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https://github.com/zephyrproject-rtos/zephyr
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07160fa153
SPARC is an open and royalty free processor architecture. This commit provides SPARC architecture support to Zephyr. It is compatible with the SPARC V8 specification and the SPARC ABI and is independent of processor implementation. Functionality specific to SPRAC processor implementations should go in soc/sparc. One example is the LEON3 SOC which is part of this patch set. The architecture port is fully SPARC ABI compatible, including trap handlers and interrupt context. Number of implemented register windows can be configured. Some SPARC V8 processors borrow the CASA (compare-and-swap) atomic instructions from SPARC V9. An option has been defined in the architecture port to forward the corresponding code-generation option to the compiler. Stack size related config options have been defined in sparc/Kconfig to match the SPARC ABI. Co-authored-by: Nikolaus Huber <nikolaus.huber.melk@gmail.com> Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
/*
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* Copyright (c) 2019-2020 Cobham Gaisler AB
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Per-arch thread definition
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*
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* This file contains definitions for
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*
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* struct _thread_arch
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* struct _callee_saved
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*
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* necessary to instantiate instances of struct k_thread.
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_SPARC_THREAD_H_
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#define ZEPHYR_INCLUDE_ARCH_SPARC_THREAD_H_
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#ifndef _ASMLANGUAGE
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#include <zephyr/types.h>
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/*
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* The following structure defines the list of registers that need to be
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* saved/restored when a cooperative context switch occurs.
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*/
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struct _callee_saved {
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/* y register used by mul/div */
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uint32_t y;
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/* processor status register */
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uint32_t psr;
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/*
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* local registers
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*
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* Using uint64_t l0_and_l1 will put everything in this structure on a
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* double word boundary which allows us to use double word loads and
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* stores safely in the context switch.
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*/
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uint64_t l0_and_l1;
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uint32_t l2;
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uint32_t l3;
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uint32_t l4;
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uint32_t l5;
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uint32_t l6;
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uint32_t l7;
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/* input registers */
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uint32_t i0;
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uint32_t i1;
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uint32_t i2;
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uint32_t i3;
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uint32_t i4;
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uint32_t i5;
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uint32_t i6; /* frame pointer */
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uint32_t i7;
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/* output registers */
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uint32_t o6; /* stack pointer */
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uint32_t o7;
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};
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typedef struct _callee_saved _callee_saved_t;
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struct _thread_arch {
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/* empty */
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};
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typedef struct _thread_arch _thread_arch_t;
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_INCLUDE_ARCH_SPARC_THREAD_H_ */
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