Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 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> |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 24 | #include <asm/dbell.h> |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 25 | |
| 26 | #include <sysdev/fsl_soc.h> |
| 27 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 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 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 54 | np = of_get_cpu_node(nr, NULL); |
| 55 | cpu_rel_addr = of_get_property(np, "cpu-release-addr", NULL); |
| 56 | |
| 57 | if (cpu_rel_addr == NULL) { |
| 58 | printk(KERN_ERR "No cpu-release-addr for cpu %d\n", nr); |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 59 | return; |
| 60 | } |
| 61 | |
| 62 | /* Map the spin table */ |
| 63 | bptr_vaddr = ioremap(*cpu_rel_addr, SIZE_BOOT_ENTRY); |
| 64 | |
Kumar Gala | cb1ffb620 | 2009-06-19 03:30:42 -0500 | [diff] [blame] | 65 | local_irq_save(flags); |
| 66 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 67 | out_be32(bptr_vaddr + BOOT_ENTRY_PIR, nr); |
| 68 | out_be32(bptr_vaddr + BOOT_ENTRY_ADDR_LOWER, __pa(__early_start)); |
| 69 | |
| 70 | /* Wait a bit for the CPU to ack. */ |
| 71 | while ((__secondary_hold_acknowledge != nr) && (++n < 1000)) |
| 72 | mdelay(1); |
| 73 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 74 | local_irq_restore(flags); |
| 75 | |
Kumar Gala | cb1ffb620 | 2009-06-19 03:30:42 -0500 | [diff] [blame] | 76 | iounmap(bptr_vaddr); |
| 77 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 78 | pr_debug("waited %d msecs for CPU #%d.\n", n, nr); |
| 79 | } |
| 80 | |
| 81 | static void __init |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 82 | smp_85xx_setup_cpu(int cpu_nr) |
| 83 | { |
| 84 | mpic_setup_this_cpu(); |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 85 | } |
| 86 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 87 | struct smp_ops_t smp_85xx_ops = { |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 88 | .kick_cpu = smp_85xx_kick_cpu, |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 89 | }; |
| 90 | |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 91 | void __init mpc85xx_smp_init(void) |
| 92 | { |
| 93 | struct device_node *np; |
| 94 | |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 95 | np = of_find_node_by_type(NULL, "open-pic"); |
| 96 | if (np) { |
| 97 | smp_85xx_ops.probe = smp_mpic_probe; |
| 98 | smp_85xx_ops.setup_cpu = smp_85xx_setup_cpu; |
| 99 | smp_85xx_ops.message_pass = smp_mpic_message_pass; |
Kumar Gala | 563fdd4 | 2009-02-11 22:50:42 -0600 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | if (cpu_has_feature(CPU_FTR_DBELL)) |
| 103 | smp_85xx_ops.message_pass = smp_dbell_message_pass; |
| 104 | |
| 105 | BUG_ON(!smp_85xx_ops.message_pass); |
| 106 | |
Kumar Gala | d5b26db | 2008-11-19 09:35:56 -0600 | [diff] [blame] | 107 | smp_ops = &smp_85xx_ops; |
| 108 | } |