Add a new symbol, CONFIG_SPL_BOOTCOUNT_SUPPORT, to make use of the existing BOOTCOUNT_SUPPORT within SPL. It is strongly discouraged to use bootcount in both SPL and full U-Boot, as they use the same counter.
Signed-off-by: Tom Rini trini@ti.com --- README | 6 ++++++ common/spl/spl.c | 27 +++++++++++++++++++++++++++ doc/README.falcon | 8 +++++++- include/spl.h | 1 + spl/Makefile | 1 + 5 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/README b/README index de17f59..5351d24 100644 --- a/README +++ b/README @@ -3035,6 +3035,12 @@ FIT uImage format: Enable booting directly to an OS from SPL. See also: doc/README.falcon
+ CONFIG_SPL_BOOTCOUNT_LIMIT + Optional part of CONFIG_SPL_OS_BOOT and requires + CONFIG_SPL_ENV_SUPPORT. Adds the bootcount facility to + SPL. It is strongly encouraged to not use bootcount in + both SPL and full U-Boot. + CONFIG_SPL_DISPLAY_PRINT For ARM, enable an optional function to print more information about the running system. diff --git a/common/spl/spl.c b/common/spl/spl.c index da31457..ffa49d9 100644 --- a/common/spl/spl.c +++ b/common/spl/spl.c @@ -38,6 +38,10 @@ static bd_t bdata __attribute__ ((section(".data"))); * * Please implement your own board specific funcion to do this. * + * If both CONFIG_SPL_BOOTCOUNT_LIMIT and CONFIG_SPL_ENV_SUPPORT are + * set this function is responsible for calling + * spl_bootcount_limit_exceeded(); + * * RETURN * 0 to not start u-boot * positive if u-boot should start @@ -49,6 +53,29 @@ __weak int spl_start_uboot(void) puts("SPL: Direct Linux boot not active!\n"); return 1; } + +#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) && defined(CONFIG_SPL_ENV_SUPPORT) +/* + * Determine if we have exceeded our bootlimit. + * + * @return 1 if we have exceeded our limit, 0 otherwise. + */ +int spl_bootcount_limit_exceeded(void) +{ + unsigned long bootcount = 0; + unsigned long bootlimit = 0; + + bootcount = bootcount_load(); + bootcount++; + bootcount_store (bootcount); + setenv_ulong("bootcount", bootcount); + bootlimit = getenv_ulong("bootlimit", 10, 0); + printf("bootcount: %ld\nbootlimit: %ld\n", bootcount, bootlimit); + if (bootlimit) + return bootcount > bootlimit; + return 0; +} +#endif /* CONFIG_BOOTCOUNT_LIMIT && CONFIG_SPL_ENV_SUPPORT */ #endif
/* diff --git a/doc/README.falcon b/doc/README.falcon index 82a254b..c34c171 100644 --- a/doc/README.falcon +++ b/doc/README.falcon @@ -70,6 +70,8 @@ CONFIG_CMD_SPL_WRITE_SIZE Size of the parameters area to be copied
CONFIG_SPL_OS_BOOT Activate Falcon Mode.
+CONFIG_SPL_BOOTCOUNT_LIMIT Use bootcount support to fall back to U-Boot + Function that a board must implement ------------------------------------
@@ -78,7 +80,8 @@ void spl_board_prepare_for_linux(void) : optional
spl_start_uboot() : required Returns "0" if SPL should start the kernel, "1" if U-Boot - must be started. + must be started. Must call spl_bootcount_limit_exceeded if + CONFIG_SPL_BOOTCOUNT_LIMIT is to be supported
Environment variables --------------------- @@ -89,6 +92,9 @@ mode. In this case the following variables may be supported: boot_os : Set to yes/Yes/true/True/1 to enable booting to OS, any other value to fall back to U-Boot (including unset) +bootlimit : As part of CONFIG_SPL_BOOTCOUNT_LIMIT used to set the + maximum number of times to try and boot the OS before + falling back to U-Boot. falcon_args_file : Filename to load as the 'args' portion of falcon mode rather than the hard-coded value. falcon_image_file : Filename to load as the OS image portion of falcon diff --git a/include/spl.h b/include/spl.h index 2bd6e16..ca654b3 100644 --- a/include/spl.h +++ b/include/spl.h @@ -37,6 +37,7 @@ void spl_parse_image_header(const struct image_header *header); void spl_board_prepare_for_linux(void); void __noreturn jump_to_image_linux(void *arg); int spl_start_uboot(void); +int spl_bootcount_limit_exceeded(void); void spl_display_print(void);
/* NAND SPL functions */ diff --git a/spl/Makefile b/spl/Makefile index fa642ec..2a34df8 100644 --- a/spl/Makefile +++ b/spl/Makefile @@ -99,6 +99,7 @@ LIBS-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/phy/libphy.o LIBS-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/net/phy/libphy.o LIBS-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += drivers/usb/musb-new/libusb_musb-new.o LIBS-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/usb/gadget/libusb_gadget.o +LIBS-$(CONFIG_SPL_BOOTCOUNT_LIMIT) += drivers/bootcount/libbootcount.o LIBS-$(CONFIG_SPL_WATCHDOG_SUPPORT) += drivers/watchdog/libwatchdog.o
ifneq ($(CONFIG_OMAP_COMMON),)