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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2005 Eswar Nallusamy, LANL
* Copyright (C) 2005 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
* Copyright (C) 2007 coresystems GmbH
* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
* Copyright (C) 2007 Carl-Daniel Hailfinger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* We will use 4K bytes only */
/* disable HyperThreading is done by eswar*/
/* other's is the same as AMD except remove amd specific msr */
#define CacheSize DCACHE_RAM_SIZE
#define CacheBase (0xd0000 - CacheSize)
#include <cpu/x86/mtrr.h>
/* Save the BIST result */
movl %eax, %ebp
CacheAsRam:
/* hope we can skip the double set for normal part */
#if USE_FALLBACK_IMAGE == 1
// 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 $0x250, %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 $0x250, %ecx
rdmsr
orl %eax, %eax
jz LogicalAP_SIPINotdone
NotHtProcessor:
#if 1
/* Set the default memory type and enable fixed and variable MTRRs */
movl $MTRRdefType_MSR, %ecx
xorl %edx, %edx
/* Enable Variable and Fixed MTRRs */
movl $0x00000c00, %eax
wrmsr
#endif
/*Clear all MTRRs */
xorl %edx, %edx
movl $fixed_mtrr_msr, %esi
clear_fixed_var_mtrr:
lodsl (%esi), %eax
testl %eax, %eax
jz clear_fixed_var_mtrr_out
movl %eax, %ecx
xorl %eax, %eax
wrmsr
jmp clear_fixed_var_mtrr
clear_fixed_var_mtrr_out:
/* 0x06 is the WB IO type for a given 4k segment.
* segs is the number of 4k segments in the area of the particular
* register we want to use for CAR.
* reg is the register where the IO type should be stored.
*/
.macro extractmask segs, reg
.if \segs <= 0
/* The xorl here is superfluous because at the point of first execution
* of this macro, %eax and %edx are cleared. Later invocations of this
* macro will have a monotonically increasing segs parameter.
*/
xorl \reg, \reg
.elseif \segs == 1
movl $0x06000000, \reg
.elseif \segs == 2
movl $0x06060000, \reg
.elseif \segs == 3
movl $0x06060600, \reg
.elseif \segs >= 4
movl $0x06060606, \reg
.endif
.endm
/* size is the cache size in bytes we want to use for CAR.
* windowoffset is the 32k-aligned window into CAR size
*/
.macro simplemask carsize, windowoffset
extractmask (((\carsize - \windowoffset) / 0x1000) - 4), %eax
extractmask (((\carsize - \windowoffset) / 0x1000)), %edx
.endm
#if CacheSize > 0x10000
#error Invalid CAR size, must be at most 64k.
#endif
#if CacheSize < 0x1000
#error Invalid CAR size, must be at least 4k. This is a processor limitation.
#endif
#if (CacheSize & (0x1000 - 1))
#error Invalid CAR size, is not a multiple of 4k. This is a processor limitation.
#endif
#if CacheSize > 0x8000
/* enable caching for 32K-64K using fixed mtrr */
movl $0x268, %ecx /* fix4k_c0000*/
simplemask CacheSize, 0x8000
wrmsr
#endif
/* enable caching for 0-32K using fixed mtrr */
movl $0x269, %ecx /* fix4k_c8000*/
simplemask CacheSize, 0
wrmsr
#else
/* disable cache */
movl %cr0, %eax
orl $(0x1<<30),%eax
movl %eax, %cr0
#endif /* USE_FALLBACK_IMAGE == 1*/
#if defined(XIP_ROM_SIZE) && defined(XIP_ROM_BASE)
/* enable write base caching so we can do execute in place
* on the flash rom.
*/
movl $0x202, %ecx
xorl %edx, %edx
movl $(XIP_ROM_BASE | MTRR_TYPE_WRBACK), %eax
wrmsr
movl $0x203, %ecx
movl $0x0000000f, %edx
movl $(~(XIP_ROM_SIZE - 1) | 0x800), %eax
wrmsr
#endif /* XIP_ROM_SIZE && XIP_ROM_BASE */
/* enable cache */
movl %cr0, %eax
andl $0x9fffffff,%eax
movl %eax, %cr0
#if USE_FALLBACK_IMAGE == 1
/* Read the range with lodsl*/
movl $CacheBase, %esi
cld
movl $(CacheSize>>2), %ecx
rep lodsl
/* Clear the range */
movl $CacheBase, %edi
movl $(CacheSize>>2), %ecx
xorl %eax, %eax
rep stosl
#if 0
/* check the cache as ram */
movl $CacheBase, %esi
movl $(CacheSize>>2), %ecx
.xin1:
movl %esi, %eax
movl %eax, (%esi)
decl %ecx
je .xout1
add $4, %esi
jmp .xin1
.xout1:
movl $CacheBase, %esi
// movl $(CacheSize>>2), %ecx
movl $4, %ecx
.xin1x:
movl %esi, %eax
movl $0x4000, %edx
movb %ah, %al
.testx1:
outb %al, $0x80
decl %edx
jnz .testx1
movl (%esi), %eax
cmpb 0xff, %al
je .xin2 /* dont show */
movl $0x4000, %edx
.testx2:
outb %al, $0x80
decl %edx
jnz .testx2
.xin2: decl %ecx
je .xout1x
add $4, %esi
jmp .xin1x
.xout1x:
#endif
#endif /*USE_FALLBACK_IMAGE == 1*/
movl $(CacheBase+CacheSize-4), %eax
movl %eax, %esp
/* Load a different set of data segments */
#if CONFIG_USE_INIT
movw $CACHE_RAM_DATA_SEG, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %ss
#endif
lout:
/* Restore the BIST result */
movl %ebp, %eax
/* We need to set ebp ? No need */
movl %esp, %ebp
pushl %eax /* bist */
call amd64_main
/* We will not go back */
fixed_mtrr_msr:
.long 0x250, 0x258, 0x259
.long 0x268, 0x269, 0x26A
.long 0x26B, 0x26C, 0x26D
.long 0x26E, 0x26F
var_mtrr_msr:
.long 0x200, 0x201, 0x202, 0x203
.long 0x204, 0x205, 0x206, 0x207
.long 0x208, 0x209, 0x20A, 0x20B
.long 0x20C, 0x20D, 0x20E, 0x20F
.long 0x000 /* NULL, end of table */
#if USE_FALLBACK_IMAGE == 1
.align 0x1000
.code16
.global LogicalAP_SIPI
LogicalAP_SIPI:
// cr0 register is shared among the logical processors;
// so clear CD & NW bits so that the BSP's cr0 register
// controls the cache behavior
// Note: The cache behavior is determined by "OR" result
// of the cr0 registers of the logical processors
movl %cr0, %eax
andl $0x9FFFFFFF, %eax
movl %eax, %cr0
finit
// Set the semaphore to indicate the Logical AP is done
// with CAR specific initialization
movl $0x250, %ecx
movl $0x06, %eax
xorl %edx, %edx
wrmsr
// Halt this AP
cli
Halt_LogicalAP:
hlt
jmp Halt_LogicalAP
.code32
#endif /*USE_FALLBACK_IMAGE == 1*/
.CacheAsRam_out:
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