2 * Copyright 2008-2011 Freescale Semiconductor, Inc.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <asm/processor.h>
29 #include <asm/fsl_law.h>
30 #include <asm/fsl_ddr_sdram.h>
33 DECLARE_GLOBAL_DATA_PTR;
34 u32 fsl_ddr_get_intl3r(void);
38 return mfspr(SPRN_PIR);
42 * Determine if U-Boot should keep secondary cores in reset, or let them out
43 * of reset and hold them in a spinloop
45 int hold_cores_in_reset(int verbose)
47 const char *s = getenv("mp_holdoff");
49 /* Default to no, overriden by 'y', 'yes', 'Y', 'Yes', or '1' */
50 if (s && (*s == 'y' || *s == 'Y' || *s == '1')) {
52 puts("Secondary cores are being held in reset.\n");
53 puts("See 'mp_holdoff' environment variable\n");
64 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
65 out_be32(&pic->pir, 1 << nr);
66 /* the dummy read works around an errata on early 85xx MP PICs */
67 (void)in_be32(&pic->pir);
68 out_be32(&pic->pir, 0x0);
73 int cpu_status(int nr)
75 u32 *table, id = get_my_id();
77 if (hold_cores_in_reset(1))
81 table = (u32 *)get_spin_virt_addr();
82 printf("table base @ 0x%p\n", table);
84 table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
85 printf("Running on cpu %d\n", id);
87 printf("table @ 0x%p\n", table);
88 printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
89 printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
90 printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
91 printf(" r6 - 0x%08x\n", table[BOOT_ENTRY_R6_LOWER]);
97 #ifdef CONFIG_FSL_CORENET
98 int cpu_disable(int nr)
100 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
102 setbits_be32(&gur->coredisrl, 1 << nr);
107 int is_core_disabled(int nr) {
108 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
109 u32 coredisrl = in_be32(&gur->coredisrl);
111 return (coredisrl & (1 << nr));
114 int cpu_disable(int nr)
116 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
120 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
123 setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
126 printf("Invalid cpu number for disable %d\n", nr);
133 int is_core_disabled(int nr) {
134 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
135 u32 devdisr = in_be32(&gur->devdisr);
139 return (devdisr & MPC85xx_DEVDISR_CPU0);
141 return (devdisr & MPC85xx_DEVDISR_CPU1);
143 printf("Invalid cpu number for disable %d\n", nr);
150 static u8 boot_entry_map[4] = {
157 int cpu_release(int nr, int argc, char * const argv[])
159 u32 i, val, *table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
162 if (hold_cores_in_reset(1))
165 if (nr == get_my_id()) {
166 printf("Invalid to release the boot core.\n\n");
171 printf("Invalid number of arguments to release.\n\n");
175 boot_addr = simple_strtoull(argv[0], NULL, 16);
177 /* handle pir, r3, r6 */
178 for (i = 1; i < 4; i++) {
179 if (argv[i][0] != '-') {
180 u8 entry = boot_entry_map[i];
181 val = simple_strtoul(argv[i], NULL, 16);
186 table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);
188 /* ensure all table updates complete before final address write */
191 table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);
196 u32 determine_mp_bootpg(unsigned int *pagesize)
199 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
201 u32 granule_size, check;
205 /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
206 if ((u64)gd->ram_size > 0xfffff000)
209 bootpg = gd->ram_size - 4096;
213 #ifdef CONFIG_SYS_FSL_ERRATUM_A004468
215 * Erratum A004468 has two parts. The 3-way interleaving applies to T4240,
216 * to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But
217 * the way boot page chosen in u-boot avoids hitting this erratum. So only
218 * thw workaround for 3-way interleaving is needed.
220 * To make sure boot page translation works with 3-Way DDR interleaving
221 * enforce a check for the following constrains
222 * 8K granule size requires BRSIZE=8K and
223 * bootpg >> log2(BRSIZE) %3 == 1
224 * 4K and 1K granule size requires BRSIZE=4K and
225 * bootpg >> log2(BRSIZE) %3 == 0
227 if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) {
228 e = find_law(bootpg);
230 case LAW_TRGT_IF_DDR_INTLV_123:
231 granule_size = fsl_ddr_get_intl3r() & 0x1f;
232 if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) {
235 bootpg &= 0xffffe000; /* align to 8KB */
236 check = bootpg >> 13;
237 while ((check % 3) != 1)
239 bootpg = check << 13;
240 debug("Boot page (8K) at 0x%08x\n", bootpg);
243 bootpg &= 0xfffff000; /* align to 4KB */
244 check = bootpg >> 12;
245 while ((check % 3) != 0)
247 bootpg = check << 12;
248 debug("Boot page (4K) at 0x%08x\n", bootpg);
255 #endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */
260 ulong get_spin_phys_addr(void)
262 extern ulong __secondary_start_page;
263 extern ulong __spin_table;
265 return (determine_mp_bootpg() +
266 (ulong)&__spin_table - (ulong)&__secondary_start_page);
269 ulong get_spin_virt_addr(void)
271 extern ulong __secondary_start_page;
272 extern ulong __spin_table;
274 return (CONFIG_BPTR_VIRT_ADDR +
275 (ulong)&__spin_table - (ulong)&__secondary_start_page);
278 #ifdef CONFIG_FSL_CORENET
279 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
281 u32 cpu_up_mask, whoami, brsize = LAW_SIZE_4K;
282 u32 *table = (u32 *)get_spin_virt_addr();
283 volatile ccsr_gur_t *gur;
284 volatile ccsr_local_t *ccm;
285 volatile ccsr_rcpm_t *rcpm;
286 volatile ccsr_pic_t *pic;
288 u32 mask = cpu_mask();
291 gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
292 ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
293 rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
294 pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
296 whoami = in_be32(&pic->whoami);
297 cpu_up_mask = 1 << whoami;
298 out_be32(&ccm->bstrl, bootpg);
300 e = find_law(bootpg);
301 /* pagesize is only 4K or 8K */
302 if (pagesize == 8192)
303 brsize = LAW_SIZE_8K;
304 out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | brsize);
305 debug("BRSIZE is 0x%x\n", brsize);
307 /* readback to sync write */
308 in_be32(&ccm->bstrar);
310 /* disable time base at the platform */
311 out_be32(&rcpm->ctbenrl, cpu_up_mask);
313 out_be32(&gur->brrl, mask);
315 /* wait for everyone */
317 unsigned int i, cpu, nr_cpus = cpu_numcores();
319 for_each_cpu(i, cpu, nr_cpus, mask) {
320 if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
321 cpu_up_mask |= (1 << cpu);
324 if ((cpu_up_mask & mask) == mask)
332 printf("CPU up timeout. CPU up mask is %x should be %x\n",
335 /* enable time base at the platform */
336 out_be32(&rcpm->ctbenrl, 0);
338 /* readback to sync write */
339 in_be32(&rcpm->ctbenrl);
344 out_be32(&rcpm->ctbenrl, mask);
346 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
348 * Disabling Boot Page Translation allows the memory region 0xfffff000
349 * to 0xffffffff to be used normally. Leaving Boot Page Translation
350 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
351 * unusable for normal operation but it does allow OSes to easily
352 * reset a processor core to put it back into U-Boot's spinloop.
354 clrbits_be32(&ccm->bstrar, LAW_EN);
358 static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
360 u32 up, cpu_up_mask, whoami;
361 u32 *table = (u32 *)get_spin_virt_addr();
363 volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
364 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
365 volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
369 whoami = in_be32(&pic->whoami);
370 out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));
372 /* disable time base at the platform */
373 devdisr = in_be32(&gur->devdisr);
375 devdisr |= MPC85xx_DEVDISR_TB0;
377 devdisr |= MPC85xx_DEVDISR_TB1;
378 out_be32(&gur->devdisr, devdisr);
380 /* release the hounds */
381 up = ((1 << cpu_numcores()) - 1);
382 bpcr = in_be32(&ecm->eebpcr);
384 out_be32(&ecm->eebpcr, bpcr);
385 asm("sync; isync; msync");
387 cpu_up_mask = 1 << whoami;
388 /* wait for everyone */
391 for (i = 0; i < cpu_numcores(); i++) {
392 if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
393 cpu_up_mask |= (1 << i);
396 if ((cpu_up_mask & up) == up)
404 printf("CPU up timeout. CPU up mask is %x should be %x\n",
407 /* enable time base at the platform */
409 devdisr |= MPC85xx_DEVDISR_TB1;
411 devdisr |= MPC85xx_DEVDISR_TB0;
412 out_be32(&gur->devdisr, devdisr);
414 /* readback to sync write */
415 in_be32(&gur->devdisr);
420 devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
421 out_be32(&gur->devdisr, devdisr);
423 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
425 * Disabling Boot Page Translation allows the memory region 0xfffff000
426 * to 0xffffffff to be used normally. Leaving Boot Page Translation
427 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
428 * unusable for normal operation but it does allow OSes to easily
429 * reset a processor core to put it back into U-Boot's spinloop.
431 clrbits_be32(&ecm->bptr, 0x80000000);
436 void cpu_mp_lmb_reserve(struct lmb *lmb)
438 u32 bootpg = determine_mp_bootpg(NULL);
440 lmb_reserve(lmb, bootpg, 4096);
445 extern ulong __secondary_start_page;
446 extern ulong __bootpg_addr;
448 ulong fixup = (ulong)&__secondary_start_page;
449 u32 bootpg, bootpg_map, pagesize;
451 bootpg = determine_mp_bootpg(&pagesize);
454 * pagesize is only 4K or 8K
455 * we only use the last 4K of boot page
456 * bootpg_map saves the address for the boot page
457 * 8K is used for the workaround of 3-way DDR interleaving
462 if (pagesize == 8192)
463 bootpg += 4096; /* use 2nd half */
465 /* Some OSes expect secondary cores to be held in reset */
466 if (hold_cores_in_reset(0))
469 /* Store the bootpg's SDRAM address for use by secondary CPU cores */
470 __bootpg_addr = bootpg;
472 /* look for the tlb covering the reset page, there better be one */
473 int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);
475 /* we found a match */
477 /* map reset page to bootpg so we can copy code there */
480 set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
481 MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
482 0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */
484 memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);
486 plat_mp_up(bootpg_map, pagesize);
488 puts("WARNING: No reset page TLB. "
489 "Skipping secondary core setup\n");