forked from Imagelibrary/rtems
278 lines
6.7 KiB
C
278 lines
6.7 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSBSPsSPARCLEON3
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*
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* @brief This header file provides interfaces used by the BSP implementation.
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*/
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/*
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* Copyright (C) 2014, 2021 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LIBBSP_SPARC_LEON3_BSP_LEON3_H
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#define LIBBSP_SPARC_LEON3_BSP_LEON3_H
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#include <grlib/apbuart-regs.h>
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#include <grlib/gptimer-regs.h>
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#include <bsp/irqimpl.h>
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#include <grlib/ambapp.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @addtogroup RTEMSBSPsSPARCLEON3
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*
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* @{
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*/
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/**
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* @brief This constant represents the flush instruction cache flag of the LEON
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* cache control register.
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*/
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#define LEON3_REG_CACHE_CTRL_FI 0x00200000U
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/**
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* @brief This constant represents the data cache snooping enable flag of the
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* LEON cache control register.
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*/
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#define LEON3_REG_CACHE_CTRL_DS 0x00800000U
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/**
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* @brief Sets the ASI 0x2 system register value.
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*
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* @param addr is the address of the ASI 0x2 system register.
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*
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* @param val is the value to set.
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*/
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static inline void leon3_set_system_register( uint32_t addr, uint32_t val )
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{
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__asm__ volatile(
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"sta %1, [%0] 2"
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:
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: "r" ( addr ), "r" ( val )
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);
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}
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/**
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* @brief Gets the ASI 0x2 system register value.
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*
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* @param addr is the address of the ASI 0x2 system register.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_get_system_register( uint32_t addr )
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{
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uint32_t val;
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__asm__ volatile(
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"lda [%1] 2, %0"
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: "=r" ( val )
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: "r" ( addr )
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);
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return val;
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}
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/**
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* @brief Sets the LEON cache control register value.
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*
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* @param val is the value to set.
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*/
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static inline void leon3_set_cache_control_register( uint32_t val )
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{
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leon3_set_system_register( 0x0, val );
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}
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/**
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* @brief Gets the LEON cache control register value.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_get_cache_control_register( void )
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{
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return leon3_get_system_register( 0x0 );
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}
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/**
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* @brief Checks if the data cache snooping is enabled.
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*
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* @return Returns true, if the data cache snooping is enabled, otherwise
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* false.
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*/
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static inline bool leon3_data_cache_snooping_enabled( void )
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{
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return ( leon3_get_cache_control_register() & LEON3_REG_CACHE_CTRL_DS ) != 0;
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}
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/**
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* @brief Gets the LEON instruction cache configuration register value.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_get_inst_cache_config_register( void )
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{
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return leon3_get_system_register( 0x8 );
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}
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/**
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* @brief Gets the LEON data cache configuration register value.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_get_data_cache_config_register( void )
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{
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return leon3_get_system_register( 0xc );
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}
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/**
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* @brief This constant defines the index of the GPTIMER timer used by the
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* clock driver.
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*/
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#if defined(RTEMS_MULTIPROCESSING)
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#define LEON3_CLOCK_INDEX \
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( rtems_configuration_get_user_multiprocessing_table() ? LEON3_Cpu_Index : 0 )
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#else
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#define LEON3_CLOCK_INDEX 0
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#endif
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/**
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* @brief This constant defines the index of the GPTIMER timer used by the
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* CPU counter if the CPU counter uses the GPTIMER.
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*/
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#if defined(RTEMS_SMP)
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#define LEON3_COUNTER_GPTIMER_INDEX ( LEON3_CLOCK_INDEX + 1 )
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#else
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#define LEON3_COUNTER_GPTIMER_INDEX LEON3_CLOCK_INDEX
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#endif
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/**
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* @brief This constant defines the frequency set by the boot loader of the
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* first GPTIMER instance.
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*
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* We assume that a boot loader (usually GRMON) initialized the GPTIMER 0 to
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* run with 1MHz. This is used to determine all clock frequencies of the PnP
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* devices. See also ambapp_freq_init() and ambapp_freq_get().
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*/
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#define LEON3_GPTIMER_0_FREQUENCY_SET_BY_BOOT_LOADER 1000000
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/**
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* @brief This pointer provides the GPTIMER register block address.
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*/
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extern gptimer *LEON3_Timer_Regs;
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/**
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* @brief This pointer provides the GPTIMER device information block.
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*/
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extern struct ambapp_dev *LEON3_Timer_Adev;
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/**
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* @brief Gets the LEON up-counter low register (%ASR23) value.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_up_counter_low( void )
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{
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uint32_t asr23;
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__asm__ volatile (
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"mov %%asr23, %0"
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: "=&r" (asr23)
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);
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return asr23;
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}
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/**
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* @brief Gets the LEON up-counter high register (%ASR22) value.
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*
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* @return Returns the register value.
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*/
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static inline uint32_t leon3_up_counter_high(void)
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{
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uint32_t asr22;
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__asm__ volatile (
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"mov %%asr22, %0"
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: "=&r" (asr22)
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);
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return asr22;
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}
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/**
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* @brief Enables the LEON up-counter.
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*/
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static inline void leon3_up_counter_enable( void )
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{
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__asm__ volatile (
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"mov %g0, %asr22"
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);
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}
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/**
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* @brief Checks if the LEON up-counter is available.
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*
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* The LEON up-counter must have been enabled.
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*
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* @return Returns true, if the LEON up-counter is available, otherwise false.
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*/
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static inline bool leon3_up_counter_is_available( void )
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{
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return leon3_up_counter_low() != leon3_up_counter_low();
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}
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/**
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* @brief Gets the LEON up-counter frequency in Hz.
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*
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* @return Returns the frequency.
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*/
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static inline uint32_t leon3_up_counter_frequency( void )
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{
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/*
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* For simplicity, assume that the interrupt controller uses the processor
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* clock. This is at least true on the GR740.
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*/
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return ambapp_freq_get( ambapp_plb(), LEON3_IrqCtrl_Adev );
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}
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/**
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* @brief This pointer provides the debug APBUART register block address.
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*/
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extern apbuart *leon3_debug_uart;
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LIBBSP_SPARC_LEON3_BSP_LEON3_H */
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