Hi Sjoerd
2015-11-06 17:11 GMT+08:00 Sjoerd Simons <sjoerd.sim...@collabora.co.uk>:
> On Wed, 2015-11-04 at 20:53 +0800, Lin Huang wrote:
> > rk3036 only 4K size SRAM for SPL, so only support
> > timer, uart, sdram driver in SPL stage, when finish
> > initial sdram, back to bootrom.
> >
> > Signed-off-by: Lin Huang <h...@rock-chips.com>
> >
> >
> > diff --git a/arch/arm/mach-rockchip/rk3036/save_boot_param.S
> > b/arch/arm/mach-rockchip/rk3036/save_boot_param.S
> > new file mode 100644
> > index 0000000..3d3883d
> > --- /dev/null
> > +++ b/arch/arm/mach-rockchip/rk3036/save_boot_param.S
> > @@ -0,0 +1,34 @@
> > +/*
> > + * (C) Copyright 2015 Google, Inc
> > + *
> > + * SPDX-License-Identifier: GPL-2.0+
> > + */
> > +
> > +#include <linux/linkage.h>
> > +
> > +.globl SAVE_SP_ADDR
> > +SAVE_SP_ADDR:
> > + .word 0
> > +
> > +/*******************************************************************
> > ******
> > + *
> > + * void save_boot_params
> > + *
> > + * Save sp, lr, r1~r12
> > + *
> > +
> > *********************************************************************
> > ****/
> > +ENTRY(save_boot_params)
> > + push {r1-r12, lr}
> > + ldr r0, =SAVE_SP_ADDR
> > + str sp, [r0]
> > + b save_boot_params_ret @ back to my
> > caller
> > +ENDPROC(save_boot_params)
> > +
> > +
> > +.globl back_to_bootrom
> > +ENTRY(back_to_bootrom)
> > + ldr r0, =SAVE_SP_ADDR
> > + ldr sp, [r0]
> > + mov r0, #0
> > + pop {r1-r12, pc}
> > +ENDPROC(back_to_bootrom)
>
> Is this way of going back to be bootrom generic for other Rockchip SOCs
> as well?
>
Yes
>
> Specifically for RK3288 in maskrom mode we can currently load the
> u-boot SPL, but not the main loader. If we could use this method of
> going to the bootrom on that board that should be a nice way forward.
>
Agree.
Simon.What do you think?
>
>
> > diff --git a/include/configs/rk3036_common.h
> > b/include/configs/rk3036_common.h
> > new file mode 100644
> > index 0000000..f7bd852
> > --- /dev/null
> > +++ b/include/configs/rk3036_common.h
> > @@ -0,0 +1,120 @@
> > +/*
> > + * (C) Copyright 2015 Rockchip Electronics Co., Ltd
> > + *
> > + * SPDX-License-Identifier: GPL-2.0+
> > + */
> >
> > +/* RAW SD card / eMMC locations. */
> > +#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 256
> > +#define CONFIG_SYS_SPI_U_BOOT_OFFS (128 << 10)
>
> I don't think you need to define these if you're having the main u-boot
> image loaded by your bootrom rather then SPL directly.
>
> > +/* FAT sd card locations. */
> > +#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION 1
> > +#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME "u-boot.img"
>
> ditto
>
> > +/* #define CONFIG_SPL_PINCTRL_SUPPORT
> > +#define CONFIG_SPL_GPIO_SUPPORT
> > +#define CONFIG_SPL_RAM_SUPPORT
> > +#define CONFIG_SPL_DRIVERS_MISC_SUPPORT */
> > +
> > +#define CONFIG_CMD_CACHE
> > +#define CONFIG_CMD_TIME
> > +
> > +#define CONFIG_SYS_SDRAM_BASE 0x60000000
> > +#define CONFIG_NR_DRAM_BANKS 1
> > +#define SDRAM_BANK_SIZE (512UL << 20UL)
> > +
> > +#define CONFIG_SPI_FLASH
> > +#define CONFIG_SPI
> > +#define CONFIG_CMD_SF
> > +#define CONFIG_CMD_SPI
> > +#define CONFIG_SPI_FLASH_GIGADEVICE
> > +#define CONFIG_SF_DEFAULT_SPEED 20000000
>
> > +#define CONFIG_CMD_I2C
> > +
> > +#ifndef CONFIG_SPL_BUILD
> > +#include <config_distro_defaults.h>
> > +
> > +#define ENV_MEM_LAYOUT_SETTINGS \
> > + "scriptaddr=0x00000000\0" \
> > + "pxefile_addr_r=0x00100000\0" \
> > + "fdt_addr_r=0x01f00000\0" \
> > + "kernel_addr_r=0x02000000\0" \
> > + "ramdisk_addr_r=0x04000000\0"
>
> I suspect these offset don't make sense for this board given your
> SYS_SDRAM_BASE is 0x60000000
>
> > +/* First try to boot from SD (index 0), then eMMC (index 1 */
> > +#define BOOT_TARGET_DEVICES(func) \
> > + func(MMC, mmc, 0) \
> > + func(MMC, mmc, 1)
> > +
> > +#include <config_distro_bootcmd.h>
> > +
> > +/* Linux fails to load the fdt if it's loaded above 512M on a Rock 2
> > board, so
> > + * limit the fdt reallocation to that */
>
> You probably want to change the comment here :)
>
> > +#define CONFIG_EXTRA_ENV_SETTINGS \
> > + "fdt_high=0x1fffffff\0" \
>
> Hopefully the fdt_high isn't needed on 3036? (It's hopefully temporary
> as well on 3288 until someone figures out what's wrong.
>
> > + ENV_MEM_LAYOUT_SETTINGS \
> > + BOOTENV
> > +#endif
> > +
> > +#endif
>
> --
> Sjoerd Simons
> Collabora Ltd.
>
>
>
--
Eddie
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