Changeset 455
- Timestamp:
- Dec 5, 2014, 3:34:16 PM (10 years ago)
- Location:
- soft/giet_vm/giet_common
- Files:
-
- 4 added
- 4 edited
Legend:
- Unmodified
- Added
- Removed
-
soft/giet_vm/giet_common/pmem.c
r442 r455 6 6 /////////////////////////////////////////////////////////////////////////////////// 7 7 8 #include <tty0.h> 8 9 #include <utils.h> 9 10 #include <pmem.h> -
soft/giet_vm/giet_common/utils.c
r442 r455 6 6 /////////////////////////////////////////////////////////////////////////////////// 7 7 // The utils.c and utils.h files are part of the GIET-VM nano-kernel. 8 // They define more or less the GIET-VM HAL (Hardware Abstraction Layer),9 // and contains various utility functions, that can be used by both the10 // boot code and the kernel code.11 8 /////////////////////////////////////////////////////////////////////////////////// 12 9 13 10 #include <utils.h> 11 #include <tty0.h> 14 12 #include <giet_config.h> 15 13 #include <hard_config.h> … … 411 409 } 412 410 413 ///////////////////////////////////////////////////////////////////////////////////414 // Locks access functions415 ///////////////////////////////////////////////////////////////////////////////////416 417 ///////////////////////////////////418 void _get_lock( giet_lock_t* lock )419 {420 register unsigned int* plock = &(lock->value);421 422 #if NO_HARD_CC423 424 register unsigned int delay = (_get_proctime() ^ _get_procid() << 4) & 0xFF;425 if (delay == 0) delay = 0x80;426 427 asm volatile (428 "_lock_llsc: \n"429 " ll $2, 0(%0) \n" /* $2 <= lock current value */430 " bnez $2, _lock_delay \n" /* delay if lock already taken */431 " li $3, 1 \n" /* $3 <= argument for sc */432 " sc $3, 0(%0) \n" /* try to set lock */433 " bnez $3, _lock_ok \n" /* exit if atomic */434 " _lock_delay: \n"435 " move $4, %1 \n" /* $4 <= delay */436 " _lock_loop: \n"437 " addi $4, $4, -1 \n" /* $4 <= $4 - 1 */438 " bnez $4, _lock_loop \n" /* test end delay */439 " nop \n"440 " j _lock_llsc \n" /* retry */441 " nop \n"442 " _lock_ok: \n"443 :444 :"r"(plock), "r"(delay)445 :"$2", "$3", "$4", "memory");446 #else447 448 asm volatile (449 "_lock_llsc: \n"450 " lw $2, 0(%0) \n" /* $2 <= lock current value */451 " bnez $2, _lock_llsc \n" /* retry if lock already taken */452 " nop \n"453 " ll $2, 0(%0) \n" /* ll_buffer <= lock current value */454 " bnez $2, _lock_llsc \n" /* retry if lock already taken */455 " li $3, 1 \n" /* $3 <= argument for sc */456 " sc $3, 0(%0) \n" /* try to set lock */457 " beqz $3, _lock_llsc \n" /* retry if sc failure */458 " nop \n"459 :460 :"r"(plock)461 :"$2", "$3", "memory");462 #endif463 464 }465 466 ///////////////////////////////////////467 void _release_lock( giet_lock_t* lock )468 {469 asm volatile ( "sync\n" ::: "memory" );470 // sync is necessary because of the TSAR consistency model471 lock->value = 0;472 }473 474 ///////////////////////////////////////////////////////////////////////////////////475 // Access functions to kernel terminal TTY0476 ///////////////////////////////////////////////////////////////////////////////////477 478 //////////////////////////479 void _puts( char* string )480 {481 unsigned int n = 0;482 483 while ( string[n] > 0 )484 {485 // test status register486 while ( (_tty_get_register( 0, TTY_STATUS ) & 0x2) );487 488 // write one byte489 if ( string[n] == '\n') {490 _tty_set_register( 0, TTY_WRITE, (unsigned int)'\r' );491 }492 _tty_set_register( 0, TTY_WRITE, (unsigned int)string[n] );493 n++;494 }495 }496 497 //////////////////////////////498 void _putx( unsigned int val )499 {500 static const char HexaTab[] = "0123456789ABCDEF";501 char buf[11];502 unsigned int c;503 504 buf[0] = '0';505 buf[1] = 'x';506 buf[10] = 0;507 508 for (c = 0; c < 8; c++)509 {510 buf[9 - c] = HexaTab[val & 0xF];511 val = val >> 4;512 }513 _puts( buf );514 }515 516 ////////////////////////////////////517 void _putl( unsigned long long val )518 {519 static const char HexaTab[] = "0123456789ABCDEF";520 char buf[19];521 unsigned int c;522 523 buf[0] = '0';524 buf[1] = 'x';525 buf[18] = 0;526 527 for (c = 0; c < 16; c++)528 {529 buf[17 - c] = HexaTab[(unsigned int)val & 0xF];530 val = val >> 4;531 }532 _puts( buf );533 }534 535 //////////////////////////////536 void _putd( unsigned int val )537 {538 static const char DecTab[] = "0123456789";539 char buf[11];540 unsigned int i;541 unsigned int first = 0;542 543 buf[10] = 0;544 545 for (i = 0; i < 10; i++)546 {547 if ((val != 0) || (i == 0))548 {549 buf[9 - i] = DecTab[val % 10];550 first = 9 - i;551 }552 else553 {554 break;555 }556 val /= 10;557 }558 _puts( &buf[first] );559 }560 561 /////////////////////////562 void _getc( char* byte )563 {564 // test status register565 while ( _tty_get_register( 0, TTY_STATUS ) == 0 );566 567 // read one byte568 *byte = (char)_tty_get_register( 0, TTY_READ );569 }570 411 571 412 … … 767 608 _puts(","); 768 609 _putd( lpid ); 769 _puts("] exit at cycle ");610 _puts("] exit at cycle "); 770 611 _putd( _get_proctime() ); 771 612 _puts(" ...\n"); -
soft/giet_vm/giet_common/utils.h
r442 r455 6 6 /////////////////////////////////////////////////////////////////////////////////// 7 7 // The utils.c and utils.h files are part of the GIET-VM nano-kernel. 8 // They define more or less the GIET-VM Hardware Abstraction Layer, 9 // and contains various utility functions, that can be used by both the 8 // They define various utility functions, that can be used by both the 10 9 // boot code and the kernel code (but not by the user applications). 11 10 /////////////////////////////////////////////////////////////////////////////////// … … 21 20 22 21 #define NULL (void *)0 23 24 ///////////////////////////////////////////////////////////////////////////////////25 // This structure is used to have one single lock in a cache line26 ///////////////////////////////////////////////////////////////////////////////////27 28 typedef struct giet_lock_s { unsigned int value;29 unsigned int padding[15]; } giet_lock_t;30 22 31 23 /////////////////////////////////////////////////////////////////////////////////// … … 109 101 extern void _io_extended_write( unsigned int* vaddr, 110 102 unsigned int value ); 111 112 ///////////////////////////////////////////////////////////////////////////////////113 // Locks access functions114 ///////////////////////////////////////////////////////////////////////////////////115 116 extern void _get_lock(giet_lock_t* lock);117 118 extern void _release_lock(giet_lock_t* lock);119 120 ///////////////////////////////////////////////////////////////////////////////////121 // Access functions to kernel terminal TTY0122 ///////////////////////////////////////////////////////////////////////////////////123 124 extern void _puts( char* string );125 126 extern void _putx( unsigned int val );127 128 extern void _putl( unsigned long long val );129 130 extern void _putd( unsigned int val );131 132 extern void _getc( char* byte );133 134 103 135 104 /////////////////////////////////////////////////////////////////////////////////// -
soft/giet_vm/giet_common/vmem.c
r442 r455 6 6 /////////////////////////////////////////////////////////////////////////////////// 7 7 8 #include <tty0.h> 8 9 #include <utils.h> 9 10 #include <vmem.h>
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