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* ARM: Add PSCI supportSascha Hauer2017-02-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch contains the barebox implementation for the ARM "Power State Coordination Interface" (PSCI). The interface is aimed at the generalization of code in the following power management scenarios: * Core idle management. * Dynamic addition and removal of cores, and secondary core boot. * big.LITTLE migration. * System shutdown and reset. In practice, all that's currently implemented is a way to enable the secondary core one some SoCs. With PSCI the Kernel is either started in nonsecure or in Hypervisor mode and PSCI is used to apply power to the secondary cores. The start mode is passed in the global.bootm.secure_state variable. This enum can contain "secure" (Kernel is started in secure mode, means no PSCI), "nonsecure" (Kernel is started in nonsecure mode, PSCI available) or "hyp" (Kernel is started in hyp mode, meaning it can support virtualization). We currently only support putting the secure monitor code into SDRAM, which means we always steal some amount of memory from the Kernel. To keep things simple for now we simply keep the whole barebox binary in memory The PSCI support has been tested on i.MX7 only so far. The only supported operations are CPU_ON and CPU_OFF. The PSCI and secure monitor code is based on the corresponding U-Boot code. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* commands: harmonize in-barebox documentationHolger Schurig2014-05-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch does probably too much, but it's hard (and very cumbersome/time consuming) to break it out. What is does is this: * each command has one short description, e.g. "list MUX configuration" * made sure the short descriptions start lowercase * each command has one usage. That string contains just the options, e.g. "[-npn]". It's not part of the long help text. * that is, it doesn't say "[OPTIONS]" anymore, every usable option is listed by character in this (short) option string (the long description is in the long help text, as before) * help texts have been reworked, to make them - sometimes smaller - sometimes describe the options better - more often present themselves in a nicer format * all long help texts are now created with BUSYBOX_CMD_HELP_ macros, no more 'static const __maybe_unused char cmd_foobar_help[]' * made sure the long help texts starts uppercase * because cmdtp->name and cmdtp->opts together provide the new usage, all "Usage: foobar" texts have been removed from the long help texts * BUSYBOX_CMD_HELP_TEXT() provides the trailing newline by itself, this is nicer in the source code * BUSYBOX_CMD_HELP_OPT() provides the trailing newline by itself * made sure no line gets longer than 77 characters * delibertely renamed cmdtp->usage, so that we can get compile-time errors (e.g. in out-of-tree modules that use register_command() * the 'help' command can now always emit the usage, even without compiled long help texts * 'help -v' gives a list of commands with their short description, this is similar like the old "help" command before my patchset * 'help -a' gives out help of all commands Signed-off-by: Holger Schurig <holgerschurig@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* commands: group 'help' outputHolger Schurig2014-05-141-0/+1
| | | | | | | | | | | | | | | | | | | The old output of "help" was just producing a long list, that usually scrolled of the screen (even on a X11 terminal). This list is more compact, and also sorted by groups. The old output format (plus grouping) is now available with 'help -v'. Example: Information commands: ?, devinfo, help, iomem, meminfo, version Boot commands: boot, bootm, go, loadb, loads, loadx, loady, saves, uimage ... Signed-off-by: Holger Schurig <holgerschurig@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* of: make of_get_fixed_tree more universally usableSascha Hauer2013-01-111-1/+1
| | | | | | | | | | | | | | | | | Currently the bootm code uses of_fix_tree to apply the fixups to the devicetree given on the command line. This function assumes that there is enough space for the fixups available. Also on ARM we have to make sure the tree does not cross 1Mib boundaries. This patch moves the space allocation and alignment ensurance to of_get_fixed_tree and uses it in bootm. This is the first step for making of_get_fixed_tree the single point of devicetree handling in barebox. of_get_fixed_tree now takes an argument of the input fdt. If it is given, this one is used, otherwise an internal oftree is used which will be created in subsequent patches. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* arm lib: Remove redundant boot usage info from boot[uz].cRobert P. J. Day2012-11-191-1/+1
| | | | | | | | There is no need to add the command name to the "usage" info when defining a command. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* commands: remove struct command pointer from commandsSascha Hauer2012-02-271-1/+1
| | | | | | This is unused in all commands and thus can be removed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* ARM boot[zu]: return COMMAND_ERROR_USAGE instead of calling barebox_cmd_usageSascha Hauer2012-02-271-4/+2
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* ARM: call start_linux directly with initrd start/size and oftreeSascha Hauer2011-12-151-1/+7
| | | | | | | whoever calls this function is not necessarily aware of a struct image_data, so remove the dependency from the function. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* ARM: move bootu code to its own fileSascha Hauer2011-04-041-0/+38
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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