| /* |
| * Copyright (c) 2011, Advanced Micro Devices, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of Advanced Micro Devices, Inc. nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| /****************************************************************************** |
| * AMD Generic Encapsulated Software Architecture |
| * |
| * $Workfile:: GccCar.inc $Revision:: 32932 $ |
| * |
| * Description: GccCar.inc - AGESA cache-as-RAM setup Include File for GCC complier |
| * |
| ******************************************************************************/ |
| |
| .altmacro |
| |
| BSP_STACK_BASE_ADDR = 0x30000 /* Base address for primary cores stack */ |
| BSP_STACK_SIZE = 0x10000 /* 64KB for BSP core */ |
| CORE0_STACK_BASE_ADDR = 0x80000 /* Base address for primary cores stack */ |
| CORE0_STACK_SIZE = 0x4000 /* 16KB for primary cores */ |
| CORE1_STACK_BASE_ADDR = 0x40000 /* Base address for AP cores */ |
| CORE1_STACK_SIZE = 0x1000 /* 4KB for each AP cores */ |
| |
| APIC_BASE_ADDRESS = 0x0000001B |
| APIC_BSC = 8 /* Boot Strap Core */ |
| |
| AMD_MTRR_VARIABLE_BASE0 = 0x0200 |
| AMD_MTRR_VARIABLE_BASE6 = 0x020C |
| AMD_MTRR_FIX64k_00000 = 0x0250 |
| AMD_MTRR_FIX16k_80000 = 0x0258 |
| AMD_MTRR_FIX16k_A0000 = 0x0259 |
| AMD_MTRR_FIX4k_C0000 = 0x0268 |
| AMD_MTRR_FIX4k_C8000 = 0x0269 |
| AMD_MTRR_FIX4k_D0000 = 0x026A |
| AMD_MTRR_FIX4k_D8000 = 0x026B |
| AMD_MTRR_FIX4k_E0000 = 0x026C |
| AMD_MTRR_FIX4k_E8000 = 0x026D |
| AMD_MTRR_FIX4k_F0000 = 0x026E |
| AMD_MTRR_FIX4k_F8000 = 0x026F |
| |
| /* Reproduced from AGESA.h */ |
| AMD_AP_MTRR_FIX64k_00000 = 0x00000250 |
| AMD_AP_MTRR_FIX16k_80000 = 0x00000258 |
| AMD_AP_MTRR_FIX16k_A0000 = 0x00000259 |
| AMD_AP_MTRR_FIX4k_C0000 = 0x00000268 |
| AMD_AP_MTRR_FIX4k_C8000 = 0x00000269 |
| AMD_AP_MTRR_FIX4k_D0000 = 0x0000026A |
| AMD_AP_MTRR_FIX4k_D8000 = 0x0000026B |
| AMD_AP_MTRR_FIX4k_E0000 = 0x0000026C |
| AMD_AP_MTRR_FIX4k_E8000 = 0x0000026D |
| AMD_AP_MTRR_FIX4k_F0000 = 0x0000026E |
| AMD_AP_MTRR_FIX4k_F8000 = 0x0000026F |
| CPU_LIST_TERMINAL = 0xFFFFFFFF |
| |
| AMD_MTRR_DEFTYPE = 0x02FF |
| WB_DRAM_TYPE = 0x1E /* MemType - memory type */ |
| MTRR_DEF_TYPE_EN = 11 /* MtrrDefTypeEn - variable and fixed MTRRs default enabled */ |
| MTRR_DEF_TYPE_FIX_EN = 10 /* MtrrDefTypeEn - fixed MTRRs default enabled */ |
| |
| HWCR = 0x0C0010015 /* Hardware Configuration */ |
| INVD_WBINVD = 0x04 /* INVD to WBINVD conversion */ |
| |
| IORR_BASE = 0x0C0010016 /* IO Range Regusters Base/Mask, 2 pairs */ |
| /* uses 16h - 19h */ |
| TOP_MEM = 0x0C001001A /* Top of Memory */ |
| TOP_MEM2 = 0x0C001001D /* Top of Memory2 */ |
| |
| LS_CFG = 0x0C0011020 /* Load-Store Configuration */ |
| DIS_SS = 28 /* Family 10h,12h,15h:Disable Streng Store functionality */ |
| DIS_STREAM_ST = 28 /* Family 14h:DisStreamSt - Disable Streaming Store functionality */ |
| |
| IC_CFG = 0x0C0011021 /* Instruction Cache Config Register */ |
| IC_DIS_SPEC_TLB_RLD = 9 /* Disable speculative TLB reloads */ |
| DIS_IND = 14 /* Family 10-14h:Disable Indirect Branch Predictor */ |
| DIS_I_CACHE = 14 /* Family 15h:DisICache - Disable Indirect Branch Predictor */ |
| |
| DC_CFG = 0x0C0011022 /* Data Cache Configuration */ |
| DC_DIS_SPEC_TLB_RLD = 4 /* Disable speculative TLB reloads */ |
| DIS_CLR_WBTOL2_SMC_HIT = 8 /* self modifying code check buffer bit */ |
| DIS_HW_PF = 13 /* Hardware prefetches bit */ |
| |
| DE_CFG = 0x0C0011029 /* Decode Configuration */ |
| CL_FLUSH_SERIALIZE = 23 /* Family 12h,15h: CL Flush Serialization */ |
| |
| BU_CFG2 = 0x0C001102A /* Family 10h: Bus Unit Configuration 2 */ |
| CU_CFG2 = 0x0C001102A /* Family 15h: Combined Unit Configuration 2 */ |
| F10_CL_LINES_TO_NB_DIS = 15 /* ClLinesToNbDis - allows WP code to be cached in L2 */ |
| IC_DIS_SPEC_TLB_WR = 35 /* IcDisSpecTlbWr - ITLB speculative writes */ |
| |
| CU_CFG3 = 0x0C001102B /* Combined Unit Configuration 3 */ |
| COMBINE_CR0_CD = 49 /* Combine CR0.CD for both cores of a compute unit */ |
| |
| |
| CR0_PE = 0 # Protection Enable |
| CR0_NW = 29 # Not Write-through |
| CR0_CD = 30 # Cache Disable |
| CR0_PG = 31 # Paging Enable |
| |
| /* CPUID Functions */ |
| |
| CPUID_MODEL = 1 |
| AMD_CPUID_FMF = 0x80000001 /* Family Model Features information */ |
| AMD_CPUID_APIC = 0x80000008 /* Long Mode and APIC info., core count */ |
| |
| NB_CFG = 0x0C001001F /* Northbridge Configuration Register */ |
| INIT_APIC_ID_CPU_ID_LO = 54 /* InitApicIdCpuIdLo - is core# in high or low half of APIC ID? */ |
| |
| MTRR_SYS_CFG = 0x0C0010010 /* System Configuration Register */ |
| CHX_TO_DIRTY_DIS = 16 /* ChxToDirtyDis Change to dirty disable */ |
| SYS_UC_LOCK_EN = 17 /* SysUcLockEn System lock command enable */ |
| MTRR_FIX_DRAM_EN = 18 /* MtrrFixDramEn MTRR fixed RdDram and WrDram attributes enable */ |
| MTRR_FIX_DRAM_MOD_EN = 19 /* MtrrFixDramModEn MTRR fixed RdDram and WrDram modification enable */ |
| MTRR_VAR_DRAM_EN = 20 /* MtrrVarDramEn MTRR variable DRAM enable */ |
| MTRR_TOM2_EN = 21 /* MtrrTom2En MTRR top of memory 2 enable */ |
| |
| PERF_CONTROL3 = 0x0C0010003 /* Performance event control three */ |
| PERF_CONTROL3_RESERVE_L = 0x00200000 /* Preserve the reserved bits */ |
| PERF_CONTROL3_RESERVE_H = 0x0FCF0 /* Preserve the reserved bits */ |
| CONFIG_EVENT_L = 0x0F0E2 /* All cores with level detection */ |
| CONFIG_EVENT_H = 4 /* Increment count by number of event */ |
| /* occured in clock cycle */ |
| EVENT_ENABLE = 22 /* Enable the event */ |
| PERF_COUNTER3 = 0x0C0010007 /* Performance event counter three */ |
| |
| # Local use flags, in upper most byte if ESI |
| FLAG_UNKNOWN_FAMILY = 24 # Signals that the family# of the installed processor is not recognized |
| FLAG_STACK_REENTRY = 25 # Signals that the environment has made a re-entry (2nd) call to set up the stack |
| FLAG_IS_PRIMARY = 26 # Signals that this core is the primary within the comoute unit |
| |
| CR0_MASK = ((1 << CR0_CD) | (1 << CR0_NW)) |
| MSR_MASK = ((1 << MTRR_DEF_TYPE_EN)+(1 << MTRR_DEF_TYPE_FIX_EN)) |
| |
| /**************************************************************************** |
| * |
| * CPU MACROS - PUBLIC |
| * |
| ****************************************************************************/ |
| .macro _WRMSR |
| .byte 0x0f, 0x30 |
| .endm |
| |
| .macro _RDMSR |
| .byte 0x0F, 0x32 |
| .endm |
| |
| .macro AMD_CPUID arg0 |
| .ifb \arg0 |
| mov $0x1, %eax |
| .byte 0x0F, 0x0A2 /* Execute instruction */ |
| bswap %eax |
| xchg %ah, %al /* Ext model in al now */ |
| rol $0x08, %eax /* Ext model in ah, model in al */ |
| and $0x0FFCF, ax /* Keep 23:16, 7:6, 3:0 */ |
| .else |
| mov \arg0, %eax |
| .byte 0x0F, 0x0A2 |
| .endif |
| .endm |
| |
| /**************************************************************************** |
| * |
| * AMD_ENABLE_STACK_FAMILY_HOOK Macro - Stackless |
| * |
| * Set any family specific controls needed to enable the use of |
| * cache as general storage before main memory is available. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * none |
| ****************************************************************************/ |
| .macro AMD_ENABLE_STACK_FAMILY_HOOK |
| |
| AMD_ENABLE_STACK_FAMILY_HOOK_F10 |
| AMD_ENABLE_STACK_FAMILY_HOOK_F12 |
| AMD_ENABLE_STACK_FAMILY_HOOK_F14 |
| AMD_ENABLE_STACK_FAMILY_HOOK_F15 |
| .endm |
| |
| /**************************************************************************** |
| * |
| * AMD_DISABLE_STACK_FAMILY_HOOK Macro - Stackless |
| * |
| * Return any family specific controls to their 'standard' |
| * settings for using cache with main memory. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * none |
| ****************************************************************************/ |
| .macro AMD_DISABLE_STACK_FAMILY_HOOK |
| |
| AMD_DISABLE_STACK_FAMILY_HOOK_F10 |
| AMD_DISABLE_STACK_FAMILY_HOOK_F12 |
| AMD_DISABLE_STACK_FAMILY_HOOK_F14 |
| AMD_DISABLE_STACK_FAMILY_HOOK_F15 |
| |
| .endm |
| |
| /**************************************************************************** |
| * |
| * GET_NODE_ID_CORE_ID Macro - Stackless |
| * |
| * Read family specific values to determine the node and core |
| * numbers for the core executing this code. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * SI[7:0] = Core# (0..N, relative to node) |
| * SI[15:8]= Node# (0..N) |
| * SI[23:16]= reserved |
| * SI[24]= flag: 1=Family Unrecognized |
| * SI[25]= flag: 1=Interface re-entry call |
| * SI[26]= flag: 1=Core is primary of compute unit |
| * SI[31:27]= reserved, =0 |
| ****************************************************************************/ |
| .macro GET_NODE_ID_CORE_ID |
| LOCAL node_core_exit |
| |
| mov $-1, %si |
| GET_NODE_ID_CORE_ID_F10 |
| GET_NODE_ID_CORE_ID_F12 |
| GET_NODE_ID_CORE_ID_F14 |
| GET_NODE_ID_CORE_ID_F15 |
| /* |
| * Check for unrecognized Family |
| */ |
| cmp $-1, %si # Has family (node/core) already been discovered? |
| jnz node_core_exit # Br if yes |
| |
| mov $((1 << FLAG_UNKNOWN_FAMILY)+(1 << FLAG_IS_PRIMARY)), %esi # No, Set error code, Only let BSP continue |
| |
| mov $APIC_BASE_ADDRESS, %ecx # MSR:0000_001B |
| _RDMSR |
| bt $APIC_BSC, %eax # Is this the BSC? |
| jc node_core_exit # Br if yes |
| hlt # Kill APs |
| node_core_exit: |
| |
| .endm |
| |
| /**************************************************************************** |
| ## Family 10h MACROS |
| ##*************************************************************************** |
| #--------------------------------------------------- |
| # |
| # AMD_ENABLE_STACK_FAMILY_HOOK_F10 Macro - Stackless |
| # |
| # Set any family specific controls needed to enable the use of |
| # cache as general storage before main memory is available. |
| # |
| # Inputs: |
| # ESI - node#, core#, flags from GET_NODE_ID_CORE_ID |
| # Outputs: |
| # none |
| # |
| # Family 10h requirements (BKDG section 2.3.3): |
| # * Paging disabled |
| # * MSRC001_0015[INVDWBINVD]=0 |
| # * MSRC001_1021[DIS_IND]=1 |
| # * MSRC001_1021[DIS_SPEC_TLB_RLD]=1 |
| # * MSRC001_1022[DIS_SPEC_TLB_RLD]=1 |
| # * MSRC001_1022[DIS_CLR_WBTOL2_SMC_HIT]=1 |
| # * MSRC001_1022[DIS_HW_PF]=1 |
| # * MSRC001_102A[IcDisSpecTlbWr]=1 |
| # * MSRC001_102A[ClLinesToNbDis]=1 |
| # * No INVD or WBINVD, no exceptions, page faults or interrupts |
| ****************************************************************************/ |
| .macro AMD_ENABLE_STACK_FAMILY_HOOK_F10 |
| LOCAL fam10_enable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x01, %al # Is this family 10h? |
| jnz fam10_enable_stack_hook_exit # Br if no |
| |
| mov $DC_CFG, %ecx # MSR:C001_1022 |
| _RDMSR |
| bts $DC_DIS_SPEC_TLB_RLD, %eax # Turn on Disable speculative DTLB reloads bit |
| bts $DIS_CLR_WBTOL2_SMC_HIT, %eax # Turn on Disable the self modifying code check buffer bit |
| bts $DIS_HW_PF, %eax # Turn on Disable hardware prefetches bit |
| _WRMSR |
| |
| dec %cx # MSR:C001_1021 |
| _RDMSR |
| bts $IC_DIS_SPEC_TLB_RLD, %eax # Turn on Disable speculative TLB reloads bit |
| bts $DIS_IND, %eax # Turn on Disable indirect branch predictor |
| _WRMSR |
| |
| mov $BU_CFG2, %ecx # MSR C001_102A |
| _RDMSR |
| bts $F10_CL_LINES_TO_NB_DIS, %eax # Allow BIOS ROM to be cached in the IC |
| bts $(IC_DIS_SPEC_TLB_WR-32), %edx #Disable speculative writes to the ITLB |
| _WRMSR |
| |
| mov $HWCR, %ecx # MSR C001_0015 |
| _RDMSR |
| bt $FLAG_STACK_REENTRY, %esi # Check if stack has already been set |
| jc fam10_skipClearingBit4 |
| btr $INVD_WBINVD, %eax # disable INVD -> WBINVD conversion |
| _WRMSR |
| |
| fam10_skipClearingBit4: |
| mov %esi, %eax # load core# |
| or %al, %al # If (BSP) |
| jne fam10_enable_stack_hook_exit |
| mov $PERF_COUNTER3, %ecx # Select performance counter three |
| # to count number of CAR evictions |
| xor %eax, %eax # Initialize the lower part of the counter to zero |
| xor %edx, %edx # Initializa the upper part of the counter to zero |
| _WRMSR # Save it |
| mov $PERF_CONTROL3, %ecx # Select the event control three |
| _RDMSR # Get the current setting |
| and $PERF_CONTROL3_RESERVE_L, %eax # Preserve the reserved bits |
| or $CONFIG_EVENT_L, %eax # Set the lower part of event register to |
| # select CAR Corruption occurred by any cores |
| and $PERF_CONTROL3_RESERVE_H, %dx # Preserve the reserved bits |
| or $CONFIG_EVENT_H, %dx # Set the upper part of event register |
| _WRMSR # Save it |
| bts $EVENT_ENABLE, %eax # Enable it |
| _WRMSR # Save it |
| |
| fam10_enable_stack_hook_exit: |
| .endm |
| |
| /**************************************************************************** |
| * |
| * AMD_DISABLE_STACK_FAMILY_HOOK_F10 Macro - Stackless |
| * |
| * Return any family specific controls to their 'standard' |
| * settings for using cache with main memory. |
| * |
| * Inputs: |
| * ESI - [31:24] flags; [15,8]= Node#; [7,0]= core# |
| * Outputs: |
| * none |
| * |
| * Family 10h requirements: |
| * * INVD or WBINVD |
| * * MSRC001_0015[INVD_WBINVD]=1 |
| * * MSRC001_1021[DIS_IND]=0 |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DIS_CLR_WBTOL2_SMC_HIT]=0 |
| * * MSRC001_1022[DIS_HW_PF]=0 |
| * * MSRC001_102A[IcDisSpecTlbWr]=0 |
| * * MSRC001_102A[ClLinesToNbDis]=0 |
| *****************************************************************************/ |
| |
| .macro AMD_DISABLE_STACK_FAMILY_HOOK_F10 |
| LOCAL fam10_disable_stack_hook_exit |
| |
| AMD_CPUID CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x01, %al # Is this family 10h? |
| jnz fam10_disable_stack_hook_exit # Br if no |
| |
| mov $DC_CFG, %ecx # MSR:C001_1022 |
| _RDMSR |
| btr $DC_DIS_SPEC_TLB_RLD, %eax # Enable speculative TLB reloads |
| btr $DIS_CLR_WBTOL2_SMC_HIT, %eax # Allow self modifying code check buffer |
| btr $DIS_HW_PF, %eax # Allow hardware prefetches |
| _WRMSR |
| |
| dec %cx # MSR:C001_1021 |
| _RDMSR |
| btr $DIS_IND, %eax # Turn on indirect branch predictor |
| btr $IC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative TLB reloads |
| _WRMSR |
| |
| mov $BU_CFG2, %ecx # MSR:C001_102A |
| _RDMSR |
| btr $F10_CL_LINES_TO_NB_DIS, %eax # Return L3 to normal mode |
| btr $(IC_DIS_SPEC_TLB_WR-32), %edx #Re-enable speculative writes to the ITLB |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # Begin critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| mov $HWCR, %ecx # MSR:0000_0015 |
| _RDMSR |
| mov %ax, %bx # Save INVD -> WBINVD bit |
| btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion for the invd instruction. |
| _WRMSR |
| invd # Clear the cache tag RAMs |
| mov %bx, %ax # Restore INVD -> WBINVD bit |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # End critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| mov $PERF_CONTROL3, %ecx # Select the event control three |
| _RDMSR # Retrieve the current value |
| btc $EVENT_ENABLE, %eax # Is event enable, complement it as well |
| jnc fam10_disable_stack_hook_exit # No |
| cmp $CONFIG_EVENT_L, %ax # Is the lower part of event set to capture the CAR Corruption |
| jne fam10_disable_stack_hook_exit # No |
| cmp $CONFIG_EVENT_H, %dl # Is the upper part of event set to capture the CAR Corruption |
| jne fam10_disable_stack_hook_exit # No |
| _WRMSR # Disable the event |
| |
| fam10_disable_stack_hook_exit: |
| .endm |
| |
| /**************************************************************************** |
| * |
| * GET_NODE_ID_CORE_ID_F10 Macro - Stackless |
| * |
| * Read family specific values to determine the node and core |
| * numbers for the core executing this code. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * SI = core#, node# & flags (see GET_NODE_ID_CORE_ID macro above) |
| *****************************************************************************/ |
| .macro GET_NODE_ID_CORE_ID_F10 |
| |
| LOCAL node_core_f10_exit |
| LOCAL node_core_f10_AP |
| |
| cmp $-1, %si # Has node/core already been discovered? |
| jnz node_core_f10_exit # Br if yes |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x01, %al # Is this family 10h? |
| jnz node_core_f10_exit # Br if no |
| |
| xor %esi, %esi # Assume BSC, clear flags |
| mov $APIC_BASE_ADDRESS, %ecx # MSR:0000_001B |
| _RDMSR |
| bt $APIC_BSC, %eax # Is this the BSC? |
| jnc node_core_f10_AP # Br if no |
| |
| # This is the BSP. |
| # Enable routing tables on BSP (just in case the HT init code has not yet enabled them) |
| mov $0x8000C06C, %eax # PCI address for D18F0x6C Link Initialization Control Register |
| mov $0x0CF8, %dx |
| out %eax, %dx |
| add $4, %dx |
| in %dx, %eax |
| btr $0, %eax # Set LinkInitializationControl[RouteTblDis] = 0 |
| out %eax, %dx |
| jmp 1f # |
| |
| node_core_f10_AP: |
| # |
| # This is an AP. Routing tables have been enabled by the HT Init process. |
| # Also, the MailBox register was set by the BSP during early init |
| # The Mailbox register content is formatted as follows: |
| # UINT32 Node:4# // The node id of Core's node. |
| # UINT32 Socket:4# // The socket of this Core's node. |
| # UINT32 Module:2# // The internal module number for Core's node. |
| # UINT32 ModuleType:2# // Single Module = 0, Multi-module = 1. |
| # UINT32 :20# // Reserved |
| # |
| mov $0x0C0000408, %ecx # Read the family 10h mailbox |
| _RDMSR # MC4_MISC1[63:32] |
| mov %dx, %si # SI = raw mailbox contents (will extract node# from this) |
| shr $24, %ebx # BL = CPUID Fn0000_0001_EBX[LocalApicId] |
| mov %bx, %di # DI = Initial APIC ID (will extract core# from this) |
| |
| AMD_CPUID $AMD_CPUID_APIC # |
| shr $4, %ch # CH = ApicIdSize, #bits in APIC ID that show core# |
| inc %cl # CL = Number of enabled cores in the socket |
| mov %cx, %bx |
| |
| mov $NB_CFG, %ecx # MSR:C001_001F |
| _RDMSR # EDX has InitApicIdCpuIdLo bit |
| |
| mov %bh, %cl # CL = APIC ID size |
| mov $1, %al # Convert APIC ID size to an AND mask |
| shl %cl, %al # AL = 2^APIC ID size |
| dec %al # AL = mask for relative core number |
| xor %ah, %ah # AX = mask for relative core number |
| bt $(INIT_APIC_ID_CPU_ID_LO-32), %edx # InitApicIdCpuIdLo == 1? |
| #.if (!carry?) # Br if yes |
| jc 0f |
| mov $8, %ch # Calculate core number shift count |
| sub %cl, %ch # CH = core shift count |
| mov %ch, %cl |
| shr %cl, %di # Right justify core number |
| #.endif |
| 0: |
| and %ax, %di # DI = socket-relative core number |
| |
| mov %si, %cx # CX = raw mailbox value |
| shr $10, %cx # CL[1:0] = ModuleType or #nodes per socket (0-SCM, 1-MCM) |
| and $3, %cl # Isolate ModuleType |
| xor %bh, %bh # BX = Number of enabled cores in the socket |
| shr %cl, %bx # BX = Number of enabled cores per node |
| xor %dx, %dx # Clear upper word for div |
| mov %di, %ax # AX = socket-relative core number |
| div %bx # DX = node-relative core number |
| movzx %si, %eax # prepare return value, [23:16]=shared Core# (=0, not shared) |
| and $0x000F, %ax # AX = node number |
| shl $8, %ax # [15:8]=node# |
| mov %dl, %al # [7:0]=core# (relative to node) |
| mov %eax, %esi # ESI = return value |
| 1: |
| bts $FLAG_IS_PRIMARY, %esi # all Family 10h cores are primary |
| node_core_f10_exit: |
| .endm |
| |
| |
| /***************************************************************************** |
| ** Family 12h MACROS |
| *****************************************************************************/ |
| /***************************************************************************** |
| * |
| * AMD_ENABLE_STACK_FAMILY_HOOK_F12 Macro - Stackless |
| * |
| * Set any family specific controls needed to enable the use of |
| * cache as general storage before main memory is available. |
| * |
| * Inputs: |
| * ESI - node#, core#, flags from GET_NODE_ID_CORE_ID |
| * Outputs: |
| * none |
| * |
| * Family 12h requirements (BKDG section 2.3.3): |
| * The following requirements must be satisfied prior to using the cache as general storage: |
| * * Paging must be disabled. |
| * * MSRC001_0015[INVD_WBINVD]=0 |
| * * MSRC001_1020[DIS_SS]=1 |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=1 |
| * * MSRC001_1022[DIS_SPEC_TLB_RLD]=1 |
| * * MSRC001_1022[DIS_CLR_WBTOL2_SMC_HIT]=1 |
| * * MSRC001_1022[DIS_HW_PF]=1 |
| * * MSRC001_1029[ClflushSerialize]=1 |
| * * No INVD or WBINVD, no exceptions, page faults or interrupts |
| *****************************************************************************/ |
| .macro AMD_ENABLE_STACK_FAMILY_HOOK_F12 |
| LOCAL fam12_enable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x03, %al # Is this family 12h? |
| jnz fam12_enable_stack_hook_exit # Br if no |
| |
| mov $DC_CFG, %ecx # MSR:C001_1022 |
| _RDMSR |
| bts $DC_DIS_SPEC_TLB_RLD, %eax # Disable speculative DC-TLB reloads |
| bts $DIS_CLR_WBTOL2_SMC_HIT, %eax # Disable self modifying code check buffer |
| bts $DIS_HW_PF, %eax # Disable hardware prefetches |
| _WRMSR |
| |
| dec %cx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| bts $IC_DIS_SPEC_TLB_RLD, %eax # Disable speculative IC-TLB reloads |
| _WRMSR |
| |
| dec %cx #LS_CFG # MSR:C001_1020 |
| _RDMSR |
| bts $DIS_SS, %eax # Disabled Streaming store functionality |
| _WRMSR |
| |
| mov $HWCR, %ecx # MSR C001_0015 |
| _RDMSR |
| bt $FLAG_STACK_REENTRY , %esi # Check if stack has already been set |
| jc fam12_skipClearingBit4 |
| btr $INVD_WBINVD, %eax # disable INVD -> WBINVD conversion |
| _WRMSR |
| |
| fam12_skipClearingBit4: |
| mov $DE_CFG, %ecx # MSR:C001_1029 |
| _RDMSR |
| bts $CL_FLUSH_SERIALIZE, %eax # Serialize all CL Flush actions |
| _WRMSR |
| |
| fam12_enable_stack_hook_exit: |
| .endm |
| |
| /***************************************************************************** |
| * |
| * AMD_DISABLE_STACK_FAMILY_HOOK_F12 Macro - Stackless |
| * |
| * Return any family specific controls to their 'standard' |
| * settings for using cache with main memory. |
| * |
| * Inputs: |
| * ESI - [31:24] flags; [15,8]= Node#; [7,0]= core# |
| * Outputs: |
| * none |
| * |
| * Family 12h requirements: |
| * * INVD or WBINVD |
| * * MSRC001_0015[INVD_WBINVD]=1 |
| * * MSRC001_1020[DIS_SS]=0 |
| * * MSRC001_1021[IC_DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DC_DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DIS_CLR_WBTOL2_SMC_HIT]=0 |
| * * MSRC001_1022[DIS_HW_PF]=0 |
| * * MSRC001_1029[ClflushSerialize]=0 |
| *****************************************************************************/ |
| .macro AMD_DISABLE_STACK_FAMILY_HOOK_F12 |
| LOCAL fam12_disable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x03, %al # Is this family 12h? |
| jnz fam12_disable_stack_hook_exit # Br if no |
| |
| mov $DC_CFG, %ecx # MSR:C001_1022 |
| _RDMSR |
| btr $DC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative DC-TLB reloads |
| btr $DIS_CLR_WBTOL2_SMC_HIT, %eax # Enable self modifying code check buffer |
| btr $DIS_HW_PF, %eax # Enable Hardware prefetches |
| _WRMSR |
| |
| dec %cx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| btr $IC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative IC-TLB reloads |
| _WRMSR |
| |
| dec %cx #LS_CFG # MSR:C001_1020 |
| _RDMSR |
| btr $DIS_SS, %eax # Turn on Streaming store functionality |
| _WRMSR |
| |
| mov $DE_CFG, %ecx # MSR:C001_1029 |
| _RDMSR |
| btr $CL_FLUSH_SERIALIZE, %eax |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # Begin critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| mov $HWCR, %ecx # MSR:0000_0015h |
| _RDMSR |
| mov %ax, %bx # Save INVD -> WBINVD bit |
| btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion |
| _WRMSR |
| invd # Clear the cache tag RAMs |
| mov %bx, %ax # Restore INVD -> WBINVD bit |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # End critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| fam12_disable_stack_hook_exit: |
| .endm |
| |
| /***************************************************************************** |
| * |
| * GET_NODE_ID_CORE_ID_F12 Macro - Stackless |
| * |
| * Read family specific values to determine the node and core |
| * numbers for the core executing this code. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * SI = core#, node# & flags (see GET_NODE_ID_CORE_ID macro above) |
| *****************************************************************************/ |
| .macro GET_NODE_ID_CORE_ID_F12 |
| |
| LOCAL node_core_f12_exit |
| |
| cmp $-1, %si # Has node/core already been discovered? |
| jnz node_core_f12_exit # Br if yes |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x03, %al # Is this family 12h? |
| jnz node_core_f12_exit # Br if no |
| |
| shr $24, %ebx # CPUID_0000_0001_EBX[31:24]: initial local APIC physical ID |
| bts $FLAG_IS_PRIMARY, %ebx # all family 12h cores are primary |
| mov %ebx, %esi # ESI = Node#=0, core number |
| node_core_f12_exit: |
| .endm |
| |
| /***************************************************************************** |
| ** Family 14h MACROS |
| *****************************************************************************/ |
| /***************************************************************************** |
| * |
| * AMD_ENABLE_STACK_FAMILY_HOOK_F14 Macro - Stackless |
| * |
| * Set any family specific controls needed to enable the use of |
| * cache as general storage before main memory is available. |
| * |
| * Inputs: |
| * ESI - node#, core#, flags from GET_NODE_ID_CORE_ID |
| * Outputs: |
| * none |
| * |
| * Family 14h requirements (BKDG section 2.3.3): |
| * * Paging must be disabled. |
| * * MSRC001_0015[INVD_WBINVD]=0. |
| * * MSRC001_1020[DisStreamSt]=1. |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=1. Disable speculative ITLB reloads. |
| * * MSRC001_1022[DIS_HW_PF]=1. |
| * * No INVD or WBINVD, no exceptions, page faults or interrupts |
| *****************************************************************************/ |
| .macro AMD_ENABLE_STACK_FAMILY_HOOK_F14 |
| LOCAL fam14_enable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x05, %al # Is this family 14h? |
| jnz fam14_enable_stack_hook_exit # Br if no |
| |
| mov $DC_CFG, %ecx # MSR:C001_1022 |
| _RDMSR |
| bts $DIS_HW_PF, %eax # Disable hardware prefetches |
| _WRMSR |
| |
| dec %cx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| bts $IC_DIS_SPEC_TLB_RLD, %eax # Disable speculative TLB reloads |
| _WRMSR |
| |
| dec %cx #LS_CFG # MSR:C001_1020 |
| _RDMSR |
| bts $DIS_STREAM_ST, %eax # Disabled Streaming store functionality |
| _WRMSR |
| |
| mov $HWCR, %ecx # MSR C001_0015 |
| _RDMSR |
| bt $FLAG_STACK_REENTRY, %esi # Check if stack has already been set |
| jc fam14_skipClearingBit4 |
| btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion |
| _WRMSR |
| fam14_skipClearingBit4: # Keeping this label |
| |
| fam14_enable_stack_hook_exit: |
| .endm |
| |
| /***************************************************************************** |
| * |
| * AMD_DISABLE_STACK_FAMILY_HOOK_F14 Macro - Stackless |
| * |
| * Return any family specific controls to their 'standard' |
| * settings for using cache with main memory. |
| * |
| * Inputs: |
| * ESI - [31:24] flags; [15,8]= Node#; [7,0]= core# |
| * Outputs: |
| * none |
| * |
| * Family 14h requirements: |
| * * INVD or WBINVD |
| * * MSRC001_0015[INVD_WBINVD]=1. |
| * * MSRC001_1020[DisStreamSt]=0. |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=0. |
| * * MSRC001_1022[DIS_HW_PF]=0. |
| *****************************************************************************/ |
| .macro AMD_DISABLE_STACK_FAMILY_HOOK_F14 |
| LOCAL fam14_disable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x05, %al # Is this family 14h? |
| jnz fam14_disable_stack_hook_exit # Br if no |
| |
| mov $LS_CFG, %ecx # MSR:C001_1020 |
| _RDMSR |
| btr $DIS_STREAM_ST, %eax # Turn on Streaming store functionality |
| _WRMSR |
| |
| inc %cx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| btr $IC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative DC-TLB reloads |
| _WRMSR |
| |
| inc %cx #DC_CFG # MSR:C001_1022 |
| _RDMSR |
| btr $DIS_HW_PF, %eax # Turn on hardware prefetches |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # Begin critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| mov $HWCR, %ecx # MSR:C001_0015h |
| _RDMSR |
| btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion |
| _WRMSR |
| invd # Clear the cache tag RAMs |
| bts $INVD_WBINVD, %eax # Turn on Conversion of INVD to WBINVD |
| _WRMSR |
| |
| #-------------------------------------------------------------------------- |
| # End critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| fam14_disable_stack_hook_exit: |
| .endm |
| |
| /***************************************************************************** |
| * |
| * GET_NODE_ID_CORE_ID_F14 Macro - Stackless |
| * |
| * Read family specific values to determine the node and core |
| * numbers for the core executing this code. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * SI = core#, node# & flags (see GET_NODE_ID_CORE_ID macro above) |
| *****************************************************************************/ |
| .macro GET_NODE_ID_CORE_ID_F14 |
| |
| LOCAL node_core_f14_exit |
| |
| cmp $0x-1, %si # Has node/core already been discovered? |
| jnz node_core_f14_exit # Br if yes |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x05, %al # Is this family 14h? |
| jnz node_core_f14_exit # Br if no |
| |
| xor %esi, %esi # Node must be 0 |
| bts $FLAG_IS_PRIMARY, %esi # all family 14h cores are primary |
| mov $APIC_BASE_ADDRESS, %ecx # MSR:0000_001B |
| _RDMSR |
| bt $APIC_BSC, %eax # Is this the BSC? |
| jc node_core_f14_exit # Br if yes |
| inc %si # Set core to 1 |
| node_core_f14_exit: |
| .endm |
| |
| |
| |
| /***************************************************************************** |
| ** Family 15h MACROS |
| *****************************************************************************/ |
| /***************************************************************************** |
| * |
| * AMD_ENABLE_STACK_FAMILY_HOOK_F15 Macro - Stackless |
| * |
| * Set any family specific controls needed to enable the use of |
| * cache as general storage before main memory is available. |
| * |
| * Inputs: |
| * ESI - node#, core#, flags from GET_NODE_ID_CORE_ID |
| * Outputs: |
| * none |
| * |
| * Family 15h requirements (BKDG #42301 section 2.3.3): |
| * * Paging must be disabled. |
| * * MSRC001_0015[INVD_WBINVD]=0 |
| * * MSRC001_1020[DisSS]=1 |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=1 |
| * * MSRC001_1022[DIS_SPEC_TLB_RLD]=1 |
| * * MSRC001_1022[DisHwPf]=1 |
| * * No INVD or WBINVD, no exceptions, page faults or interrupts |
| *****************************************************************************/ |
| .macro AMD_ENABLE_STACK_FAMILY_HOOK_F15 |
| LOCAL fam15_enable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x06, %al # Is this family 15h? |
| jnz fam15_enable_stack_hook_exit # Br if no |
| |
| bt $FLAG_STACK_REENTRY , %esi # Check if stack has already been set |
| jc fam15_skipClearingBit4 |
| mov $HWCR, %ecx # MSR C001_0015 |
| _RDMSR |
| btr $INVD_WBINVD, %eax # disable INVD -> WBINVD conversion |
| _WRMSR |
| |
| fam15_skipClearingBit4: |
| mov $LS_CFG, %ecx # MSR:C001_1020 |
| _RDMSR |
| bts $DIS_SS, %eax # Turn on Streaming store functionality disabled bit |
| _WRMSR |
| |
| inc %ecx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| bts $IC_DIS_SPEC_TLB_RLD, %eax # Turn on Disable speculative IC-TLB reloads bit |
| _WRMSR |
| |
| inc %ecx #DC_CFG # MSR:C001_1022 |
| _RDMSR |
| bts $DC_DIS_SPEC_TLB_RLD, %eax # Turn on Disable speculative DC-TLB reloads bit |
| bts $DIS_HW_PF, %eax # Turn on Disable hardware prefetches bit |
| _WRMSR |
| |
| mov $CU_CFG3, %ecx # MSR:C001_102B |
| _RDMSR |
| btr $(COMBINE_CR0_CD - 32), %edx # Clear CombineCr0Cd bit |
| _WRMSR |
| |
| fam15_enable_stack_hook_exit: |
| .endm |
| |
| |
| /***************************************************************************** |
| * |
| * AMD_DISABLE_STACK_FAMILY_HOOK_F15 Macro - Stackless |
| * |
| * Return any family specific controls to their 'standard' |
| * settings for using cache with main memory. |
| * |
| * Inputs: |
| * ESI - [31:24] flags; [15,8]= Node#; [7,0]= core# |
| * Outputs: |
| * none |
| * |
| * Family 15h requirements: |
| * * INVD or WBINVD |
| * * MSRC001_0015[INVD_WBINVD]=1 |
| * * MSRC001_1020[DisSS]=0 |
| * * MSRC001_1021[DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DIS_SPEC_TLB_RLD]=0 |
| * * MSRC001_1022[DIS_HW_PF]=0 |
| *****************************************************************************/ |
| .macro AMD_DISABLE_STACK_FAMILY_HOOK_F15 |
| LOCAL fam15_disable_stack_hook_exit |
| |
| AMD_CPUID $CPUID_MODEL |
| mov %eax, %ebx # Save revision info to EBX |
| shr $20, %eax # AL = cpu extended family |
| cmp $0x06, %al # Is this family 15h? |
| jnz fam15_disable_stack_hook_exit # Br if no |
| |
| mov $LS_CFG, %ecx # MSR:C001_1020 |
| #.if (ebx != 00600F00h) ; Is this rev A0? |
| cmp $0x00600F00, %ebx |
| jz 0f |
| _RDMSR |
| btr $DIS_SS, %eax # Turn on Streaming store functionality |
| _WRMSR |
| #.endif |
| 0: # End workaround for errata 495 and 496 |
| |
| inc %ecx #IC_CFG # MSR:C001_1021 |
| _RDMSR |
| btr $IC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative TLB reloads |
| _WRMSR |
| |
| inc %ecx #DC_CFG # MSR:C001_1022 |
| _RDMSR |
| btr $DC_DIS_SPEC_TLB_RLD, %eax # Turn on speculative TLB reloads |
| #.if (ebx != 00600F00h) # Is this rev A0? |
| cmp $0x00600F00, %ebx |
| jz 0f |
| btr $DIS_HW_PF, %eax # Turn on hardware prefetches |
| #.endif # End workaround for erratum 498 |
| 0: |
| _WRMSR |
| #-------------------------------------------------------------------------- |
| # Begin critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| bt $FLAG_IS_PRIMARY, %esi |
| #.if (carry?) # Only clear cache from primary core |
| jnc 0f |
| mov $HWCR, %ecx # MSR:C001_0015h |
| _RDMSR |
| btr $INVD_WBINVD, %eax # Disable INVD -> WBINVD conversion |
| _WRMSR |
| invd # Clear the cache tag RAMs |
| bts $INVD_WBINVD, %eax # Turn on Conversion of INVD to WBINVD |
| _WRMSR |
| #.endif # end |
| 0: |
| |
| #-------------------------------------------------------------------------- |
| # End critical sequence in which EAX, BX, ECX, and EDX must be preserved. |
| #-------------------------------------------------------------------------- |
| |
| mov $CU_CFG3, %ecx # MSR:C001_102B |
| _RDMSR |
| bts $(COMBINE_CR0_CD - 32), %edx # Set CombineCr0Cd bit |
| _WRMSR |
| |
| fam15_disable_stack_hook_exit: |
| .endm |
| |
| |
| /***************************************************************************** |
| * |
| * GET_NODE_ID_CORE_ID_F15 Macro - Stackless |
| * |
| * Read family specific values to determine the node and core |
| * numbers for the core executing this code. |
| * |
| * Inputs: |
| * none |
| * Outputs: |
| * SI = core#, node# & flags (see GET_NODE_ID_CORE_ID macro above) |
| *****************************************************************************/ |
| .macro GET_NODE_ID_CORE_ID_F15 |
| |
| LOCAL node_core_f15_exit |
| LOCAL node_core_f15_AP |
| LOCAL node_core_f15_shared |
| |
| cmp $-1, %si # Has node/core already been discovered? |
| jnz node_core_f15_exit # Br if yes |
| |
| AMD_CPUID $CPUID_MODEL |
| shr $20, %eax # AL = cpu extended family |
| cmp $06, %al # Is this family 15h? |
| jnz node_core_f15_exit # Br if no |
| |
| xor %esi, %esi # Assume BSC, clear local flags |
| mov $APIC_BASE_ADDRESS, %ecx # MSR:0000_001B |
| _RDMSR |
| bt $APIC_BSC, %eax # Is this the BSC? |
| jnc node_core_f15_AP # Br if no |
| |
| # This is the BSP. |
| # Enable routing tables on BSP (just in case the HT init code has not yet enabled them) |
| mov $0x8000C06C, %eax # PCI address for D18F0x6C Link Initialization Control Register |
| mov $0x0CF8, %dx |
| out %eax, %dx |
| add $4, %dx |
| in %dx, %eax |
| btr $0, %eax # Set LinkInitializationControl[RouteTblDis] = 0 |
| out %eax, %dx |
| jmp node_core_f15_shared # |
| |
| node_core_f15_AP: |
| # |
| # This is an AP. Routing tables have been enabled by the HT Init process. |
| # Also, the MailBox register was set by the BSP during early init |
| # The Mailbox register content is formatted as follows: |
| # UINT32 Node:4; // The node id of Core's node. |
| # UINT32 Socket:4; // The socket of this Core's node. |
| # UINT32 Module:2; // The internal module number for Core's node. |
| # UINT32 ModuleType:2; // Single Module = 0, Multi-module = 1. |
| # UINT32 :20; // Reserved |
| # |
| mov $0x0C0000408, %ecx # Read the family 15h mailbox |
| _RDMSR # MC4_MISC1[63:32] |
| mov %dx, %si # SI = raw mailbox contents (will extract node# from this) |
| shr $24, %ebx # BL = CPUID Fn0000_0001_EBX[LocalApicId] |
| mov %bx, %di # DI = Initial APIC ID (will extract core# from this) |
| |
| AMD_CPUID $AMD_CPUID_APIC # |
| shr $4, %ch # CH = ApicIdSize, #bits in APIC ID that show core# |
| inc %cl # CL = Number of enabled cores in the socket |
| mov %cx, %bx |
| |
| mov $NB_CFG, %ecx |
| _RDMSR # EDX has InitApicIdCpuIdLo bit |
| |
| mov %bh, %cl # CL = APIC ID size |
| mov $1, %al # Convert APIC ID size to an AND mask |
| shl %cl, %al # AL = 2^APIC ID size |
| dec %al # AL = mask for relative core number |
| xor %ah, %ah # AX = mask for relative core number |
| bt $(INIT_APIC_ID_CPU_ID_LO-32), %edx # InitApicIdCpuIdLo == 1? |
| #.if (!carry?) # Br if yes |
| jc 0f |
| mov $8, %ch # Calculate core number shift count |
| sub %cl, %ch # CH = core shift count |
| mov %ch, %cl |
| shr %cl, %di # Right justify core number |
| #.endif |
| 0: |
| and %ax, %di # DI = socket-relative core number |
| |
| mov %si, %cx # CX = raw mailbox value |
| shr $10, %cx # CL[1:0] = ModuleType or #nodes per socket (0-SCM, 1-MCM) |
| and $3, %cl # Isolate ModuleType |
| xor %bh, %bh # BX = Number of enabled cores in the socket |
| shr %cl, %bx # BX = Number of enabled cores per node |
| xor %dx, %dx # Clear upper word for div |
| mov %di, %ax # AX = socket-relative core number |
| div %bx # DX = node-relative core number |
| movzx %si, %eax # Prepare return value |
| and $0x000F, %ax # AX = node number |
| shl $8,%ax # [15:8]=node# |
| mov %dl, %al # [7:0]=core# (relative to node) |
| mov %eax, %esi # ESI = node-relative core number |
| |
| # |
| # determine if this core shares MTRRs |
| # |
| node_core_f15_shared: |
| mov $0x8000C580, %eax # Compute Unit Status |
| mov %si, %bx |
| shl $3, %bh # Move node# to PCI Dev# field |
| add %bh, %ah # Adjust for node number |
| mov $0x0CF8, %dx |
| out %eax, %dx |
| add $4, %dx |
| in %dx, %eax # [3:0]=Enabled# [19:16]=DualCore |
| |
| # BL is MyCore# |
| mov $0x06, %cx # Use CH as 'first of pair' core# |
| #.while (cl > 0) |
| jmp 0f |
| 8: |
| bt $0, %eax # Is pair enabled? |
| #.if (carry?) # |
| jnc 1f |
| mov $0x01, %bh # flag core as primary |
| bt $16, %eax # Is there a 2nd in the pair? |
| #.if (carry?) # |
| jnc 4f |
| #.break .if (ch == bl) # Does 1st match MyCore#? |
| cmp %bl, %ch |
| je 9f |
| inc %ch |
| xor %bh, %bh # flag core as NOT primary |
| #.break .if (ch == bl) # Does 2nd match MyCore#? |
| cmp %bl, %ch |
| je 9f |
| jmp 2f |
| #.else # No 2nd core |
| 4: |
| #.break .if (ch == bl) # Does 1st match MyCore#? |
| cmp %bl, %ch |
| je 9f |
| #.endif |
| 2: |
| inc %ch |
| #.endif |
| 1: |
| shr $1, %eax |
| dec %cl |
| #.endw |
| 0: |
| #.if (cl == 0) |
| cmp $0x0, %cl |
| ja 8b |
| 9: |
| or %cl, %cl |
| jne 1f |
| #Error - core# didn't match Compute Unit Status content |
| bts $FLAG_UNKNOWN_FAMILY, %esi |
| bts $FLAG_IS_PRIMARY, %esi # Set Is_Primary for unknowns |
| #.endif |
| 1: |
| #.if (bh != 0) # Check state of primary for the matched core |
| or %bh, %bh |
| je 2f |
| bts $FLAG_IS_PRIMARY, %esi # Set shared flag into return value |
| #.endif |
| 2: |
| |
| node_core_f15_exit: |
| |
| .endm |
| |
| /***************************************************************************** |
| * AMD_ENABLE_STACK: Setup a stack |
| * |
| * In: |
| * EBX = Return address (preserved) |
| * |
| * Out: |
| * SS:ESP - Our new private stack location |
| * |
| * EAX = AGESA_STATUS |
| * |
| * ECX = Stack size in bytes |
| * |
| * Requirements: |
| * * This routine presently is limited to a max of 64 processor cores |
| * Preserved: |
| * ebx ebp |
| * Destroyed: |
| * eax, ecx, edx, edi, esi, ds, es, ss, esp |
| * mmx0, mmx1 |
| * |
| * Description: |
| * Fixed MTRR address allocation to cores: |
| * The BSP gets 64K of stack, Core0 of each node gets 16K of stack, all other cores get 4K. |
| * There is a max of 1 BSP, 7 core0s and 56 other cores. |
| * Although each core has it's own cache storage, they share the address space. Each core must |
| * be assigned a private and unique address space for its stack. To support legacy systems, |
| * the stack needs to be within the legacy address space (1st 1Meg). Room must also be reserved |
| * for the other legacy elements (Interrupt vectors, BIOS ROM, video buffer, etc.) |
| * |
| * 80000h 40000h 00000h |
| * +----------+----------+----------+----------+----------+----------+----------+----------+ |
| * 64K | | | | | | | | | 64K ea |
| * ea +----------+----------+----------+----------+----------+----------+----------+----------+ |
| * | MTRR 0000_0250 MTRRfix64K_00000 | |
| * +----------+----------+----------+----------+----------+----------+----------+----------+ |
| * | 7 , 6 | 5 , 4 | 3 , 2 | 1 , 0 | 0 | | | | <-node |
| * |7..1,7..1 |7..1,7..1 |7..1,7..1 |7..1,7..1 | 0 | | | | <-core |
| * +----------+----------+----------+----------+----------+----------+----------+----------+ |
| * |
| * C0000h B0000h A0000h 90000h 80000h |
| * +------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+ |
| *16K | | | | | | | | | | | | | | | | | |
| * ea +------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+ |
| * | MTRR 0259 MTRRfix16K_A0000 | MTRR 0258 MTRRfix16K_80000 | |
| * +------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+ |
| * | > Dis|play B|uffer | < | | | | | 7 | 6 | 5 | 4 | 3 | 2 | 1 | | <-node |
| * | > T| e m |p o r |a r y | B u |f f e |r A |r e a<| 0 | 0 | 0 | 0 | 0 | 0 | 0 | | <-core |
| * +------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+ |
| * |
| * E0000h D0000h C0000h |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * 4K | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4K ea |
| * ea +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * | 026B MTRRfix4K_D8000 | 026A MTRRfix4K_D0000 | 0269 MTRRfix4K_C8000 | 0268 MTRRfix4K_C0000 | |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * | | | | | | | | | | | | | | | | | >| V| I| D| E| O| |B |I |O |S | |A |r |e |a<| |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * |
| * 100000h F0000h E0000h |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4K ea |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * | 026F MTRRfix4K_F8000 | 026E MTRRfix4K_F0000 | 026D MTRRfix4K_E8000 | 026C MTRRfix4K_E0000 | |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| * | >|MA|IN| B|IO|S |RA|NG|E | | | | | | |< | >|EX|TE|ND|ED| B|IO|S |ZO|NE| | | | | |< | |
| * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| *****************************************************************************/ |
| .macro AMD_ENABLE_STACK |
| |
| # These are local labels. Declared so linker doesn't cause 'redefined label' errors |
| LOCAL SetupStack |
| LOCAL Real16bMode |
| LOCAL Protected32Mode |
| LOCAL ClearTheStack |
| |
| # Note that SS:ESP will be default stack. Note that this stack |
| # routine will not be used after memory has been initialized. Because |
| # of its limited lifetime, it will not conflict with typical PCI devices. |
| movd %ebx, %mm0 # Put return address in a safe place |
| movd %ebp, %mm1 # Save some other user registers |
| |
| # get node id and core id of current executing core |
| GET_NODE_ID_CORE_ID # Sets ESI[23:16]=Shared core## SI[15,8]= Node## SI[7,0]= core# (relative to node) |
| # Note: ESI[31:24] are used for flags: Unrecognized Family, Is_Primary core, Stack already established |
| |
| # determine if stack is already enabled. We are using the DefType MSR for this determination. |
| # It is =0 after reset; CAR setup sets it to enable the MTRRs |
| mov %cr0, %eax |
| test $CR0_MASK, %eax # Is cache disabled? (CD & NW bits) |
| jnz SetupStack # Jump if yes |
| mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF |
| _RDMSR |
| test $MSR_MASK, %eax # Are the default types enabled? (MTRR_DEF_TYPE_EN + MTRR_DEF_TYPE_FIX_EN) |
| jz SetupStack # Jump if no |
| or $FLAG_STACK_REENTRY, %esi # Bit25, indicate stack has already been initialized |
| |
| SetupStack: |
| # Set node to map the first 16MB to node 0# 0000_0000 to 00FF_FFFF as DRAM |
| mov %esi, %ebx # Get my Node/Core info |
| xor %bl, %bl |
| shl $3, %bh # Isolate my node#, match alignment for PCI Dev# |
| mov $0x8000C144, %eax # D18F1x44:DRAM Base/Limit# N is Base, N+4 is Limit |
| add %bh, %ah |
| mov %eax, %ebx # Save PCI address for Base/Limit pair |
| |
| mov $0x0CF8, %dx |
| out %eax, %dx |
| add $4, %dx |
| xor %eax, %eax # Least Significant bit is AD24 so 0 sets mask of 00FF_FFFF (16MB) |
| out %eax, %dx # DRAM Limit = node0, no interleave |
| |
| mov %ebx, %eax |
| sub $4, %eax # Now point to the Base register |
| mov $0x0CF8, %dx |
| out %eax, %dx |
| add $4, %dx |
| mov $0x00000003, %eax # Set the read and write enable bits |
| out %eax, %dx # DRAM Base = 0x0000, R/W |
| |
| AMD_ENABLE_STACK_FAMILY_HOOK |
| |
| # Init CPU MSRs for our init routines |
| mov $MTRR_SYS_CFG, %ecx # SYS_CFG |
| _RDMSR |
| bts $MTRR_FIX_DRAM_MOD_EN, %eax # Turn on modification enable bit |
| _WRMSR |
| |
| mov %esi, %eax |
| bt $FLAG_STACK_REENTRY, %eax # Is this a 2nd entry? |
| #.if (!carry?) # On a re-entry, do not clear MTRRs or reset TOM; just reset the stack SS:ESP |
| jc 0f |
| bt $FLAG_IS_PRIMARY, %eax # Is this core the primary in a compute unit? |
| #.if (carry?) # Families using shared groups do not need to clear the MTRRs since that is done at power-on reset |
| # Note: Relying on MSRs to be cleared to 0's at reset for families w/shared cores |
| # Clear all variable and Fixed MTRRs for non-shared cores |
| jnc 0f |
| mov $AMD_MTRR_VARIABLE_BASE0, %ecx |
| xor %eax, %eax |
| xor %edx, %edx |
| #.while (cl != 10h) # Variable MTRRphysBase[n] and MTRRphysMask[n] |
| jmp 1f |
| 2: |
| _WRMSR |
| inc %cl |
| #.endw |
| 1: |
| cmp $0x10, %cl |
| jne 2b |
| mov $AMD_MTRR_FIX64k_00000, %cx # MSR:0000_0250 |
| _WRMSR |
| mov $AMD_MTRR_FIX16k_80000, %cx # MSR:0000_0258 |
| _WRMSR |
| mov $AMD_MTRR_FIX16k_A0000, %cx # MSR:0000_0259 |
| _WRMSR |
| mov $AMD_MTRR_FIX4k_C0000, %cx # Fixed 4Ks: MTRRfix4K_C0000 to MTRRfix4K_F8000 |
| #.while (cl != 70h) |
| jmp 3f |
| 4: |
| _WRMSR |
| inc %cl |
| #.endw |
| 3: |
| cmp $0x70, %cl |
| jne 4b |
| # Set TOP_MEM (C001_001A) for non-shared cores to 16M. This will be increased at heap init. |
| # - not strictly needed since the FixedMTRRs take presedence. |
| mov $(16 * 1024 * 1024), %eax |
| mov $TOP_MEM, %ecx # MSR:C001_001A |
| _WRMSR |
| #.endif # End Is_Primary |
| #.endif # End Stack_ReEntry |
| 0: |
| # Clear IORRs (C001_0016-19) and TOM2(C001_001D) for all cores |
| xor %eax, %eax |
| xor %edx, %edx |
| mov $IORR_BASE, %ecx # MSR:C001_0016 - 0019 |
| #.while (cl != 1Ah) |
| jmp 1f |
| 2: |
| _WRMSR |
| inc %cl |
| #.endw |
| 1: |
| cmp $0x1A, %cl |
| jne 2b |
| mov $TOP_MEM2, %ecx # MSR:C001_001D |
| _WRMSR |
| |
| # setup MTTRs for stacks |
| # A speculative read can be generated by a speculative fetch mis-aligned in a code zone |
| # or due to a data zone being interpreted as code. When a speculative read occurs outside a |
| # controlled region (intentionally used by software), it could cause an unwanted cache eviction. |
| # To prevent speculative reads from causing an eviction, the unused cache ranges are set |
| # to UC type. Only the actively used regions (stack, heap) are reflected in the MTRRs. |
| # Note: some core stack regions will share an MTRR since the control granularity is much |
| # larger than the allocated stack zone. The allocation algorithm must account for this 'extra' |
| # space covered by the MTRR when parseling out cache space for the various uses. In some cases |
| # this could reduce the amount of EXE cache available to a core. see cpuCacheInit.c |
| # |
| # Outcome of this block is that: (Note the MTRR map at the top of the file) |
| # ebp - start address of stack block |
| # ebx - [31:16] - MTRR MSR address |
| # - [15:8] - slot# in MTRR register |
| # - [7:0] - block size in #4K blocks |
| # review: ESI[31:24]=Flags; SI[15,8]= Node#; SI[7,0]= core# (relative to node) |
| # |
| |
| mov %si, %ax # Load node, core |
| #.if (al == 0) # Is a core 0? |
| or %al, %al |
| jne 1f |
| #.if (ah == 0) # Is Node 0? (BSP) |
| or %ah, %ah |
| jne 2f |
| # Is BSP, assign a 64K stack |
| mov $((AMD_MTRR_FIX64k_00000 << 16) + (3 << 8) + (BSP_STACK_SIZE / 0x1000)), %ebx |
| mov $BSP_STACK_BASE_ADDR, %ebp |
| jmp 0f |
| #.else # node 1 to 7, core0 |
| 2: |
| # Is a Core0 of secondary node, assign 16K stacks |
| mov $AMD_MTRR_FIX16k_80000, %bx |
| shl $16, %ebx # |
| mov %ah, %bh # Node# is used as slot# |
| mov $(CORE0_STACK_SIZE / 0x1000), %bl |
| mov %ah, %al # Base = (Node# * Size)# |
| mul %bl # |
| movzx %ax, %eax # |
| shl $12, %eax # Expand back to full byte count (* 4K) |
| add $CORE0_STACK_BASE_ADDR, %eax |
| mov %eax, %ebp |
| #.endif |
| jmp 0f |
| #.else #core 1 thru core 7 |
| 1: |
| # Is core 1-7 of any node, assign 4K stacks |
| mov $8, %al # CoreIndex = ( (Node# * 8) ... |
| mul %ah # |
| mov %si, %bx # |
| add %bl, %al # ... + Core#)# |
| |
| mov $AMD_MTRR_FIX64k_00000, %bx |
| shl $16, %ebx # |
| mov %al, %bh # Slot# = (CoreIndex / 16) + 4# |
| shr $4, %bh # |
| add $4, %bh # |
| mov $(CORE1_STACK_SIZE / 0x1000), %bl |
| |
| mul %bl # Base = ( (CoreIndex * Size) ... |
| movzx %ax, %eax # |
| shl $12, %eax # Expand back to full byte count (* 4K) |
| add $CORE1_STACK_BASE_ADDR, %eax # ... + Base_Addr)# |
| mov %eax, %ebp |
| #.endif |
| 0: |
| |
| # Now set the MTRR. Add this to already existing settings (don't clear any MTRR) |
| mov $WB_DRAM_TYPE, %edi # Load Cache type in 1st slot |
| mov %bh, %cl # ShiftCount = ((slot# ... |
| and $0x03, %cl # ... % 4) ... |
| shl $0x03, %cl # ... * 8)# |
| shl %cl, %edi # Cache type is now in correct position |
| ror $16, %ebx # Get the MTRR address |
| movzx %bx, %ecx # |
| rol $16, %ebx # Put slot# & size back in BX |
| _RDMSR # Read-modify-write the MSR |
| #.if (bh < 4) # Is value in lower or upper half of MSR? |
| cmp $4, %bh |
| jae 1f |
| or %edi, %eax # |
| jmp 0f |
| #.else |
| 1: # |
| or %edi, %edx # |
| #.endif # |
| 0: |
| _WRMSR # |
| |
| # Enable MTRR defaults as UC type |
| mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF |
| _RDMSR # Read-modify-write the MSR |
| bts $MTRR_DEF_TYPE_EN, %eax # MtrrDefTypeEn |
| bts $MTRR_DEF_TYPE_FIX_EN, %eax # MtrrDefTypeFixEn |
| _WRMSR |
| |
| # Close the modification window on the Fixed MTRRs |
| mov $MTRR_SYS_CFG, %ecx # MSR:0C001_0010 |
| _RDMSR |
| bts $MTRR_FIX_DRAM_EN, %eax # MtrrFixDramEn |
| bts $MTRR_VAR_DRAM_EN, %eax # variable MTRR enable bit |
| btr $MTRR_FIX_DRAM_MOD_EN, %eax # Turn off modification enable bit |
| _WRMSR |
| |
| # Enable caching in CR0 |
| mov %cr0, %eax # Enable WT/WB cache |
| btr $CR0_PG, %eax # Make sure paging is disabled |
| btr $CR0_CD, %eax # Clear CR0 NW and CD |
| btr $CR0_NW, %eax |
| mov %eax, %cr0 |
| |
| # Use the Stack Base & size to calculate SS and ESP values |
| # review: |
| # esi[31:24]=Flags; esi[15,8]= Node#; esi[7,0]= core# (relative to node) |
| # ebp - start address of stack block |
| # ebx - [31:16] - MTRR MSR address |
| # - [15:8] - slot# in MTRR register |
| # - [7:0] - block size in #4K blocks |
| # |
| mov %ebp, %esp # Initialize the stack pointer |
| mov %esp, %edi # Copy the stack start to edi |
| movzx %bl, %bx |
| movzx %bx, %ebx # Clear upper ebx, don't need MSR addr anymore |
| shl $12, %ebx # Make size full byte count (* 4K) |
| add %ebx, %esp # Set the Stack Pointer as full linear address |
| sub $4, %esp |
| # |
| # review: |
| # esi[31:24]=Flags; esi[15,8]= Node#; esi[7,0]= core# (relative to node) |
| # edi - 32b start address of stack block |
| # ebx - size of stack block |
| # esp - 32b linear stack pointer |
| # |
| |
| # Determine mode for SS base; |
| mov %cr0, %ecx # Check for 32-bit protect mode |
| bt $CR0_PE, %ecx # |
| #.if (!carry?) # PE=0 means real mode |
| jc Protected32Mode |
| mov %cs, %cx # PE=1 |
| cmp $0x0D000, %cx # Check for CS |
| jb Protected32Mode # If CS < D000, it is a selector instead of a segment |
| # alter SS:ESP for 16b Real Mode: |
| Real16bMode: |
| mov %edi, %eax |
| shr $4, %eax # Create a Real Mode segment for ss, ds, es |
| mov %ax, %ss |
| mov %ax, %ds |
| mov %ax, %es |
| shl $4, %eax |
| sub %eax, %edi # Adjust the clearing pointer for Seg:Offset mode |
| mov %ebx, %esp # Make SP an offset from SS |
| sub $4, %esp # |
| # .endif # endif |
| # #else |
| # Default is to use Protected 32b Mode |
| #.endif |
| ; |
| Protected32Mode: |
| # |
| # Clear The Stack |
| # Now that we have set the location and the MTRRs, initialize the cache by |
| # reading then writing to zero all of the stack area. |
| # review: |
| # ss - Stack base |
| # esp - stack pointer |
| # ebx - size of stack block |
| # esi[31:24]=Flags; esi[15,8]= Node#; esi[7,0]= core# (relative to node) |
| # edi - address of start of stack block |
| # |
| |
| ClearTheStack: # Stack base is in SS, stack pointer is in ESP |
| shr $2, %ebx # ebx = stack block size in dwords |
| mov %bx, %cx # |
| # Check our flags - Don't clear an existing stack |
| #.if ( !(esi & 0FF000000h)) # Check our flags |
| test $(1 << FLAG_STACK_REENTRY), %esi |
| jne 1f |
| cld |
| mov %edi, %esi |
| rep lodsl (%esi) # Pre-load the range |
| xor %eax, %eax |
| mov %bx, %cx |
| mov %edi, %esi # Preserve base for push on stack |
| rep stosl (%edi) # Clear the range |
| movl $0x0ABCDDCBA, (%esp) # Put marker in top stack dword |
| shl $2, %ebx # Put stack size and base |
| push %ebx # in top of stack |
| push %esi |
| |
| mov %ebx, %ecx # Return size of stack in bytes |
| xor %eax, %eax # eax = 0 : no error return code |
| jmp 0f |
| #.else |
| 1: |
| movzx %cx, %ecx |
| shl $2, %ecx # Return size of stack in bytes |
| mov %esi, %eax |
| shr $24, %eax # Keep the flags as part of the error report |
| or $0x40000000, %eax # eax = AGESA_WARNING (Stack has already been set up) |
| #.endif |
| 0: |
| |
| movd %mm0, %ebx # Restore return address |
| movd %mm1, %ebp |
| .endm |
| |
| /***************************************************************************** |
| * AMD_DISABLE_STACK: Destroy the stack inside the cache. This routine |
| * should only be executed on the BSP |
| * |
| * In: |
| * none |
| * |
| * Out: |
| * EAX = AGESA_SUCCESS |
| * |
| * Preserved: |
| * ebx |
| * Destroyed: |
| * eax, ecx, edx, esp |
| *****************************************************************************/ |
| .macro AMD_DISABLE_STACK |
| |
| mov %ebx, %esp # Save return address |
| |
| # get node/core/flags of current executing core |
| GET_NODE_ID_CORE_ID # Sets ESI[15,8]= Node#; ESI[7,0]= core# (relative to node) |
| |
| # Turn on modification enable bit |
| mov $MTRR_SYS_CFG, %ecx # MSR:C001_0010 |
| _RDMSR |
| bts $MTRR_FIX_DRAM_MOD_EN, %eax # Enable modifications |
| _WRMSR |
| |
| # Set lower 640K MTRRs for Write-Back memory caching |
| mov $AMD_MTRR_FIX64k_00000, %ecx |
| mov $0x1E1E1E1E, %eax |
| mov %eax, %edx |
| _WRMSR # 0 - 512K = WB Mem |
| mov $AMD_MTRR_FIX16k_80000, %ecx |
| _WRMSR # 512K - 640K = WB Mem |
| |
| # Turn off modification enable bit |
| mov $MTRR_SYS_CFG, %ecx # MSR:C001_0010 |
| _RDMSR |
| btr $MTRR_FIX_DRAM_MOD_EN, %eax # Disable modification |
| _WRMSR |
| |
| AMD_DISABLE_STACK_FAMILY_HOOK # Re-Enable 'normal' cache operations |
| |
| mov %esp, %ebx |
| xor %eax, %eax |
| |
| .endm |
| |
