projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 4ca4b627 JL |
1 | /* |
| 2 | * Author: Xianghua Xiao <x.xiao@freescale.com> | |
| 3 | * Zhang Wei <wei.zhang@freescale.com> | |
| 4 | * | |
| 5 | * Copyright 2006 Freescale Semiconductor Inc. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify it | |
| 8 | * under the terms of the GNU General Public License as published by the | |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 10 | * option) any later version. | |
| 11 | */ | |
| 12 | ||
| 4ca4b627 JL |
13 | #include <linux/stddef.h> |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/delay.h> | |
| 17 | ||
| aaddd3ea | 18 | #include <asm/code-patching.h> |
| 4ca4b627 | 19 | #include <asm/page.h> |
| f1a1eb29 | 20 | #include <asm/pgtable.h> |
| 4ca4b627 JL |
21 | #include <asm/pci-bridge.h> |
| 22 | #include <asm-powerpc/mpic.h> | |
| 23 | #include <asm/mpc86xx.h> | |
| 24 | #include <asm/cacheflush.h> | |
| 25 | ||
| 26 | #include <sysdev/fsl_soc.h> | |
| 27 | ||
| 28 | #include "mpc86xx.h" | |
| 29 | ||
| 30 | extern void __secondary_start_mpc86xx(void); | |
| 31 | extern unsigned long __secondary_hold_acknowledge; | |
| 32 | ||
| 33 | ||
| 34 | static void __init | |
| 35 | smp_86xx_release_core(int nr) | |
| 36 | { | |
| 9ad494f6 KG |
37 | __be32 __iomem *mcm_vaddr; |
| 38 | unsigned long pcr; | |
| 4ca4b627 JL |
39 | |
| 40 | if (nr < 0 || nr >= NR_CPUS) | |
| 41 | return; | |
| 42 | ||
| 43 | /* | |
| 44 | * Startup Core #nr. | |
| 45 | */ | |
| 46 | mcm_vaddr = ioremap(get_immrbase() + MPC86xx_MCM_OFFSET, | |
| 47 | MPC86xx_MCM_SIZE); | |
| 9ad494f6 | 48 | pcr = in_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2)); |
| 4ca4b627 | 49 | pcr |= 1 << (nr + 24); |
| 9ad494f6 | 50 | out_be32(mcm_vaddr + (MCM_PORT_CONFIG_OFFSET >> 2), pcr); |
| 4ca4b627 JL |
51 | } |
| 52 | ||
| 53 | ||
| 54 | static void __init | |
| 55 | smp_86xx_kick_cpu(int nr) | |
| 56 | { | |
| 57 | unsigned int save_vector; | |
| 58 | unsigned long target, flags; | |
| 59 | int n = 0; | |
| e7a57273 | 60 | unsigned int *vector = (unsigned int *)(KERNELBASE + 0x100); |
| 4ca4b627 JL |
61 | |
| 62 | if (nr < 0 || nr >= NR_CPUS) | |
| 63 | return; | |
| 64 | ||
| 65 | pr_debug("smp_86xx_kick_cpu: kick CPU #%d\n", nr); | |
| 66 | ||
| 67 | local_irq_save(flags); | |
| 4ca4b627 JL |
68 | |
| 69 | /* Save reset vector */ | |
| 70 | save_vector = *vector; | |
| 71 | ||
| 72 | /* Setup fake reset vector to call __secondary_start_mpc86xx. */ | |
| 73 | target = (unsigned long) __secondary_start_mpc86xx; | |
| e7a57273 | 74 | patch_branch(vector, target, BRANCH_SET_LINK); |
| 4ca4b627 JL |
75 | |
| 76 | /* Kick that CPU */ | |
| 77 | smp_86xx_release_core(nr); | |
| 78 | ||
| 79 | /* Wait a bit for the CPU to take the exception. */ | |
| 80 | while ((__secondary_hold_acknowledge != nr) && (n++, n < 1000)) | |
| 81 | mdelay(1); | |
| 82 | ||
| 83 | /* Restore the exception vector */ | |
| 84 | *vector = save_vector; | |
| 85 | flush_icache_range((unsigned long) vector, (unsigned long) vector + 4); | |
| 86 | ||
| 87 | local_irq_restore(flags); | |
| 88 | ||
| 89 | pr_debug("wait CPU #%d for %d msecs.\n", nr, n); | |
| 90 | } | |
| 91 | ||
| 92 | ||
| 93 | static void __init | |
| 94 | smp_86xx_setup_cpu(int cpu_nr) | |
| 95 | { | |
| 96 | mpic_setup_this_cpu(); | |
| 97 | } | |
| 98 | ||
| 99 | ||
| 100 | struct smp_ops_t smp_86xx_ops = { | |
| 101 | .message_pass = smp_mpic_message_pass, | |
| 102 | .probe = smp_mpic_probe, | |
| 103 | .kick_cpu = smp_86xx_kick_cpu, | |
| 104 | .setup_cpu = smp_86xx_setup_cpu, | |
| 105 | .take_timebase = smp_generic_take_timebase, | |
| 106 | .give_timebase = smp_generic_give_timebase, | |
| 107 | }; | |
| 108 | ||
| 109 | ||
| 110 | void __init | |
| 111 | mpc86xx_smp_init(void) | |
| 112 | { | |
| 113 | smp_ops = &smp_86xx_ops; | |
| 114 | } |