diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/model_gx2/cpubug.c | 205 |
1 files changed, 95 insertions, 110 deletions
diff --git a/src/cpu/amd/model_gx2/cpubug.c b/src/cpu/amd/model_gx2/cpubug.c index e38bbfbaa3..ccc9dbec16 100644 --- a/src/cpu/amd/model_gx2/cpubug.c +++ b/src/cpu/amd/model_gx2/cpubug.c @@ -90,7 +90,7 @@ pcideadlock(void) * Exit: * Modified: * -/****************************************************************************/ + ****************************************************************************/ void bug784(void) { @@ -150,117 +150,102 @@ void eng1398(void) wrmsr(MC_GLD_MSR_PM, msr); } +/*************************************************************************** + * + * CPUbugIAENG2900 + * + * Clear Quest IAENG00002900, VSS 118.150 + * + * BTB issue causes blue screen in windows, but the fix is required + * for all operating systems. + * + * Entry: + * Exit: + * Modified: + * + **************************************************************************/ void -eng2900(void){ - printk_err(" NOT DOING eng2900: only shown to be a windows problem\n"); -#if 0 +eng2900(void) +{ + msr_t msr; -;************************************************************************** -;* -;* CPUbugIAENG2900 -;* -;* Clear Quest IAENG00002900, VSS 118.150 -;* -;* BTB issue causes blue screen in windows. -;* -;* Entry: -;* Exit: -;* Modified: -;* -;************************************************************************** -CPUbugIAENG2900 PROC NEAR PUBLIC - pushad - -; Clear bit 43, disables the sysenter/sysexit in CPUID3 - mov ecx, 3003h - RDMSR - and edx, 0FFFFF7FFh - WRMSR - - mov cx, TOKEN_BTB_2900_SWAPSIF_ENABLE - NOSTACK bx, GetNVRAMValueBX - cmp ax, TVALUE_ENABLE - jne bug2900exit - - -;Disable enable_actions in DIAGCTL while setting up GLCP - mov ecx, MSR_GLCP + 005fh - xor edx, edx - xor eax, eax - WRMSR - -;Changing DBGCLKCTL register to GeodeLink - mov ecx, MSR_GLCP + 0016h - xor edx, edx - xor eax, eax - WRMSR - - mov ecx, MSR_GLCP + 0016h - xor edx, edx - mov eax, 02h - WRMSR - -;The code below sets up the RedCloud to stall for 4 GeodeLink clocks when CPU is snooped. -;Because setting XSTATE to 0 overrides any other XSTATE action, the code will always -;stall for 4 GeodeLink clocks after a snoop request goes away even if it occured a clock or two -;later than a different snoop; the stall signal will never 'glitch high' for -;only one or two CPU clocks with this code. - -;Send mb0 port 3 requests to upper GeodeLink diag bits [63:32] - mov ecx, MSR_GLIU0 + 2005h - xor edx, edx - mov eax, 80338041h - WRMSR - -;set5m watches request ready from mb0 to CPU (snoop) - mov ecx, MSR_GLCP + 0045h - mov edx, 5ad68000h - xor eax, eax - WRMSR - -;SET4M will be high when state is idle (XSTATE=11) - mov ecx, MSR_GLCP + 0044h - xor edx, edx - mov eax, 0140h - WRMSR - -;SET5n to watch for processor stalled state - mov ecx, MSR_GLCP + 004Dh - mov edx, 2000h - xor eax, eax - WRMSR - -;Writing action number 13: XSTATE=0 to occur when CPU is snooped unless we're stalled - mov ecx, MSR_GLCP + 0075h - xor edx, edx - mov eax, 00400000h - WRMSR - -;Writing action number 11: inc XSTATE every GeodeLink clock unless we're idle - mov ecx, MSR_GLCP + 0073h - xor edx, edx - mov eax, 30000h - WRMSR - - -;Writing action number 5: STALL_CPU_PIPE when exitting idle state or not in idle state - mov ecx, MSR_GLCP + 006Dh - xor edx, edx - mov eax, 00430000h - WRMSR - -;Writing DIAGCTL Register to enable the stall action and to let set5m watch the upper GeodeLink diag bits. - mov ecx, MSR_GLCP + 005fh - xor edx, edx - mov eax, 80004000h - WRMSR - - -bug2900exit: - popad - ret -CPUbugIAENG2900 ENDP -#endif + printk_debug("CPU_BUG:%s\n", __FUNCTION__); + /* Clear bit 43, disables the sysenter/sysexit in CPUID3 */ + msr = rdmsr(0x3003); + msr.hi &= 0xFFFFF7FF; + wrmsr(0x3003, msr); + + /* change this value to zero if you need to disable this BTB SWAPSiF. */ + if (1) { + + /* Disable enable_actions in DIAGCTL while setting up GLCP */ + msr.hi = 0; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x005f, msr); + + /* Changing DBGCLKCTL register to GeodeLink */ + msr.hi = 0; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x0016, msr); + + msr.hi = 0; + msr.lo = 2; + wrmsr(MSR_GLCP + 0x0016, msr); + + /* The code below sets up the CPU to stall for 4 GeodeLink + * clocks when CPU is snooped. Because setting XSTATE to 0 + * overrides any other XSTATE action, the code will always + * stall for 4 GeodeLink clocks after a snoop request goes + * away even if it occured a clock or two later than a + * different snoop; the stall signal will never 'glitch high' + * for only one or two CPU clocks with this code. + */ + + /* Send mb0 port 3 requests to upper GeodeLink diag bits + [63:32] */ + msr.hi = 0; + msr.lo = 0x80338041; + wrmsr(MSR_GLIU0 + 0x2005, msr); + + /* set5m watches request ready from mb0 to CPU (snoop) */ + msr.hi = 0x5ad68000; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x0045, msr); + + /* SET4M will be high when state is idle (XSTATE=11) */ + msr.hi = 0; + msr.lo = 0x0140; + wrmsr(MSR_GLCP + 0x0044, msr); + + /* SET5n to watch for processor stalled state */ + msr.hi = 0x2000; + msr.lo = 0; + wrmsr(MSR_GLCP + 0x004D, msr); + + /* Writing action number 13: XSTATE=0 to occur when CPU is + snooped unless we're stalled */ + msr.hi = 0; + msr.lo = 0x00400000; + wrmsr(MSR_GLCP + 0x0075, msr); + + /* Writing action number 11: inc XSTATE every GeodeLink clock + unless we're idle */ + msr.hi = 0; + msr.lo = 0x30000; + wrmsr(MSR_GLCP + 0x0073, msr); + + /* Writing action number 5: STALL_CPU_PIPE when exitting idle + state or not in idle state */ + msr.hi = 0; + msr.lo = 0x00430000; + wrmsr(MSR_GLCP + 0x006D, msr); + + /* Writing DIAGCTL Register to enable the stall action and to + let set5m watch the upper GeodeLink diag bits. */ + msr.hi = 0; + msr.lo = 0x80004000; + wrmsr(MSR_GLCP + 0x005f, msr); + } } void bug118253(void) |