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Diffstat (limited to 'libgloss/or1k/impure.c')
| -rw-r--r-- | libgloss/or1k/impure.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/libgloss/or1k/impure.c b/libgloss/or1k/impure.c deleted file mode 100644 index f4eb4ad19..000000000 --- a/libgloss/or1k/impure.c +++ /dev/null @@ -1,120 +0,0 @@ -/* impure.c. Handling of re-entrancy data structure for OpenRISC 1000. - - Copyright (C) 2014, Authors - - Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> - - * The authors hereby grant permission to use, copy, modify, distribute, - * and license this software and its documentation for any purpose, provided - * that existing copyright notices are retained in all copies and that this - * notice is included verbatim in any distributions. No written agreement, - * license, or royalty fee is required for any of the authorized uses. - * Modifications to this software may be copyrighted by their authors - * and need not follow the licensing terms described here, provided that - * the new terms are clearly indicated on the first page of each file where - * they apply. - */ - -#include <reent.h> -#include "or1k-internals.h" - -#include <string.h> - -/* As an exception handler may also use the library, it is better to use - * a different re-entrancy data structure for the exceptions. - * This data structure is configured here and as part of the exception - * handler (or1k_exception_handler) temporarily replaces the software's - * impure data pointer. - * - * During initialization, the libraries standard _impure_data and the exception - * impure data (_exception_impure_data) are initialized. Afterwards, - * the current value _current_impure_ptr is set to _impure_ptr. - * - * At runtime __getreent is called to return the current reentrancy pointer, - * which is stored in _current_impure_ptr. - * - * In the or1k_exception_handler the _current_impure_ptr is set to point to - * _exception_impure_ptr. After the exception handler returned, it is set back - * to _impure_ptr. - */ - -/* Link in the external impure_data structure */ -extern struct _reent *__ATTRIBUTE_IMPURE_PTR__ _impure_ptr; - -#ifdef __OR1K_MULTICORE__ -struct _reent **_or1k_impure_ptr; -struct _reent **_or1k_exception_impure_ptr; -struct _reent **_or1k_current_impure_ptr; -#else -struct _reent *__ATTRIBUTE_IMPURE_PTR__ _or1k_impure_ptr; - -/* Create exception impure data structure */ -static struct _reent _or1k_exception_impure_data = _REENT_INIT (_or1k_exception_impure_data); - -/* Link to the exception impure data structure */ -struct _reent *__ATTRIBUTE_IMPURE_PTR__ _or1k_exception_impure_ptr = &_or1k_exception_impure_data; - -/* Link to the currently used data structure. */ -struct _reent *__ATTRIBUTE_IMPURE_PTR__ _or1k_current_impure_ptr; -#endif - -#ifdef __OR1K_MULTICORE__ -#define OR1K_LIBC_GETREENT _or1k_current_impure_ptr[or1k_coreid()] -#else -#define OR1K_LIBC_GETREENT _or1k_current_impure_ptr -#endif - -void -_or1k_libc_impure_init (void) -{ -#ifdef __OR1K_MULTICORE__ - uint32_t c; - - _or1k_impure_ptr = _sbrk_r(0, sizeof(struct _reent*) * or1k_numcores()); - _or1k_exception_impure_ptr = _sbrk_r(0, sizeof(struct _reent*) * or1k_numcores()); - _or1k_current_impure_ptr = _sbrk_r(0, sizeof(struct _reent*) * or1k_numcores()); - - _or1k_impure_ptr[0] = _impure_ptr; - _REENT_INIT_PTR(_impure_ptr); - for (c = 1; c < or1k_numcores(); c++) { - _or1k_impure_ptr[c] = _sbrk_r(0, sizeof(struct _reent)); - _REENT_INIT_PTR(_or1k_impure_ptr[c]); - } - - for (c = 0; c < or1k_numcores(); c++) { - _or1k_exception_impure_ptr[c] = _sbrk_r(0, sizeof(struct _reent)); - _REENT_INIT_PTR(_or1k_exception_impure_ptr[c]); - } - - for (c = 0; c < or1k_numcores(); c++) { - _or1k_current_impure_ptr[c] = _or1k_impure_ptr[c]; - } -#else - // Initialize both impure data structures - _REENT_INIT_PTR (_impure_ptr); - _REENT_INIT_PTR (_or1k_exception_impure_ptr); - - // Set current to standard impure pointer - _or1k_current_impure_ptr = _impure_ptr; -#endif -} - -struct _reent* -_or1k_libc_getreent(void) { - return OR1K_LIBC_GETREENT; -} - -#ifdef __OR1K_MULTICORE__ -struct _or1k_reent (*_or1k_reent)[]; -#else -struct _or1k_reent _or1k_reent; -#endif - -void -_or1k_reent_init(void) -{ -#ifdef __OR1K_MULTICORE__ - size_t memsize = sizeof(struct _or1k_reent) * or1k_numcores(); - _or1k_reent = (struct _or1k_reent*) _sbrk_r(0, memsize); -#endif -} |