57f2741e4f
Put initialization priorities as device driver Kconfig parameter. Initialization priority value for each platform is defined in the platform Kconfig file. Drivers and platform code use SYS_DEFINE_DEVICE to add and initialization function. Change-Id: I2f4f3c7370dac02408a1b50a0a1bade8b427a282 Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com> Signed-off-by: Anas Nashif <anas.nashif@intel.com>
108 lines
3 KiB
C
108 lines
3 KiB
C
/* system.c - system/hardware module for the Quark SE BSP */
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/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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DESCRIPTION
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This module provides routines to initialize and support board-level
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hardware for the Quark SE BSP.
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*/
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#include <nanokernel.h>
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#include <misc/printk.h>
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#include <misc/__assert.h>
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#include "board.h"
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#include <uart.h>
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#include <drivers/ioapic.h>
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#include <drivers/loapic.h>
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#include <init.h>
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#include <shared_mem.h>
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#ifdef CONFIG_ARC_INIT
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#define SCSS_REG_VAL(offset) \
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(*((volatile uint32_t *)(SCSS_REGISTER_BASE+offset)))
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#ifdef CONFIG_ARC_INIT_DEBUG
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#define arc_init_debug printk
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#else
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#define arc_init_debug(x...) do { } while (0)
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#endif
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/**
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*
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* @brief ARC Init
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*
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* This routine initialize the ARC reset vector and
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* starts the ARC processor.
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* @return N/A
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*/
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static int arc_init(struct device *arg)
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{
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uint32_t *reset_vector;
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ARG_UNUSED(arg);
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if (!SCSS_REG_VAL(SCSS_SS_STS)) {
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/* ARC shouldn't already be running! */
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printk("ARC core already running!");
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return DEV_FAIL;
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}
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/* Address of ARC side __reset stored in the first 4 bytes of arc.bin,
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* we read the value and stick it in shared_mem->arc_start which is
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* the beginning of the address space at 0xA8000000 */
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reset_vector = (uint32_t *)RESET_VECTOR;
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arc_init_debug("Reset vector address: %x\n", *reset_vector);
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shared_data->arc_start = *reset_vector;
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shared_data->flags = 0;
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#ifndef CONFIG_ARC_INIT_DEBUG
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/* Start the CPU */
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SCSS_REG_VAL(SCSS_SS_CFG) |= ARC_RUN_REQ_A;
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arc_init_debug("Waiting for arc to start...\n");
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/* Block until the ARC core actually starts up */
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while (SCSS_REG_VAL(SCSS_SS_STS) & 0x4000) {
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}
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/* Block until ARC's quark_se_init() sets a flag indicating it is ready,
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* if we get stuck here ARC has run but has exploded very early */
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arc_init_debug("Waiting for arc to init...\n");
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while (!shared_data->flags & ARC_READY) {
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}
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#endif
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return DEV_OK;
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}
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DECLARE_DEVICE_INIT_CONFIG(quark_se_ss_0, "", arc_init, NULL);
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SYS_DEFINE_DEVICE(quark_se_ss_0, NULL, SECONDARY,
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CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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#endif /*CONFIG_ARC_INIT*/
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#ifdef CONFIG_IOAPIC
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DECLARE_DEVICE_INIT_CONFIG(ioapic_0, "", _ioapic_init, NULL);
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SYS_DEFINE_DEVICE(ioapic_0, NULL, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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#endif /* CONFIG_IOAPIC */
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#ifdef CONFIG_LOAPIC
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DECLARE_DEVICE_INIT_CONFIG(loapic_0, "", _loapic_init, NULL);
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SYS_DEFINE_DEVICE(loapic_0, NULL, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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#endif /* CONFIG_LOAPIC */
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