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 void config_clk_power_ctrl_reg0(int node) {
184 device_t dev = NODE_PCI(node, 3);
185 /* Program fields in Clock Power/Control register0 (F3xD4) */
187 /* set F3xD4 Clock Power/Timing Control 0 Register
188 * NbClkDidApplyAll=1b
190 * PowerStepUp= "platform dependent"
191 * PowerStepDown= "platform dependent"
193 * ClkRampHystSel=HW default
195 /* check platform type */
196 if (!(get_platform_type() & AMD_PTYPE_SVR)) {
197 /* For non-server platform
198 * PowerStepUp=01000b - 50nS
199 * PowerStepDown=01000b - 50ns
201 dword = pci_read_config32(dev, 0xd4);
203 dword |= NB_CLKDID_ALL | NB_CLKDID | PW_STP_UP50 | PW_STP_DN50 | LNK_PLL_LOCK; /* per BKDG */
204 pci_write_config32(dev, 0xd4, dword);
206 dword = pci_read_config32(dev, 0xd4);
208 /* get number of cores for PowerStepUp & PowerStepDown in server
209 1 core - 400nS - 0000b
210 2 cores - 200nS - 0010b
211 3 cores - 133nS -> 100nS - 0011b
212 4 cores - 100nS - 0011b
214 switch (get_core_num_in_bsp(node)) {
216 dword |= PW_STP_UP400 | PW_STP_DN400;
220 dword |= PW_STP_UP200 | PW_STP_DN200;
223 dword |= PW_STP_UP100 | PW_STP_DN100;
226 dword |= PW_STP_UP100 | PW_STP_DN100;
229 dword |= NB_CLKDID_ALL | NB_CLKDID | LNK_PLL_LOCK;
230 pci_write_config32(dev, 0xd4, dword);
234 static void config_power_ctrl_misc_reg(device_t dev) {
236 u32 dword = pci_read_config32(dev, 0xA0);
237 if (dword & PVI_MODE) { /* PVI */
238 /* set slamVidMode to 0 for PVI */
239 dword &= VID_SLAM_OFF | PLLLOCK_OFF;
240 dword |= PLLLOCK_DFT_L;
241 pci_write_config32(dev, 0xA0, dword);
243 /* set slamVidMode to 1 for SVI */
244 dword &= PLLLOCK_OFF;
245 dword |= PLLLOCK_DFT_L | VID_SLAM_ON;
246 pci_write_config32(dev, 0xA0, dword);
250 /* Program F3xD8[PwrPlanes] according F3xA0[DulaVdd] */
251 dword = pci_read_config32(dev, 0xD8);
253 if (dtemp & DUAL_VDD_BIT)
256 dword &= PWR_PLN_OFF;
257 pci_write_config32(dev, 0xD8, dword);
261 static void config_nb_syn_ptr_adj(device_t dev) {
262 /* Note the following settings are additional from the ported
263 * function setFidVidRegs()
265 u32 dword = pci_read_config32(dev, 0xDc);
266 dword |= 0x5 << 12; /* NbsynPtrAdj set to 0x5 per BKDG (needs reset) */
267 pci_write_config32(dev, 0xdc, dword);
271 static void config_acpi_pwr_state_ctrl_regs(device_t dev) {
272 /* Rev B settings - FIXME: support other revs. */
273 u32 dword = 0xA0E641E6;
274 pci_write_config32(dev, 0x84, dword);
276 pci_write_config32(dev, 0x80, dword);
279 static void prep_fid_change(void)
286 /* This needs to be run before any Pstate changes are requested */
290 for (i = 0; i < nodes; i++) {
291 printk(BIOS_DEBUG, "Prep FID/VID Node:%02x \n", i);
292 dev = NODE_PCI(i, 3);
295 /* BKDG r31116 2010-04-22 2.4.1.7 step b F3xD8[VSSlamTime] */
296 /* Figure out the value for VsSlamTime and program it */
297 recalculateVsSlamTimeSettingOnCorePre(dev);
299 config_clk_power_ctrl_reg0(i);
301 config_power_ctrl_misc_reg(dev);
303 config_nb_syn_ptr_adj(dev);
305 config_acpi_pwr_state_ctrl_regs(dev);
307 dword = pci_read_config32(dev, 0x80);
308 printk(BIOS_DEBUG, " F3x80: %08x \n", dword);
309 dword = pci_read_config32(dev, 0x84);
310 printk(BIOS_DEBUG, " F3x84: %08x \n", dword);
311 dword = pci_read_config32(dev, 0xD4);
312 printk(BIOS_DEBUG, " F3xD4: %08x \n", dword);
313 dword = pci_read_config32(dev, 0xD8);
314 printk(BIOS_DEBUG, " F3xD8: %08x \n", dword);
315 dword = pci_read_config32(dev, 0xDC);
316 printk(BIOS_DEBUG, " F3xDC: %08x \n", dword);
323 static void UpdateSinglePlaneNbVid(void)
329 /* copy higher voltage (lower VID) of NBVID & CPUVID to both */
330 for (i = 0; i < 5; i++) {
331 msr = rdmsr(PS_REG_BASE + i);
332 nbVid = (msr.lo & PS_CPU_VID_M_ON) >> PS_CPU_VID_SHFT;
333 cpuVid = (msr.lo & PS_NB_VID_M_ON) >> PS_NB_VID_SHFT;
335 if (nbVid != cpuVid) {
339 msr.lo = msr.lo & PS_BOTH_VID_OFF;
340 msr.lo = msr.lo | (u32) ((nbVid) << PS_NB_VID_SHFT);
341 msr.lo = msr.lo | (u32) ((nbVid) << PS_CPU_VID_SHFT);
342 wrmsr(PS_REG_BASE + i, msr);
347 static void fixPsNbVidBeforeWR(u32 newNbVid, u32 coreid)
352 /* This function sets NbVid before the warm reset.
353 * Get StartupPstate from MSRC001_0071.
354 * Read Pstate register pionted by [StartupPstate].
355 * and copy its content to P0 and P1 registers.
356 * Copy newNbVid to P0[NbVid].
357 * transition to P1 on all cores,
358 * then transition to P0 on core 0.
359 * Wait for MSRC001_0063[CurPstate] = 000b on core 0.
362 msr = rdmsr(0xc0010071);
363 startup_pstate = (msr.hi >> (32 - 32)) & 0x07;
365 /* Copy startup pstate to P1 and P0 MSRs. Set the maxvid for this node in P0.
366 * Then transition to P1 for corex and P0 for core0.
367 * These setting will be cleared by the warm reset
369 msr = rdmsr(0xC0010064 + startup_pstate);
370 wrmsr(0xC0010065, msr);
371 wrmsr(0xC0010064, msr);
373 msr.lo &= ~0xFE000000; // clear nbvid
374 msr.lo |= newNbVid << 25;
375 wrmsr(0xC0010064, msr);
377 UpdateSinglePlaneNbVid();
379 // Transition to P1 for all APs and P0 for core0.
380 msr = rdmsr(0xC0010062);
381 msr.lo = (msr.lo & ~0x07) | 1;
382 wrmsr(0xC0010062, msr);
384 // Wait for P1 to set.
386 msr = rdmsr(0xC0010063);
387 } while (msr.lo != 1);
390 msr.lo = msr.lo & ~0x07;
391 wrmsr(0xC0010062, msr);
392 // Wait for P0 to set.
394 msr = rdmsr(0xC0010063);
395 } while (msr.lo != 0);
399 static void coreDelay(void)
406 This seems like a hack to me...
407 It would be nice to have a central delay function. */
409 cycles = 8000 << 3; /* x8 (number of 1.25ns ticks) */
411 msr = 0x10; /* TSC */
412 _RDMSR(msr, &lo, &hi);
415 _RDMSR(msr, &lo, &hi);
416 } while (lo - saved < cycles);
419 static void transitionVid(u32 targetVid, u8 dev, u8 isNb)
421 u32 currentVid, dtemp;
424 u16 timeTable[8] = { 10, 20, 30, 40, 60, 100, 200, 500 };
427 /* This function steps or slam the Nb VID to the target VID.
428 * It uses VSRampTime for [SlamVidMode]=0 ([PviMode]=1)
429 * or VSSlamTime for [SlamVidMode]=1 ([PviMode]=0)to time period.
432 /* get the current VID */
433 msr = rdmsr(0xC0010071);
435 currentVid = (msr.lo >> NB_VID_POS) & BIT_MASK_7;
437 currentVid = (msr.lo >> CPU_VID_POS) & BIT_MASK_7;
439 /* Read MSRC001_0070 COFVID Control Register */
440 msr = rdmsr(0xC0010070);
443 dtemp = pci_read_config32(dev, 0xA0);
444 if (dtemp & PVI_MODE) { /* PVI, step VID */
445 if (currentVid < targetVid) {
446 while (currentVid < targetVid) {
449 msr.lo = (msr.lo & NB_VID_MASK_OFF) | (currentVid << NB_VID_POS);
451 msr.lo = (msr.lo & CPU_VID_MASK_OFF) | (currentVid << CPU_VID_POS);
452 wrmsr(0xC0010070, msr);
454 /* read F3xD8[VSRampTime] */
455 dtemp = pci_read_config32(dev, 0xD8);
456 vsTimecode = (u8) ((dtemp >> VS_RAMP_T) & 0x7);
457 vsTime = (int)timeTable[vsTimecode];
461 } while (vsTime > 0);
463 } else if (currentVid > targetVid) {
464 while (currentVid > targetVid) {
467 msr.lo = (msr.lo & NB_VID_MASK_OFF) | (currentVid << NB_VID_POS);
469 msr.lo = (msr.lo & CPU_VID_MASK_OFF) | (currentVid << CPU_VID_POS);
470 wrmsr(0xC0010070, msr);
472 /* read F3xD8[VSRampTime] */
473 dtemp = pci_read_config32(dev, 0xD8);
474 vsTimecode = (u8) ((dtemp >> VS_RAMP_T) & 0x7);
475 vsTime = (int)timeTable[vsTimecode];
479 } while (vsTime > 0);
482 } else { /* SVI, slam VID */
484 msr.lo = (msr.lo & NB_VID_MASK_OFF) | (targetVid << NB_VID_POS);
486 msr.lo = (msr.lo & CPU_VID_MASK_OFF) | (targetVid << CPU_VID_POS);
487 wrmsr(0xC0010070, msr);
489 /* read F3xD8[VSRampTime] */
490 dtemp = pci_read_config32(dev, 0xD8);
491 vsTimecode = (u8) ((dtemp >> VS_RAMP_T) & 0x7);
492 vsTime = (int)timeTable[vsTimecode];
496 } while (vsTime > 0);
501 static void init_fidvid_ap(u32 bsp_apicid, u32 apicid, u32 nodeid, u32 coreid)
506 u8 nb_cof_vid_update;
513 printk(BIOS_DEBUG, "FIDVID on AP: %02x\n", apicid);
515 /* Steps 1-6 of BIOS NB COF and VID Configuration
516 * for SVI and Single-Plane PVI Systems.
519 /* If any node has nb_cof_vid_update set all nodes need an update. */
521 nb_cof_vid_update = 0;
522 for (i = 0; i < nodes; i++) {
523 if (pci_read_config32(NODE_PCI(i, 3), 0x1FC) & 1) {
524 nb_cof_vid_update = 1;
529 dev = NODE_PCI(nodeid, 3);
530 pvimode = (pci_read_config32(dev, 0xA0) >> 8) & 1;
531 reg1fc = pci_read_config32(dev, 0x1FC);
533 if (nb_cof_vid_update) {
535 vid_max = (reg1fc >> 7) & 0x7F;
536 fid_max = (reg1fc >> 2) & 0x1F;
538 /* write newNbVid to P-state Reg's NbVid always if NbVidUpdatedAll=1 */
539 fixPsNbVidBeforeWR(vid_max, coreid);
541 vid_max = ((reg1fc >> 7) & 0x7F) - ((reg1fc >> 17) & 0x1F);
542 fid_max = ((reg1fc >> 2) & 0x1F) + ((reg1fc >> 14) & 0x7);
543 transitionVid(vid_max, dev, IS_NB);
546 /* fid setup is handled by the BSP at the end. */
548 } else { /* ! nb_cof_vid_update */
551 UpdateSinglePlaneNbVid();
554 send = (nb_cof_vid_update << 16) | (fid_max << 8);
555 send |= (apicid << 24); // ap apicid
557 // Send signal to BSP about this AP max fid
558 // This also indicates this AP is ready for warm reset (if required).
559 lapic_write(LAPIC_MSG_REG, send | F10_APSTATE_RESET);
562 static u32 calc_common_fid(u32 fid_packed, u32 fid_packed_new)
567 fidmax = (fid_packed >> 8) & 0xFF;
569 fidmax_new = (fid_packed_new >> 8) & 0xFF;
571 if (fidmax > fidmax_new) {
575 fid_packed &= 0xFF << 16;
576 fid_packed |= (fidmax << 8);
577 fid_packed |= fid_packed_new & (0xFF << 16); // set nb_cof_vid_update
582 static void init_fidvid_bsp_stage1(u32 ap_apicid, void *gp)
587 struct fidvid_st *fvp = gp;
590 print_debug_fv("Wait for AP stage 1: ap_apicid = ", ap_apicid);
594 if (lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback) != 0)
596 if ((readback & 0x3f) == 1) {
598 break; /* target ap is in stage 1 */
603 printk(BIOS_DEBUG, "%s: timed out reading from ap %02x\n",
604 __func__, ap_apicid);
608 print_debug_fv("\treadback = ", readback);
610 fvp->common_fid = calc_common_fid(fvp->common_fid, readback);
612 print_debug_fv("\tcommon_fid(packed) = ", fvp->common_fid);
616 static void updateSviPsNbVidAfterWR(u32 newNbVid)
621 /* This function copies newNbVid to NbVid bits in P-state Registers[4:0]
625 for (i = 0; i < 5; i++) {
626 msr = rdmsr(0xC0010064 + i);
627 if ((msr.hi >> 31) & 1) { /* PstateEn? */
628 msr.lo &= ~(0x7F << 25);
629 msr.lo |= (newNbVid & 0x7F) << 25;
630 wrmsr(0xC0010064 + i, msr);
636 static void fixPsNbVidAfterWR(u32 newNbVid, u8 NbVidUpdatedAll)
642 /* This function copies newNbVid to NbVid bits in P-state
643 * Registers[4:0] if its NbDid bit=0 and PstateEn bit =1 in case of
644 * NbVidUpdatedAll =0 or copies copies newNbVid to NbVid bits in
645 * P-state Registers[4:0] if its and PstateEn bit =1 in case of
646 * NbVidUpdatedAll=1. Then transition to StartPstate.
649 /* write newNbVid to P-state Reg's NbVid if its NbDid=0 */
650 for (i = 0; i < 5; i++) {
651 msr = rdmsr(0xC0010064 + i);
652 /* NbDid (bit 22 of P-state Reg) == 0 or NbVidUpdatedAll = 1 */
653 if ((((msr.lo >> 22) & 1) == 0) || NbVidUpdatedAll) {
654 msr.lo &= ~(0x7F << 25);
655 msr.lo |= (newNbVid & 0x7F) << 25;
656 wrmsr(0xC0010064 + i, msr);
660 UpdateSinglePlaneNbVid();
662 /* For each core in the system, transition all cores to StartupPstate */
663 msr = rdmsr(0xC0010071);
664 StartupPstate = msr.hi & 0x07;
665 msr = rdmsr(0xC0010062);
666 msr.lo = StartupPstate;
667 wrmsr(0xC0010062, msr);
669 /* Wait for StartupPstate to set. */
671 msr = rdmsr(0xC0010063);
672 } while (msr.lo != StartupPstate);
675 static void set_p0(void)
679 // Transition P0 for calling core.
680 msr = rdmsr(0xC0010062);
681 msr.lo = (msr.lo & ~0x07);
682 wrmsr(0xC0010062, msr);
684 /* Wait for P0 to set. */
686 msr = rdmsr(0xC0010063);
687 } while (msr.lo != 0);
690 static void finalPstateChange(void)
692 /* Enble P0 on all cores for best performance.
693 * Linux can slow them down later if need be.
694 * It is safe since they will be in C1 halt
695 * most of the time anyway.
700 static void init_fidvid_stage2(u32 apicid, u32 nodeid)
707 u8 nb_cof_vid_update;
713 /* After warm reset finish the fid/vid setup for all cores. */
715 /* If any node has nb_cof_vid_update set all nodes need an update. */
717 nb_cof_vid_update = 0;
718 for (i = 0; i < nodes; i++) {
719 if (pci_read_config32(NODE_PCI(i, 3), 0x1FC) & 1) {
720 nb_cof_vid_update = 1;
725 dev = NODE_PCI(nodeid, 3);
726 pvimode = (pci_read_config32(dev, 0xA0) >> 8) & 1;
727 reg1fc = pci_read_config32(dev, 0x1FC);
728 nbvid = (reg1fc >> 7) & 0x7F;
729 NbVidUpdateAll = (reg1fc >> 1) & 1;
731 if (nb_cof_vid_update) {
733 nbvid = (reg1fc >> 7) & 0x7F;
734 /* write newNbVid to P-state Reg's NbVid if its NbDid=0 */
735 fixPsNbVidAfterWR(nbvid, NbVidUpdateAll);
737 nbvid = ((reg1fc >> 7) & 0x7F) - ((reg1fc >> 17) & 0x1F);
738 updateSviPsNbVidAfterWR(nbvid);
740 } else { /* !nb_cof_vid_update */
742 UpdateSinglePlaneNbVid();
744 dtemp = pci_read_config32(dev, 0xA0);
745 dtemp &= PLLLOCK_OFF;
746 dtemp |= PLLLOCK_DFT_L;
747 pci_write_config32(dev, 0xA0, dtemp);
751 /* Set TSC to tick at the P0 ndfid rate */
758 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST
759 struct ap_apicid_st {
761 // it could use 256 bytes for 64 node quad core system
762 u8 apicid[NODE_NUMS * 4];
765 static void store_ap_apicid(unsigned ap_apicid, void *gp)
767 struct ap_apicid_st *p = gp;
769 p->apicid[p->num++] = ap_apicid;
775 static int init_fidvid_bsp(u32 bsp_apicid, u32 nodes)
777 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST
778 struct ap_apicid_st ap_apicidx;
785 u8 nb_cof_vid_update;
789 printk(BIOS_DEBUG, "FIDVID on BSP, APIC_id: %02x\n", bsp_apicid);
790 /* FIXME: The first half of this function is nearly the same as
791 * init_fidvid_bsp() and the code could be combined.
794 /* Steps 1-6 of BIOS NB COF and VID Configuration
795 * for SVI and Single-Plane PVI Systems.
798 /* If any node has nb_cof_vid_update set all nodes need an update. */
799 nb_cof_vid_update = 0;
800 for (i = 0; i < nodes; i++) {
801 if (pci_read_config32(NODE_PCI(i, 3), 0x1FC) & 1) {
802 nb_cof_vid_update = 1;
807 dev = NODE_PCI(0, 3);
808 pvimode = (pci_read_config32(dev, 0xA0) >> 8) & 1;
809 reg1fc = pci_read_config32(dev, 0x1FC);
811 if (nb_cof_vid_update) {
813 vid_max = (reg1fc >> 7) & 0x7F;
814 fid_max = (reg1fc >> 2) & 0x1F;
816 /* write newNbVid to P-state Reg's NbVid always if NbVidUpdatedAll=1 */
817 fixPsNbVidBeforeWR(vid_max, 0);
819 vid_max = ((reg1fc >> 7) & 0x7F) - ((reg1fc >> 17) & 0x1F);
820 fid_max = ((reg1fc >> 2) & 0x1F) + ((reg1fc >> 14) & 0x7);
821 transitionVid(vid_max, dev, IS_NB);
824 /* fid setup is handled by the BSP at the end. */
826 } else { /* ! nb_cof_vid_update */
829 UpdateSinglePlaneNbVid();
832 fv.common_fid = (nb_cof_vid_update << 16) | (fid_max << 8);
833 print_debug_fv("BSP fid = ", fv.common_fid);
835 #if CONFIG_SET_FIDVID_STORE_AP_APICID_AT_FIRST && !CONFIG_SET_FIDVID_CORE0_ONLY
836 /* For all APs (We know the APIC ID of all APs even when the APIC ID
837 is lifted) remote read from AP LAPIC_MSG_REG about max fid.
838 Then calculate the common max fid that can be used for all
842 for_each_ap(bsp_apicid, CONFIG_SET_FIDVID_CORE_RANGE, store_ap_apicid, &ap_apicidx);
844 for (i = 0; i < ap_apicidx.num; i++) {
845 init_fidvid_bsp_stage1(ap_apicidx.apicid[i], &fv);
848 for_each_ap(bsp_apicid, CONFIG_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage1, &fv);
851 print_debug_fv("common_fid = ", fv.common_fid);
853 if (fv.common_fid & (1 << 16)) { /* check nb_cof_vid_update */
855 // Enable the common fid and other settings.
856 enable_fid_change((fv.common_fid >> 8) & 0x1F);
858 // nbfid change need warm reset, so reset at first
862 return 0; // No FID/VID changes. Don't reset