/* *  linux/arch/arm/mach-footbridge/mm.c * *  Copyright (C) 1998-2000 Russell King, Dave Gilbert. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * *  Extra MM routines for the EBSA285 architecture */#include <linux/config.h>#include <linux/sched.h>#include <linux/mm.h>#include <linux/init.h> #include <asm/pgtable.h>#include <asm/page.h>#include <asm/io.h>#include <asm/hardware/dec21285.h>#include <asm/mach-types.h>#include <asm/mach/map.h>/* * Common mapping for all systems.  Note that the outbound write flush is * commented out since there is a "No Fix" problem with it.  Not mapping * it means that we have extra bullet protection on our feet. */static struct map_desc fb_common_io_desc[] __initdata = { { ARMCSR_BASE,	 DC21285_ARMCSR_BASE,	    ARMCSR_SIZE,  DOMAIN_IO, 0, 1, 0, 0 }, { XBUS_BASE,    0x40000000,		    XBUS_SIZE,    DOMAIN_IO, 0, 1, 0, 0 }, LAST_DESC};/* * The mapping when the footbridge is in host mode.  We don't map any of * this when we are in add-in mode. */static struct map_desc ebsa285_host_io_desc[] __initdata = {#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST) { PCIMEM_BASE,  DC21285_PCI_MEM,	    PCIMEM_SIZE,  DOMAIN_IO, 0, 1, 0, 0 }, { PCICFG0_BASE, DC21285_PCI_TYPE_0_CONFIG, PCICFG0_SIZE, DOMAIN_IO, 0, 1, 0, 0 }, { PCICFG1_BASE, DC21285_PCI_TYPE_1_CONFIG, PCICFG1_SIZE, DOMAIN_IO, 0, 1, 0, 0 }, { PCIIACK_BASE, DC21285_PCI_IACK,	    PCIIACK_SIZE, DOMAIN_IO, 0, 1, 0, 0 }, { PCIO_BASE,    DC21285_PCI_IO,	    PCIO_SIZE,	  DOMAIN_IO, 0, 1, 0, 0 },#endif LAST_DESC};/* * The CO-ebsa285 mapping. */static struct map_desc co285_io_desc[] __initdata = {#ifdef CONFIG_ARCH_CO285 { PCIO_BASE,	 DC21285_PCI_IO,	    PCIO_SIZE,    DOMAIN_IO, 0, 1, 0, 0 }, { PCIMEM_BASE,	 DC21285_PCI_MEM,	    PCIMEM_SIZE,  DOMAIN_IO, 0, 1, 0, 0 },#endif LAST_DESC};void __init footbridge_map_io(void){	struct map_desc *desc = NULL;	/*	 * Set up the common mapping first; we need this to	 * determine whether we're in host mode or not.	 */	iotable_init(fb_common_io_desc);	/*	 * Now, work out what we've got to map in addition on this	 * platform.	 */	if (machine_is_co285())		desc = co285_io_desc;	else if (footbridge_cfn_mode())		desc = ebsa285_host_io_desc;	if (desc)		iotable_init(desc);}#ifdef CONFIG_FOOTBRIDGE_ADDIN/* * These two functions convert virtual addresses to PCI addresses and PCI * addresses to virtual addresses.  Note that it is only legal to use these * on memory obtained via get_free_page or kmalloc. */unsigned long __virt_to_bus(unsigned long res){#ifdef CONFIG_DEBUG_ERRORS	if (res < PAGE_OFFSET || res >= (unsigned long)high_memory) {		printk("__virt_to_bus: invalid virtual address 0x%08lx\n", res);		__backtrace();	}#endif	return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0);}unsigned long __bus_to_virt(unsigned long res){	res -= (*CSR_PCISDRAMBASE & 0xfffffff0);	res += PAGE_OFFSET;#ifdef CONFIG_DEBUG_ERRORS	if (res < PAGE_OFFSET || res >= (unsigned long)high_memory) {		printk("__bus_to_virt: invalid virtual address 0x%08lx\n", res);		__backtrace();	}#endif	return res;}#endif