mx51evk: Update environment in order to allow booting a dt kernel
authorFabio Estevam <fabio.estevam@freescale.com>
Fri, 19 Apr 2013 11:04:36 +0000 (11:04 +0000)
committerStefano Babic <sbabic@denx.de>
Thu, 25 Apr 2013 19:43:30 +0000 (21:43 +0200)
Update the environment as done in other imx boards to allow easy switching
between booting a non-dt kernel and a dt kernel.

Change CONFIG_LOADADDR to 0x92000000, so that we can have the:

- uImage at 0x92000000
- imx51-babbage.dtb at 0x91000000

,which are adequate locations in RAM to avoid overlapping.

Boot tested the following kernels:

- 2.6.35 from FSL (11.09 branch)
- 3.9-rc7 non-dt
- 3.9-rc7 dt

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>
include/configs/mx51evk.h

index cb3d938..4545a80 100644 (file)
 
 #define CONFIG_ETHPRIME                "FEC0"
 
-#define CONFIG_LOADADDR                0x90800000      /* loadaddr env var */
+#define CONFIG_LOADADDR                0x92000000      /* loadaddr env var */
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
        "script=boot.scr\0" \
        "uimage=uImage\0" \
+       "fdt_file=imx51-babbage.dtb\0" \
+       "fdt_addr=0x91000000\0" \
+       "boot_fdt=try\0" \
+       "ip_dyn=yes\0" \
        "mmcdev=0\0" \
        "mmcpart=2\0" \
        "mmcroot=/dev/mmcblk0p3 rw\0" \
        "bootscript=echo Running bootscript from mmc ...; " \
                "source\0" \
        "loaduimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}\0" \
+       "loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
        "mmcboot=echo Booting from mmc ...; " \
                "run mmcargs; " \
-               "bootm\0" \
+               "if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+                       "if run loadfdt; then " \
+                               "bootm ${loadaddr} - ${fdt_addr}; " \
+                       "else " \
+                               "if test ${boot_fdt} = try; then " \
+                                       "bootm; " \
+                               "else " \
+                                       "echo WARN: Cannot load the DT; " \
+                               "fi; " \
+                       "fi; " \
+               "else " \
+                       "bootm; " \
+               "fi;\0" \
        "netargs=setenv bootargs console=ttymxc0,${baudrate} " \
                "root=/dev/nfs " \
                "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
        "netboot=echo Booting from net ...; " \
                "run netargs; " \
-               "dhcp ${uimage}; bootm\0" \
+               "if test ${ip_dyn} = yes; then " \
+                       "setenv get_cmd dhcp; " \
+               "else " \
+                       "setenv get_cmd tftp; " \
+               "fi; " \
+               "${get_cmd} ${uimage}; " \
+               "if test ${boot_fdt} = yes ||  test ${boot_fdt} = try; then " \
+                       "if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
+                               "bootm ${loadaddr} - ${fdt_addr}; " \
+                       "else " \
+                               "if test ${boot_fdt} = try; then " \
+                                       "bootm; " \
+                               "else " \
+                                       "echo ERROR: Cannot load the DT; " \
+                                       "exit; " \
+                               "fi; " \
+                       "fi; " \
+               "else " \
+                       "bootm; " \
+               "fi;\0"
 
 #define CONFIG_BOOTCOMMAND \
        "mmc dev ${mmcdev}; if mmc rescan; then " \