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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [sh/] [arch/] [v2_0/] [include/] [hal_var_bank.h] - Rev 593
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#ifndef CYGONCE_HAL_VAR_BANK_H #define CYGONCE_HAL_VAR_BANK_H //============================================================================= // // hal_var_bank.h // // Architecture abstractions for variants with banked registers // //============================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //============================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): jskov // Contributors:jskov // Date: 2002-01-11 // Purpose: Architecture abstractions for variants with banked registers // //####DESCRIPTIONEND#### // //============================================================================= //----------------------------------------------------------------------------- // Processor saved states: typedef struct { // These are common to all saved states cyg_uint32 r[16]; // Data regs cyg_uint32 macl; // Multiply and accumulate - low cyg_uint32 mach; // Multiply and accumulate - high cyg_uint32 pr; // Procedure Reg cyg_uint32 sr; // Status Reg cyg_uint32 pc; // Program Counter // This marks the limit of state saved during a context switch and // is used to calculate necessary stack allocation for context switches. // It would probably be better to have a union instead... cyg_uint32 context_size[0]; // These are only saved on interrupts cyg_uint32 vbr; // Vector Base Register cyg_uint32 gbr; // Global Base Register // These are only saved on interrupts cyg_uint32 event; // EXCEVT or INTEVT } HAL_SavedRegisters; //----------------------------------------------------------------------------- // Context Initialization // Initialize the context of a thread. // Arguments: // _sparg_ name of variable containing current sp, will be written with new sp // _thread_ thread object address, passed as argument to entry point // _entry_ entry point address. // _id_ bit pattern used in initializing registers, for debugging. #define HAL_THREAD_INIT_CONTEXT( _sparg_, _thread_, _entry_, _id_ ) \ CYG_MACRO_START \ register HAL_SavedRegisters *_regs_; \ int _i_; \ _regs_ = (HAL_SavedRegisters *)((_sparg_) - sizeof(HAL_SavedRegisters)); \ for( _i_ = 0; _i_ < 16; _i_++ ) (_regs_)->r[_i_] = (_id_)|_i_; \ (_regs_)->r[15] = (CYG_WORD)(_regs_); /* SP = top of stack */ \ (_regs_)->r[04] = (CYG_WORD)(_thread_); /* R4 = arg1 = thread ptr */ \ (_regs_)->mach = 0; /* MACH = 0 */ \ (_regs_)->macl = 0; /* MACL = 0 */ \ (_regs_)->pr = (CYG_WORD)(_entry_); /* PR = entry point */ \ (_regs_)->sr = 0; /* SR = enable interrupts */ \ (_regs_)->pc = (CYG_WORD)(_entry_); /* set PC for thread dbg */ \ _sparg_ = (CYG_ADDRESS)_regs_; \ CYG_MACRO_END //----------------------------------------------------------------------------- // Thread register state manipulation for GDB support. // Translate a stack pointer as saved by the thread context macros above into // a pointer to a HAL_SavedRegisters structure. #define HAL_THREAD_GET_SAVED_REGISTERS( _sp_, _regs_ ) \ (_regs_) = (HAL_SavedRegisters *)(_sp_) // Copy a set of registers from a HAL_SavedRegisters structure into a // GDB ordered array. #define HAL_GET_GDB_REGISTERS( _aregval_, _regs_ ) \ CYG_MACRO_START \ CYG_ADDRWORD *_regval_ = (CYG_ADDRWORD *)(_aregval_); \ int _i_; \ \ for( _i_ = 0; _i_ < 16; _i_++ ) \ _regval_[_i_] = (_regs_)->r[_i_]; \ \ _regval_[16] = (_regs_)->pc; \ _regval_[17] = (_regs_)->pr; \ _regval_[18] = (_regs_)->gbr; \ _regval_[19] = (_regs_)->vbr; \ _regval_[20] = (_regs_)->mach; \ _regval_[21] = (_regs_)->macl; \ _regval_[22] = (_regs_)->sr; \ \ /* 23-51 not used atm. */ \ CYG_MACRO_END // Copy a GDB ordered array into a HAL_SavedRegisters structure. #define HAL_SET_GDB_REGISTERS( _regs_ , _aregval_ ) \ CYG_MACRO_START \ CYG_ADDRWORD *_regval_ = (CYG_ADDRWORD *)(_aregval_); \ int _i_; \ \ for( _i_ = 0; _i_ < 16; _i_++ ) \ (_regs_)->r[_i_] = _regval_[_i_]; \ \ (_regs_)->pc = _regval_[16]; \ (_regs_)->pr = _regval_[17]; \ (_regs_)->gbr = _regval_[18]; \ (_regs_)->vbr = _regval_[19]; \ (_regs_)->mach = _regval_[20]; \ (_regs_)->macl = _regval_[21]; \ (_regs_)->sr = _regval_[22]; \ CYG_MACRO_END //-------------------------------------------------------------------------- // CPU address space translation macros #define CYGARC_BUS_ADDRESS(x) ((CYG_ADDRWORD)(x) & 0x1fffffff) #define CYGARC_CACHED_ADDRESS(x) (CYGARC_BUS_ADDRESS(x)|0x80000000) #define CYGARC_UNCACHED_ADDRESS(x) (CYGARC_BUS_ADDRESS(x)|0xa0000000) //----------------------------------------------------------------------------- #endif // CYGONCE_HAL_VAR_BANK_H // End of hal_var_bank.h
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