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/* ***************************************************************************/
/* **/
/* * BIST */
/* **/
/* * GX2 BISTs need to be run before BTB or caches are enabled.*/
/* * BIST result left in registers on failure to be checked with FS2.*/
/* **/
/* ***************************************************************************/
static void
BIST(void){
int msrnum;
msr_t msr;
/* DM*/
msrnum = CPU_DM_CONFIG0;
msr = rdmsr(msrnum);
msr.lo |= DM_CONFIG0_LOWER_DCDIS_SET;
wrmsr(msrnum, msr);
msr.lo = 0x00000003F;
msr.hi = 0x000000000;
msrnum = CPU_DM_BIST;
wrmsr(msrnum, msr);
outb(POST_CPU_DM_BIST_FAILURE, 0x80); /* 0x29*/
msr = rdmsr(msrnum); /* read back for pass fail*/
msr.lo &= 0x0F3FF0000;
if (msr.lo != 0xfeff0000)
goto BISTFail;
msrnum = CPU_DM_CONFIG0;
msr = rdmsr(msrnum);
msr.lo &= ~ DM_CONFIG0_LOWER_DCDIS_SET;
wrmsr(msrnum, msr);
/* FPU*/
msr.lo = 0x000000131;
msr.hi = 0;
msrnum = CPU_FP_UROM_BIST;
wrmsr(msrnum, msr);
outb(POST_CPU_FPU_BIST_FAILURE, 0x80); /* 0x89*/
inb(0x80); /* IO delay*/
msr = rdmsr(msrnum); /* read back for pass fail*/
while ((msr.lo&0x884) != 0x884)
msr = rdmsr(msrnum); /* Endless loop if BIST is broken*/
if ((msr.lo&0x642) != 0x642)
goto BISTFail;
msr.lo = msr.hi = 0; /* clear FPU BIST bits*/
msrnum = CPU_FP_UROM_BIST;
wrmsr(msrnum, msr);
/* BTB*/
msr.lo = 0x000000303;
msr.hi = 0x000000000;
msrnum = CPU_PF_BTBRMA_BIST;
wrmsr(msrnum, msr);
outb(POST_CPU_BTB_BIST_FAILURE , 0x80); /* 0x8A*/
msr = rdmsr(msrnum); /* read back for pass fail*/
if ((msr.lo & 0x3030) != 0x3030)
goto BISTFail;
return;
BISTFail:
print_err("BIST failed!\n");
while(1);
}
/* ***************************************************************************/
/* * cpuRegInit*/
/* ***************************************************************************/
void
cpuRegInit (void){
int msrnum;
msr_t msr;
/* Turn on BTM for early debug based on setup. */
/*if (getnvram( TOKEN_BTM_DIAG_MODE) & 3) {*/
/*
* The following is only for diagnostics mode; do not use for OLPC
*/
if (0) {
/* Set Diagnostic Mode */
msrnum = CPU_GLD_MSR_DIAG;
msr.hi = 0;
msr.lo = DIAG_SEL1_SET | DIAG_SET0_SET;
wrmsr(msrnum, msr);
/* Set up GLCP to grab BTM data.*/
msrnum = 0x04C00000C; /* GLCP_DBGOUT MSR*/
msr.hi = 0x0;
msr.lo = 0x08; /* reset value (SCOPE_SEL = 0) causes FIFO toshift out,*/
wrmsr(msrnum, msr); /* exchange it to anything else to prevent this*/
/* ;Turn off debug clock*/
msrnum = 0x04C000016; /* DBG_CLK_CTL*/
msr.lo = 0x00; /* No clock*/
msr.hi = 0x00;
wrmsr(msrnum, msr);
/* ;Set debug clock to CPU*/
msrnum = 0x04C000016; /* DBG_CLK_CTL*/
msr.lo = 0x01; /* CPU CLOCK*/
msr.hi = 0x00;
wrmsr(msrnum, msr);
/* ;Set fifo ctl to BTM bits wide*/
msrnum = 0x04C00005E; /* FIFO_CTL*/
msr.lo = 0x003880000; /* Bit [25:24] are size (11=BTM, 10 = 64 bit, 01= 32 bit, 00 = 16bit)*/
wrmsr(msrnum, msr); /* Bit [23:21] are position (100 = CPU downto0)*/
/* Bit [19] sets it up in slow data mode.*/
/* ;enable fifo loading - BTM sizing will constrain*/
/* ; only valid BTM packets to load - this action should always be on*/
msrnum = 0x04C00006F; /* GLCP ACTION7 - load fifo*/
msr.lo = 0x00000F000; /* Any nibble all 1's will always trigger*/
msr.hi = 0x000000000; /* */
wrmsr(msrnum, msr);
/* ;start storing diag data in the fifo*/
msrnum = 0x04C00005F; /* DIAG CTL*/
msr.lo = 0x080000000; /* enable actions*/
msr.hi = 0x000000000;
wrmsr(msrnum, msr);
/* Set up delay on data lines, so that the hold time*/
/* is 1 ns.*/
msrnum = 0x04C00000D ; /* GLCP IO DELAY CONTROLS*/
msr.lo = 0x082b5ad68;
msr.hi = 0x080ad6b57; /* RGB delay = 0x07*/
wrmsr(msrnum, msr);
/* Set up DF to output diag information on DF pins.*/
msrnum = DF_GLD_MSR_MASTER_CONF;
msr.lo = 0x0220;
msr.hi = 0;
wrmsr(msrnum, msr);
msrnum = 0x04C00000C ; /* GLCP_DBGOUT MSR*/
msr.hi = 0x0;
msr.lo = 0x0; /* reset value (SCOPE_SEL = 0) causes FIFO to shift out,*/
wrmsr(msrnum, msr);
/* end of code for BTM */
}
/* Enable Suspend on Halt*/
msrnum = CPU_XC_CONFIG;
msr = rdmsr(msrnum);
msr.lo |= XC_CONFIG_SUSP_ON_HLT;
wrmsr(msrnum, msr);
/* ENable SUSP and allow TSC to run in Suspend */
/* to keep speed detection happy*/
msrnum = CPU_BC_CONF_0;
msr = rdmsr(msrnum);
msr.lo |= TSC_SUSP_SET | SUSP_EN_SET;
wrmsr(msrnum, msr);
/* Setup throttling to proper mode if it is ever enabled.*/
msrnum = 0x04C00001E;
msr.hi = 0x000000000;
msr.lo = 0x00000603C;
wrmsr(msrnum, msr);
/* Only do this if we are building for 5535*/
/* */
/* FooGlue Setup*/
/* */
#if 1
/* Enable CIS mode B in FooGlue*/
msrnum = MSR_FG + 0x10;
msr = rdmsr(msrnum);
msr.lo &= ~3;
msr.lo |= 2; /* ModeB*/
wrmsr(msrnum, msr);
#endif
/* */
/* Disable DOT PLL. Graphics init will enable it if needed.*/
/* */
msrnum = GLCP_DOTPLL;
msr = rdmsr(msrnum);
msr.lo |= DOTPPL_LOWER_PD_SET;
wrmsr(msrnum, msr);
/* */
/* Enable RSDC*/
/* */
msrnum = 0x1301 ;
msr = rdmsr(msrnum);
msr.lo |= 0x08;
wrmsr(msrnum, msr);
/* */
/* BIST*/
/* */
/*if (getnvram( TOKEN_BIST_ENABLE) & == TVALUE_DISABLE) {*/
{
// BIST();
}
/* */
/* Enable BTB*/
/* */
/* I hate to put this check here but it doesn't really work in cpubug.asm*/
msrnum = MSR_GLCP+0x17;
msr = rdmsr(msrnum);
if (msr.lo >= CPU_REV_2_1){
msrnum = CPU_PF_BTB_CONF;
msr = rdmsr(msrnum);
msr.lo |= BTB_ENABLE_SET | RETURN_STACK_ENABLE_SET;
wrmsr(msrnum, msr);
}
/* */
/* FPU impercise exceptions bit*/
/* */
/*if (getnvram( TOKEN_FPU_IE_ENABLE) != TVALUE_DISABLE) {*/
{
msrnum = CPU_FPU_MSR_MODE;
msr = rdmsr(msrnum);
msr.lo |= FPU_IE_SET;
wrmsr(msrnum, msr);
}
#if 0
/* */
/* Cache Overides*/
/* */
/* This code disables the data cache. Don't execute this
* unless you're testing something.
*/
/* Allow NVRam to override DM Setup*/
/*if (getnvram( TOKEN_CACHE_DM_MODE) != 1) {*/
{
msrnum = CPU_DM_CONFIG0;
msr = rdmsr(msrnum);
msr.lo |= DM_CONFIG0_LOWER_DCDIS_SET;
wrmsr(msrnum, msr);
}
/* This code disables the instruction cache. Don't execute
* this unless you're testing something.
*/
/* Allow NVRam to override IM Setup*/
/*if (getnvram( TOKEN_CACHE_IM_MODE) ==1) {*/
{
msrnum = CPU_IM_CONFIG;
msr = rdmsr(msrnum);
msr.lo |= IM_CONFIG_LOWER_ICD_SET;
wrmsr(msrnum, msr);
}
#endif
}
/* ***************************************************************************/
/* **/
/* * MTestPinCheckBX*/
/* **/
/* * Set MTEST pins to expected values from OPTIONS.INC/NVRAM*/
/* * This version is called when there isn't a stack available*/
/* **/
/* ***************************************************************************/
static void
MTestPinCheckBX (void){
int msrnum;
msr_t msr;
/*if (getnvram( TOKEN_MTEST_ENABLE) ==TVALUE_DISABLE ) {*/
/* return ; */
/* } */
/* Turn on MTEST*/
msrnum = MC_CFCLK_DBUG;
msr = rdmsr(msrnum);
msr.hi |= CFCLK_UPPER_MTST_B2B_DIS_SET | CFCLK_UPPER_MTEST_EN_SET;
wrmsr(msrnum, msr);
msrnum = GLCP_SYS_RSTPLL /* Get SDR/DDR mode from GLCP*/;
msr = rdmsr(msrnum);
msr.lo >>= RSTPPL_LOWER_SDRMODE_SHIFT;
if (msr.lo & 1) {
msrnum = MC_CFCLK_DBUG; /* Turn on SDR MTEST stuff*/
msr = rdmsr(msrnum);
msr.lo |= CFCLK_LOWER_SDCLK_SET;
msr.hi |= CFCLK_UPPER_MTST_DQS_EN_SET;
wrmsr(msrnum, msr);
}
/* Lock the cache down here.*/
__asm__("wbinvd\n");
}
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