ppc85xx_init_raminfo.c

来自「qnx powerpc MPC8245的 BSP源文件」· C语言 代码 · 共 53 行

/*
 * $QNXLicenseC: 
 * Copyright 2007, QNX Software Systems.  
 *  
 * Licensed under the Apache License, Version 2.0 (the "License"). You  
 * may not reproduce, modify or distribute this software except in  
 * compliance with the License. You may obtain a copy of the License  
 * at: http://www.apache.org/licenses/LICENSE-2.0  
 *  
 * Unless required by applicable law or agreed to in writing, software  
 * distributed under the License is distributed on an "AS IS" basis,  
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied. 
 * 
 * This file may contain contributions from others, either as  
 * contributors under the License or as licensors under other terms.   
 * Please review this entire file for other proprietary rights or license  
 * notices, as well as the QNX Development Suite License Guide at  
 * http://licensing.qnx.com/license-guide/ for other information. 
 * $ 
 */


#include "startup.h"
#include <ppc/85xxcpu.h>

/*
 * ppc85xx_init_raminfo.c
 * Tell syspage about our RAM configuration
 */

void ppc85xx_init_raminfo(void) {
	paddr_t		start;
	paddr_t		end;
	uintptr_t	base;
	unsigned	i;
	unsigned	bounds;


	base = startup_io_map(MEG(1), immr_paddr);
	for(i = 0; i < 3; ++i) {
		if(in32(base + PPC85xx_CCSR_OFF_CSn_CONFIG(i)) & PPC85xx_CSn_CONFIG_CS_EN) {
			bounds = in32(base + PPC85xx_CCSR_OFF_CSn_BNDS(i));
			start = (bounds & PPC85xx_CSn_BNDS_SA_MASK) 
						<< (24 - PPC85xx_CSn_BNDS_SA_SHIFT);
			end = (bounds & PPC85xx_CSn_BNDS_EA_MASK) 
						<< (24 - PPC85xx_CSn_BNDS_EA_SHIFT);
			add_ram(start, end - start + MEG(16));
		}
	}
	startup_io_unmap(base);
}