2 * Copyright 2014-2015 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/system.h>
10 #include <asm/arch/mp.h>
11 #include <asm/arch/soc.h>
13 #include <asm/arch-fsl-layerscape/soc.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 void *get_spin_tbl_addr(void)
22 phys_addr_t determine_mp_bootpg(void)
24 return (phys_addr_t)&secondary_boot_code;
27 void update_os_arch_secondary_cores(uint8_t os_arch)
29 u64 *table = get_spin_tbl_addr();
32 for (i = 1; i < CONFIG_MAX_CPUS; i++)
33 table[i * WORDS_PER_SPIN_TABLE_ENTRY +
34 SPIN_TABLE_ELEM_OS_ARCH_IDX] = os_arch;
37 #ifdef CONFIG_FSL_LSCH3
38 void wake_secondary_core_n(int cluster, int core, int cluster_cores)
40 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
41 struct ccsr_reset __iomem *rst = (void *)(CONFIG_SYS_FSL_RST_ADDR);
44 mpidr = ((cluster << 8) | core);
46 * mpidr_el1 register value of core which needs to be released
47 * is written to scratchrw[6] register
49 gur_out32(&gur->scratchrw[6], mpidr);
50 asm volatile("dsb st" : : : "memory");
51 rst->brrl |= 1 << ((cluster * cluster_cores) + core);
52 asm volatile("dsb st" : : : "memory");
54 * scratchrw[6] register value is polled
55 * when the value becomes zero, this means that this core is up
56 * and running, next core can be released now
58 while (gur_in32(&gur->scratchrw[6]) != 0)
63 int fsl_layerscape_wake_seconday_cores(void)
65 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
66 #ifdef CONFIG_FSL_LSCH3
67 struct ccsr_reset __iomem *rst = (void *)(CONFIG_SYS_FSL_RST_ADDR);
68 u32 svr, ver, cluster, type;
69 int j = 0, cluster_cores = 0;
70 #elif defined(CONFIG_FSL_LSCH2)
71 struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
73 u32 cores, cpu_up_mask = 1;
75 u64 *table = get_spin_tbl_addr();
77 #ifdef COUNTER_FREQUENCY_REAL
78 /* update for secondary cores */
79 __real_cntfrq = COUNTER_FREQUENCY_REAL;
80 flush_dcache_range((unsigned long)&__real_cntfrq,
81 (unsigned long)&__real_cntfrq + 8);
85 /* Clear spin table so that secondary processors
86 * observe the correct value after waking up from wfe.
88 memset(table, 0, CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE);
89 flush_dcache_range((unsigned long)table,
90 (unsigned long)table +
91 (CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE));
93 printf("Waking secondary cores to start from %lx\n", gd->relocaddr);
95 #ifdef CONFIG_FSL_LSCH3
96 gur_out32(&gur->bootlocptrh, (u32)(gd->relocaddr >> 32));
97 gur_out32(&gur->bootlocptrl, (u32)gd->relocaddr);
99 svr = gur_in32(&gur->svr);
100 ver = SVR_SOC_VER(svr);
101 if (ver == SVR_LS2080A || ver == SVR_LS2085A) {
102 gur_out32(&gur->scratchrw[6], 1);
103 asm volatile("dsb st" : : : "memory");
105 asm volatile("dsb st" : : : "memory");
108 * Release the cores out of reset one-at-a-time to avoid
112 cluster = in_le32(&gur->tp_cluster[i].lower);
113 for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
114 type = initiator_type(cluster, j);
116 TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
121 cluster = in_le32(&gur->tp_cluster[i].lower);
122 for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
123 type = initiator_type(cluster, j);
125 TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
126 wake_secondary_core_n(i, j,
130 } while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
132 #elif defined(CONFIG_FSL_LSCH2)
133 scfg_out32(&scfg->scratchrw[0], (u32)(gd->relocaddr >> 32));
134 scfg_out32(&scfg->scratchrw[1], (u32)gd->relocaddr);
135 asm volatile("dsb st" : : : "memory");
136 gur_out32(&gur->brrl, cores);
137 asm volatile("dsb st" : : : "memory");
139 /* Bootup online cores */
140 scfg_out32(&scfg->corebcr, cores);
142 /* This is needed as a precautionary measure.
143 * If some code before this has accidentally released the secondary
144 * cores then the pre-bootloader code will trap them in a "wfe" unless
145 * the scratchrw[6] is set. In this case we need a sev here to get these
146 * cores moving again.
151 flush_dcache_range((unsigned long)table, (unsigned long)table +
152 CONFIG_MAX_CPUS * 64);
153 for (i = 1; i < CONFIG_MAX_CPUS; i++) {
154 if (table[i * WORDS_PER_SPIN_TABLE_ENTRY +
155 SPIN_TABLE_ELEM_STATUS_IDX])
156 cpu_up_mask |= 1 << i;
158 if (hweight32(cpu_up_mask) == hweight32(cores))
163 printf("Not all cores (0x%x) are up (0x%x)\n",
167 printf("All (%d) cores are up.\n", hweight32(cores));
172 int is_core_valid(unsigned int core)
174 return !!((1 << core) & cpu_mask());
177 static int is_pos_valid(unsigned int pos)
179 return !!((1 << pos) & cpu_pos_mask());
182 int is_core_online(u64 cpu_id)
185 int pos = id_to_core(cpu_id);
186 table = (u64 *)get_spin_tbl_addr() + pos * WORDS_PER_SPIN_TABLE_ENTRY;
187 return table[SPIN_TABLE_ELEM_STATUS_IDX] == 1;
190 int cpu_reset(int nr)
192 puts("Feature is not implemented.\n");
197 int cpu_disable(int nr)
199 puts("Feature is not implemented.\n");
204 static int core_to_pos(int nr)
206 u32 cores = cpu_pos_mask();
211 } else if (nr >= hweight32(cores)) {
212 puts("Not a valid core number.\n");
216 for (i = 1; i < 32; i++) {
217 if (is_pos_valid(i)) {
230 int cpu_status(int nr)
236 table = (u64 *)get_spin_tbl_addr();
237 printf("table base @ 0x%p\n", table);
239 pos = core_to_pos(nr);
242 table = (u64 *)get_spin_tbl_addr() + pos *
243 WORDS_PER_SPIN_TABLE_ENTRY;
244 printf("table @ 0x%p\n", table);
245 printf(" addr - 0x%016llx\n",
246 table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX]);
247 printf(" status - 0x%016llx\n",
248 table[SPIN_TABLE_ELEM_STATUS_IDX]);
249 printf(" lpid - 0x%016llx\n",
250 table[SPIN_TABLE_ELEM_LPID_IDX]);
256 int cpu_release(int nr, int argc, char * const argv[])
259 u64 *table = (u64 *)get_spin_tbl_addr();
262 pos = core_to_pos(nr);
266 table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
267 boot_addr = simple_strtoull(argv[0], NULL, 16);
268 table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX] = boot_addr;
269 flush_dcache_range((unsigned long)table,
270 (unsigned long)table + SPIN_TABLE_ELEM_SIZE);
271 asm volatile("dsb st");
272 smp_kick_all_cpus(); /* only those with entry addr set will run */
274 * When the first release command runs, all cores are set to go. Those
275 * without a valid entry address will be trapped by "wfe". "sev" kicks
276 * them off to check the address again. When set, they continue to run.