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quark-se: power_mgmt: Add a optional deep sleep resume handler

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Some arduino 101 boards have old boot loader without context
restore boot flow feature. This handler will allow doing deep sleep
in those boards by jumping to the context restore code. This will
be disabled by default and can be optionally enabled by user.

Jira: ZEP-1258
Change-Id: I92e70550fd92c1cac42b3039d667fb0be8cf5bce
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
This commit is contained in:
Ramesh Thomas 2016-11-09 23:29:36 -08:00 • committed by Anas Nashif
commit 24f94ca49e
1 changed files with 18 additions and 0 deletions
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18
arch/x86/soc/intel_quark/quark_se/soc_power.S
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@ -25,6 +25,7 @@ GDATA(_pm_save_esp)
GTEXT(_sys_soc_save_cpu_context)
GTEXT(_sys_soc_restore_cpu_context)
GTEXT(_sys_soc_resume_from_deep_sleep)
SECTION_FUNC(TEXT, _sys_soc_save_cpu_context)
movl %esp, %eax /* save ptr to return address */
@ -64,4 +65,21 @@ SECTION_FUNC(TEXT, _sys_soc_restore_cpu_context)
xorl %eax, %eax
incl %eax
ret
/*
* This is an example function to handle the deep sleep resume notification
* in the absence of bootloader context restore support.
*
* Bootloader in Intel Quark SE Microcontroller C1000 boards have
* context restore support and this would not be required.
*
* Disclaimer: This can be used for debug or development purposes. This is not
* a supported feature in Quark SE boards and to be used at one's own risk.
*/
SECTION_FUNC(TEXT, _sys_soc_resume_from_deep_sleep)
movl $CONFIG_BSP_SHARED_RAM_ADDR, %eax
cmpl $_sys_soc_restore_cpu_context, (%eax)
je _sys_soc_restore_cpu_context
ret
#endif