 000000000..a0462ab97 --- /dev/null +++ b/arch/arm/cpu/arm1136/u-boot-spl.lds @@ -0,0 +1,62 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> + * + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * Aneesh V <aneesh@ti.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 + */ + +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/arm1136/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 +} |