Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights |
| 3 | * reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the NetLogic |
| 9 | * license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in |
| 19 | * the documentation and/or other materials provided with the |
| 20 | * distribution. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 24 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 30 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 31 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 32 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/threads.h> |
| 38 | |
| 39 | #include <asm/asm.h> |
| 40 | #include <asm/asm-offsets.h> |
| 41 | #include <asm/mipsregs.h> |
| 42 | #include <asm/addrspace.h> |
| 43 | #include <asm/string.h> |
| 44 | |
| 45 | #include <asm/netlogic/haldefs.h> |
| 46 | #include <asm/netlogic/common.h> |
| 47 | #include <asm/netlogic/mips-extns.h> |
| 48 | |
| 49 | #include <asm/netlogic/xlp-hal/iomap.h> |
| 50 | #include <asm/netlogic/xlp-hal/pic.h> |
| 51 | #include <asm/netlogic/xlp-hal/xlp.h> |
| 52 | #include <asm/netlogic/xlp-hal/sys.h> |
| 53 | |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 54 | static void xlp_enable_secondary_cores(void) |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 55 | { |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 56 | uint32_t core, value, coremask, syscoremask; |
| 57 | int count; |
| 58 | |
| 59 | /* read cores in reset from SYS block */ |
| 60 | syscoremask = nlm_read_sys_reg(nlm_sys_base, SYS_CPU_RESET); |
| 61 | |
| 62 | /* update user specified */ |
| 63 | nlm_coremask = nlm_coremask & (syscoremask | 1); |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 64 | |
| 65 | for (core = 1; core < 8; core++) { |
| 66 | coremask = 1 << core; |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 67 | if ((nlm_coremask & coremask) == 0) |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 68 | continue; |
| 69 | |
| 70 | /* Enable CPU clock */ |
| 71 | value = nlm_read_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIS_CTRL); |
| 72 | value &= ~coremask; |
| 73 | nlm_write_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIS_CTRL, value); |
| 74 | |
| 75 | /* Remove CPU Reset */ |
| 76 | value = nlm_read_sys_reg(nlm_sys_base, SYS_CPU_RESET); |
| 77 | value &= ~coremask; |
| 78 | nlm_write_sys_reg(nlm_sys_base, SYS_CPU_RESET, value); |
| 79 | |
| 80 | /* Poll for CPU to mark itself coherent */ |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 81 | count = 100000; |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 82 | do { |
| 83 | value = nlm_read_sys_reg(nlm_sys_base, |
| 84 | SYS_CPU_NONCOHERENT_MODE); |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 85 | } while ((value & coremask) != 0 && count-- > 0); |
| 86 | |
| 87 | if (count == 0) |
| 88 | pr_err("Failed to enable core %d\n", core); |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 89 | } |
| 90 | } |
| 91 | |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 92 | void xlp_wakeup_secondary_cpus(void) |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 93 | { |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 94 | /* |
| 95 | * In case of u-boot, the secondaries are in reset |
| 96 | * first wakeup core 0 threads |
| 97 | */ |
| 98 | xlp_boot_core0_siblings(); |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 99 | |
Jayachandran C | 66d2998 | 2011-11-16 00:21:29 +0000 | [diff] [blame^] | 100 | /* now get other cores out of reset */ |
| 101 | xlp_enable_secondary_cores(); |
Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame] | 102 | } |