With the move of the interrupt code to earlier in the sequence, we exposed a problem where the interrupts are disabled at each bootm stage. This is not correct - it should be done only once. Let's disable interrupts in the LOAD stage. Put the code in a function for clarity.
Also, bootz lost its interrupt code altogether, so reinstate it.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v2: None
common/cmd_bootm.c | 67 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 43 insertions(+), 24 deletions(-)
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c index 652513a..0c88be1 100644 --- a/common/cmd_bootm.c +++ b/common/cmd_bootm.c @@ -539,6 +539,42 @@ static int boot_selected_os(int argc, char * const argv[], int state, }
/** + * bootm_disable_interrupts() - Disable interrupts in preparation for load/boot + * + * @return interrupt flag (0 if interrupts were disabled, non-zero if they were + * enabled) + */ +static ulong bootm_disable_interrupts(void) +{ + ulong iflag; + + /* + * We have reached the point of no return: we are going to + * overwrite all exception vector code, so we cannot easily + * recover from any failures any more... + */ + iflag = disable_interrupts(); +#ifdef CONFIG_NETCONSOLE + /* Stop the ethernet stack if NetConsole could have left it up */ + eth_halt(); +#endif + +#if defined(CONFIG_CMD_USB) + /* + * turn off USB to prevent the host controller from writing to the + * SDRAM while Linux is booting. This could happen (at least for OHCI + * controller), because the HCCA (Host Controller Communication Area) + * lies within the SDRAM and the host controller writes continously to + * this area (as busmaster!). The HccaFrameNumber is for example + * updated every 1 ms within the HCCA structure in SDRAM! For more + * details see the OpenHCI specification. + */ + usb_stop(); +#endif + return iflag; +} + +/** * Execute selected states of the bootm command. * * Note the arguments to this state must be the first argument, Any 'bootm' @@ -588,34 +624,11 @@ static int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, argc = 0; /* consume the args */ }
- /* - * We have reached the point of no return: we are going to - * overwrite all exception vector code, so we cannot easily - * recover from any failures any more... - */ - iflag = disable_interrupts(); -#ifdef CONFIG_NETCONSOLE - /* Stop the ethernet stack if NetConsole could have left it up */ - eth_halt(); -#endif - -#if defined(CONFIG_CMD_USB) - /* - * turn off USB to prevent the host controller from writing to the - * SDRAM while Linux is booting. This could happen (at least for OHCI - * controller), because the HCCA (Host Controller Communication Area) - * lies within the SDRAM and the host controller writes continously to - * this area (as busmaster!). The HccaFrameNumber is for example - * updated every 1 ms within the HCCA structure in SDRAM! For more - * details see the OpenHCI specification. - */ - usb_stop(); -#endif - /* Load the OS */ if (!ret && (states & BOOTM_STATE_LOADOS)) { ulong load_end;
+ iflag = bootm_disable_interrupts(); ret = bootm_load_os(images, &load_end, 0); if (ret && ret != BOOTM_ERR_OVERLAP) goto err; @@ -1774,6 +1787,12 @@ int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (bootz_start(cmdtp, flag, argc, argv, &images)) return 1;
+ /* + * We are doing the BOOTM_STATE_LOADOS state ourselves, so must + * disable interrupts ourselves + */ + bootm_disable_interrupts(); + ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO, &images, 1);