diff options
Diffstat (limited to 'src/vendorcode/amd/agesa/f14/Proc/CPU/cahaltasm.S')
| -rw-r--r-- | src/vendorcode/amd/agesa/f14/Proc/CPU/cahaltasm.S | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/vendorcode/amd/agesa/f14/Proc/CPU/cahaltasm.S b/src/vendorcode/amd/agesa/f14/Proc/CPU/cahaltasm.S new file mode 100644 index 0000000000..48ee5d0238 --- /dev/null +++ b/src/vendorcode/amd/agesa/f14/Proc/CPU/cahaltasm.S @@ -0,0 +1,203 @@ +/* + * 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. + * + */ + +.include "src/vendorcode/amd/agesa/f14/gcccar.inc" + +.code32 +.align 4 +.globl ExecuteFinalHltInstruction + .type ExecuteFinalHltInstruction, @function +/* ExecuteFinalHltInstruction ( + IN UINT32 HaltFlags, + IN AP_MTRR_SETTINGS *ApMtrrSettingsList, + IN AMD_CONFIG_PARAMS *StdHeader + ) +*/ + +/* This function disables CAR. We don't care about the stack on this CPU */ +ExecuteFinalHltInstruction: + movl 4(%esp), %esi /* HaltFlags*/ + movl 8(%esp), %edi /* ApMtrrSettingList */ + +/* Do these special steps in case if the core is part of a compute unit + * Note: The following bits are family specific flags, that gets set during build time, + * and indicates things like "family cache control methodology", etc. + * esi bit0 = 0 -> not a Primary core + * esi bit0 = 1 -> Primary core + * esi bit1 = 0 -> Cache disable + * esi bit1 = 1 -> Cache enable + */ + + bt $1, %esi /* .if (esi & 2h) */ + jz 0f + /* Set CombineCr0Cd bit */ + movl $CU_CFG3, %ecx + rdmsr + bts $(COMBINE_CR0_CD - 32), %edx + wrmsr + /* Clear the CR0.CD bit */ + movl %cr0, %eax /* Make sure cache is enabled for all APs */ + btr $CR0_CD, %eax + btr $CR0_NW, %eax + mov %eax, %cr0 /* Write back to CR0 */ + jmp 1f /* .else */ +0: + movl %cr0, %eax /* Make sure cache is disabled for all APs */ + bts $CR0_CD, %eax /* Disable cache */ + bts $CR0_NW, %eax + movl %eax, %cr0 /* Write back to CR0 */ +1: /* .endif */ + + bt $0, %esi /* .if (esi & 1h) */ + jz 2f + /* This core is a primary core and needs to do all the MTRRs, including shared MTRRs. */ + movl %edi, %esi /* Get ApMtrrSettingList */ + + /* Configure the MTRRs on the AP so + * when it runs remote code it will execute + * out of RAM instead of ROM. + */ + + /* Disable MTRRs and turn on modification enable bit */ + movl $MTRR_SYS_CFG, %ecx + rdmsr + btr $MTRR_VAR_DRAM_EN, %eax /* Disable */ + bts $MTRR_FIX_DRAM_MOD_EN, %eax /* Enable */ + btr $MTRR_FIX_DRAM_EN, %eax /* Disable */ + bts $SYS_UC_LOCK_EN, %eax + wrmsr + + /* Setup default values for Fixed-Sized MTRRs */ + /* Set 7FFFh-00000h as WB */ + movl $AMD_AP_MTRR_FIX64k_00000, %ecx + movl $0x1E1E1E1E, %eax + movl %eax, %edx + wrmsr + + /* Set 9FFFFh-80000h also as WB */ + movl $AMD_AP_MTRR_FIX16k_80000, %ecx + wrmsr + + /* Set BFFFFh-A0000h as Uncacheable Memory-mapped IO */ + movl $AMD_AP_MTRR_FIX16k_A0000, %ecx + xorl %eax, %eax + xorl %edx, %edx + wrmsr + + /* Set DFFFFh-C0000h as Uncacheable Memory-mapped IO */ + xorl %eax, %eax + xorl %edx, %edx + movl $AMD_AP_MTRR_FIX4k_C0000, %ecx + +CDLoop: + wrmsr + inc %ecx + cmp $AMD_AP_MTRR_FIX4k_D8000, %ecx + jbe CDLoop + + /* Set FFFFFh-E0000h as Uncacheable Memory */ + movl $0x18181818, %eax + movl %eax, %edx + + mov $AMD_AP_MTRR_FIX4k_E0000, %ecx + +EFLoop: + wrmsr + inc %ecx + cmp $AMD_AP_MTRR_FIX4k_F8000, %ecx + jbe EFLoop + + /* If IBV provided settings for Fixed-Sized MTRRs, + * overwrite the default settings. */ + cmp $0, %esi /*.if ((esi != 0) && (esi != 0FFFFFFFFh)) */ + jz 4f + cmp $0xFFFFFFFF, %esi + jz 4f + 5: + mov (%esi), %ecx /* (AP_MTRR_SETTINGS ptr [esi]).MsrAddr */ + /* While we are not at the end of the list */ + cmp $CPU_LIST_TERMINAL, %ecx /* .while (ecx != CPU_LIST_TERMINAL)*/ + je 4f + /* TODO - coreboot isn't checking for valid data. + * Ensure that the MSR address is valid for Fixed-Sized MTRRs */ + /*.if ( ((ecx >= AMD_AP_MTRR_FIX4k_C0000) && (ecx <= AMD_AP_MTRR_FIX4k_F8000)) || \ + (ecx == AMD_AP_MTRR_FIX64k_00000) || (ecx == AMD_AP_MTRR_FIX16k_80000 ) || \ + (ecx == AMD_AP_MTRR_FIX16k_A0000)) + */ + mov 4(%esi), %eax /* MsrData */ + mov 8(%esi), %edx /* MsrData */ + wrmsr + /* .endif */ + add $12, %esi /* sizeof (AP_MTRR_SETTINGS) */ + jmp 5b /* .endw */ + 4: /* .endif */ + + /* restore variable MTTR6 and MTTR7 to default states */ + movl $AMD_MTRR_VARIABLE_BASE6, %ecx /* clear MTRRPhysBase6 MTRRPhysMask6 */ + xor %eax, %eax /* and MTRRPhysBase7 MTRRPhysMask7 */ + xor %edx, %edx + cmp $10, %ecx /* .while (cl < 010h) */ + jge 6f + wrmsr + inc %ecx + 6: /* .endw */ + + /* Enable fixed-range and variable-range MTRRs */ + mov $AMD_MTRR_DEFTYPE, %ecx + rdmsr + bts $MTRR_DEF_TYPE_EN, %eax /* MtrrDefTypeEn */ + bts $MTRR_DEF_TYPE_FIX_EN, %eax /* MtrrDefTypeFixEn */ + wrmsr + + /* Enable Top-of-Memory setting */ + /* Enable use of RdMem/WrMem bits attributes */ + mov $MTRR_SYS_CFG, %ecx + rdmsr + bts $MTRR_VAR_DRAM_EN, %eax /* Enable */ + btr $MTRR_FIX_DRAM_MOD_EN, %eax /* Disable */ + bts $MTRR_FIX_DRAM_EN, %eax /* Enable */ + wrmsr + + bts $FLAG_IS_PRIMARY, %esi + jmp 3f /* .else ; end if primary core */ + 2: + xor %esi, %esi + 3: /* .endif*/ + + /* Make sure not to touch any Shared MSR from this point on */ + + AMD_DISABLE_STACK_FAMILY_HOOK + + xor %eax, %eax + +7: + cli + hlt + jmp 7b /* ExecuteHltInstruction */ + + .size ExecuteFinalHltInstruction, .-ExecuteFinalHltInstruction |