harrier_init_raminfo.c

qnx powerpc MPC8245的 BSP源文件

/*
 * $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. 
 * $ 
 */

/*
 *  harrier_init_raminfo.c
 *	Tell syspage about our RAM configuration of Harrier based systems
 */
#include "startup.h"

// Initialize RAM information on a system with a Harrier memory controller
// located at 'xcsr_base'

void
harrier_init_raminfo(paddr_t xcsr_base) {
	uint32_t		sbar_reg;
	unsigned		size;
	int				i;
	uintptr_t		harrier;

	harrier = startup_io_map(0x200, xcsr_base);
	sbar_reg = in32(harrier+0x110);

	size = 0;	

	// scan all 8 banks
	for(i = 0; i < 8; i++) {
		sbar_reg = in32(harrier + 0x110+(i<<2));
		switch((sbar_reg>>16) & 0xf){
		case 0: break; 		  				// size 0
		case 1: size+=0x2000000; break;		// size 32M
		case 2:
		case 3: size+=0x4000000; break;		// size 64M 
		case 4:
		case 5:
		case 6: size+=0x8000000; break;		// size 128M
		case 7:
		case 8:
		case 9: size+=0x10000000; break;	// size 256M
		case 10:
		case 11:
		case 12: size+=0x20000000; break;	// size 512M
		case 13:		
		case 14: size+=0x40000000; break;	// size 1024M
		case 15: size+=0x80000000; break;	// size 2048M
		}
	}
	startup_io_unmap(harrier);
	add_ram(0,size);
}