path: root/arch/ppc/platforms/prep_setup.c

/*
 *  Copyright (C) 1995  Linus Torvalds
 *  Adapted from 'alpha' version by Gary Thomas
 *  Modified by Cort Dougan (cort@cs.nmt.edu)
 *
 * Support for PReP (Motorola MTX/MVME)
 * by Troy Benjegerdes (hozer@drgw.net)
 */

/*
 * bootup setup stuff..
 */

#include <linux/config.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/initrd.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/timex.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/sections.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/cache.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/mc146818rtc.h>
#include <asm/mk48t59.h>
#include <asm/prep_nvram.h>
#include <asm/raven.h>
#include <asm/vga.h>
#include <asm/time.h>
#include <asm/mpc10x.h>
#include <asm/i8259.h>
#include <asm/open_pic.h>
#include <asm/pci-bridge.h>
#include <asm/todc.h>

/* prep registers for L2 */
#define CACHECRBA       0x80000823      /* Cache configuration register address */
#define L2CACHE_MASK	0x03	/* Mask for 2 L2 Cache bits */
#define L2CACHE_512KB	0x00	/* 512KB */
#define L2CACHE_256KB	0x01	/* 256KB */
#define L2CACHE_1MB	0x02	/* 1MB */
#define L2CACHE_NONE	0x03	/* NONE */
#define L2CACHE_PARITY  0x08    /* Mask for L2 Cache Parity Protected bit */

TODC_ALLOC();

unsigned char ucBoardRev;
unsigned char ucBoardRevMaj, ucBoardRevMin;

extern unsigned char prep_nvram_read_val(int addr);
extern void prep_nvram_write_val(int addr,
				 unsigned char val);
extern unsigned char rs_nvram_read_val(int addr);
extern void rs_nvram_write_val(int addr,
				 unsigned char val);
extern void ibm_prep_init(void);

extern void prep_find_bridges(void);

int _prep_type;

extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);


#define cached_21	(((char *)(ppc_cached_irq_mask))[3])
#define cached_A1	(((char *)(ppc_cached_irq_mask))[2])

#ifdef CONFIG_SOUND_CS4232
long ppc_cs4232_dma, ppc_cs4232_dma2;
#endif

extern PTE *Hash, *Hash_end;
extern unsigned long Hash_size, Hash_mask;
extern int probingmem;
extern unsigned long loops_per_jiffy;

#ifdef CONFIG_SOUND_CS4232
EXPORT_SYMBOL(ppc_cs4232_dma);
EXPORT_SYMBOL(ppc_cs4232_dma2);
#endif

/* useful ISA ports */
#define PREP_SYSCTL	0x81c
/* present in the IBM reference design; possibly identical in Mot boxes: */
#define PREP_IBM_SIMM_ID	0x803	/* SIMM size: 32 or 8 MiB */
#define PREP_IBM_SIMM_PRESENCE	0x804
#define PREP_IBM_EQUIPMENT	0x80c
#define PREP_IBM_L2INFO	0x80d
#define PREP_IBM_PM1	0x82a	/* power management register 1 */
#define PREP_IBM_PLANAR	0x852	/* planar ID - identifies the motherboard */
#define PREP_IBM_DISP	0x8c0	/* 4-digit LED display */

/* Equipment Present Register masks: */
#define PREP_IBM_EQUIPMENT_RESERVED	0x80
#define PREP_IBM_EQUIPMENT_SCSIFUSE	0x40
#define PREP_IBM_EQUIPMENT_L2_COPYBACK	0x08
#define PREP_IBM_EQUIPMENT_L2_256	0x04
#define PREP_IBM_EQUIPMENT_CPU	0x02
#define PREP_IBM_EQUIPMENT_L2	0x01

/* planar ID values: */
/* Sandalfoot/Sandalbow (6015/7020) */
#define PREP_IBM_SANDALFOOT	0xfc
/* Woodfield, Thinkpad 850/860 (6042/7249) */
#define PREP_IBM_THINKPAD	0xff /* planar ID unimplemented */
/* PowerSeries 830/850 (6050/6070) */
#define PREP_IBM_CAROLINA_IDE_0	0xf0
#define PREP_IBM_CAROLINA_IDE_1	0xf1
#define PREP_IBM_CAROLINA_IDE_2	0xf2
#define PREP_IBM_CAROLINA_IDE_3	0xf3
/* 7248-43P */
#define PREP_IBM_CAROLINA_SCSI_0	0xf4
#define PREP_IBM_CAROLINA_SCSI_1	0xf5
#define PREP_IBM_CAROLINA_SCSI_2	0xf6
#define PREP_IBM_CAROLINA_SCSI_3	0xf7 /* missing from Carolina Tech Spec */
/* Tiger1 (7043-140) */
#define PREP_IBM_TIGER1_133		0xd1
#define PREP_IBM_TIGER1_166		0xd2
#define PREP_IBM_TIGER1_180		0xd3
#define PREP_IBM_TIGER1_xxx		0xd4 /* unknown, but probably exists */
#define PREP_IBM_TIGER1_333		0xd5 /* missing from Tiger Tech Spec */

/* setup_ibm_pci:
 * 	set Motherboard_map_name, Motherboard_map, Motherboard_routes.
 * 	return 8259 edge/level masks.
 */
void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);

extern char *Motherboard_map_name; /* for use in *_cpuinfo */

/*
 * As found in the PReP reference implementation.
 * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
 */
static void __init
prep_gen_enable_l2(void)