112 lines
2.7 KiB
ArmAsm
112 lines
2.7 KiB
ArmAsm
/*
|
|
* Copyright (c) 2016 Intel Corporation.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <arch/x86/asm.h>
|
|
|
|
#ifdef CONFIG_SYS_POWER_DEEP_SLEEP
|
|
GDATA(_pm_save_gdtr)
|
|
GDATA(_pm_save_idtr)
|
|
GDATA(_pm_save_esp)
|
|
|
|
GTEXT(_sys_soc_resume_from_deep_sleep)
|
|
GTEXT(_power_restore_cpu_context)
|
|
GTEXT(_power_soc_sleep)
|
|
GTEXT(_power_soc_deep_sleep)
|
|
|
|
SECTION_FUNC(TEXT, save_cpu_context)
|
|
movl %esp, %eax /* save ptr to return address */
|
|
|
|
pushf /* save flags */
|
|
pusha /* save GPRs */
|
|
#if defined (CONFIG_DEBUG) || defined (CONFIG_SOC_WATCH)
|
|
/* save the debug registers */
|
|
movl %dr0, %edx
|
|
pushl %edx
|
|
movl %dr1, %edx
|
|
pushl %edx
|
|
movl %dr2, %edx
|
|
pushl %edx
|
|
movl %dr3, %edx
|
|
pushl %edx
|
|
movl %dr6, %edx
|
|
pushl %edx
|
|
movl %dr7, %edx
|
|
pushl %edx
|
|
#endif
|
|
movl %esp, _pm_save_esp /* save stack ptr */
|
|
sidtl _pm_save_idtr /* save idtr */
|
|
sgdtl _pm_save_gdtr /* save gdtr */
|
|
|
|
pushl (%eax) /* push return address */
|
|
ret
|
|
|
|
SECTION_FUNC(TEXT, _power_restore_cpu_context)
|
|
lgdtl _pm_save_gdtr /* restore gdtr */
|
|
lidtl _pm_save_idtr /* restore idtr */
|
|
movl _pm_save_esp, %esp /* restore saved stack ptr */
|
|
#if defined (CONFIG_DEBUG) || defined (CONFIG_SOC_WATCH)
|
|
/* restore the debug registers */
|
|
popl %edx
|
|
movl %edx, %dr7
|
|
popl %edx
|
|
movl %edx, %dr6
|
|
popl %edx
|
|
movl %edx, %dr3
|
|
popl %edx
|
|
movl %edx, %dr2
|
|
popl %edx
|
|
movl %edx, %dr1
|
|
popl %edx
|
|
movl %edx, %dr0
|
|
#endif
|
|
popa /* restore saved GPRs */
|
|
popf /* restore saved flags */
|
|
|
|
/*
|
|
* At this point the stack contents will be as follows:
|
|
*
|
|
* Saved context
|
|
* ESP ---> Return address of save_cpu_context
|
|
* Return address of _power_soc_sleep/deep_sleep
|
|
*
|
|
* We just popped the saved context. Next we pop out the address
|
|
* of the caller of save_cpu_context.Then the ret would return
|
|
* to caller of _power_soc_sleep or _power_soc_deep_sleep.
|
|
*
|
|
*/
|
|
addl $4, %esp
|
|
ret
|
|
|
|
SECTION_FUNC(TEXT, _power_soc_sleep)
|
|
call save_cpu_context
|
|
wbinvd
|
|
call qm_power_soc_sleep
|
|
/* Does not return */
|
|
|
|
SECTION_FUNC(TEXT, _power_soc_deep_sleep)
|
|
call save_cpu_context
|
|
wbinvd
|
|
call qm_power_soc_deep_sleep
|
|
/* Does not return */
|
|
|
|
/*
|
|
* 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_RESTORE_INFO_RAM_ADDR, %eax
|
|
cmpl $_power_restore_cpu_context, (%eax)
|
|
je _power_restore_cpu_context
|
|
ret
|
|
|
|
#endif
|