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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [powerpc/] [ppc60x/] [v2_0/] [src/] [var_misc.c] - Rev 454
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//========================================================================== // // var_misc.c // // HAL implementation miscellaneous functions // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // Copyright (C) 2002 Gary Thomas // // 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: 2000-02-04 // Purpose: HAL miscellaneous functions // Description: This file contains miscellaneous functions provided by the // HAL. // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/hal.h> #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS #include <cyg/hal/ppc_regs.h> #include <cyg/infra/cyg_type.h> #include <cyg/hal/hal_mem.h> //-------------------------------------------------------------------------- void hal_variant_init(void) { } //-------------------------------------------------------------------------- // Variant specific idle thread action. bool hal_variant_idle_thread_action( cyg_uint32 count ) { // Let architecture idle thread action run return true; } //--------------------------------------------------------------------------- // Use MMU resources to map memory regions. // Takes and returns an int used to ID the MMU resource to use. This ID // is increased as resources are used and should be used for subsequent // invocations. int cyg_hal_map_memory (int id,CYG_ADDRESS virt, CYG_ADDRESS phys, cyg_int32 size, cyg_uint8 flags) { // Use BATs to map the memory. cyg_uint32 ubat, lbat; ubat = (virt & UBAT_BEPIMASK) | UBAT_VS | UBAT_VP; lbat = (phys & LBAT_BRPNMASK) | LBAT_PP_RW; if (flags & CYGARC_MEMDESC_CI) lbat |= LBAT_I; if (flags & CYGARC_MEMDESC_GUARDED) lbat |= LBAT_G; // There are 4 BATs, size is programmable. while (id < 4 && size > 0) { cyg_uint32 blk_size = 128*1024; cyg_uint32 bl = 0; while (blk_size < 256*1024*1024 && blk_size < size) { blk_size *= 2; bl = (bl << 1) | 1; } ubat = (ubat & ~UBAT_BLMASK) | (bl << 2); switch (id) { case 0: CYGARC_MTSPR (IBAT0U, ubat); CYGARC_MTSPR (IBAT0L, lbat); CYGARC_MTSPR (DBAT0U, ubat); CYGARC_MTSPR (DBAT0L, lbat); break; case 1: CYGARC_MTSPR (IBAT1U, ubat); CYGARC_MTSPR (IBAT1L, lbat); CYGARC_MTSPR (DBAT1U, ubat); CYGARC_MTSPR (DBAT1L, lbat); break; case 2: CYGARC_MTSPR (IBAT2U, ubat); CYGARC_MTSPR (IBAT2L, lbat); CYGARC_MTSPR (DBAT2U, ubat); CYGARC_MTSPR (DBAT2L, lbat); break; case 3: CYGARC_MTSPR (IBAT3U, ubat); CYGARC_MTSPR (IBAT3L, lbat); CYGARC_MTSPR (DBAT3U, ubat); CYGARC_MTSPR (DBAT3L, lbat); break; } size -= blk_size; id++; } return id; } // Initialize MMU to a sane (NOP) state. void cyg_hal_clear_MMU (void) { cyg_uint32 ubat, lbat; // Initialize BATs with 0 -- VS&VP are unset, making all matches fail ubat = 0; lbat = 0; CYGARC_MTSPR (IBAT0U, ubat); CYGARC_MTSPR (IBAT0L, lbat); CYGARC_MTSPR (DBAT0U, ubat); CYGARC_MTSPR (DBAT0L, lbat); CYGARC_MTSPR (IBAT1U, ubat); CYGARC_MTSPR (IBAT1L, lbat); CYGARC_MTSPR (DBAT1U, ubat); CYGARC_MTSPR (DBAT1L, lbat); CYGARC_MTSPR (IBAT2U, ubat); CYGARC_MTSPR (IBAT2L, lbat); CYGARC_MTSPR (DBAT2U, ubat); CYGARC_MTSPR (DBAT2L, lbat); CYGARC_MTSPR (IBAT3U, ubat); CYGARC_MTSPR (IBAT3L, lbat); CYGARC_MTSPR (DBAT3U, ubat); CYGARC_MTSPR (DBAT3L, lbat); } //-------------------------------------------------------------------------- // End of var_misc.c
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