3 #define K8_SET_FIDVID_DEBUG 0
5 #define K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST 1
7 static inline void print_debug_fv(const char *str, unsigned val)
9 #if K8_SET_FIDVID_DEBUG == 1
10 #if CONFIG_USE_INIT==1
11 printk_debug("%s%x\r\n", str, val);
13 print_debug(str); print_debug_hex32(val); print_debug("\r\n");
18 static inline void print_debug_fv_8(const char *str, unsigned val)
20 #if K8_SET_FIDVID_DEBUG == 1
21 #if CONFIG_USE_INIT==1
22 printk_debug("%s%02x\r\n", str, val);
24 print_debug(str); print_debug_hex8(val); print_debug("\r\n");
29 static inline void print_debug_fv_64(const char *str, unsigned val, unsigned val2)
31 #if K8_SET_FIDVID_DEBUG == 1
32 #if CONFIG_USE_INIT==1
33 printk_debug("%s%x%x\r\n", str, val, val2);
35 print_debug(str); print_debug_hex32(val); print_debug_hex32(val2); print_debug("\r\n");
41 static void enable_fid_change(void)
47 nodes = ((pci_read_config32(PCI_DEV(0, 0x18, 0), 0x60)>>4) & 7) + 1;
49 for(i=0; i<nodes; i++) {
50 dword = pci_read_config32(PCI_DEV(0, 0x18+i, 3), 0xd8);
52 dword |= (2<<28) | (0x02710);
53 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0xd8, dword);
56 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0xd4, dword);
58 dword = pci_read_config32(PCI_DEV(0, 0x18+i, 2), 0x94);
59 dword |= (1<<14);// disable the DRAM interface at first, it will be enabled by raminit again
60 pci_write_config32(PCI_DEV(0, 0x18+i, 2), 0x94, dword);
62 dword = 0x23070000; //enable FID/VID change
63 // dword = 0x00070000; //enable FID/VID change
64 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0x80, dword);
67 pci_write_config32(PCI_DEV(0, 0x18+i, 3), 0x84, dword);
72 static unsigned set_fidvid(unsigned apicid, unsigned fidvid, int showmessage)
74 //for (cur, new) there is one <1600MHz x8 to find out next_fid
75 const static uint8_t next_fid_a[] = {
76 /* 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
77 /* x4 */ 0, 9, 9, 8, 9, 9, 9, 9, 9, 9, 9, 9,
78 /* x5 */ 9, 0, 11, 11, 9, 9, 10, 11, 11, 11, 11, 11,
79 /* x6 */ 11, 11, 0, 13, 11, 11, 11, 11, 12, 13, 13, 13,
80 /* x7 */ 13, 13, 13, 0, 13, 13, 13, 13, 13, 13, 14, 15,
81 /* x8 */ 4, 9, 9, 9, 0, 9, 9, 9, 9, 9, 9, 9,
82 /* x9 */ 4, 5, 10, 10, 8, 0, 0, 0, 0, 0, 0, 0,
83 /*x10 */ 9, 5, 11, 11, 9, 0, 0, 0, 0, 0, 0, 0,
84 /*x11 */ 10, 5, 6, 12, 10, 0, 0, 0, 0, 0, 0, 0,
85 /*x12 */ 11, 11, 6, 13, 11, 0, 0, 0, 0, 0, 0, 0,
86 /*x13 */ 12, 12, 6, 7, 12, 0, 0, 0, 0, 0, 0, 0,
87 /*x14 */ 13, 13, 13, 7, 13, 0, 0, 0, 0, 0, 0, 0,
88 /*x15 */ 14, 14, 14, 7, 14, 0, 0, 0, 0, 0, 0, 0,
105 if(apicid!=apicidx) {
106 #if CONFIG_USE_INIT == 1
107 printk_err("wrong apicid, we want change %x, but it is %x\r\n", apicid, apicidx);
109 print_err("wrong apicid, we want change "); print_err_hex8(apicid); print_err(" but it is "); print_err_hex8(apicidx); print_err("\r\n");
114 fid = (fidvid >> 8) & 0x3f;
115 vid = (fidvid >> 16) & 0x3f;
117 msr = rdmsr(0xc0010042);
119 vid_cur = msr.hi & 0x3f;
120 fid_cur = msr.lo & 0x3f;
122 if((vid_cur==vid) && (fid_cur==fid)) return fidvid;
124 vid_max = (msr.hi>>(48-32)) & 0x3f;
125 fid_max = (msr.lo>>16) & 0x3f;
129 msr.lo = (vid_max<<8) | (fid_cur);
130 msr.lo |= (1<<16); // init changes
131 wrmsr(0xc0010041, msr);
133 for(loop=0;loop<100000;loop++){
134 msr = rdmsr(0xc0010042);
135 if(!(msr.lo & (1<<31))) break;
137 vid_cur = msr.hi & 0x3f;
140 while((fid_cur!=fid) && (steps-->0)) {
142 if((fid_cur > (8-4)*2) && (fid> (8-4)*2)) {
144 fid_temp = fid_cur + 2;
146 fid_temp = fid_cur - 2;
149 else { //there is one < 8, So we need to lookup the table to find the fid_cur
151 temp = next_fid_a[(fid_cur/2)*12+(fid/2)];
153 fid_temp = (temp-4) * 2;
155 if(fid_temp>fid_max) break;
161 msr.lo = (vid_cur<<8) | fid_cur;
162 msr.lo |= (1<<16); // init changes
163 wrmsr(0xc0010041, msr);
166 #if K8_SET_FIDVID_DEBUG == 1
168 print_debug_fv_8("\tapicid in set_fidvid = ", apicid);
169 print_debug_fv_64("ctrl msr fid, vid ", msr.hi, msr.lo);
173 for(loop=0;loop<100000;loop++){
174 msr = rdmsr(0xc0010042);
175 if(!(msr.lo & (1<<31))) break;
177 fid_cur = msr.lo & 0x3f;
179 #if K8_SET_FIDVID_DEBUG == 1
181 print_debug_fv_64("status msr fid, vid ", msr.hi, msr.lo);
188 msr.lo = (vid<<8) | (fid_cur);
189 msr.lo |= (1<<16); // init changes
190 wrmsr(0xc0010041, msr);
192 for(loop=0;loop<100000;loop++){
193 msr = rdmsr(0xc0010042);
194 if(!(msr.lo & (1<<31))) break;
196 vid_cur = msr.hi & 0x3f;
198 fidvid = (vid_cur<< 16) | (fid_cur<<8);
201 if((fid!=fid_cur) || (vid!=vid_cur)) {
202 print_err("set fidvid failed\r\n");
210 static void init_fidvid_ap(unsigned bsp_apicid, unsigned apicid)
220 msr = rdmsr(0xc0010042);
221 send = ((msr.lo>>16) & 0x3f) << 8; //max fid
222 send |= ((msr.hi>>(48-32)) & 0x3f) << 16; //max vid
223 send |= (apicid<<24); // ap apicid
225 vid_cur = msr.hi & 0x3f;
226 fid_cur = msr.lo & 0x3f;
230 msr.lo = (vid_cur<<8) | (fid_cur);
231 wrmsr(0xc0010041, msr);
233 wait_cpu_state(bsp_apicid, 1);
234 //send signal to BSP about this AP max fid and vid
235 lapic_write(LAPIC_MSG_REG, send | 1); //AP at state 1 that sent our fid and vid
237 // wait_cpu_state(bsp_apicid, 2);// don't need we can use apicid directly
240 //remote read BSP signal that include vid and fid that need to set
241 if(lapic_remote_read(bsp_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
242 if(((readback>>24) & 0xff) == apicid) break; // it is this cpu turn
246 readback = set_fidvid(apicid, readback & 0xffff00, 1); // this AP
247 //send signal to BSP that this AP fid/vid is set // allow to change state2 is together with apicid
248 send = (apicid<<24) | (readback & 0x00ffff00); // AP at state that We set the requested fid/vid
251 lapic_write(LAPIC_MSG_REG, send | 2);
253 wait_cpu_state(bsp_apicid, 3);
256 static unsigned calc_common_fidvid(unsigned fidvid, unsigned fidvidx)
258 /* FIXME: need to check the change path to verify if it is reachable when common fid is small than 1.6G */
259 if((fidvid & 0xff00)<=(fidvidx & 0xff00)) {
268 unsigned common_fidvid;
271 static void init_fidvid_bsp_stage1(unsigned ap_apicid, void *gp )
275 struct fidvid_st *fvp = gp;
278 print_debug_fv("state 1: ap_apicid=", ap_apicid);
282 if(lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
283 if((readback & 0xff) == 1) break; //target ap is in stage 1
286 print_debug_fv("\treadback=", readback);
288 fvp->common_fidvid = calc_common_fidvid(fvp->common_fidvid, readback & 0xffff00);
290 print_debug_fv("\tcommon_fidvid=", fvp->common_fidvid);
293 static void init_fidvid_bsp_stage2(unsigned ap_apicid, void *gp)
297 struct fidvid_st *fvp = gp;
300 print_debug_fv("state 2: ap_apicid=", ap_apicid);
302 lapic_write(LAPIC_MSG_REG, fvp->common_fidvid | (ap_apicid<<24) | 2); // all set to state2
306 if(lapic_remote_read(ap_apicid, LAPIC_MSG_REG, &readback)!=0) continue;
307 if((readback & 0xff) == 2) break; // target ap is stage 2, and it'd FID has beed set
310 print_debug_fv("\treadback=", readback);
313 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
314 struct ap_apicid_st {
316 unsigned apicid[16]; // 8 way dual core need 16
317 /* FIXME: 32 node quad core, may need 128 */
320 static void store_ap_apicid(unsigned ap_apicid, void *gp)
322 struct ap_apicid_st *p = gp;
324 p->apicid[p->num++] = ap_apicid;
329 static void init_fidvid_bsp(unsigned bsp_apicid)
336 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
337 struct ap_apicid_st ap_apicidx;
343 msr = rdmsr(0xc0010042);
344 fid_max = ((msr.lo>>16) & 0x3f); //max fid
345 vid_max = ((msr.hi>>(48-32)) & 0x3f); //max vid
346 fv.common_fidvid = (fid_max<<8)|(vid_max<<16);
349 // for all APs (We know the APIC ID of all APs even the APIC ID is lifted)
350 // remote read from AP about max fid/vid
352 //let all ap trains to state 1
353 lapic_write(LAPIC_MSG_REG, (bsp_apicid<<24) | 1);
355 // calculate the common max fid/vid that could be used for all APs and BSP
356 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
359 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, store_ap_apicid, &ap_apicidx);
361 for(i=0;i<ap_apicidx.num;i++) {
362 init_fidvid_bsp_stage1(ap_apicidx.apicid[i], &fv);
365 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage1, &fv);
369 // set BSP fid and vid
370 print_debug_fv("bsp apicid=", bsp_apicid);
371 fv.common_fidvid = set_fidvid(bsp_apicid, fv.common_fidvid, 1);
372 print_debug_fv("common_fidvid=", fv.common_fidvid);
375 //for all APs ( We know the APIC ID of all AP even the APIC ID is lifted)
376 // send signal to the AP it could change it's fid/vid
377 // remote read singnal from AP that AP is done
379 fv.common_fidvid &= 0xffff00;
381 //set state 2 allow is in init_fidvid_bsp_stage2
382 #if K8_SET_FIDVID_STORE_AP_APICID_AT_FIRST == 1
383 for(i=0;i<ap_apicidx.num;i++) {
384 init_fidvid_bsp_stage2(ap_apicidx.apicid[i], &fv);
387 for_each_ap(bsp_apicid, K8_SET_FIDVID_CORE0_ONLY, init_fidvid_bsp_stage2, &fv);
390 lapic_write(LAPIC_MSG_REG, fv.common_fidvid | (bsp_apicid<<24) | 3); // clear the state
392 //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