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bootm: Disable interrupts before loading OS

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This restores the ordering of interrupt disable to what it what before
commit 35fc84fa. It seems that on some archiectures (e.g. PowerPC) the
OS is loaded into an interrupt region, which can cause problems if
interrupts are still running.

Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2013-06-28 00:46:12 -07:00 • committed by Tom Rini
parent d366438d8a
commit 5ff0d0832e
1 changed files with 27 additions and 26 deletions
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53
common/cmd_bootm.c
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@ -516,36 +516,13 @@ static cmd_tbl_t cmd_bootm_sub[] = {
}; };
static int boot_selected_os(int argc, char * const argv[], int state, static int boot_selected_os(int argc, char * const argv[], int state,
bootm_headers_t *images, boot_os_fn *boot_fn, ulong *iflag) bootm_headers_t *images, boot_os_fn *boot_fn)
{ {
if (images->os.type == IH_TYPE_STANDALONE) { if (images->os.type == IH_TYPE_STANDALONE) {
/* This may return when 'autostart' is 'no' */ /* This may return when 'autostart' is 'no' */
bootm_start_standalone(argc, argv); bootm_start_standalone(argc, argv);
return 0; return 0;
} }
/*
* 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
#ifdef CONFIG_SILENT_CONSOLE #ifdef CONFIG_SILENT_CONSOLE
if (images->os.os == IH_OS_LINUX) if (images->os.os == IH_OS_LINUX)
fixup_silent_linux(); fixup_silent_linux();
@ -611,6 +588,30 @@ static int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc,
argc = 0; /* consume the args */ 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 */ /* Load the OS */
if (!ret && (states & BOOTM_STATE_LOADOS)) { if (!ret && (states & BOOTM_STATE_LOADOS)) {
ulong load_end; ulong load_end;
@ -674,7 +675,7 @@ static int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc,
char *cmd_list = getenv("fakegocmd"); char *cmd_list = getenv("fakegocmd");
ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO, ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
images, boot_fn, &iflag); images, boot_fn);
if (!ret && cmd_list) if (!ret && cmd_list)
ret = run_command_list(cmd_list, -1, flag); ret = run_command_list(cmd_list, -1, flag);
} }
@ -682,7 +683,7 @@ static int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc,
/* Now run the OS! We hope this doesn't return */ /* Now run the OS! We hope this doesn't return */
if (!ret && (states & BOOTM_STATE_OS_GO)) { if (!ret && (states & BOOTM_STATE_OS_GO)) {
ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO, ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
images, boot_fn, &iflag); images, boot_fn);
if (ret) if (ret)
goto err; goto err;
} }