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  • /*
     * (C) Copyright 2001
     * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
     *
    
     * SPDX-License-Identifier:	GPL-2.0+
    
     */
    
    #include <common.h>
    
    #include <asm/ppc4xx.h>
    
    #include <asm/processor.h>
    
    /*
     * include common flash code (for esd boards)
     */
    #include "../common/flash.c"
    
    /*-----------------------------------------------------------------------
     * Functions
     */
    static ulong flash_get_size (vu_long * addr, flash_info_t * info);
    static void flash_get_offsets (ulong base, flash_info_t * info);
    
    /*-----------------------------------------------------------------------
     */
    
    unsigned long flash_init (void)
    {
    	unsigned long size_b0;
    	int i;
    
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    	uint pbcr;
    	unsigned long base_b0;
    
    	int size_val = 0;
    
    	/* Init: no FLASHes known */
    
    	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
    
    		flash_info[i].flash_id = FLASH_UNKNOWN;
    	}
    
    	/* Static FLASH Bank configuration here - FIXME XXX */
    
    	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
    
    	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
    		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
    			size_b0, size_b0<<20);
    	}
    
    
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    	/* Setup offsets */
    	flash_get_offsets (-size_b0, &flash_info[0]);
    
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    	/* Re-do sizing to get full correct info */
    
    	mtdcr(EBC0_CFGADDR, PB0CR);
    	pbcr = mfdcr(EBC0_CFGDATA);
    	mtdcr(EBC0_CFGADDR, PB0CR);
    
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    	base_b0 = -size_b0;
    
    	switch (size_b0) {
    	case 1 << 20:
    		size_val = 0;
    		break;
    	case 2 << 20:
    		size_val = 1;
    		break;
    	case 4 << 20:
    		size_val = 2;
    		break;
    	case 8 << 20:
    		size_val = 3;
    		break;
    	case 16 << 20:
    		size_val = 4;
    		break;
    	}
    	pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
    
    	mtdcr(EBC0_CFGDATA, pbcr);
    
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    	/* Monitor protection ON by default */
    	(void)flash_protect(FLAG_PROTECT_SET,
    
    			    -CONFIG_SYS_MONITOR_LEN,
    
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    			    0xffffffff,
    			    &flash_info[0]);
    
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    	flash_info[0].size = size_b0;
    
    
    	return (size_b0);
    }