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cpu/intel/car/cache_as_ram.inc: Remove broken HT code

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Remove Hyperthreading related code that was missing setup of SIPI
vector and did not work.

Change-Id: I27e329a7b667ce4405fe07a637edbc6b5be22f2d
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/21375
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Keith Hui 2017-09-01 17:10:33 -04:00 committed by Kyösti Mälkki
parent b8e325a714
commit 47b283605a
1 changed files with 0 additions and 75 deletions
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75
src/cpu/intel/car/cache_as_ram.inc
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@ -29,81 +29,6 @@
movl %eax, %ebp
CacheAsRam:
/* Check whether the processor has HT capability. */
movl $01, %eax
cpuid
btl $28, %edx
jnc NotHtProcessor
bswapl %ebx
cmpb $01, %bh
jbe NotHtProcessor
/*
* It is a HT processor. Send SIPI to the other logical processor
* within this processor so that the CAR related common system
* registers are programmed accordingly.
*/
/*
* Use some register that is common to both logical processors
* as semaphore. Refer Appendix B, Vol.3.
*/
xorl %eax, %eax
xorl %edx, %edx
movl $MTRR_FIX_64K_00000, %ecx
wrmsr
/*
* Figure out the logical AP's APIC ID; the following logic will
* work only for processors with 2 threads.
* Refer to Vol 3. Table 7-1 for details about this logic.
*/
movl $0xFEE00020, %esi
movl (%esi), %ebx
andl $0xFF000000, %ebx
bswapl %ebx
btl $0, %ebx
jnc LogicalAP0
andb $0xFE, %bl
jmp Send_SIPI
LogicalAP0:
orb $0x01, %bl
Send_SIPI:
bswapl %ebx /* EBX - logical AP's APIC ID. */
/*
* Fill up the IPI command registers in the Local APIC mapped to
* default address and issue SIPI to the other logical processor
* within this processor die.
*/
Retry_SIPI:
movl %ebx, %eax
movl $0xFEE00310, %esi
movl %eax, (%esi)
/* SIPI vector - F900:0000 */
movl $0x000006F9, %eax
movl $0xFEE00300, %esi
movl %eax, (%esi)
movl $0x30, %ecx
SIPI_Delay:
pause
decl %ecx
jnz SIPI_Delay
movl (%esi), %eax
andl $0x00001000, %eax
jnz Retry_SIPI
/* Wait for the Logical AP to complete initialization. */
LogicalAP_SIPINotdone:
movl $MTRR_FIX_64K_00000, %ecx
rdmsr
orl %eax, %eax
jz LogicalAP_SIPINotdone
NotHtProcessor:
/* Set the default memory type and enable fixed and variable MTRRs. */
movl $MTRR_DEF_TYPE_MSR, %ecx
xorl %edx, %edx