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quark se arc: irq static initialization support.

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Adds static irq support for the Quark SE platform for the ARC core.

New linker sections and sw isr table initialization is needed to support
static IRQ.

Change-Id: I82af98a189f5a156e7f1018f3ecdbfa73ad3e6ef
Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@linux.intel.com>
This commit is contained in:
Juan Manuel Cruz 2015-11-24 17:17:43 -06:00 • committed by Anas Nashif
commit b51b3da133
3 changed files with 77 additions and 46 deletions
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64
arch/arc/platforms/quark_se_ss/sw_isr_table.S Normal file
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@ -0,0 +1,64 @@
/* sw_isr_table.S - ISR table for static ISR declarations for ARC */
/*
* Copyright (c) 2015 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _ASMLANGUAGE
#include <toolchain.h>
#include <sections.h>
#include <arch/cpu.h>
/*
* enable proprocessor features, such
* as %expr - evaluate the expression and use it as a string
*/
.altmacro
/*
* Define an ISR table entry
* Define symbol as weak and give the section .gnu.linkonce
* prefix. This allows linker overload the symbol and the
* whole section by the one defined by a device driver
*/
.macro _isr_table_entry_declare index
WDATA(_isr_irq\index)
.section .gnu.linkonce.isr_irq\index
_isr_irq\index: .word 0xABAD1DEA, _irq_spurious
.endm
/*
* Declare the ISR table
* Macro is recursive
*/
.macro _isr_table_declare from, to
_isr_table_entry_declare \from
.if \to-\from
_isr_table_declare %(\from + 1), \to
.endif
.endm
GTEXT(_irq_spurious)
GDATA(_sw_isr_table)
.section .isr_irq16
.align
_sw_isr_table:
/*In ARC architecture, IRQ 0-15 are reserved for the system and are not
assignable by the user, for that reason the isr table linker section
start at IRQ 16*/
_isr_table_declare 16 CONFIG_NUM_IRQS+15

46
arch/arc/platforms/quark_se_ss/sw_isr_table.c
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@ -1,46 +0,0 @@
/* sw_isr_table.c - Software ISR table for quark_se_ss BSP */
/*
* Copyright (c) 2014 Wind River Systems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* This contains the ISR table meant to be used for ISRs that take a parameter.
* It is also used when ISRs are to be connected at runtime, and in this case
* provides a table that is filled with _SpuriousIRQ bindings.
*/
#include <toolchain.h>
#include <sections.h>
#include <sw_isr_table.h>
extern void _irq_spurious(void *arg);
#if defined(CONFIG_SW_ISR_TABLE_DYNAMIC)
_IsrTableEntry_t __isr_table_section _sw_isr_table[CONFIG_NUM_IRQS] = {
[0 ...(CONFIG_NUM_IRQS - 1)].arg = (void *)0xABAD1DEA,
[0 ...(CONFIG_NUM_IRQS - 1)].isr = _irq_spurious
};
#else
#if defined(CONFIG_SW_ISR_TABLE)
#if !defined(CONFIG_SW_ISR_TABLE_STATIC_CUSTOM)
/* placeholders: fill with real ISRs */
#endif
#endif
#endif

13
include/arch/arc/v2/linker.cmd
View file

@ -123,6 +123,19 @@ SECTIONS {
__data_ram_start = .;
*(.data)
*(".data.*")
KEEP(*(.isr_irq*))
/*The following sections maps the location of the different rows for
the _sw_isr_table. Each row maps to an IRQ entry (handler, argument).*/
/*In ARC architecture, IRQ 0-15 are reserved for the system and are not
assignable by the user, for that reason the linker sections start
on IRQ 16*/
/* sections for IRQ16-19 */
KEEP(*(SORT(.gnu.linkonce.isr_irq[1][6-9])))
/* sections for IRQ20-99 */
KEEP(*(SORT(.gnu.linkonce.isr_irq[2-9][0-9])))
/* sections for IRQ100-999 */
KEEP(*(SORT(.gnu.linkonce.isr_irq[1-9][0-9][0-9])))
} GROUP_LINK_IN(RAMABLE_REGION)
SECTION_PROLOGUE(initlevel, (OPTIONAL),)