| 0,0 → 1,108 |
|---|
| /* |
| * Copyright (c) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup sparc64 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <smp/smp.h> |
| #include <genarch/ofw/ofw_tree.h> |
| #include <cpu.h> |
| #include <arch/cpu.h> |
| #include <arch.h> |
| #include <config.h> |
| #include <macros.h> |
| #include <arch/types.h> |
| #include <synch/synch.h> |
| #include <synch/waitq.h> |
| #include <print.h> |
| |
| /** |
| * This global variable is used to pick-up application processors |
| * from their active loop in start.S. When a processor looping in |
| * start.S sees that this variable contains its MID, it can |
| * proceed with its initialization. |
| * |
| * This variable is modified only by the bootstrap processor. |
| * Other processors access it read-only. |
| */ |
| volatile uint64_t waking_up_mid = (uint64_t) -1; |
| |
| /** Determine number of processors. */ |
| void smp_init(void) |
| { |
| ofw_tree_node_t *node; |
| count_t cnt = 0; |
| |
| node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu"); |
| while (node) { |
| cnt++; |
| node = ofw_tree_find_peer_by_device_type(node, "cpu"); |
| } |
| |
| config.cpu_count = max(1, cnt); |
| } |
| |
| /** Wake application processors up. */ |
| void kmp(void *arg) |
| { |
| ofw_tree_node_t *node; |
| int i; |
| |
| node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu"); |
| for (i = 0; node; node = ofw_tree_find_peer_by_device_type(node, "cpu"), i++) { |
| uint32_t mid; |
| ofw_tree_property_t *prop; |
| |
| prop = ofw_tree_getprop(node, "upa-portid"); |
| if (!prop || !prop->value) |
| continue; |
| |
| mid = *((uint32_t *) prop->value); |
| if (CPU->arch.mid == mid) { |
| /* |
| * Skip the current CPU. |
| */ |
| continue; |
| } |
| |
| /* |
| * Processor with ID == mid can proceed with its initialization. |
| */ |
| waking_up_mid = mid; |
| |
| if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) |
| printf("%s: waiting for processor (mid = %" PRIu32 ") timed out\n", |
| __func__, mid); |
| } |
| } |
| |
| /** @} |
| */ |