[U-Boot] [PATCH 6/6] am335x_evm: Add support to boot from NOR.

Tom Rini
2013-05-08T22:45:57Z

From: Steve Kipisz <s-kipisz2@ti.com>

NOR requires that s_init be within the first 4KiB of the image so that
we can perform the rest of the required pinmuxing to talk with the rest
of NOR that we are found on. When NOR_BOOT is set we save our
environment in NOR at 512KiB and a redundant copy at 768KiB.

Signed-off-by: Steve Kipisz <s-kipisz2@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
---
arch/arm/cpu/armv7/am33xx/emif4.c | 6 +-
board/ti/am335x/Makefile | 2 +-
board/ti/am335x/board.c | 31 ++++++++++-
board/ti/am335x/mux.c | 6 +-
board/ti/am335x/u-boot.lds | 110 +++++++++++++++++++++++++++++++++++++
boards.cfg | 1 +
include/configs/am335x_evm.h | 27 ++++++++-
7 files changed, 174 insertions(+), 9 deletions(-)
create mode 100644 board/ti/am335x/u-boot.lds

diff --git a/arch/arm/cpu/armv7/am33xx/emif4.c b/arch/arm/cpu/armv7/am33xx/emif4.c
index aa84e96..370230b 100644
--- a/arch/arm/cpu/armv7/am33xx/emif4.c
+++ b/arch/arm/cpu/armv7/am33xx/emif4.c
@@ -43,9 +43,11 @@ void dram_init_banksize(void)
}

-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT)
+#ifdef CONFIG_TI81XX
static struct dmm_lisa_map_regs *hw_lisa_map_regs =
(struct dmm_lisa_map_regs *)DMM_BASE;
+#endif
static struct vtp_reg *vtpreg[2] = {
(struct vtp_reg *)VTP0_CTRL_ADDR,
(struct vtp_reg *)VTP1_CTRL_ADDR};
@@ -53,6 +55,7 @@ static struct vtp_reg *vtpreg[2] = {
static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
#endif

+#ifdef CONFIG_TI81XX
void config_dmm(const struct dmm_lisa_map_regs *regs)
{
enable_dmm_clocks();
@@ -67,6 +70,7 @@ void config_dmm(const struct dmm_lisa_map_regs *regs)
writel(regs->dmm_lisa_map_1, &hw_lisa_map_regs->dmm_lisa_map_1);
writel(regs->dmm_lisa_map_0, &hw_lisa_map_regs->dmm_lisa_map_0);
}
+#endif

static void config_vtp(int nr)
{
diff --git a/board/ti/am335x/Makefile b/board/ti/am335x/Makefile
index 67a87a1..1795e3e 100644
--- a/board/ti/am335x/Makefile
+++ b/board/ti/am335x/Makefile
@@ -18,7 +18,7 @@ include $(TOPDIR)/config.mk

LIB = $(obj)lib$(BOARD).o

-ifdef CONFIG_SPL_BUILD
+ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_NOR_BOOT),y)
COBJS := mux.o
endif

diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index 6f6b5d0..a0ad4bc 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -38,7 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;

static struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BUILD) || (CONFIG_NOR_BOOT)
static struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
#endif

@@ -94,7 +94,7 @@ static int read_eeprom(struct am335x_baseboard_id *header)
}

/* UART Defines */
-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT)
#define UART_RESET (0x1 << 1)
#define UART_CLK_RUNNING_MASK 0x1
#define UART_SMART_IDLE_EN (0x1 << 0x3)
@@ -273,6 +273,24 @@ void s_init(void)
{
__maybe_unused struct am335x_baseboard_id header;

+ /*
+ * The ROM will only have set up sufficient pinmux to allow for the
+ * first 4KiB NOR to be read, we must finish doing what we know of
+ * the NOR mux in this space in order to continue.
+ */
+#ifdef CONFIG_NOR_BOOT
+ asm("stmfd sp!, {r2 - r4}");
+ asm("movw r4, #0x8A4");
+ asm("movw r3, #0x44E1");
+ asm("orr r4, r4, r3, lsl #16");
+ asm("mov r2, #9");
+ asm("mov r3, #8");
+ asm("gpmc_mux: str r2, [r4], #4");
+ asm("subs r3, r3, #1");
+ asm("bne gpmc_mux");
+ asm("ldmfd sp!, {r2 - r4}");
+#endif
+
/* WDT1 is already running when the bootloader gets control
* Disable it to avoid "random" resets
*/
@@ -283,7 +301,7 @@ void s_init(void)
while (readl(&wdtimer->wdtwwps) != 0x0)
;

-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BUILD) || defined(CONFIG_NOR_BOOT)
/* Setup the PLLs and the clocks for the peripherals */
pll_init();

@@ -324,9 +342,16 @@ void s_init(void)
regVal |= UART_SMART_IDLE_EN;
writel(regVal, &uart_base->uartsyscfg);

+#if defined(CONFIG_NOR_BOOT)
+ /* We want our console now. */
+ gd->baudrate = CONFIG_BAUDRATE;
+ serial_init();
+ gd->have_console = 1;
+#else
gd = &gdata;

preloader_console_init();
+#endif

/* Initalize the board header */
enable_i2c0_pin_mux();
diff --git a/board/ti/am335x/mux.c b/board/ti/am335x/mux.c
index 187468e..5b7ed63 100644
--- a/board/ti/am335x/mux.c
+++ b/board/ti/am335x/mux.c
@@ -190,7 +190,7 @@ static struct module_pin_mux nand_pin_mux[] = {
{-1},
};

-#if defined(CONFIG_NOR)
+#if defined(CONFIG_NOR) && !defined(CONFIG_NOR_BOOT)
static struct module_pin_mux bone_norcape_pin_mux[] = {
{OFFSET(lcd_data0), MODE(1) | PULLUDEN | RXACTIVE}, /* NOR_A0 */
{OFFSET(lcd_data1), MODE(1) | PULLUDEN | RXACTIVE}, /* NOR_A1 */
@@ -317,8 +317,10 @@ void enable_board_pin_mux(struct am335x_baseboard_id *header)
configure_module_pin_mux(i2c1_pin_mux);
configure_module_pin_mux(mii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
+#ifndef CONFIG_NOR
configure_module_pin_mux(mmc1_pin_mux);
-#if defined(CONFIG_NOR)
+#endif
+#if defined(CONFIG_NOR) && !defined(CONFIG_NOR_BOOT)
configure_module_pin_mux(bone_norcape_pin_mux);
#endif
} else if (board_is_gp_evm(header)) {
diff --git a/board/ti/am335x/u-boot.lds b/board/ti/am335x/u-boot.lds
new file mode 100644
index 0000000..d376743
--- /dev/null
+++ b/board/ti/am335x/u-boot.lds
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2004-2008 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@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
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+ . = 0x00000000;
+
+ . = ALIGN(4);
+ .text :
+ {
+ __image_copy_start = .;
+ CPUDIR/start.o (.text*)
+ board/ti/am335x/libam335x.o (.text*)
+ *(.text*)
+ }
+
+ . = ALIGN(4);
+ .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+ . = ALIGN(4);
+ .data : {
+ *(.data*)
+ }
+
+ . = ALIGN(4);
+
+ . = .;
+
+ . = ALIGN(4);
+ .u_boot_list : {
+ KEEP(*(SORT(.u_boot_list*)));
+ }
+
+ . = ALIGN(4);
+
+ __image_copy_end = .;
+
+ .rel.dyn : {
+ __rel_dyn_start = .;
+ *(.rel*)
+ __rel_dyn_end = .;
+ }
+
+ .dynsym : {
+ __dynsym_start = .;
+ *(.dynsym)
+ }
+
+ _end = .;
+
+ /*
+ * Deprecated: this MMU section is used by pxa at present but
+ * should not be used by new boards/CPUs.
+ */
+ . = ALIGN(4096);
+ .mmutable : {
+ *(.mmutable)
+ }
+
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
+ .bss_start __rel_dyn_start (OVERLAY) : {
+ KEEP(*(.__bss_start));
+ __bss_base = .;
+ }
+
+ .bss __bss_base (OVERLAY) : {
+ *(.bss*)
+ . = ALIGN(4);
+ __bss_limit = .;
+ }
+
+ .bss_end __bss_limit (OVERLAY) : {
+ KEEP(*(.__bss_end));
+ }
+
+ /DISCARD/ : { *(.dynstr*) }
+ /DISCARD/ : { *(.dynamic*) }
+ /DISCARD/ : { *(.plt*) }
+ /DISCARD/ : { *(.interp*) }
+ /DISCARD/ : { *(.gnu*) }
+}
diff --git a/boards.cfg b/boards.cfg
index d74840d..90e018f 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -237,6 +237,7 @@ integratorcp_cm946es arm arm946es integrator armltd
ca9x4_ct_vxp arm armv7 vexpress armltd
am335x_evm arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1
am335x_evm_nor arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1,NOR
+am335x_evm_norboot arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1,NOR,NOR_BOOT
am335x_evm_spiboot arm armv7 am335x ti am33xx am335x_evm:SERIAL1,CONS_INDEX=1,SPI_BOOT
am335x_evm_uart1 arm armv7 am335x ti am33xx am335x_evm:SERIAL2,CONS_INDEX=2
am335x_evm_uart2 arm armv7 am335x ti am33xx am335x_evm:SERIAL3,CONS_INDEX=3
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 343a4aa..abc477b 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -39,6 +39,9 @@
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_INITRD_TAG

+/* Custom script for NOR */
+#define CONFIG_SYS_LDSCRIPT "board/ti/am335x/u-boot.lds"
+
#define CONFIG_SYS_CACHELINE_SIZE 64

/* commands to include */
@@ -300,6 +303,7 @@
#define CONFIG_ENV_OVERWRITE 1
#define CONFIG_SYS_CONSOLE_INFO_QUIET

+#ifndef CONFIG_NOR_BOOT
/* Defines for SPL */
#define CONFIG_SPL
#define CONFIG_SPL_FRAMEWORK
@@ -343,6 +347,8 @@
#define CONFIG_SPL_NAND_BASE
#define CONFIG_SPL_NAND_DRIVERS
#define CONFIG_SPL_NAND_ECC
+#endif
+
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT (CONFIG_SYS_NAND_BLOCK_SIZE / \
CONFIG_SYS_NAND_PAGE_SIZE)
@@ -376,14 +382,18 @@
* header. That is 0x800FFFC0--0x80100000 should not be used for any
* other needs.
*/
+#ifdef CONFIG_NOR_BOOT
+#define CONFIG_SYS_TEXT_BASE 0x08000000
+#else
#define CONFIG_SYS_TEXT_BASE 0x80800000
+#endif
#define CONFIG_SYS_SPL_MALLOC_START 0x80208000
#define CONFIG_SYS_SPL_MALLOC_SIZE 0x100000

/* Since SPL did pll and ddr initialization for us,
* we don't need to do it twice.
*/
-#ifndef CONFIG_SPL_BUILD
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_NOR_BOOT)
#define CONFIG_SKIP_LOWLEVEL_INIT
#endif

@@ -470,7 +480,7 @@
#define CONFIG_PHY_ADDR 0
#define CONFIG_PHY_SMSC

-#if !defined(CONFIG_SPI_BOOT)
+#if !defined(CONFIG_SPI_BOOT) && !defined(CONFIG_NOR_BOOT)
#define CONFIG_NAND
#endif

@@ -520,6 +530,19 @@
#define CONFIG_SYS_FLASH_BASE (0x08000000)
#define CONFIG_SYS_FLASH_CFI_WIDTH FLASH_CFI_16BIT
#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_FLASH_BASE
+#ifdef CONFIG_NOR_BOOT
+#define CONFIG_ENV_IS_IN_FLASH
+#define CONFIG_ENV_SECT_SIZE (128 << 10) /* 128 KiB */
+#define CONFIG_ENV_OFFSET (512 << 10) /* 512 KiB */
+#define CONFIG_ENV_OFFSET_REDUND (768 << 10) /* 768 KiB */
+#define CONFIG_CMD_MTDPARTS
+#define MTDIDS_DEFAULT "nor0=physmap-flash.0"
+#define MTDPARTS_DEFAULT "mtdparts=physmap-flash.0:" \
+ "512k(u-boot)," \
+ "128k(u-boot-env1)," \
+ "128k(u-boot-env2)," \
+ "4m(kernel),-(rootfs)"
+#endif
#define CONFIG_MTD_DEVICE
#define CONFIG_CMD_FLASH
#endif /* NOR support */
--
1.7.9.5