2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Advanced Micro Devices, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <northbridge/amd/amdht/AsPsDefs.h>
23 static inline void print_debug_fv(const char *str, u32 val)
25 #if CONFIG_SET_FIDVID_DEBUG
26 printk(BIOS_DEBUG, "%s%x\n", str, val);
30 static inline void print_debug_fv_8(const char *str, u8 val)
32 #if CONFIG_SET_FIDVID_DEBUG
33 printk(BIOS_DEBUG, "%s%02x\n", str, val);
37 static inline void print_debug_fv_64(const char *str, u32 val, u32 val2)
39 #if CONFIG_SET_FIDVID_DEBUG
40 printk(BIOS_DEBUG, "%s%x%x\n", str, val, val2);
48 static void enable_fid_change(u8 fid)
57 for (i = 0; i < nodes; i++) {
59 dword = pci_read_config32(dev, 0xd4);
61 dword |= (u32) fid & 0x1F;
62 dword |= 1 << 5; // enable
63 pci_write_config32(dev, 0xd4, dword);
64 printk(BIOS_DEBUG, "FID Change Node:%02x, F3xD4: %08x \n", i,
69 static void setVSRamp(device_t dev) {
70 /* BKDG r31116 2010-04-22 2.4.1.7 step b F3xD8[VSRampTime]
71 * If this field accepts 8 values between 10 and 500 us why
72 * does page 324 say "BIOS should set this field to 001b."
74 * Shouldn't it depend on the voltage regulators, mainboard
78 dword = pci_read_config32(dev, 0xd8);
80 dword |= VSRAMP_VALUE;
81 pci_write_config32(dev, 0xd8, dword);
84 static void recalculateVsSlamTimeSettingOnCorePre(device_t dev)
87 u8 highVoltageVid, lowVoltageVid, bValue;
89 u16 vSlamTimes[7] = { 1000, 2000, 3000, 4000, 6000, 10000, 20000 }; /* Reg settings scaled by 100 */
93 /* This function calculates the VsSlamTime using the range of possible
94 * voltages instead of a hardcoded 200us.
95 * Note:This function is called from setFidVidRegs and setUserPs after
96 * programming a custom Pstate.
99 /* Calculate Slam Time
100 * Vslam = 0.4us/mV * Vp0 - (lowest out of Vpmin or Valt)
101 * In our case, we will scale the values by 100 to avoid
105 /* Determine if this is a PVI or SVI system */
106 dtemp = pci_read_config32(dev, 0xA0);
108 if (dtemp & PVI_MODE)
113 /* Get P0's voltage */
114 msr = rdmsr(0xC0010064);
115 highVoltageVid = (u8) ((msr.lo >> PS_CPU_VID_SHFT) & 0x7F);
117 /* If SVI, we only care about CPU VID.
118 * If PVI, determine the higher voltage b/t NB and CPU
121 bValue = (u8) ((msr.lo >> PS_NB_VID_SHFT) & 0x7F);
122 if (highVoltageVid > bValue)
123 highVoltageVid = bValue;
126 /* Get Pmin's index */
127 msr = rdmsr(0xC0010061);
128 bValue = (u8) ((msr.lo >> PS_CUR_LIM_SHFT) & BIT_MASK_3);
131 msr = rdmsr(0xC0010064 + bValue);
132 lowVoltageVid = (u8) ((msr.lo >> PS_CPU_VID_SHFT) & 0x7F);
134 /* If SVI, we only care about CPU VID.
135 * If PVI, determine the higher voltage b/t NB and CPU
138 bValue = (u8) ((msr.lo >> PS_NB_VID_SHFT) & 0x7F);
139 if (lowVoltageVid > bValue)
140 lowVoltageVid = bValue;
144 dtemp = pci_read_config32(dev, 0xDC);
145 bValue = (u8) (dtemp & BIT_MASK_7);
147 /* Use the VID with the lowest voltage (higher VID) */
148 if (lowVoltageVid < bValue)
149 lowVoltageVid = bValue;
151 /* If Vids are 7Dh - 7Fh, force 7Ch to keep calculations linear */
152 if (lowVoltageVid > 0x7C) {
153 lowVoltageVid = 0x7C;
154 if (highVoltageVid > 0x7C)
155 highVoltageVid = 0x7C;
158 bValue = (u8) (lowVoltageVid - highVoltageVid);
160 /* Each Vid increment is 12.5 mV. The minimum slam time is:
161 * vidCodeDelta * 12.5mV * 0.4us/mV
162 * Scale by 100 to avoid decimals.
164 minimumSlamTime = bValue * (125 * 4);
166 /* Now round up to nearest register setting.
167 * Note that if we don't find a value, we
168 * will fall through to a value of 7
170 for (bValue = 0; bValue < 7; bValue++) {
171 if (minimumSlamTime <= vSlamTimes[bValue])
175 /* Apply the value */
176 dtemp = pci_read_config32(dev, 0xD8);
177 dtemp &= VSSLAM_MASK;
179 pci_write_config32(dev, 0xd8, dtemp);
182 static u32 nb_clk_did(int node, u32 cpuRev,u8 procPkg) {
185 if (AMD_CpuFindCapability(node, 0, &offset)) {
186 link0isGen3 = (AMD_checkLinkType(node, 0, offset) & HTPHY_LINKTYPE_HT3 );
188 /* FIXME: NB_CLKDID should be 101b for AMD_DA_C2 in package
189 S1g3 in link Gen3 mode, but I don't know how to tell
190 package S1g3 from S1g4 */
191 if ((cpuRev & AMD_DA_C2) && (procPkg & AMD_PKGTYPE_S1gX)
193 return 5 ; /* divide clk by 128*/
195 return 4 ; /* divide clk by 16 */
200 static u32 power_up_down(int node, u8 procPkg) {
202 /* from CPU rev guide #41322 rev 3.74 June 2010 Table 26 */
203 u8 singleLinkFlag = ((procPkg == AMD_PKGTYPE_AM3_2r2)
204 || (procPkg == AMD_PKGTYPE_S1gX)
205 || (procPkg == AMD_PKGTYPE_ASB2));
207 if (singleLinkFlag) {
209 * PowerStepUp=01000b - 50nS
210 * PowerStepDown=01000b - 50ns
212 dword |= PW_STP_UP50 | PW_STP_DN50;
214 u32 dispRefModeEn = (pci_read_config32(NODE_PCI(node,0),0x68) >> 24) & 1;
217 for(j=0 ; (j<4) && (!isocEn) ; j++ ) {
219 if (AMD_CpuFindCapability(node, j, &offset)) {
220 isocEn = (pci_read_config32(NODE_PCI(node,0),offset+4) >>12) & 1;
224 if (dispRefModeEn || isocEn) {
225 dword |= PW_STP_UP50 | PW_STP_DN50 ;
227 /* get number of cores for PowerStepUp & PowerStepDown in server
228 1 core - 400nS - 0000b
229 2 cores - 200nS - 0010b
230 3 cores - 133nS -> 100nS - 0011b
231 4 cores - 100nS - 0011b
233 switch (get_core_num_in_bsp(node)) {
235 dword |= PW_STP_UP400 | PW_STP_DN400;
239 dword |= PW_STP_UP200 | PW_STP_DN200;
242 dword |= PW_STP_UP100 | PW_STP_DN100;
245 dword |= PW_STP_UP100 | PW_STP_DN100;
253 static void config_clk_power_ctrl_reg0(int node, u32 cpuRev, u8 procPkg) {
254 device_t dev = NODE_PCI(node, 3);
256 /* Program fields in Clock Power/Control register0 (F3xD4) */
258 /* set F3xD4 Clock Power/Timing Control 0 Register
259 * NbClkDidApplyAll=1b
260 * NbClkDid=100b or 101b
261 * PowerStepUp= "platform dependent"
262 * PowerStepDown= "platform dependent"
264 * ClkRampHystCtl=HW default
265 * ClkRampHystSel=1111b
267 u32 dword= pci_read_config32(dev, 0xd4);
269 dword |= NB_CLKDID_ALL | LNK_PLL_LOCK | CLK_RAMP_HYST_SEL_VAL;
270 dword |= (nb_clk_did(node,cpuRev,procPkg) << NB_CLKDID_SHIFT);
272 dword |= power_up_down(node, procPkg);
274 pci_write_config32(dev, 0xd4, dword);
278 static void config_power_ctrl_misc_reg(device_t dev,u32 cpuRev, u8 procPkg) {
280 u32 dword = pci_read_config32(dev, 0xA0);
282 /* BKDG r31116 2010-04-22 2.4.1.7 step b F3xA0[VSSlamVidMod] */
283 /* PllLockTime and PsiVidEn set in ruleset in defaults.h */
284 if (dword & PVI_MODE) { /* PVI */
285 /* set slamVidMode to 0 for PVI */
286 dword &= VID_SLAM_OFF ;
288 /* set slamVidMode to 1 for SVI */
289 dword |= VID_SLAM_ON;
293 /* Program F3xD8[PwrPlanes] according F3xA0[DulaVdd] */
294 dword = pci_read_config32(dev, 0xD8);
296 if (dtemp & DUAL_VDD_BIT)
299 dword &= PWR_PLN_OFF;
300 pci_write_config32(dev, 0xD8, dword);
304 /* set the rest of A0 since we're at it... */
306 if (cpuRev & (AMD_DA_Cx | AMD_RB_C3 )) {
307 dword |= NB_PSTATE_FORCE_ON;
308 } // else should we clear it ?
311 if ((procPkg == AMD_PKGTYPE_G34) || (procPkg == AMD_PKGTYPE_C32) ) {
312 dword |= BP_INS_TRI_EN_ON ;
315 /* TODO: look into C1E state and F3xA0[IdleExitEn]*/
316 #if CONFIG_SVI_HIGH_FREQ
317 if (cpuRev & AMD_FAM10_C3) {
318 dword |= SVI_HIGH_FREQ_ON;
321 pci_write_config32(dev, 0xA0, dword);
324 static void config_nb_syn_ptr_adj(device_t dev, u32 cpuRev) {
325 /* Note the following settings are additional from the ported
326 * function setFidVidRegs()
328 /* adjust FIFO between nb and core clocks to max allowed
329 values (min latency) */
330 u32 nbPstate = pci_read_config32(dev,0x1f0) & NB_PSTATE_MASK;
332 if ((cpuRev & (AMD_DR_Bx|AMD_DA_Cx) )
333 || ( (cpuRev & AMD_RB_C3) && (nbPstate!=0))) {
339 u32 dword = pci_read_config32(dev, 0xDc);
340 dword &= ~ NB_SYN_PTR_ADJ_MASK;
341 dword |= nbSynPtrAdj << NB_SYN_PTR_ADJ_POS;
342 /* NbsynPtrAdj set to 5 or 6 per BKDG (needs reset) */
343 pci_write_config32(dev, 0xdc, dword);
346 static void config_acpi_pwr_state_ctrl_regs(device_t dev, u32 cpuRev, u8 procPkg) {
347 /* step 1, chapter 2.4.2.6 of AMD Fam 10 BKDG #31116 Rev 3.48 22.4.2010 */
350 if (cpuRev & (AMD_DR_Bx)) {
351 // will coreboot ever enable cache scrubbing ?
352 // if it does, will it be enough to check the current state
353 // or should we configure for what we'll set up later ?
354 dword = pci_read_config32(dev, 0x58);
355 u32 scrubbingCache = dword &
356 ( (0x1F << 16) // DCacheScrub
357 | (0x1F << 8) ); // L2Scrub
358 if (scrubbingCache) {
363 } else { // rev C or later
364 // same doubt as cache scrubbing: ok to check current state ?
365 dword = pci_read_config32(dev, 0xDC);
366 u32 cacheFlushOnHalt = dword & (7 << 16);
367 if (!cacheFlushOnHalt) {
371 dword = (c1 << 24) | (0xE641E6);
372 pci_write_config32(dev, 0x84, dword);
375 /* FIXME: BKDG Table 100 says if the link is at a Gen1
376 frequency and the chipset does not support a 10us minimum LDTSTOP
377 assertion time, then { If ASB2 && SVI then smaf001 = F6h else
378 smaf001=87h. } else ... I hardly know what it means or how to check
379 it from here, so I bluntly assume it is false and code here the else,
383 if (cpuRev & AMD_DR_Bx ) {
386 #if CONFIG_SVI_HIGH_FREQ
387 if (cpuRev & (AMD_RB_C3 | AMD_DA_C3)) {
392 u32 fidvidChange = 0;
393 if (((cpuRev & AMD_DA_Cx) && (procPkg & AMD_PKGTYPE_S1gX))
394 || (cpuRev & AMD_RB_C3) ) {
397 dword = (0xE6 << 24) | (fidvidChange << 16)
398 | (smaf001 << 8) | 0x81;
399 pci_write_config32(dev, 0x80, dword);
402 static void prep_fid_change(void)
409 /* This needs to be run before any Pstate changes are requested */
413 for (i = 0; i < nodes; i++) {
414 printk(BIOS_DEBUG, "Prep FID/VID Node:%02x \n", i);
415 dev = NODE_PCI(i, 3);
416 u32 cpuRev = mctGetLogicalCPUID(0xFF) ;
417 u8 procPkg = mctGetProcessorPackageType();
420 /* BKDG r31116 2010-04-22 2.4.1.7 step b F3xD8[VSSlamTime] */
421 /* Figure out the value for VsSlamTime and program it */
422 recalculateVsSlamTimeSettingOnCorePre(dev);
424 config_clk_power_ctrl_reg0(i,cpuRev,procPkg);
426 config_power_ctrl_misc_reg(dev,cpuRev,procPkg);
427 config_nb_syn_ptr_adj(dev,cpuRev);
429 config_acpi_pwr_state_ctrl_regs(dev,cpuRev,procPkg);
431 dword = pci_read_config32(dev, 0x80);
432 printk(BIOS_DEBUG, " F3x80: %08x \n", dword);
433 dword = pci_read_config32(dev, 0x84);
434 printk(BIOS_DEBUG, " F3x84: %08x \n", dword);
435 dword = pci_read_config32(dev, 0xD4);
436 printk(BIOS_DEBUG, " F3xD4: %08x \n", dword);
437 dword = pci_read_config32(dev, 0xD8);
438 printk(BIOS_DEBUG, " F3xD8: %08x \n", dword);
439 dword = pci_read_config32(dev, 0xDC);
440 printk(BIOS_DEBUG, " F3xDC: %08x \n", dword);
446 static void waitCurrentPstate(u32 target_pstate){
447 msr_t initial_msr = rdmsr(TSC_MSR);
448 msr_t pstate_msr = rdmsr(CUR_PSTATE_MSR);
452 /* paranoia ? I fear when we run fixPsNbVidBeforeWR we can enter a
453 * P1 that is a copy of P0, therefore has the same NB DID but the
454 * TSC will count twice per tick, so we have to wait for twice the
455 * count to achieve the desired timeout. But I'm likely to
456 * misunderstand this...
458 u32 corrected_timeout = ( (pstate_msr.lo==1)
459 && (!(rdmsr(0xC0010065).lo & NB_DID_M_ON)) ) ?
460 WAIT_PSTATE_TIMEOUT*2 : WAIT_PSTATE_TIMEOUT ;
463 timeout.lo = initial_msr.lo + corrected_timeout ;
464 timeout.hi = initial_msr.hi;
465 if ( (((u32)0xffffffff) - initial_msr.lo) < corrected_timeout ) {
469 // assuming TSC ticks at 1.25 ns per tick (800 MHz)
471 pstate_msr = rdmsr(CUR_PSTATE_MSR);
472 tsc_msr = rdmsr(TSC_MSR);
473 timedout = (tsc_msr.hi > timeout.hi)
474 || ((tsc_msr.hi == timeout.hi) && (tsc_msr.lo > timeout.lo ));
475 } while ( (pstate_msr.lo != target_pstate) && (! timedout) ) ;
477 if (pstate_msr.lo != target_pstate) {
478 msr_t limit_msr = rdmsr(0xc0010061);
479 printk(BIOS_ERR, "*** Time out waiting for P-state %01x. Current P-state %01x P-state current limit MSRC001_0061=%02x\n", target_pstate, pstate_msr.lo, limit_msr.lo);
481 do { // should we just go on instead ?
482 pstate_msr = rdmsr(CUR_PSTATE_MSR);
483 } while ( pstate_msr.lo != target_pstate ) ;
487 static void set_pstate(u32 nonBoostedPState) {
490 // Transition P0 for calling core.
491 msr = rdmsr(0xC0010062);
493 msr.lo = nonBoostedPState;
494 wrmsr(0xC0010062, msr);
496 /* Wait for P0 to set. */
497 waitCurrentPstate(nonBoostedPState);
503 static void UpdateSinglePlaneNbVid(void)
509 /* copy higher voltage (lower VID) of NBVID & CPUVID to both */
510 for (i = 0; i < 5; i++) {
511 msr = rdmsr(PS_REG_BASE + i);
512 nbVid = (msr.lo & PS_CPU_VID_M_ON) >> PS_CPU_VID_SHFT;
513 cpuVid = (msr.lo & PS_NB_VID_M_ON) >> PS_NB_VID_SHFT;
515 if (nbVid != cpuVid) {
519 msr.lo = msr.lo & PS_BOTH_VID_OFF;
520 msr.lo = msr.lo | (u32) ((nbVid) << PS_NB_VID_SHFT);
521 msr.lo = msr.lo | (u32) ((nbVid) << PS_CPU_VID_SHFT);
522 wrmsr(PS_REG_BASE + i, msr);
527 static void fixPsNbVidBeforeWR(u32 newNbVid, u32 coreid, u32 dev, u8 pviMode)
532 /* This function sets NbVid before the warm reset.
533 * Get StartupPstate from MSRC001_0071.
534 * Read Pstate register pointed by [StartupPstate].
535 * and copy its content to P0 and P1 registers.
536 * Copy newNbVid to P0[NbVid].
537 * transition to P1 on all cores,
538 * then transition to P0 on core 0.
539 * Wait for MSRC001_0063[CurPstate] = 000b on core 0.
540 * see BKDG rev 3.48 2.4.2.9.1 BIOS NB COF and VID Configuration
541 * for SVI and Single-Plane PVI Systems
544 msr = rdmsr(0xc0010071);
545 startup_pstate = (msr.hi >> (32 - 32)) & 0x07;
547 /* Copy startup pstate to P1 and P0 MSRs. Set the maxvid for
548 * this node in P0. Then transition to P1 for corex and P0
549 * for core0. These setting will be cleared by the warm reset
551 msr = rdmsr(0xC0010064 + startup_pstate);
552 wrmsr(0xC0010065, msr);
553 wrmsr(0xC0010064, msr);
555 /* missing step 2 from BDKG , F3xDC[PstateMaxVal] =
556 * max(1,F3xDC[PstateMaxVal] ) because it would take
557 * synchronization between cores and we don't think
558 * PstatMaxVal is going to be 0 on cold reset anyway ?
560 if ( ! (pci_read_config32(dev, 0xDC) & (~ PS_MAX_VAL_MASK)) ) {
561 printk(BIOS_ERR,"F3xDC[PstateMaxVal] is zero. Northbridge voltage setting will fail. fixPsNbVidBeforeWR in fidvid.c needs fixing. See AMD # 31116 rev 3.48 BKDG 2.4.2.9.1 \n");
564 msr.lo &= ~0xFE000000; // clear nbvid
565 msr.lo |= (newNbVid << 25);
566 wrmsr(0xC0010064, msr);
568 if (pviMode) { /* single plane*/
569 UpdateSinglePlaneNbVid();
572 // Transition to P1 for all APs and P0 for core0.
579 /* missing step 7 (restore PstateMax to 0 if needed) because
585 static u32 needs_NB_COF_VID_update(void)
587 u8 nb_cof_vid_update;
591 /* If any node has nb_cof_vid_update set all nodes need an update. */
593 nb_cof_vid_update = 0;
594 for (i = 0; i < nodes; i++) {
595 u32 cpuRev = mctGetLogicalCPUID(i) ;
596 u32 nbCofVidUpdateDefined = (cpuRev & (AMD_FAM10_LT_D));
597 if (nbCofVidUpdateDefined
598 && (pci_read_config32(NODE_PCI(i, 3), 0x1FC)
599 & NB_COF_VID_UPDATE_MASK)) {
600 nb_cof_vid_update = 1;
604 return nb_cof_vid_update;
607 static u32 init_fidvid_core(u32 nodeid, u32 coreid)
612 u8 nb_cof_vid_update = needs_NB_COF_VID_update();
616 /* Steps 1-6 of BIOS NB COF and VID Configuration
617 * for SVI and Single-Plane PVI Systems. BKDG 2.4.2.9 #31116 rev 3.48
620 dev = NODE_PCI(nodeid, 3);
621 pvimode = pci_read_config32(dev, PW_CTL_MISC) & PVI_MODE;
622 reg1fc = pci_read_config32(dev, 0x1FC);
624 if (nb_cof_vid_update) {
625 vid_max = (reg1fc & SINGLE_PLANE_NB_VID_MASK ) >> SINGLE_PLANE_NB_VID_SHIFT ;
626 fid_max = (reg1fc & SINGLE_PLANE_NB_FID_MASK ) >> SINGLE_PLANE_NB_FID_SHIFT ;
628 if (!pvimode) { /* SVI, dual power plane */
629 vid_max = vid_max - ((reg1fc & DUAL_PLANE_NB_VID_OFF_MASK ) >> DUAL_PLANE_NB_VID_SHIFT );
630 fid_max = fid_max + ((reg1fc & DUAL_PLANE_NB_FID_OFF_MASK ) >> DUAL_PLANE_NB_FID_SHIFT );
632 /* write newNbVid to P-state Reg's NbVid always if NbVidUpdatedAll=1 */
633 fixPsNbVidBeforeWR(vid_max, coreid,dev,pvimode);
635 /* fid setup is handled by the BSP at the end. */
637 } else { /* ! nb_cof_vid_update */
640 UpdateSinglePlaneNbVid();
643 return ((nb_cof_vid_update << 16) | (fid_max << 8));
647 static void init_fidvid_ap(u32 bsp_apicid, u32 apicid, u32 nodeid, u32 coreid)
651 printk(BIOS_DEBUG, "FIDVID on AP: %02x\n", apicid);
653 send = init_fidvid_core(nodeid,coreid);
654 send |= (apicid << 24); // ap apicid
656 // Send signal to BSP about this AP max fid
657 // This also indicates this AP is ready for warm reset (if required).
658 lapic_write(LAPIC_MSG_REG, send | F10_APSTATE_RESET);
661 static u32 calc_common_fid(u32 fid_packed, u32 fid_packed_new)
666 fidmax = (fid_packed >> 8) & 0xFF;
668 fidmax_new = (fid_packed_new >> 8) & 0xFF;
670 if (fidmax > fidmax_new) {
674 fid_packed &= 0xFF << 16;
675 fid_packed |= (fidmax << 8);
676 fid_packed |= fid_packed_new & (0xFF << 16); // set nb_cof_vid_update
681 static void init_fidvid_bsp_stage1(u32 ap_apicid, void *gp)
686 struct fidvid_st *fvp = gp;
689 print_debug_fv("Wait for AP stage 1: ap_apicid = ", ap_apicid);
693 if (lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback) != 0)
695 if ((readback & 0x3f) == 1) {
697 break; /* target ap is in stage 1 */
702 printk(BIOS_DEBUG, "%s: timed out reading from ap %02x\n",
703 __func__, ap_apicid);
707 print_debug_fv("\treadback = ", readback);
709 fvp->common_fid = calc_common_fid(fvp->common_fid, readback);
711 print_debug_fv("\tcommon_fid(packed) = ", fvp->common_fid);
715 static void fixPsNbVidAfterWR(u32 newNbVid, u8 NbVidUpdatedAll,u8 pviMode)
721 /* BKDG 2.4.2.9.1 11-12
722 * This function copies newNbVid to NbVid bits in P-state
723 * Registers[4:0] if its NbDid bit=0, and IddValue!=0 in case of
724 * NbVidUpdatedAll =0 or copies newNbVid to NbVid bits in
725 * P-state Registers[4:0] if its IddValue!=0 in case of
726 * NbVidUpdatedAll=1. Then transition to StartPstate.
729 /* write newNbVid to P-state Reg's NbVid if its NbDid=0 */
730 for (i = 0; i < 5; i++) {
731 msr = rdmsr(0xC0010064 + i);
732 /* NbDid (bit 22 of P-state Reg) == 0 or NbVidUpdatedAll = 1 */
733 if ( (msr.hi & PS_IDD_VALUE_MASK)
734 && (msr.hi & PS_EN_MASK)
735 &&(((msr.lo & PS_NB_DID_MASK) == 0) || NbVidUpdatedAll)) {
736 msr.lo &= PS_NB_VID_M_OFF;
737 msr.lo |= (newNbVid & 0x7F) << PS_NB_VID_SHFT;
738 wrmsr(0xC0010064 + i, msr);
742 /* Not documented. Would overwrite Nb_Vids just copied
743 * should we just update cpu_vid or nothing at all ?
745 if (pviMode) { //single plane
746 UpdateSinglePlaneNbVid();
748 /* For each core in the system, transition all cores to StartupPstate */
749 msr = rdmsr(0xC0010071);
750 StartupPstate = msr.hi & 0x07;
752 /* Set and wait for StartupPstate to set. */
753 set_pstate(StartupPstate);
757 static void finalPstateChange(void)
759 /* Enble P0 on all cores for best performance.
760 * Linux can slow them down later if need be.
761 * It is safe since they will be in C1 halt
762 * most of the time anyway.
767 static void init_fidvid_stage2(u32 apicid, u32 nodeid)
774 u8 nb_cof_vid_update = needs_NB_COF_VID_update();
778 /* After warm reset finish the fid/vid setup for all cores. */
780 /* If any node has nb_cof_vid_update set all nodes need an update. */
782 dev = NODE_PCI(nodeid, 3);
783 pvimode = (pci_read_config32(dev, 0xA0) >> 8) & 1;
784 reg1fc = pci_read_config32(dev, 0x1FC);
785 nbvid = (reg1fc >> 7) & 0x7F;
786 NbVidUpdateAll = (reg1fc >> 1) & 1;
788 if (nb_cof_vid_update) {
789 if (!pvimode) { /* SVI */
790 nbvid = nbvid - ((reg1fc >> 17) & 0x1F);
792 /* write newNbVid to P-state Reg's NbVid if its NbDid=0 */
793 fixPsNbVidAfterWR(nbvid, NbVidUpdateAll,pvimode);
794 } else { /* !nb_cof_vid_update */
796 UpdateSinglePlaneNbVid();
798 dtemp = pci_read_config32(dev, 0xA0);
799 dtemp &= PLLLOCK_OFF;
800 dtemp |= PLLLOCK_DFT_L;
801 pci_write_config32(dev, 0xA0, dtemp);
805 /* Set TSC to tick at the P0 ndfid rate */
812 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST
813 struct ap_apicid_st {
815 // it could use 256 bytes for 64 node quad core system
816 u8 apicid[NODE_NUMS * 4];
819 static void store_ap_apicid(unsigned ap_apicid, void *gp)
821 struct ap_apicid_st *p = gp;
823 p->apicid[p->num++] = ap_apicid;
829 static int init_fidvid_bsp(u32 bsp_apicid, u32 nodes)
831 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST
832 struct ap_apicid_st ap_apicidx;
837 printk(BIOS_DEBUG, "FIDVID on BSP, APIC_id: %02x\n", bsp_apicid);
839 /* Steps 1-6 of BIOS NB COF and VID Configuration
840 * for SVI and Single-Plane PVI Systems.
843 fv.common_fid = init_fidvid_core(0,0);
845 print_debug_fv("BSP fid = ", fv.common_fid);
847 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST && !CONFIG_SET_FIDVID_CORE0_ONLY
848 /* For all APs (We know the APIC ID of all APs even when the APIC ID
849 is lifted) remote read from AP LAPIC_MSG_REG about max fid.
850 Then calculate the common max fid that can be used for all
854 for_each_ap(bsp_apicid, CONFIG_SET_FIDVID_CORE_RANGE, store_ap_apicid, &ap_apicidx);
856 for (i = 0; i < ap_apicidx.num; i++) {
857 init_fidvid_bsp_stage1(ap_apicidx.apicid[i], &fv);
860 for_each_ap(bsp_apicid, CONFIG_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage1, &fv);
863 print_debug_fv("common_fid = ", fv.common_fid);
865 if (fv.common_fid & (1 << 16)) { /* check nb_cof_vid_update */
867 // Enable the common fid and other settings.
868 enable_fid_change((fv.common_fid >> 8) & 0x1F);
870 // nbfid change need warm reset, so reset at first
874 return 0; // No FID/VID changes. Don't reset