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Replace portasmHAS_CLINT with configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS definitions in the GCC RISC-V port - portasmHAS_CLIT will still work by deriving the new definitions from the old.

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This commit is contained in:
Richard Barry 2020-01-07 01:14:36 +00:00
parent eaf9318df8
commit fbb23055cd
5 changed files with 49 additions and 17 deletions
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2
FreeRTOS/Source/portable/GCC/RISC-V/chip_specific_extensions/Pulpino_Vega_RV32M1RM/freertos_risc_v_chip_specific_extensions.h
View file

@ -59,7 +59,7 @@
#ifndef __FREERTOS_RISC_V_EXTENSIONS_H__
#define __FREERTOS_RISC_V_EXTENSIONS_H__
#define portasmHAS_CLINT 0
#define portasmHAS_MTIME 0
/* Constants to define the additional registers found on the Pulpino RI5KY. */
#define lpstart0 0x7b0

2
FreeRTOS/Source/portable/GCC/RISC-V/chip_specific_extensions/RV32I_CLINT_no_extensions/freertos_risc_v_chip_specific_extensions.h
View file

@ -53,7 +53,7 @@
#ifndef __FREERTOS_RISC_V_EXTENSIONS_H__
#define __FREERTOS_RISC_V_EXTENSIONS_H__
#define portasmHAS_CLINT 1
#define portasmHAS_MTIME 1
#define portasmADDITIONAL_CONTEXT_SIZE 0 /* Must be even number on 32-bit cores. */
.macro portasmSAVE_ADDITIONAL_REGISTERS

28
FreeRTOS/Source/portable/GCC/RISC-V/port.c
View file

@ -37,8 +37,16 @@
/* Standard includes. */
#include "string.h"
#ifndef configCLINT_BASE_ADDRESS
#warning configCLINT_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a Core Local Interrupter (CLINT) then set configCLINT_BASE_ADDRESS to the CLINT base address. Otherwise set configCLINT_BASE_ADDRESS to 0.
#ifdef configCLINT_BASE_ADDRESS
#warning The configCLINT_BASE_ADDRESS constant has been deprecated. configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS are currently being derived from configCLINT_BASE_ADDRESS. Please update to define configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS dirctly in place of configCLINT_BASE_ADDRESS.
#endif
#ifndef configMTIME_BASE_ADDRESS
#warning configMTIME_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtime register then set configMTIME_BASE_ADDRESS to the mapped address. Otherwise set configMTIME_BASE_ADDRESS to 0.
#endif
#ifndef configMTIMECMP_BASE_ADDRESS
#warning configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. If the target chip includes a memory-mapped mtimecmp register then set configMTIMECMP_BASE_ADDRESS to the mapped address. Otherwise set configMTIMECMP_BASE_ADDRESS to 0.
#endif
/* Let the user override the pre-loading of the initial LR with the address of
@ -83,7 +91,7 @@ void vPortSetupTimerInterrupt( void ) __attribute__(( weak ));
uint64_t ullNextTime = 0ULL;
const uint64_t *pullNextTime = &ullNextTime;
const size_t uxTimerIncrementsForOneTick = ( size_t ) ( ( configCPU_CLOCK_HZ ) / ( configTICK_RATE_HZ ) ); /* Assumes increment won't go over 32-bits. */
uint32_t const ullMachineTimerCompareRegisterBase = ( uint64_t const ) ( ( configCLINT_BASE_ADDRESS ) + 0x4000 );
uint32_t const ullMachineTimerCompareRegisterBase = configMTIMECMP_BASE_ADDRESS;
volatile uint64_t * pullMachineTimerCompareRegister = NULL;
/* Set configCHECK_FOR_STACK_OVERFLOW to 3 to add ISR stack checking to task
@ -108,13 +116,13 @@ task stack, not the ISR stack). */
/*-----------------------------------------------------------*/
#if( configCLINT_BASE_ADDRESS != 0 )
#if( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 )
void vPortSetupTimerInterrupt( void )
{
uint32_t ulCurrentTimeHigh, ulCurrentTimeLow;
volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( configCLINT_BASE_ADDRESS + 0xBFFC );
volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configCLINT_BASE_ADDRESS + 0xBFF8 );
volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( ( configMTIME_BASE_ADDRESS ) + 4UL ); /* 8-byte typer so high 32-bit word is 4 bytes up. */
volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configMTIME_BASE_ADDRESS );
volatile uint32_t ulHartId;
__asm volatile( "csrr %0, mhartid" : "=r"( ulHartId ) );
@ -127,7 +135,7 @@ task stack, not the ISR stack). */
} while( ulCurrentTimeHigh != *pulTimeHigh );
ullNextTime = ( uint64_t ) ulCurrentTimeHigh;
ullNextTime <<= 32ULL;
ullNextTime <<= 32ULL; /* High 4-byte word is 32-bits up. */
ullNextTime |= ( uint64_t ) ulCurrentTimeLow;
ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
*pullMachineTimerCompareRegister = ullNextTime;
@ -136,7 +144,7 @@ task stack, not the ISR stack). */
ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
}
#endif /* ( configCLINT_BASE_ADDRESS != 0 ) */
#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIME_BASE_ADDRESS != 0 ) */
/*-----------------------------------------------------------*/
BaseType_t xPortStartScheduler( void )
@ -170,7 +178,7 @@ extern void xPortStartFirstTask( void );
configure whichever clock is to be used to generate the tick interrupt. */
vPortSetupTimerInterrupt();
#if( configCLINT_BASE_ADDRESS != 0 )
#if( ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) )
{
/* Enable mtime and external interrupts. 1<<7 for timer interrupt, 1<<11
for external interrupt. _RB_ What happens here when mtime is not present as
@ -182,7 +190,7 @@ extern void xPortStartFirstTask( void );
/* Enable external interrupts. */
__asm volatile( "csrs mie, %0" :: "r"(0x800) );
}
#endif /* configCLINT_BASE_ADDRESS */
#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) */
xPortStartFirstTask();

19
FreeRTOS/Source/portable/GCC/RISC-V/portASM.S
View file

@ -71,8 +71,17 @@
/* Check the freertos_risc_v_chip_specific_extensions.h and/or command line
definitions. */
#ifndef portasmHAS_CLINT
#error freertos_risc_v_chip_specific_extensions.h must define portasmHAS_CLINT to either 1 (CLINT present) or 0 (clint not present).
#if defined( portasmHAS_CLINT ) && defined( portasmHAS_MTIME )
#error The portasmHAS_CLINT constant has been depracted. Please replace it with portasmHAS_CLINT. portasmHAS_CLINT and portasmHAS_MTIME cannot both be defined at once.
#endif
#ifdef portasmHAS_CLINT
#warning The portasmHAS_CLINT constant has been depracted. Please replace it with portasmHAS_CLINT. For now portasmHAS_MTIME is derived from portasmHAS_CLINT.
#define portasmHAS_MTIME portasmHAS_CLINT
#endif
#ifndef portasmHAS_MTIME
#error freertos_risc_v_chip_specific_extensions.h must define portasmHAS_MTIME to either 1 (MTIME clock present) or 0 (MTIME clock not present).
#endif
#ifndef portasmHANDLE_INTERRUPT
@ -153,7 +162,7 @@ test_if_asynchronous:
handle_asynchronous:
#if( portasmHAS_CLINT != 0 )
#if( portasmHAS_MTIME != 0 )
test_if_mtimer: /* If there is a CLINT then the mtimer is used to generate the tick interrupt. */
@ -205,7 +214,7 @@ handle_asynchronous:
addi t1, t1, 4 /* 0x80000007 + 4 = 0x8000000b == Machine external interrupt. */
bne a0, t1, as_yet_unhandled /* Something as yet unhandled. */
#endif /* portasmHAS_CLINT */
#endif /* portasmHAS_MTIME */
load_x sp, xISRStackTop /* Switch to ISR stack before function call. */
jal portasmHANDLE_INTERRUPT /* Jump to the interrupt handler if there is no CLINT or if there is a CLINT and it has been determined that an external interrupt is pending. */
@ -284,7 +293,7 @@ processed_source:
.func
xPortStartFirstTask:
#if( portasmHAS_CLINT != 0 )
#if( portasmHAS_MTIME != 0 )
/* If there is a clint then interrupts can branch directly to the FreeRTOS
trap handler. Otherwise the interrupt controller will need to be configured
outside of this file. */

15
FreeRTOS/Source/portable/GCC/RISC-V/portmacro.h
View file

@ -153,6 +153,21 @@ not necessary for to use this port. They are defined so the common demo files
#endif
#define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )
/*-----------------------------------------------------------*/
/* configCLINT_BASE_ADDRESS is a legacy definition that was replaced by the
configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS definitions. For
backward compatibility derive the newer definitions from the old if the old
definition is found. */
#if defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS )
#define configMTIME_BASE_ADDRESS ( ( configCLINT_BASE_ADDRESS ) + 0xBFF8UL )
#define configMTIMECMP_BASE_ADDRESS ( ( configCLINT_BASE_ADDRESS ) + 0x4000UL )
#elif !defined( configMTIME_BASE_ADDRESS ) || !defined( configMTIMECMP_BASE_ADDRESS )
#error configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h. See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html
#endif
#ifdef __cplusplus
}