1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2008-2011 Freescale Semiconductor, Inc.
10 #include <asm/processor.h>
16 #include <asm/fsl_law.h>
17 #include <fsl_ddr_sdram.h>
20 DECLARE_GLOBAL_DATA_PTR;
21 u32 fsl_ddr_get_intl3r(void);
23 extern u32 __spin_table[];
27 return mfspr(SPRN_PIR);
31 * Determine if U-Boot should keep secondary cores in reset, or let them out
32 * of reset and hold them in a spinloop
34 int hold_cores_in_reset(int verbose)
36 /* Default to no, overridden by 'y', 'yes', 'Y', 'Yes', or '1' */
37 if (env_get_yesno("mp_holdoff") == 1) {
39 puts("Secondary cores are being held in reset.\n");
40 puts("See 'mp_holdoff' environment variable\n");
51 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
52 out_be32(&pic->pir, 1 << nr);
53 /* the dummy read works around an errata on early 85xx MP PICs */
54 (void)in_be32(&pic->pir);
55 out_be32(&pic->pir, 0x0);
60 int cpu_status(u32 nr)
62 u32 *table, id = get_my_id();
64 if (hold_cores_in_reset(1))
68 table = (u32 *)&__spin_table;
69 printf("table base @ 0x%p\n", table);
70 } else if (is_core_disabled(nr)) {
73 table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
74 printf("Running on cpu %d\n", id);
76 printf("table @ 0x%p\n", table);
77 printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
78 printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
79 printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
85 #ifdef CONFIG_FSL_CORENET
86 int cpu_disable(u32 nr)
88 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
90 setbits_be32(&gur->coredisrl, 1 << nr);
95 int is_core_disabled(int nr) {
96 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
97 u32 coredisrl = in_be32(&gur->coredisrl);
99 return (coredisrl & (1 << nr));
102 int cpu_disable(u32 nr)
104 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
108 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
111 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
114 printf("Invalid cpu number for disable %d\n", nr);
121 int is_core_disabled(int nr) {
122 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
123 u32 devdisr = in_be32(&gur->devdisr);
127 return (devdisr & MPC85xx_DEVDISR_CPU0);
129 return (devdisr & MPC85xx_DEVDISR_CPU1);
131 printf("Invalid cpu number for disable %d\n", nr);
138 static u8 boot_entry_map[4] = {
144 int cpu_release(u32 nr, int argc, char *const argv[])
146 u32 i, val, *table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
149 if (hold_cores_in_reset(1))
152 if (nr == get_my_id()) {
153 printf("Invalid to release the boot core.\n\n");
158 printf("Invalid number of arguments to release.\n\n");
162 boot_addr = simple_strtoull(argv[0], NULL, 16);
165 for (i = 1; i < 3; i++) {
166 if (argv[i][0] != '-') {
167 u8 entry = boot_entry_map[i];
168 val = simple_strtoul(argv[i], NULL, 16);
173 table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);
175 /* ensure all table updates complete before final address write */
178 table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);
183 u32 determine_mp_bootpg(unsigned int *pagesize)
186 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
188 u32 granule_size, check;
193 /* use last 4K of mapped memory */
194 bootpg = ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
195 CONFIG_MAX_MEM_MAPPED : gd->ram_size) +
196 CONFIG_SYS_SDRAM_BASE - 4096;
200 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
202 * Erratum A004468 has two parts. The 3-way interleaving applies to T4240,
203 * to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But
204 * the way boot page chosen in u-boot avoids hitting this erratum. So only
205 * thw workaround for 3-way interleaving is needed.
207 * To make sure boot page translation works with 3-Way DDR interleaving
208 * enforce a check for the following constrains
209 * 8K granule size requires BRSIZE=8K and
210 * bootpg >> log2(BRSIZE) %3 == 1
211 * 4K and 1K granule size requires BRSIZE=4K and
212 * bootpg >> log2(BRSIZE) %3 == 0
214 if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) {
215 e = find_law(bootpg);
217 case LAW_TRGT_IF_DDR_INTLV_123:
218 granule_size = fsl_ddr_get_intl3r() & 0x1f;
219 if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) {
222 bootpg &= 0xffffe000; /* align to 8KB */
223 check = bootpg >> 13;
224 while ((check % 3) != 1)
226 bootpg = check << 13;
227 debug("Boot page (8K) at 0x%08x\n", bootpg);
230 bootpg &= 0xfffff000; /* align to 4KB */
231 check = bootpg >> 12;
232 while ((check % 3) != 0)
234 bootpg = check << 12;
235 debug("Boot page (4K) at 0x%08x\n", bootpg);
242 #endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */
247 phys_addr_t get_spin_phys_addr(void)
249 return virt_to_phys(&__spin_table);
252 #ifdef CONFIG_FSL_CORENET
253 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
255 u32 cpu_up_mask, whoami, brsize = LAW_SIZE_4K;
256 u32 *table = (u32 *)&__spin_table;
257 volatile ccsr_gur_t *gur;
258 volatile ccsr_local_t *ccm;
259 volatile ccsr_rcpm_t *rcpm;
260 volatile ccsr_pic_t *pic;
262 u32 mask = cpu_mask();
265 gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
266 ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
267 rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
268 pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
270 whoami = in_be32(&pic->whoami);
271 cpu_up_mask = 1 << whoami;
272 out_be32(&ccm->bstrl, bootpg);
274 e = find_law(bootpg);
275 /* pagesize is only 4K or 8K */
276 if (pagesize == 8192)
277 brsize = LAW_SIZE_8K;
278 out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | brsize);
279 debug("BRSIZE is 0x%x\n", brsize);
281 /* readback to sync write */
282 in_be32(&ccm->bstrar);
284 /* disable time base at the platform */
285 out_be32(&rcpm->ctbenrl, cpu_up_mask);
287 out_be32(&gur->brrl, mask);
289 /* wait for everyone */
291 unsigned int i, cpu, nr_cpus = cpu_numcores();
293 for_each_cpu(i, cpu, nr_cpus, mask) {
294 if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
295 cpu_up_mask |= (1 << cpu);
298 if ((cpu_up_mask & mask) == mask)
306 printf("CPU up timeout. CPU up mask is %x should be %x\n",
309 /* enable time base at the platform */
310 out_be32(&rcpm->ctbenrl, 0);
312 /* readback to sync write */
313 in_be32(&rcpm->ctbenrl);
318 out_be32(&rcpm->ctbenrl, mask);
320 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
322 * Disabling Boot Page Translation allows the memory region 0xfffff000
323 * to 0xffffffff to be used normally. Leaving Boot Page Translation
324 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
325 * unusable for normal operation but it does allow OSes to easily
326 * reset a processor core to put it back into U-Boot's spinloop.
328 clrbits_be32(&ccm->bstrar, LAW_EN);
332 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
334 u32 up, cpu_up_mask, whoami;
335 u32 *table = (u32 *)&__spin_table;
337 volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
338 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
339 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
343 whoami = in_be32(&pic->whoami);
344 out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));
346 /* disable time base at the platform */
347 devdisr = in_be32(&gur->devdisr);
349 devdisr |= MPC85xx_DEVDISR_TB0;
351 devdisr |= MPC85xx_DEVDISR_TB1;
352 out_be32(&gur->devdisr, devdisr);
354 /* release the hounds */
355 up = ((1 << cpu_numcores()) - 1);
356 bpcr = in_be32(&ecm->eebpcr);
358 out_be32(&ecm->eebpcr, bpcr);
359 asm("sync; isync; msync");
361 cpu_up_mask = 1 << whoami;
362 /* wait for everyone */
365 for (i = 0; i < cpu_numcores(); i++) {
366 if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
367 cpu_up_mask |= (1 << i);
370 if ((cpu_up_mask & up) == up)
378 printf("CPU up timeout. CPU up mask is %x should be %x\n",
381 /* enable time base at the platform */
383 devdisr |= MPC85xx_DEVDISR_TB1;
385 devdisr |= MPC85xx_DEVDISR_TB0;
386 out_be32(&gur->devdisr, devdisr);
388 /* readback to sync write */
389 in_be32(&gur->devdisr);
394 devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
395 out_be32(&gur->devdisr, devdisr);
397 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
399 * Disabling Boot Page Translation allows the memory region 0xfffff000
400 * to 0xffffffff to be used normally. Leaving Boot Page Translation
401 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
402 * unusable for normal operation but it does allow OSes to easily
403 * reset a processor core to put it back into U-Boot's spinloop.
405 clrbits_be32(&ecm->bptr, 0x80000000);
410 void cpu_mp_lmb_reserve(struct lmb *lmb)
412 u32 bootpg = determine_mp_bootpg(NULL);
414 lmb_reserve(lmb, bootpg, 4096);
419 extern u32 __secondary_start_page;
420 extern u32 __bootpg_addr, __spin_table_addr, __second_half_boot_page;
423 ulong fixup = (u32)&__secondary_start_page;
424 u32 bootpg, bootpg_map, pagesize;
426 bootpg = determine_mp_bootpg(&pagesize);
429 * pagesize is only 4K or 8K
430 * we only use the last 4K of boot page
431 * bootpg_map saves the address for the boot page
432 * 8K is used for the workaround of 3-way DDR interleaving
437 if (pagesize == 8192)
438 bootpg += 4096; /* use 2nd half */
440 /* Some OSes expect secondary cores to be held in reset */
441 if (hold_cores_in_reset(0))
445 * Store the bootpg's cache-able half address for use by secondary
446 * CPU cores to continue to boot
448 __bootpg_addr = (u32)virt_to_phys(&__second_half_boot_page);
450 /* Store spin table's physical address for use by secondary cores */
451 __spin_table_addr = (u32)get_spin_phys_addr();
453 /* flush bootpg it before copying invalidate any staled cacheline */
454 flush_cache(bootpg, 4096);
456 /* look for the tlb covering the reset page, there better be one */
457 i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);
459 /* we found a match */
461 /* map reset page to bootpg so we can copy code there */
464 set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
465 MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
466 0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */
468 memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);
470 plat_mp_up(bootpg_map, pagesize);
472 puts("WARNING: No reset page TLB. "
473 "Skipping secondary core setup\n");