loadmmu.c

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/*
 * loadmmu.c: Setup cpu/cache specific function ptrs at boot time.
 *
 * Copyright (C) 1996 David S. Miller ([e-mail])
 *
 * $Id: loadmmu.c,v 1.17 2000/03/13 10:33:05 raiko Exp $
 */
#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/bootinfo.h>

/* memory functions */
void (*_clear_page)(void * page);
void (*_copy_page)(void * to, void * from);

/* Cache operations. */
void (*_flush_cache_all)(void);
void (*_flush_cache_mm)(struct mm_struct *mm);
void (*_flush_cache_range)(struct mm_struct *mm, unsigned long start,
			  unsigned long end);
void (*_flush_cache_page)(struct vm_area_struct *vma, unsigned long page);
void (*_flush_cache_sigtramp)(unsigned long addr);
void (*_flush_page_to_ram)(struct page * page);

/* DMA cache operations. */
void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
void (*_dma_cache_wback)(unsigned long start, unsigned long size);
void (*_dma_cache_inv)(unsigned long start, unsigned long size);

#ifdef CONFIG_CPU_R3000
extern void ld_mmu_r2300(void);
#endif
#if defined(CONFIG_CPU_R4X00) || defined(CONFIG_CPU_R4300) || \
    defined(CONFIG_CPU_R5000) || defined(CONFIG_CPU_NEVADA)
extern void ld_mmu_r4xx0(void);
#endif
#ifdef CONFIG_CPU_R6000
extern void ld_mmu_r6000(void);
#endif
#ifdef CONFIG_CPU_R8000
extern void ld_mmu_tfp(void);
#endif
#ifdef CONFIG_CPU_R10000
extern void ld_mmu_andes(void);
#endif

void __init loadmmu(void)
{
	switch(mips_cputype) {
#ifdef CONFIG_CPU_R3000
	case CPU_R2000:
	case CPU_R3000:
	case CPU_R3000A:
	case CPU_R3081E:
		printk("Loading R[23]00 MMU routines.\n");
		ld_mmu_r2300();
		break;
#endif

#if defined(CONFIG_CPU_R4X00) || defined(CONFIG_CPU_R4300) || \
    defined(CONFIG_CPU_R5000) || defined(CONFIG_CPU_NEVADA)
	case CPU_R4000PC:
	case CPU_R4000SC:
	case CPU_R4000MC:
	case CPU_R4200:
	case CPU_R4300:
	case CPU_R4400PC:
	case CPU_R4400SC:
	case CPU_R4400MC:
	case CPU_R4600:
	case CPU_R4640:
	case CPU_R4650:
	case CPU_R4700:
	case CPU_R5000:
	case CPU_R5000A:
	case CPU_NEVADA:
		printk("Loading R4000 MMU routines.\n");
		ld_mmu_r4xx0();
		break;
#endif

#ifdef CONFIG_CPU_R10000
	case CPU_R10000:
		printk("Loading R10000 MMU routines.\n");
		ld_mmu_andes();
		break;
#endif

	default:
		/* XXX We need an generic routine in the MIPS port
		 * XXX to jabber stuff onto the screen on all machines
		 * XXX before the console is setup.  The ARCS prom
		 * XXX routines look good for this, but only the SGI
		 * XXX code has a full library for that at this time.
		 */
		panic("Yeee, unsupported mmu/cache architecture.");
	}
}