projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d5b26db2 KG |
1 | /* |
| 2 | * Author: Andy Fleming <afleming@freescale.com> | |
| 3 | * Kumar Gala <galak@kernel.crashing.org> | |
| 4 | * | |
| 5 | * Copyright 2006-2008 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 | ||
| 13 | #include <linux/stddef.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/delay.h> | |
| 17 | #include <linux/of.h> | |
| 18 | ||
| 19 | #include <asm/machdep.h> | |
| 20 | #include <asm/pgtable.h> | |
| 21 | #include <asm/page.h> | |
| 22 | #include <asm/mpic.h> | |
| 23 | #include <asm/cacheflush.h> | |
| 24 | ||
| 25 | #include <sysdev/fsl_soc.h> | |
| 26 | ||
| 27 | extern volatile unsigned long __secondary_hold_acknowledge; | |
| 28 | extern void __early_start(void); | |
| 29 | ||
| 30 | #define BOOT_ENTRY_ADDR_UPPER 0 | |
| 31 | #define BOOT_ENTRY_ADDR_LOWER 1 | |
| 32 | #define BOOT_ENTRY_R3_UPPER 2 | |
| 33 | #define BOOT_ENTRY_R3_LOWER 3 | |
| 34 | #define BOOT_ENTRY_RESV 4 | |
| 35 | #define BOOT_ENTRY_PIR 5 | |
| 36 | #define BOOT_ENTRY_R6_UPPER 6 | |
| 37 | #define BOOT_ENTRY_R6_LOWER 7 | |
| 38 | #define NUM_BOOT_ENTRY 8 | |
| 39 | #define SIZE_BOOT_ENTRY (NUM_BOOT_ENTRY * sizeof(u32)) | |
| 40 | ||
| 41 | static void __init | |
| 42 | smp_85xx_kick_cpu(int nr) | |
| 43 | { | |
| 44 | unsigned long flags; | |
| 45 | const u64 *cpu_rel_addr; | |
| 46 | __iomem u32 *bptr_vaddr; | |
| 47 | struct device_node *np; | |
| 48 | int n = 0; | |
| 49 | ||
| 50 | WARN_ON (nr < 0 || nr >= NR_CPUS); | |
| 51 | ||
| 52 | pr_debug("smp_85xx_kick_cpu: kick CPU #%d\n", nr); | |
| 53 | ||
| 54 | local_irq_save(flags); | |
| 55 | ||
| 56 | np = of_get_cpu_node(nr, NULL); | |
| 57 | cpu_rel_addr = of_get_property(np, "cpu-release-addr", NULL); | |
| 58 | ||
| 59 | if (cpu_rel_addr == NULL) { | |
| 60 | printk(KERN_ERR "No cpu-release-addr for cpu %d\n", nr); | |
| 870029a6 | 61 | local_irq_restore(flags); |
| d5b26db2 KG |
62 | return; |
| 63 | } | |
| 64 | ||
| 65 | /* Map the spin table */ | |
| 66 | bptr_vaddr = ioremap(*cpu_rel_addr, SIZE_BOOT_ENTRY); | |
| 67 | ||
| 68 | out_be32(bptr_vaddr + BOOT_ENTRY_PIR, nr); | |
| 69 | out_be32(bptr_vaddr + BOOT_ENTRY_ADDR_LOWER, __pa(__early_start)); | |
| 70 | ||
| 71 | /* Wait a bit for the CPU to ack. */ | |
| 72 | while ((__secondary_hold_acknowledge != nr) && (++n < 1000)) | |
| 73 | mdelay(1); | |
| 74 | ||
| 75 | iounmap(bptr_vaddr); | |
| 76 | ||
| 77 | local_irq_restore(flags); | |
| 78 | ||
| 79 | pr_debug("waited %d msecs for CPU #%d.\n", n, nr); | |
| 80 | } | |
| 81 | ||
| 82 | static void __init | |
| 83 | smp_85xx_setup_cpu(int cpu_nr) | |
| 84 | { | |
| 85 | mpic_setup_this_cpu(); | |
| 86 | ||
| 87 | /* Clear any pending timer interrupts */ | |
| 88 | mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS); | |
| 89 | ||
| 90 | /* Enable decrementer interrupt */ | |
| 91 | mtspr(SPRN_TCR, TCR_DIE); | |
| 92 | } | |
| 93 | ||
| 94 | struct smp_ops_t smp_85xx_ops = { | |
| 95 | .message_pass = smp_mpic_message_pass, | |
| 96 | .probe = smp_mpic_probe, | |
| 97 | .kick_cpu = smp_85xx_kick_cpu, | |
| 98 | .setup_cpu = smp_85xx_setup_cpu, | |
| 99 | }; | |
| 100 | ||
| 101 | void __init | |
| 102 | mpc85xx_smp_init(void) | |
| 103 | { | |
| 104 | smp_ops = &smp_85xx_ops; | |
| 105 | } |