3 #define K8_SET_FIDVID_DEBUG 0
5 #define K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST 1
13 static inline void print_debug_fv(const char *str, unsigned val)
15 #if K8_SET_FIDVID_DEBUG == 1
16 #if CONFIG_USE_INIT==1
17 printk_debug("%s%x\r\n", str, val);
19 print_debug(str); print_debug_hex32(val); print_debug("\r\n");
24 static inline void print_debug_fv_8(const char *str, unsigned val)
26 #if K8_SET_FIDVID_DEBUG == 1
27 #if CONFIG_USE_INIT==1
28 printk_debug("%s%02x\r\n", str, val);
30 print_debug(str); print_debug_hex8(val); print_debug("\r\n");
35 static inline void print_debug_fv_64(const char *str, unsigned val, unsigned val2)
37 #if K8_SET_FIDVID_DEBUG == 1
38 #if CONFIG_USE_INIT==1
39 printk_debug("%s%x%x\r\n", str, val, val2);
41 print_debug(str); print_debug_hex32(val); print_debug_hex32(val2); print_debug("\r\n");
47 static void enable_fid_change(void)
53 nodes = ((pci_read_config32(PCI_DEV(0, 0x18, 0), 0x60)>>4) & 7) + 1;
55 for(i=0; i<nodes; i++) {
56 dword = pci_read_config32(PCI_DEV(0, 0x18+i, 3), 0xd8);
58 dword |= (2<<28) | (0x02710);
59 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0xd8, dword);
62 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0xd4, dword);
64 dword = pci_read_config32(PCI_DEV(0, 0x18+i, 2), 0x94);
65 dword |= (1<<14);// disable the DRAM interface at first, it will be enabled by raminit again
66 pci_write_config32(PCI_DEV(0, 0x18+i, 2), 0x94, dword);
68 dword = 0x23070700; //enable FID/VID change
69 // dword = 0x00070000; //enable FID/VID change
70 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0x80, dword);
73 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0x84, dword);
78 static unsigned set_fidvid(unsigned apicid, unsigned fidvid, int showmessage)
80 //for (cur, new) there is one <1600MHz x8 to find out next_fid
81 const static uint8_t next_fid_a[] = {
82 /* x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 */ // 0:x4, 2:x5....BASE=4, MIN=4, MAX=25, INC=2 result = (xX-BASE)*INC
83 /* x4 */ 0, 9, 9, 8, 9, 9, 9, 9, 9, 9, 9, 9,
84 /* x5 */ 9, 0, 11, 11, 9, 9, 10, 11, 11, 11, 11, 11,
85 /* x6 */ 11, 11, 0, 13, 11, 11, 11, 11, 12, 13, 13, 13,
86 /* x7 */ 13, 13, 13, 0, 13, 13, 13, 13, 13, 13, 14, 15,
87 /* x8 */ 4, 9, 9, 9, 0, 9, 9, 9, 9, 9, 9, 9,
88 /* x9 */ 4, 5, 10, 10, 8, 0, 0, 0, 0, 0, 0, 0,
89 /*x10 */ 9, 5, 11, 11, 9, 0, 0, 0, 0, 0, 0, 0,
90 /*x11 */ 10, 5, 6, 12, 10, 0, 0, 0, 0, 0, 0, 0,
91 /*x12 */ 11, 11, 6, 13, 11, 0, 0, 0, 0, 0, 0, 0,
92 /*x13 */ 12, 12, 6, 7, 12, 0, 0, 0, 0, 0, 0, 0,
93 /*x14 */ 13, 13, 13, 7, 13, 0, 0, 0, 0, 0, 0, 0,
94 /*x15 */ 14, 14, 14, 7, 14, 0, 0, 0, 0, 0, 0, 0,
111 if(apicid!=apicidx) {
112 #if CONFIG_USE_INIT == 1
113 printk_err("wrong apicid, we want change %x, but it is %x\r\n", apicid, apicidx);
115 print_err("wrong apicid, we want change "); print_err_hex8(apicid); print_err(" but it is "); print_err_hex8(apicidx); print_err("\r\n");
120 fid = (fidvid >> 8) & 0x3f;
121 vid = (fidvid >> 16) & 0x3f;
123 msr = rdmsr(0xc0010042);
125 vid_cur = msr.hi & 0x3f;
126 fid_cur = msr.lo & 0x3f;
128 if((vid_cur==vid) && (fid_cur==fid)) return fidvid;
130 vid_max = (msr.hi>>(48-32)) & 0x3f;
131 fid_max = ((msr.lo>>16) & 0x3f); //max fid
133 if(fid_max>=((25-4)*2)) { // FX max fid is 5G
134 fid_max = ((msr.lo>>8) & 0x3f) + 5*2; // max FID is min fid + 1G
135 if(fid_max >= ((25-4)*2)) {
136 fid_max = (10-4)*2; // hard set to 2G
143 msr.lo = (vid_max<<8) | (fid_cur);
145 msr.lo |= (1<<16); // init changes
147 wrmsr(0xc0010041, msr);
153 for(loop=0;loop<100000;loop++){
154 msr = rdmsr(0xc0010042);
155 if(!(msr.lo & (1<<31))) break;
157 vid_cur = msr.hi & 0x3f;
160 while((fid_cur!=fid) && (steps-->0)) {
162 if((fid_cur > (8-4)*2) && (fid> (8-4)*2)) {
164 fid_temp = fid_cur + 2;
166 fid_temp = fid_cur - 2;
169 else { //there is one < 8, So we need to lookup the table to find the fid_cur
171 temp = next_fid_a[(fid_cur/2)*12+(fid/2)];
173 fid_temp = (temp-4) * 2;
175 if(fid_temp>fid_max) break;
181 msr.lo = (vid_cur<<8) | fid_cur;
183 msr.lo |= (1<<16); // init changes
185 wrmsr(0xc0010041, msr);
191 #if K8_SET_FIDVID_DEBUG == 1
193 print_debug_fv_8("\tapicid in set_fidvid = ", apicid);
194 print_debug_fv_64("ctrl msr fid, vid ", msr.hi, msr.lo);
198 for(loop=0;loop<100000;loop++){
199 msr = rdmsr(0xc0010042);
200 if(!(msr.lo & (1<<31))) break;
202 fid_cur = msr.lo & 0x3f;
204 #if K8_SET_FIDVID_DEBUG == 1
206 print_debug_fv_64("status msr fid, vid ", msr.hi, msr.lo);
213 msr.lo = (vid<<8) | (fid_cur);
215 msr.lo |= (1<<16); // init changes
217 wrmsr(0xc0010041, msr);
222 for(loop=0;loop<100000;loop++){
223 msr = rdmsr(0xc0010042);
224 if(!(msr.lo & (1<<31))) break;
226 vid_cur = msr.hi & 0x3f;
228 fidvid = (vid_cur<< 16) | (fid_cur<<8);
231 if((fid!=fid_cur) || (vid!=vid_cur)) {
232 print_err("set fidvid failed\r\n");
240 static void init_fidvid_ap(unsigned bsp_apicid, unsigned apicid)
251 msr = rdmsr(0xc0010042);
252 fid_max = ((msr.lo>>16) & 0x3f); //max fid
254 if(fid_max>=((25-4)*2)) { // FX max fid is 5G
255 fid_max = ((msr.lo>>8) & 0x3f) + 5*2; // max FID is min fid + 1G
256 if(fid_max >= ((25-4)*2)) {
257 fid_max = (10-4)*2; // hard set to 2G
263 send |= ((msr.hi>>(48-32)) & 0x3f) << 16; //max vid
264 send |= (apicid<<24); // ap apicid
266 vid_cur = msr.hi & 0x3f;
267 fid_cur = msr.lo & 0x3f;
271 msr.lo = (vid_cur<<8) | (fid_cur);
272 wrmsr(0xc0010041, msr);
274 wait_cpu_state(bsp_apicid, 1);
275 //send signal to BSP about this AP max fid and vid
276 lapic_write(LAPIC_MSG_REG, send | 1); //AP at state 1 that sent our fid and vid
278 // wait_cpu_state(bsp_apicid, 2);// don't need we can use apicid directly
281 //remote read BSP signal that include vid and fid that need to set
282 if(lapic_remote_read(bsp_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
283 if(((readback>>24) & 0xff) == apicid) break; // it is this cpu turn
287 readback = set_fidvid(apicid, readback & 0xffff00, 1); // this AP
288 //send signal to BSP that this AP fid/vid is set // allow to change state2 is together with apicid
289 send = (apicid<<24) | (readback & 0x00ffff00); // AP at state that We set the requested fid/vid
292 lapic_write(LAPIC_MSG_REG, send | 2);
294 wait_cpu_state(bsp_apicid, 3);
297 static unsigned calc_common_fidvid(unsigned fidvid, unsigned fidvidx)
299 /* FIXME: need to check the change path to verify if it is reachable when common fid is small than 1.6G */
300 if((fidvid & 0xff00)<=(fidvidx & 0xff00)) {
309 unsigned common_fidvid;
312 static void init_fidvid_bsp_stage1(unsigned ap_apicid, void *gp )
316 struct fidvid_st *fvp = gp;
319 print_debug_fv("state 1: ap_apicid=", ap_apicid);
323 if(lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
324 if((readback & 0xff) == 1) break; //target ap is in stage 1
327 print_debug_fv("\treadback=", readback);
329 fvp->common_fidvid = calc_common_fidvid(fvp->common_fidvid, readback & 0xffff00);
331 print_debug_fv("\tcommon_fidvid=", fvp->common_fidvid);
334 static void init_fidvid_bsp_stage2(unsigned ap_apicid, void *gp)
338 struct fidvid_st *fvp = gp;
341 print_debug_fv("state 2: ap_apicid=", ap_apicid);
343 lapic_write(LAPIC_MSG_REG, fvp->common_fidvid | (ap_apicid<<24) | 2); // all set to state2
347 if(lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
348 if((readback & 0xff) == 2) break; // target ap is stage 2, and it'd FID has beed set
351 print_debug_fv("\treadback=", readback);
354 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
355 struct ap_apicid_st {
357 unsigned apicid[16]; // 8 way dual core need 16
358 /* FIXME: 32 node quad core, may need 128 */
361 static void store_ap_apicid(unsigned ap_apicid, void *gp)
363 struct ap_apicid_st *p = gp;
365 p->apicid[p->num++] = ap_apicid;
370 static void init_fidvid_bsp(unsigned bsp_apicid)
377 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
378 struct ap_apicid_st ap_apicidx;
384 msr = rdmsr(0xc0010042);
385 fid_max = ((msr.lo>>16) & 0x3f); //max fid
387 if(fid_max>=((25-4)*2)) { // FX max fid is 5G
388 fid_max = ((msr.lo>>8) & 0x3f) + 5*2; // max FID is min fid + 1G
389 if(fid_max >= ((25-4)*2)) {
390 fid_max = (10-4)*2; // hard set to 2G
394 vid_max = ((msr.hi>>(48-32)) & 0x3f); //max vid
395 fv.common_fidvid = (fid_max<<8)|(vid_max<<16);
398 // for all APs (We know the APIC ID of all APs even the APIC ID is lifted)
399 // remote read from AP about max fid/vid
401 //let all ap trains to state 1
402 lapic_write(LAPIC_MSG_REG, (bsp_apicid<<24) | 1);
404 // calculate the common max fid/vid that could be used for all APs and BSP
405 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
408 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, store_ap_apicid, &ap_apicidx);
410 for(i=0;i<ap_apicidx.num;i++) {
411 init_fidvid_bsp_stage1(ap_apicidx.apicid[i], &fv);
414 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage1, &fv);
420 // Can we use max only? So we can only set fid in one around, otherwise we need to set that to max after raminit
421 // set fid vid to DQS training required
422 fid = (fv.common_fidvid >> 8) & 0x3f;
423 vid = (fv.common_fidvid >> 16) & 0x3f;
426 fid = (10-4)*2; //x10
430 vid+= 4; //unit is 12.5mV
432 vid+= 2; //unit is 25mV
435 fv.common_fidvid = (fid<<8) | (vid<<16);
437 print_debug_fv("common_fidvid=", fv.common_fidvid);
441 // set BSP fid and vid
442 print_debug_fv("bsp apicid=", bsp_apicid);
443 fv.common_fidvid = set_fidvid(bsp_apicid, fv.common_fidvid, 1);
444 print_debug_fv("common_fidvid=", fv.common_fidvid);
447 //for all APs ( We know the APIC ID of all AP even the APIC ID is lifted)
448 // send signal to the AP it could change it's fid/vid
449 // remote read singnal from AP that AP is done
451 fv.common_fidvid &= 0xffff00;
453 //set state 2 allow is in init_fidvid_bsp_stage2
454 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
455 for(i=0;i<ap_apicidx.num;i++) {
456 init_fidvid_bsp_stage2(ap_apicidx.apicid[i], &fv);
459 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage2, &fv);
462 lapic_write(LAPIC_MSG_REG, fv.common_fidvid | (bsp_apicid<<24) | 3); // clear the state
464 //here wait a while, so last ap could read pack, and stop it, don't call init_timer too early or just don't use init_timer