Mercurial > ecos
diff packages/hal/mips/arch/current/include/hal_cache.h @ 0:3111d98ba7b3 ecos-v1_1-release
Initial commit of eCos version 1.1
| author | jlarmour |
|---|---|
| date | Tue, 11 May 1999 11:16:07 +0000 |
| parents | |
| children | 443894e2e912 |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/packages/hal/mips/arch/current/include/hal_cache.h @@ -0,0 +1,402 @@ +#ifndef CYGONCE_HAL_CACHE_H +#define CYGONCE_HAL_CACHE_H + +//============================================================================= +// +// hal_cache.h +// +// HAL cache control API +// +//============================================================================= +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Cygnus eCos Public License +// Version 1.0 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://sourceware.cygnus.com/ecos +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Cygnus Operating System, released +// September 30, 1998. +// +// The Initial Developer of the Original Code is Cygnus. Portions created +// by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//============================================================================= +//#####DESCRIPTIONBEGIN#### +// +// Author(s): nickg +// Contributors: nickg +// Date: 1998-02-17 +// Purpose: Cache control API +// Description: The macros defined here provide the HAL APIs for handling +// cache control operations. +// Usage: +// #include <cyg/hal/hal_cache.h> +// ... +// +// +//####DESCRIPTIONEND#### +// +//============================================================================= + +#include <cyg/infra/cyg_type.h> + +//============================================================================= +// MIPS simulator + +#ifdef CYG_HAL_MIPS_SIM + +//----------------------------------------------------------------------------- +// Cache dimensions + +// Data cache +#define HAL_DCACHE_SIZE 4096 // Size of data cache in bytes +#define HAL_DCACHE_LINE_SIZE 16 // Size of a data cache line +#define HAL_DCACHE_WAYS 2 // Associativity of the cache + +// Instruction cache +#define HAL_ICACHE_SIZE 4096 // Size of cache in bytes +#define HAL_ICACHE_LINE_SIZE 16 // Size of a cache line +#define HAL_ICACHE_WAYS 2 // Associativity of the cache + +#define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS)) +#define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS)) + +//----------------------------------------------------------------------------- +// Global control of data cache + +// Enable the data cache +#define HAL_DCACHE_ENABLE() + +// Disable the data cache +#define HAL_DCACHE_DISABLE() + +// Invalidate the entire cache +#define HAL_DCACHE_INVALIDATE_ALL() + +// Synchronize the contents of the cache with memory. +#define HAL_DCACHE_SYNC() + +// Set the data cache refill burst size +//#define HAL_DCACHE_BURST_SIZE(_size_) + +// Set the data cache write mode +//#define HAL_DCACHE_WRITE_MODE( _mode_ ) + +//#define HAL_DCACHE_WRITETHRU_MODE 0 +//#define HAL_DCACHE_WRITEBACK_MODE 1 + +// Load the contents of the given address range into the data cache +// and then lock the cache so that it stays there. +//#define HAL_DCACHE_LOCK(_base_, _size_) + +// Undo a previous lock operation +//#define HAL_DCACHE_UNLOCK(_base_, _size_) + +//----------------------------------------------------------------------------- +// Data cache line control + +// Allocate cache lines for the given address range without reading its +// contents from memory. +//#define HAL_DCACHE_ALLOCATE( _base_ , _size_ ) + +// Write dirty cache lines to memory and invalidate the cache entries +// for the given address range. +//#define HAL_DCACHE_FLUSH( _base_ , _size_ ) + +// Invalidate cache lines in the given range without writing to memory. +//#define HAL_DCACHE_INVALIDATE( _base_ , _size_ ) + +// Write dirty cache lines to memory for the given address range. +//#define HAL_DCACHE_STORE( _base_ , _size_ ) + +// Preread the given range into the cache with the intention of reading +// from it later. +//#define HAL_DCACHE_READ_HINT( _base_ , _size_ ) + +// Preread the given range into the cache with the intention of writing +// to it later. +//#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ ) + +// Allocate and zero the cache lines associated with the given range. +//#define HAL_DCACHE_ZERO( _base_ , _size_ ) + +//----------------------------------------------------------------------------- +// Global control of Instruction cache + +// Enable the instruction cache +#define HAL_ICACHE_ENABLE() + +// Disable the instruction cache +#define HAL_ICACHE_DISABLE() + +// Invalidate the entire cache +#define HAL_ICACHE_INVALIDATE_ALL() + +// Synchronize the contents of the cache with memory. +#define HAL_ICACHE_SYNC() + +// Set the instruction cache refill burst size +//#define HAL_ICACHE_BURST_SIZE(_size_) + +// Load the contents of the given address range into the instruction cache +// and then lock the cache so that it stays there. +//#define HAL_ICACHE_LOCK(_base_, _size_) + +// Undo a previous lock operation +//#define HAL_ICACHE_UNLOCK(_base_, _size_) + +//----------------------------------------------------------------------------- +// Instruction cache line control + +// Invalidate cache lines in the given range without writing to memory. +//#define HAL_ICACHE_INVALIDATE( _base_ , _size_ ) + +#endif + + +//============================================================================= +// Toshiba TX3904 + +#ifdef CYG_HAL_MIPS_TX3904 + +//----------------------------------------------------------------------------- +// Cache dimensions + +// Data cache +#define HAL_DCACHE_SIZE 1024 // Size of data cache in bytes +#define HAL_DCACHE_LINE_SIZE 4 // Size of a data cache line +#define HAL_DCACHE_WAYS 2 // Associativity of the cache + +// Instruction cache +#define HAL_ICACHE_SIZE 4096 // Size of cache in bytes +#define HAL_ICACHE_LINE_SIZE 16 // Size of a cache line +#define HAL_ICACHE_WAYS 1 // Associativity of the cache + +#define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS)) +#define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS)) + +//----------------------------------------------------------------------------- +// Global control of data cache + +// Enable the data cache +#define HAL_DCACHE_ENABLE() \ +{ \ + asm volatile ("mfc0 $2,$3;" \ + "ori $2,$2,0x0010;" \ + "mtc0 $2,$3;" \ + : \ + : \ + : "$2" \ + ); \ + \ +} + +// Disable the data cache +#define HAL_DCACHE_DISABLE() \ +{ \ + asm volatile ("mfc0 $2,$3;" \ + "la $3,0xFFFFFFEF;" \ + "and $2,$2,$3;" \ + "mtc0 $2,$3;" \ + : \ + : \ + : "$2", "$3" \ + ); \ + \ +} + +// Invalidate the entire cache +// We do this by reading a word from each line to invalidate the current +// cache contents. +#define HAL_DCACHE_INVALIDATE_ALL() \ +{ \ + extern char __ram_data_start; \ + CYG_WORD *addr = (CYG_WORD *)&__ram_data_start; \ + CYG_WORD sum = 0; \ + int i; \ + for( i = 0; i < HAL_DCACHE_SIZE; i += HAL_DCACHE_LINE_SIZE ) \ + { \ + sum += addr[i]; \ + } \ +} + +// Synchronize the contents of the cache with memory. +#define HAL_DCACHE_SYNC() HAL_DCACHE_INVALIDATE_ALL() + +// Set the data cache refill burst size +//#define HAL_DCACHE_BURST_SIZE(_size_) + +// Set the data cache write mode +//#define HAL_DCACHE_WRITE_MODE( _mode_ ) + +//#define HAL_DCACHE_WRITETHRU_MODE 0 +//#define HAL_DCACHE_WRITEBACK_MODE 1 + +// Load the contents of the given address range into the data cache +// and then lock the cache so that it stays there. +#define HAL_DCACHE_LOCK(_base_, _size_) \ +{ \ + asm volatile ("mfc0 $2,$7;" \ + "ori $2,$2,0x0100;" \ + "mtc0 $2,$7;" \ + : \ + : \ + : "$2" \ + ); \ +} + +// Undo a previous lock operation +#define HAL_DCACHE_UNLOCK(_base_, _size_) \ +{ \ + asm volatile ("mfc0 $2,$7;" \ + "la $3,0xFFFFFEFF;" \ + "and $2,$2,$3;" \ + "mtc0 $2,$7;" \ + : \ + : \ + : "$2", "$3" \ + ); \ +} + +//----------------------------------------------------------------------------- +// Data cache line control + +// Allocate cache lines for the given address range without reading its +// contents from memory. +//#define HAL_DCACHE_ALLOCATE( _base_ , _size_ ) + +// Write dirty cache lines to memory and invalidate the cache entries +// for the given address range. +//#define HAL_DCACHE_FLUSH( _base_ , _size_ ) + +// Invalidate cache lines in the given range without writing to memory. +#define HAL_DCACHE_INVALIDATE( _base_ , _asize_ ) \ +{ \ + register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ + register CYG_WORD _size_ = (_asize_); \ + HAL_DCACHE_DISABLE(); \ + for( ; _addr_ <= _addr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ + { \ + asm volatile ("cache 17,0(%0)" : : "r"(addr) ); \ + } \ + HAL_DCACHE_ENABLE(); \ +} + +// Write dirty cache lines to memory for the given address range. +//#define HAL_DCACHE_STORE( _base_ , _size_ ) + +// Preread the given range into the cache with the intention of reading +// from it later. +//#define HAL_DCACHE_READ_HINT( _base_ , _size_ ) + +// Preread the given range into the cache with the intention of writing +// to it later. +//#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ ) + +// Allocate and zero the cache lines associated with the given range. +//#define HAL_DCACHE_ZERO( _base_ , _size_ ) + +//----------------------------------------------------------------------------- +// Global control of Instruction cache + +// Enable the instruction cache +#define HAL_ICACHE_ENABLE() \ +{ \ + asm volatile ("mfc0 $2,$3;" \ + "ori $2,$2,0x0020;" \ + "mtc0 $2,$3;" \ + : \ + : \ + : "$2" \ + ); \ + \ +} + +// Disable the instruction cache +#define HAL_ICACHE_DISABLE() \ +{ \ + asm volatile ("mfc0 $2,$3;" \ + "la $3,0xFFFFFFDF;" \ + "and $2,$2,$3;" \ + "mtc0 $2,$3;" \ + : \ + : \ + : "$2", "$3" \ + ); \ + \ +} + +// Invalidate the entire cache +#define HAL_ICACHE_INVALIDATE_ALL() \ +{ \ + register CYG_ADDRESS addr; \ + HAL_ICACHE_DISABLE(); \ + for( addr = 0; addr < HAL_ICACHE_SIZE; addr += HAL_ICACHE_LINE_SIZE ) \ + { \ + asm volatile ("cache 0,0(%0)" : : "r"(addr) ); \ + } \ + HAL_ICACHE_ENABLE(); \ +} + +// Synchronize the contents of the cache with memory. +#define HAL_ICACHE_SYNC() HAL_ICACHE_INVALIDATE_ALL() + +// Set the instruction cache refill burst size +//#define HAL_ICACHE_BURST_SIZE(_size_) + +// Load the contents of the given address range into the instruction cache +// and then lock the cache so that it stays there. +#define HAL_ICACHE_LOCK(_base_, _size_) \ +{ \ + asm volatile ("mfc0 $2,$7;" \ + "ori $2,$2,0x0200;" \ + "mtc0 $2,$7;" \ + : \ + : \ + : "$2" \ + ); \ +} + +// Undo a previous lock operation +#define HAL_ICACHE_UNLOCK(_base_, _size_) \ +{ \ + asm volatile ("mfc0 $2,$7;" \ + "la $3,0xFFFFFDFF;" \ + "and $2,$2,$3;" \ + "mtc0 $2,$7;" \ + : \ + : \ + : "$2", "$3" \ + ); \ +} + +//----------------------------------------------------------------------------- +// Instruction cache line control + +// Invalidate cache lines in the given range without writing to memory. +#define HAL_ICACHE_INVALIDATE( _base_ , _asize_ ) \ +{ \ + register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ + register CYG_WORD _size_ = (_asize_); \ + HAL_ICACHE_DISABLE(); \ + for( ; _addr_ <= _addr_+_size_; _addr_ += HAL_ICACHE_LINE_SIZE ) \ + { \ + asm volatile ("cache 0,0(%0)" : : "r"(addr) ); \ + } \ + HAL_ICACHE_ENABLE(); \ +} + +#endif + +//----------------------------------------------------------------------------- +#endif // ifndef CYGONCE_HAL_CACHE_H +// End of hal_cache.h