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/* SPDX-License-Identifier: GPL-2.0-only */
.code32
#include <cpu/x86/cr.h>
.globl ap_teardown_car
ap_teardown_car:
pop %esi /* return address, don't care */
pop %esi /* flags */
/* chipset_teardown_car() is expected to disable cache-as-ram. */
call chipset_teardown_car
/*
* Check flags requirements (0 = FALSE, 1 = TRUE) :
* bit 0 = ExecWbinvd
* bit 1 = CacheEn
*/
/*
* TODO: Either use or remove this code - we'll node if the code
* is needed when 3 conditions happens:
* 1) This code is in place
* 2) AGESA code that calls HALT_THIS_AP is in place
* 3) We boot to OS, go to S3 and resume.
* If S3 resume fails, this code might be needed, if S3 resume
* is successful then the code can be removed.
*/
/*
* Commented out until defined if needed or not.
* test %esi, 1
* jz 1f
* wbinvd
* 1:
*/
test %esi, 2
jz 2f
/* Enable cache */
mov %cr0, %eax
and $(~(CR0_CD | CR0_NW)), %eax
mov %eax, %cr0
2:
cli
hlt
jmp 2b
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