1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2008-2011 Freescale Semiconductor, Inc.
9 #include <asm/processor.h>
15 #include <asm/fsl_law.h>
16 #include <fsl_ddr_sdram.h>
19 DECLARE_GLOBAL_DATA_PTR;
20 u32 fsl_ddr_get_intl3r(void);
22 extern u32 __spin_table[];
26 return mfspr(SPRN_PIR);
30 * Determine if U-Boot should keep secondary cores in reset, or let them out
31 * of reset and hold them in a spinloop
33 int hold_cores_in_reset(int verbose)
35 /* Default to no, overridden by 'y', 'yes', 'Y', 'Yes', or '1' */
36 if (env_get_yesno("mp_holdoff") == 1) {
38 puts("Secondary cores are being held in reset.\n");
39 puts("See 'mp_holdoff' environment variable\n");
50 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
51 out_be32(&pic->pir, 1 << nr);
52 /* the dummy read works around an errata on early 85xx MP PICs */
53 (void)in_be32(&pic->pir);
54 out_be32(&pic->pir, 0x0);
59 int cpu_status(u32 nr)
61 u32 *table, id = get_my_id();
63 if (hold_cores_in_reset(1))
67 table = (u32 *)&__spin_table;
68 printf("table base @ 0x%p\n", table);
69 } else if (is_core_disabled(nr)) {
72 table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
73 printf("Running on cpu %d\n", id);
75 printf("table @ 0x%p\n", table);
76 printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
77 printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
78 printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
84 #ifdef CONFIG_FSL_CORENET
85 int cpu_disable(u32 nr)
87 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
89 setbits_be32(&gur->coredisrl, 1 << nr);
94 int is_core_disabled(int nr) {
95 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
96 u32 coredisrl = in_be32(&gur->coredisrl);
98 return (coredisrl & (1 << nr));
101 int cpu_disable(u32 nr)
103 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
107 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
110 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
113 printf("Invalid cpu number for disable %d\n", nr);
120 int is_core_disabled(int nr) {
121 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
122 u32 devdisr = in_be32(&gur->devdisr);
126 return (devdisr & MPC85xx_DEVDISR_CPU0);
128 return (devdisr & MPC85xx_DEVDISR_CPU1);
130 printf("Invalid cpu number for disable %d\n", nr);
137 static u8 boot_entry_map[4] = {
143 int cpu_release(u32 nr, int argc, char *const argv[])
145 u32 i, val, *table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
148 if (hold_cores_in_reset(1))
151 if (nr == get_my_id()) {
152 printf("Invalid to release the boot core.\n\n");
157 printf("Invalid number of arguments to release.\n\n");
161 boot_addr = simple_strtoull(argv[0], NULL, 16);
164 for (i = 1; i < 3; i++) {
165 if (argv[i][0] != '-') {
166 u8 entry = boot_entry_map[i];
167 val = simple_strtoul(argv[i], NULL, 16);
172 table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);
174 /* ensure all table updates complete before final address write */
177 table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);
182 u32 determine_mp_bootpg(unsigned int *pagesize)
185 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
187 u32 granule_size, check;
192 /* use last 4K of mapped memory */
193 bootpg = ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
194 CONFIG_MAX_MEM_MAPPED : gd->ram_size) +
195 CONFIG_SYS_SDRAM_BASE - 4096;
199 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
201 * Erratum A004468 has two parts. The 3-way interleaving applies to T4240,
202 * to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But
203 * the way boot page chosen in u-boot avoids hitting this erratum. So only
204 * thw workaround for 3-way interleaving is needed.
206 * To make sure boot page translation works with 3-Way DDR interleaving
207 * enforce a check for the following constrains
208 * 8K granule size requires BRSIZE=8K and
209 * bootpg >> log2(BRSIZE) %3 == 1
210 * 4K and 1K granule size requires BRSIZE=4K and
211 * bootpg >> log2(BRSIZE) %3 == 0
213 if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) {
214 e = find_law(bootpg);
216 case LAW_TRGT_IF_DDR_INTLV_123:
217 granule_size = fsl_ddr_get_intl3r() & 0x1f;
218 if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) {
221 bootpg &= 0xffffe000; /* align to 8KB */
222 check = bootpg >> 13;
223 while ((check % 3) != 1)
225 bootpg = check << 13;
226 debug("Boot page (8K) at 0x%08x\n", bootpg);
229 bootpg &= 0xfffff000; /* align to 4KB */
230 check = bootpg >> 12;
231 while ((check % 3) != 0)
233 bootpg = check << 12;
234 debug("Boot page (4K) at 0x%08x\n", bootpg);
241 #endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */
246 phys_addr_t get_spin_phys_addr(void)
248 return virt_to_phys(&__spin_table);
251 #ifdef CONFIG_FSL_CORENET
252 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
254 u32 cpu_up_mask, whoami, brsize = LAW_SIZE_4K;
255 u32 *table = (u32 *)&__spin_table;
256 volatile ccsr_gur_t *gur;
257 volatile ccsr_local_t *ccm;
258 volatile ccsr_rcpm_t *rcpm;
259 volatile ccsr_pic_t *pic;
261 u32 mask = cpu_mask();
264 gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
265 ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
266 rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
267 pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
269 whoami = in_be32(&pic->whoami);
270 cpu_up_mask = 1 << whoami;
271 out_be32(&ccm->bstrl, bootpg);
273 e = find_law(bootpg);
274 /* pagesize is only 4K or 8K */
275 if (pagesize == 8192)
276 brsize = LAW_SIZE_8K;
277 out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | brsize);
278 debug("BRSIZE is 0x%x\n", brsize);
280 /* readback to sync write */
281 in_be32(&ccm->bstrar);
283 /* disable time base at the platform */
284 out_be32(&rcpm->ctbenrl, cpu_up_mask);
286 out_be32(&gur->brrl, mask);
288 /* wait for everyone */
290 unsigned int i, cpu, nr_cpus = cpu_numcores();
292 for_each_cpu(i, cpu, nr_cpus, mask) {
293 if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
294 cpu_up_mask |= (1 << cpu);
297 if ((cpu_up_mask & mask) == mask)
305 printf("CPU up timeout. CPU up mask is %x should be %x\n",
308 /* enable time base at the platform */
309 out_be32(&rcpm->ctbenrl, 0);
311 /* readback to sync write */
312 in_be32(&rcpm->ctbenrl);
317 out_be32(&rcpm->ctbenrl, mask);
319 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
321 * Disabling Boot Page Translation allows the memory region 0xfffff000
322 * to 0xffffffff to be used normally. Leaving Boot Page Translation
323 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
324 * unusable for normal operation but it does allow OSes to easily
325 * reset a processor core to put it back into U-Boot's spinloop.
327 clrbits_be32(&ccm->bstrar, LAW_EN);
331 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
333 u32 up, cpu_up_mask, whoami;
334 u32 *table = (u32 *)&__spin_table;
336 volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
337 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
338 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
342 whoami = in_be32(&pic->whoami);
343 out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));
345 /* disable time base at the platform */
346 devdisr = in_be32(&gur->devdisr);
348 devdisr |= MPC85xx_DEVDISR_TB0;
350 devdisr |= MPC85xx_DEVDISR_TB1;
351 out_be32(&gur->devdisr, devdisr);
353 /* release the hounds */
354 up = ((1 << cpu_numcores()) - 1);
355 bpcr = in_be32(&ecm->eebpcr);
357 out_be32(&ecm->eebpcr, bpcr);
358 asm("sync; isync; msync");
360 cpu_up_mask = 1 << whoami;
361 /* wait for everyone */
364 for (i = 0; i < cpu_numcores(); i++) {
365 if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
366 cpu_up_mask |= (1 << i);
369 if ((cpu_up_mask & up) == up)
377 printf("CPU up timeout. CPU up mask is %x should be %x\n",
380 /* enable time base at the platform */
382 devdisr |= MPC85xx_DEVDISR_TB1;
384 devdisr |= MPC85xx_DEVDISR_TB0;
385 out_be32(&gur->devdisr, devdisr);
387 /* readback to sync write */
388 in_be32(&gur->devdisr);
393 devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
394 out_be32(&gur->devdisr, devdisr);
396 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
398 * Disabling Boot Page Translation allows the memory region 0xfffff000
399 * to 0xffffffff to be used normally. Leaving Boot Page Translation
400 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
401 * unusable for normal operation but it does allow OSes to easily
402 * reset a processor core to put it back into U-Boot's spinloop.
404 clrbits_be32(&ecm->bptr, 0x80000000);
409 void cpu_mp_lmb_reserve(struct lmb *lmb)
411 u32 bootpg = determine_mp_bootpg(NULL);
413 lmb_reserve(lmb, bootpg, 4096);
418 extern u32 __secondary_start_page;
419 extern u32 __bootpg_addr, __spin_table_addr, __second_half_boot_page;
422 ulong fixup = (u32)&__secondary_start_page;
423 u32 bootpg, bootpg_map, pagesize;
425 bootpg = determine_mp_bootpg(&pagesize);
428 * pagesize is only 4K or 8K
429 * we only use the last 4K of boot page
430 * bootpg_map saves the address for the boot page
431 * 8K is used for the workaround of 3-way DDR interleaving
436 if (pagesize == 8192)
437 bootpg += 4096; /* use 2nd half */
439 /* Some OSes expect secondary cores to be held in reset */
440 if (hold_cores_in_reset(0))
444 * Store the bootpg's cache-able half address for use by secondary
445 * CPU cores to continue to boot
447 __bootpg_addr = (u32)virt_to_phys(&__second_half_boot_page);
449 /* Store spin table's physical address for use by secondary cores */
450 __spin_table_addr = (u32)get_spin_phys_addr();
452 /* flush bootpg it before copying invalidate any staled cacheline */
453 flush_cache(bootpg, 4096);
455 /* look for the tlb covering the reset page, there better be one */
456 i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);
458 /* we found a match */
460 /* map reset page to bootpg so we can copy code there */
463 set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
464 MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
465 0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */
467 memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);
469 plat_mp_up(bootpg_map, pagesize);
471 puts("WARNING: No reset page TLB. "
472 "Skipping secondary core setup\n");