diff options
Diffstat (limited to 'arch/mips/loongson/loongson-3/smp.c')
| -rw-r--r-- | arch/mips/loongson/loongson-3/smp.c | 652 |
1 files changed, 0 insertions, 652 deletions
diff --git a/arch/mips/loongson/loongson-3/smp.c b/arch/mips/loongson/loongson-3/smp.c deleted file mode 100644 index 509877c6e9d9..000000000000 --- a/arch/mips/loongson/loongson-3/smp.c +++ /dev/null @@ -1,652 +0,0 @@ -/* - * Copyright (C) 2010, 2011, 2012, Lemote, Inc. - * Author: Chen Huacai, chenhc@lemote.com - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#include <linux/init.h> -#include <linux/cpu.h> -#include <linux/sched.h> -#include <linux/smp.h> -#include <linux/cpufreq.h> -#include <asm/processor.h> -#include <asm/time.h> -#include <asm/clock.h> -#include <asm/tlbflush.h> -#include <asm/cacheflush.h> -#include <loongson.h> -#include <workarounds.h> - -#include "smp.h" - -DEFINE_PER_CPU(int, cpu_state); -DEFINE_PER_CPU(uint32_t, core0_c0count); - -static void *ipi_set0_regs[16]; -static void *ipi_clear0_regs[16]; -static void *ipi_status0_regs[16]; -static void *ipi_en0_regs[16]; -static void *ipi_mailbox_buf[16]; - -/* read a 32bit value from ipi register */ -#define loongson3_ipi_read32(addr) readl(addr) -/* read a 64bit value from ipi register */ -#define loongson3_ipi_read64(addr) readq(addr) -/* write a 32bit value to ipi register */ -#define loongson3_ipi_write32(action, addr) \ - do { \ - writel(action, addr); \ - __wbflush(); \ - } while (0) -/* write a 64bit value to ipi register */ -#define loongson3_ipi_write64(action, addr) \ - do { \ - writeq(action, addr); \ - __wbflush(); \ - } while (0) - -static void ipi_set0_regs_init(void) -{ - ipi_set0_regs[0] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + SET0); - ipi_set0_regs[1] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + SET0); - ipi_set0_regs[2] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + SET0); - ipi_set0_regs[3] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + SET0); - ipi_set0_regs[4] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + SET0); - ipi_set0_regs[5] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + SET0); - ipi_set0_regs[6] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + SET0); - ipi_set0_regs[7] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + SET0); - ipi_set0_regs[8] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + SET0); - ipi_set0_regs[9] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + SET0); - ipi_set0_regs[10] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + SET0); - ipi_set0_regs[11] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + SET0); - ipi_set0_regs[12] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + SET0); - ipi_set0_regs[13] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + SET0); - ipi_set0_regs[14] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + SET0); - ipi_set0_regs[15] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + SET0); -} - -static void ipi_clear0_regs_init(void) -{ - ipi_clear0_regs[0] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + CLEAR0); - ipi_clear0_regs[1] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + CLEAR0); - ipi_clear0_regs[2] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + CLEAR0); - ipi_clear0_regs[3] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + CLEAR0); - ipi_clear0_regs[4] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + CLEAR0); - ipi_clear0_regs[5] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + CLEAR0); - ipi_clear0_regs[6] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + CLEAR0); - ipi_clear0_regs[7] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + CLEAR0); - ipi_clear0_regs[8] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + CLEAR0); - ipi_clear0_regs[9] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + CLEAR0); - ipi_clear0_regs[10] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + CLEAR0); - ipi_clear0_regs[11] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + CLEAR0); - ipi_clear0_regs[12] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + CLEAR0); - ipi_clear0_regs[13] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + CLEAR0); - ipi_clear0_regs[14] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + CLEAR0); - ipi_clear0_regs[15] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + CLEAR0); -} - -static void ipi_status0_regs_init(void) -{ - ipi_status0_regs[0] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + STATUS0); - ipi_status0_regs[1] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + STATUS0); - ipi_status0_regs[2] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + STATUS0); - ipi_status0_regs[3] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + STATUS0); - ipi_status0_regs[4] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + STATUS0); - ipi_status0_regs[5] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + STATUS0); - ipi_status0_regs[6] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + STATUS0); - ipi_status0_regs[7] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + STATUS0); - ipi_status0_regs[8] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + STATUS0); - ipi_status0_regs[9] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + STATUS0); - ipi_status0_regs[10] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + STATUS0); - ipi_status0_regs[11] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + STATUS0); - ipi_status0_regs[12] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + STATUS0); - ipi_status0_regs[13] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + STATUS0); - ipi_status0_regs[14] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + STATUS0); - ipi_status0_regs[15] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + STATUS0); -} - -static void ipi_en0_regs_init(void) -{ - ipi_en0_regs[0] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + EN0); - ipi_en0_regs[1] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + EN0); - ipi_en0_regs[2] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + EN0); - ipi_en0_regs[3] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + EN0); - ipi_en0_regs[4] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + EN0); - ipi_en0_regs[5] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + EN0); - ipi_en0_regs[6] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + EN0); - ipi_en0_regs[7] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + EN0); - ipi_en0_regs[8] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + EN0); - ipi_en0_regs[9] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + EN0); - ipi_en0_regs[10] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + EN0); - ipi_en0_regs[11] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + EN0); - ipi_en0_regs[12] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + EN0); - ipi_en0_regs[13] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + EN0); - ipi_en0_regs[14] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + EN0); - ipi_en0_regs[15] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + EN0); -} - -static void ipi_mailbox_buf_init(void) -{ - ipi_mailbox_buf[0] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + BUF); - ipi_mailbox_buf[1] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + BUF); - ipi_mailbox_buf[2] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + BUF); - ipi_mailbox_buf[3] = (void *) - (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + BUF); - ipi_mailbox_buf[4] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + BUF); - ipi_mailbox_buf[5] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + BUF); - ipi_mailbox_buf[6] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + BUF); - ipi_mailbox_buf[7] = (void *) - (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + BUF); - ipi_mailbox_buf[8] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + BUF); - ipi_mailbox_buf[9] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + BUF); - ipi_mailbox_buf[10] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + BUF); - ipi_mailbox_buf[11] = (void *) - (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + BUF); - ipi_mailbox_buf[12] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + BUF); - ipi_mailbox_buf[13] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + BUF); - ipi_mailbox_buf[14] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + BUF); - ipi_mailbox_buf[15] = (void *) - (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + BUF); -} - -/* - * Simple enough, just poke the appropriate ipi register - */ -static void loongson3_send_ipi_single(int cpu, unsigned int action) -{ - loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(cpu)]); -} - -static void -loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action) -{ - unsigned int i; - - for_each_cpu(i, mask) - loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(i)]); -} - -void loongson3_ipi_interrupt(struct pt_regs *regs) -{ - int i, cpu = smp_processor_id(); - unsigned int action, c0count; - - /* Load the ipi register to figure out what we're supposed to do */ - action = loongson3_ipi_read32(ipi_status0_regs[cpu_logical_map(cpu)]); - - /* Clear the ipi register to clear the interrupt */ - loongson3_ipi_write32((u32)action, ipi_clear0_regs[cpu_logical_map(cpu)]); - - if (action & SMP_RESCHEDULE_YOURSELF) - scheduler_ipi(); - - if (action & SMP_CALL_FUNCTION) - smp_call_function_interrupt(); - - if (action & SMP_ASK_C0COUNT) { - BUG_ON(cpu != 0); - c0count = read_c0_count(); - for (i = 1; i < num_possible_cpus(); i++) - per_cpu(core0_c0count, i) = c0count; - } -} - -#define MAX_LOOPS 1111 -/* - * SMP init and finish on secondary CPUs - */ -static void loongson3_init_secondary(void) -{ - int i; - uint32_t initcount; - unsigned int cpu = smp_processor_id(); - unsigned int imask = STATUSF_IP7 | STATUSF_IP6 | - STATUSF_IP3 | STATUSF_IP2; - - /* Set interrupt mask, but don't enable */ - change_c0_status(ST0_IM, imask); - - for (i = 0; i < num_possible_cpus(); i++) - loongson3_ipi_write32(0xffffffff, ipi_en0_regs[cpu_logical_map(i)]); - - per_cpu(cpu_state, cpu) = CPU_ONLINE; - cpu_data[cpu].core = - cpu_logical_map(cpu) % loongson_sysconf.cores_per_package; - cpu_data[cpu].package = - cpu_logical_map(cpu) / loongson_sysconf.cores_per_package; - - i = 0; - __this_cpu_write(core0_c0count, 0); - loongson3_send_ipi_single(0, SMP_ASK_C0COUNT); - while (!__this_cpu_read(core0_c0count)) { - i++; - cpu_relax(); - } - - if (i > MAX_LOOPS) - i = MAX_LOOPS; - initcount = __this_cpu_read(core0_c0count) + i; - write_c0_count(initcount); -} - -static void loongson3_smp_finish(void) -{ - int cpu = smp_processor_id(); - - write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); - local_irq_enable(); - loongson3_ipi_write64(0, - (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); - pr_info("CPU#%d finished, CP0_ST=%x\n", - smp_processor_id(), read_c0_status()); -} - -static void __init loongson3_smp_setup(void) -{ - int i = 0, num = 0; /* i: physical id, num: logical id */ - - init_cpu_possible(cpu_none_mask); - - /* For unified kernel, NR_CPUS is the maximum possible value, - * loongson_sysconf.nr_cpus is the really present value */ - while (i < loongson_sysconf.nr_cpus) { - if (loongson_sysconf.reserved_cpus_mask & (1<<i)) { - /* Reserved physical CPU cores */ - __cpu_number_map[i] = -1; - } else { - __cpu_number_map[i] = num; - __cpu_logical_map[num] = i; - set_cpu_possible(num, true); - num++; - } - i++; - } - pr_info("Detected %i available CPU(s)\n", num); - - while (num < loongson_sysconf.nr_cpus) { - __cpu_logical_map[num] = -1; - num++; - } - - ipi_set0_regs_init(); - ipi_clear0_regs_init(); - ipi_status0_regs_init(); - ipi_en0_regs_init(); - ipi_mailbox_buf_init(); - cpu_data[0].core = cpu_logical_map(0) % loongson_sysconf.cores_per_package; - cpu_data[0].package = cpu_logical_map(0) / loongson_sysconf.cores_per_package; -} - -static void __init loongson3_prepare_cpus(unsigned int max_cpus) -{ - init_cpu_present(cpu_possible_mask); - per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE; -} - -/* - * Setup the PC, SP, and GP of a secondary processor and start it runing! - */ -static void loongson3_boot_secondary(int cpu, struct task_struct *idle) -{ - unsigned long startargs[4]; - - pr_info("Booting CPU#%d...\n", cpu); - - /* startargs[] are initial PC, SP and GP for secondary CPU */ - startargs[0] = (unsigned long)&smp_bootstrap; - startargs[1] = (unsigned long)__KSTK_TOS(idle); - startargs[2] = (unsigned long)task_thread_info(idle); - startargs[3] = 0; - - pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n", - cpu, startargs[0], startargs[1], startargs[2]); - - loongson3_ipi_write64(startargs[3], - (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18)); - loongson3_ipi_write64(startargs[2], - (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x10)); - loongson3_ipi_write64(startargs[1], - (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x8)); - loongson3_ipi_write64(startargs[0], - (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); -} - -#ifdef CONFIG_HOTPLUG_CPU - -static int loongson3_cpu_disable(void) -{ - unsigned long flags; - unsigned int cpu = smp_processor_id(); - - if (cpu == 0) - return -EBUSY; - - set_cpu_online(cpu, false); - cpumask_clear_cpu(cpu, &cpu_callin_map); - local_irq_save(flags); - fixup_irqs(); - local_irq_restore(flags); - flush_cache_all(); - local_flush_tlb_all(); - - return 0; -} - - -static void loongson3_cpu_die(unsigned int cpu) -{ - while (per_cpu(cpu_state, cpu) != CPU_DEAD) - cpu_relax(); - - mb(); -} - -/* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and - * flush all L1 entries at first. Then, another core (usually Core 0) can - * safely disable the clock of the target core. loongson3_play_dead() is - * called via CKSEG1 (uncached and unmmaped) */ -static void loongson3a_play_dead(int *state_addr) -{ - register int val; - register long cpuid, core, node, count; - register void *addr, *base, *initfunc; - - __asm__ __volatile__( - " .set push \n" - " .set noreorder \n" - " li %[addr], 0x80000000 \n" /* KSEG0 */ - "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ - " cache 0, 1(%[addr]) \n" - " cache 0, 2(%[addr]) \n" - " cache 0, 3(%[addr]) \n" - " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ - " cache 1, 1(%[addr]) \n" - " cache 1, 2(%[addr]) \n" - " cache 1, 3(%[addr]) \n" - " addiu %[sets], %[sets], -1 \n" - " bnez %[sets], 1b \n" - " addiu %[addr], %[addr], 0x20 \n" - " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ - " sw %[val], (%[state_addr]) \n" - " sync \n" - " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ - " .set pop \n" - : [addr] "=&r" (addr), [val] "=&r" (val) - : [state_addr] "r" (state_addr), - [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); - - __asm__ __volatile__( - " .set push \n" - " .set noreorder \n" - " .set mips64 \n" - " mfc0 %[cpuid], $15, 1 \n" - " andi %[cpuid], 0x3ff \n" - " dli %[base], 0x900000003ff01000 \n" - " andi %[core], %[cpuid], 0x3 \n" - " sll %[core], 8 \n" /* get core id */ - " or %[base], %[base], %[core] \n" - " andi %[node], %[cpuid], 0xc \n" - " dsll %[node], 42 \n" /* get node id */ - " or %[base], %[base], %[node] \n" - "1: li %[count], 0x100 \n" /* wait for init loop */ - "2: bnez %[count], 2b \n" /* limit mailbox access */ - " addiu %[count], -1 \n" - " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ - " beqz %[initfunc], 1b \n" - " nop \n" - " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ - " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ - " ld $a1, 0x38(%[base]) \n" - " jr %[initfunc] \n" /* jump to initial PC */ - " nop \n" - " .set pop \n" - : [core] "=&r" (core), [node] "=&r" (node), - [base] "=&r" (base), [cpuid] "=&r" (cpuid), - [count] "=&r" (count), [initfunc] "=&r" (initfunc) - : /* No Input */ - : "a1"); -} - -static void loongson3b_play_dead(int *state_addr) -{ - register int val; - register long cpuid, core, node, count; - register void *addr, *base, *initfunc; - - __asm__ __volatile__( - " .set push \n" - " .set noreorder \n" - " li %[addr], 0x80000000 \n" /* KSEG0 */ - "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ - " cache 0, 1(%[addr]) \n" - " cache 0, 2(%[addr]) \n" - " cache 0, 3(%[addr]) \n" - " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ - " cache 1, 1(%[addr]) \n" - " cache 1, 2(%[addr]) \n" - " cache 1, 3(%[addr]) \n" - " addiu %[sets], %[sets], -1 \n" - " bnez %[sets], 1b \n" - " addiu %[addr], %[addr], 0x20 \n" - " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ - " sw %[val], (%[state_addr]) \n" - " sync \n" - " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ - " .set pop \n" - : [addr] "=&r" (addr), [val] "=&r" (val) - : [state_addr] "r" (state_addr), - [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); - - __asm__ __volatile__( - " .set push \n" - " .set noreorder \n" - " .set mips64 \n" - " mfc0 %[cpuid], $15, 1 \n" - " andi %[cpuid], 0x3ff \n" - " dli %[base], 0x900000003ff01000 \n" - " andi %[core], %[cpuid], 0x3 \n" - " sll %[core], 8 \n" /* get core id */ - " or %[base], %[base], %[core] \n" - " andi %[node], %[cpuid], 0xc \n" - " dsll %[node], 42 \n" /* get node id */ - " or %[base], %[base], %[node] \n" - " dsrl %[node], 30 \n" /* 15:14 */ - " or %[base], %[base], %[node] \n" - "1: li %[count], 0x100 \n" /* wait for init loop */ - "2: bnez %[count], 2b \n" /* limit mailbox access */ - " addiu %[count], -1 \n" - " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ - " beqz %[initfunc], 1b \n" - " nop \n" - " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ - " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ - " ld $a1, 0x38(%[base]) \n" - " jr %[initfunc] \n" /* jump to initial PC */ - " nop \n" - " .set pop \n" - : [core] "=&r" (core), [node] "=&r" (node), - [base] "=&r" (base), [cpuid] "=&r" (cpuid), - [count] "=&r" (count), [initfunc] "=&r" (initfunc) - : /* No Input */ - : "a1"); -} - -void play_dead(void) -{ - int *state_addr; - unsigned int cpu = smp_processor_id(); - void (*play_dead_at_ckseg1)(int *); - - idle_task_exit(); - switch (loongson_sysconf.cputype) { - case Loongson_3A: - default: - play_dead_at_ckseg1 = - (void *)CKSEG1ADDR((unsigned long)loongson3a_play_dead); - break; - case Loongson_3B: - play_dead_at_ckseg1 = - (void *)CKSEG1ADDR((unsigned long)loongson3b_play_dead); - break; - } - state_addr = &per_cpu(cpu_state, cpu); - mb(); - play_dead_at_ckseg1(state_addr); -} - -void loongson3_disable_clock(int cpu) -{ - uint64_t core_id = cpu_data[cpu].core; - uint64_t package_id = cpu_data[cpu].package; - - if (loongson_sysconf.cputype == Loongson_3A) { - LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id)); - } else if (loongson_sysconf.cputype == Loongson_3B) { - if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) - LOONGSON_FREQCTRL(package_id) &= ~(1 << (core_id * 4 + 3)); - } -} - -void loongson3_enable_clock(int cpu) -{ - uint64_t core_id = cpu_data[cpu].core; - uint64_t package_id = cpu_data[cpu].package; - - if (loongson_sysconf.cputype == Loongson_3A) { - LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id); - } else if (loongson_sysconf.cputype == Loongson_3B) { - if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) - LOONGSON_FREQCTRL(package_id) |= 1 << (core_id * 4 + 3); - } -} - -#define CPU_POST_DEAD_FROZEN (CPU_POST_DEAD | CPU_TASKS_FROZEN) -static int loongson3_cpu_callback(struct notifier_block *nfb, - unsigned long action, void *hcpu) -{ - unsigned int cpu = (unsigned long)hcpu; - - switch (action) { - case CPU_POST_DEAD: - case CPU_POST_DEAD_FROZEN: - pr_info("Disable clock for CPU#%d\n", cpu); - loongson3_disable_clock(cpu); - break; - case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: - pr_info("Enable clock for CPU#%d\n", cpu); - loongson3_enable_clock(cpu); - break; - } - - return NOTIFY_OK; -} - -static int register_loongson3_notifier(void) -{ - hotcpu_notifier(loongson3_cpu_callback, 0); - return 0; -} -early_initcall(register_loongson3_notifier); - -#endif - -struct plat_smp_ops loongson3_smp_ops = { - .send_ipi_single = loongson3_send_ipi_single, - .send_ipi_mask = loongson3_send_ipi_mask, - .init_secondary = loongson3_init_secondary, - .smp_finish = loongson3_smp_finish, - .boot_secondary = loongson3_boot_secondary, - .smp_setup = loongson3_smp_setup, - .prepare_cpus = loongson3_prepare_cpus, -#ifdef CONFIG_HOTPLUG_CPU - .cpu_disable = loongson3_cpu_disable, - .cpu_die = loongson3_cpu_die, -#endif -}; |