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linux/arch/ppc/platforms/prep_setup.c

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/*
* 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)
{
outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
}
/* Used by Carolina and Tiger1 */
static void __init
prep_carolina_enable_l2(void)
{
outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
}
/* cpuinfo code common to all IBM PReP */
static void
prep_ibm_cpuinfo(struct seq_file *m)
{
unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
seq_printf(m, "upgrade cpu\t: ");
if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
seq_printf(m, "not ");
}
seq_printf(m, "present\n");
/* print info about the SCSI fuse */
seq_printf(m, "scsi fuse\t: ");
if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
seq_printf(m, "ok");
else
seq_printf(m, "bad");
seq_printf(m, "\n");
/* print info about SIMMs */
if (have_residual_data) {
int i;
seq_printf(m, "simms\t\t: ");
for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
if (res->Memories[i].SIMMSize != 0)
seq_printf(m, "%d:%ldMiB ", i,
(res->Memories[i].SIMMSize > 1024) ?
res->Memories[i].SIMMSize>>20 :
res->Memories[i].SIMMSize);
}
seq_printf(m, "\n");
}
}
static int
prep_gen_cpuinfo(struct seq_file *m)
{
prep_ibm_cpuinfo(m);
return 0;
}
static int
prep_sandalfoot_cpuinfo(struct seq_file *m)
{
unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
prep_ibm_cpuinfo(m);
/* report amount and type of L2 cache present */
seq_printf(m, "L2 cache\t: ");
if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
seq_printf(m, "not present");
} else {
if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
seq_printf(m, "256KiB");
else
seq_printf(m, "unknown size");
if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
seq_printf(m, ", copy-back");
else
seq_printf(m, ", write-through");
}
seq_printf(m, "\n");
return 0;
}
static int
prep_thinkpad_cpuinfo(struct seq_file *m)
{
unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
char *cpubus_speed, *pci_speed;
prep_ibm_cpuinfo(m);
/* report amount and type of L2 cache present */
seq_printf(m, "l2 cache\t: ");
if ((equip_reg & 0x1) == 0) {
switch ((equip_reg & 0xc) >> 2) {
case 0x0:
seq_printf(m, "128KiB look-aside 2-way write-through\n");
break;
case 0x1:
seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
break;
case 0x2:
seq_printf(m, "256KiB look-aside 2-way write-through\n");
break;
case 0x3:
seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
break;
}
} else {
seq_printf(m, "not present\n");
}
/* report bus speeds because we can */
if ((equip_reg & 0x80) == 0) {
switch ((equip_reg & 0x30) >> 4) {
case 0x1:
cpubus_speed = "50";
pci_speed = "25";
break;
case 0x3:
cpubus_speed = "66";
pci_speed = "33";
break;
default:
cpubus_speed = "unknown";
pci_speed = "unknown";
break;
}
} else {
switch ((equip_reg & 0x30) >> 4) {
case 0x1:
cpubus_speed = "25";
pci_speed = "25";
break;
case 0x2:
cpubus_speed = "60";
pci_speed = "30";
break;
case 0x3:
cpubus_speed = "33";
pci_speed = "33";
break;
default:
cpubus_speed = "unknown";
pci_speed = "unknown";
break;
}
}
seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
return 0;
}
static int
prep_carolina_cpuinfo(struct seq_file *m)
{
unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
prep_ibm_cpuinfo(m);
/* report amount and type of L2 cache present */
seq_printf(m, "l2 cache\t: ");
if ((equip_reg & 0x1) == 0) {
unsigned int l2_reg = inb(PREP_IBM_L2INFO);
/* L2 size */
if ((l2_reg & 0x60) == 0)
seq_printf(m, "256KiB");
else if ((l2_reg & 0x60) == 0x20)
seq_printf(m, "512KiB");
else
seq_printf(m, "unknown size");
/* L2 type */
if ((l2_reg & 0x3) == 0)
seq_printf(m, ", async");
else if ((l2_reg & 0x3) == 1)
seq_printf(m, ", sync");
else
seq_printf(m, ", unknown type");
seq_printf(m, "\n");
} else {
seq_printf(m, "not present\n");
}
return 0;
}
static int
prep_tiger1_cpuinfo(struct seq_file *m)
{
unsigned int l2_reg = inb(PREP_IBM_L2INFO);
prep_ibm_cpuinfo(m);
/* report amount and type of L2 cache present */
seq_printf(m, "l2 cache\t: ");
if ((l2_reg & 0xf) == 0xf) {
seq_printf(m, "not present\n");
} else {
if (l2_reg & 0x8)
seq_printf(m, "async, ");
else
seq_printf(m, "sync burst, ");
if (l2_reg & 0x4)
seq_printf(m, "parity, ");
else
seq_printf(m, "no parity, ");
switch (l2_reg & 0x3) {
case 0x0:
seq_printf(m, "256KiB\n");
break;
case 0x1:
seq_printf(m, "512KiB\n");
break;
case 0x2:
seq_printf(m, "1MiB\n");
break;
default:
seq_printf(m, "unknown size\n");
break;
}
}
return 0;
}
/* Used by all Motorola PReP */
static int
prep_mot_cpuinfo(struct seq_file *m)
{
unsigned int cachew = *((unsigned char *)CACHECRBA);
seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
/* report amount and type of L2 cache present */
seq_printf(m, "l2 cache\t: ");
switch (cachew & L2CACHE_MASK) {
case L2CACHE_512KB:
seq_printf(m, "512KiB");
break;
case L2CACHE_256KB:
seq_printf(m, "256KiB");
break;
case L2CACHE_1MB:
seq_printf(m, "1MiB");
break;
case L2CACHE_NONE:
seq_printf(m, "none\n");
goto no_l2;
break;
default:
seq_printf(m, "%x\n", cachew);
}
seq_printf(m, ", parity %s",
(cachew & L2CACHE_PARITY)? "enabled" : "disabled");
seq_printf(m, " SRAM:");
switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
case 1: seq_printf(m, "synchronous, parity, flow-through\n");
break;
case 2: seq_printf(m, "asynchronous, no parity\n");
break;
case 3: seq_printf(m, "asynchronous, parity\n");
break;
default:seq_printf(m, "synchronous, pipelined, no parity\n");
break;
}
no_l2:
/* print info about SIMMs */
if (have_residual_data) {
int i;
seq_printf(m, "simms\t\t: ");
for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
if (res->Memories[i].SIMMSize != 0)
seq_printf(m, "%d:%ldM ", i,
(res->Memories[i].SIMMSize > 1024) ?
res->Memories[i].SIMMSize>>20 :
res->Memories[i].SIMMSize);
}
seq_printf(m, "\n");
}
return 0;
}
static void
prep_restart(char *cmd)
{
#define PREP_SP92 0x92 /* Special Port 92 */
local_irq_disable(); /* no interrupts */
/* set exception prefix high - to the prom */
_nmask_and_or_msr(0, MSR_IP);
/* make sure bit 0 (reset) is a 0 */
outb( inb(PREP_SP92) & ~1L , PREP_SP92);
/* signal a reset to system control port A - soft reset */
outb( inb(PREP_SP92) | 1 , PREP_SP92);
while ( 1 ) ;
/* not reached */
#undef PREP_SP92
}
static void
prep_halt(void)
{
local_irq_disable(); /* no interrupts */
/* set exception prefix high - to the prom */
_nmask_and_or_msr(0, MSR_IP);
while ( 1 ) ;
/* not reached */
}
/* Carrera is the power manager in the Thinkpads. Unfortunately not much is
* known about it, so we can't power down.
*/
static void
prep_carrera_poweroff(void)
{
prep_halt();
}
/*
* On most IBM PReP's, power management is handled by a Signetics 87c750
* behind the Utah component on the ISA bus. To access the 750 you must write
* a series of nibbles to port 0x82a (decoded by the Utah). This is described
* somewhat in the IBM Carolina Technical Specification.
* -Hollis
*/
static void
utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
{
/*
* byte1: 0 0 0 1 0 d a5 a4
* byte2: 0 0 0 1 a3 a2 a1 a0
*
* d = the bit's value, enabled or disabled
* (a5 a4 a3) = the byte number, minus 20
* (a2 a1 a0) = the bit number
*
* example: set the 5th bit of byte 21 (21.5)
* a5 a4 a3 = 001 (byte 1)
* a2 a1 a0 = 101 (bit 5)
*
* byte1 = 0001 0100 (0x14)
* byte2 = 0001 1101 (0x1d)
*/
unsigned char byte1=0x10, byte2=0x10;
/* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
bytenum -= 20;
byte1 |= (!!value) << 2; /* set d */
byte1 |= (bytenum >> 1) & 0x3; /* set a5, a4 */
byte2 |= (bytenum & 0x1) << 3; /* set a3 */
byte2 |= bitnum & 0x7; /* set a2, a1, a0 */
outb(byte1, PREP_IBM_PM1); /* first nibble */
mb();
udelay(100); /* important: let controller recover */
outb(byte2, PREP_IBM_PM1); /* second nibble */
mb();
udelay(100); /* important: let controller recover */
}
static void
prep_sig750_poweroff(void)
{
/* tweak the power manager found in most IBM PRePs (except Thinkpads) */
local_irq_disable();
/* set exception prefix high - to the prom */
_nmask_and_or_msr(0, MSR_IP);
utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
while (1) ;
/* not reached */
}
static int
prep_show_percpuinfo(struct seq_file *m, int i)
{
/* PREP's without residual data will give incorrect values here */
seq_printf(m, "clock\t\t: ");
if (have_residual_data)
seq_printf(m, "%ldMHz\n",
(res->VitalProductData.ProcessorHz > 1024) ?
res->VitalProductData.ProcessorHz / 1000000 :
res->VitalProductData.ProcessorHz);
else
seq_printf(m, "???\n");
return 0;
}
#ifdef CONFIG_SOUND_CS4232
static long __init masktoint(unsigned int i)
{
int t = -1;
while (i >> ++t)
;
return (t-1);
}
/*
* ppc_cs4232_dma and ppc_cs4232_dma2 are used in include/asm/dma.h
* to distinguish sound dma-channels from others. This is because
* blocksize on 16 bit dma-channels 5,6,7 is 128k, but
* the cs4232.c uses 64k like on 8 bit dma-channels 0,1,2,3
*/
static void __init prep_init_sound(void)
{
PPC_DEVICE *audiodevice = NULL;
/*
* Get the needed resource informations from residual data.
*
*/
if (have_residual_data)
audiodevice = residual_find_device(~0, NULL,
MultimediaController, AudioController, -1, 0);
if (audiodevice != NULL) {
PnP_TAG_PACKET *pkt;
pkt = PnP_find_packet((unsigned char *)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
S5_Packet, 0);
if (pkt != NULL)
ppc_cs4232_dma = masktoint(pkt->S5_Pack.DMAMask);
pkt = PnP_find_packet((unsigned char*)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
S5_Packet, 1);
if (pkt != NULL)
ppc_cs4232_dma2 = masktoint(pkt->S5_Pack.DMAMask);
}
/*
* These are the PReP specs' defaults for the cs4231. We use these
* as fallback incase we don't have residual data.
* At least the IBM Thinkpad 850 with IDE DMA Channels at 6 and 7
* will use the other values.
*/
if (audiodevice == NULL) {
switch (_prep_type) {
case _PREP_IBM:
ppc_cs4232_dma = 1;
ppc_cs4232_dma2 = -1;
break;
default:
ppc_cs4232_dma = 6;
ppc_cs4232_dma2 = 7;
}
}
/*
* Find a way to push these informations to the cs4232 driver
* Give it out with printk, when not in cmd_line?
* Append it to cmd_line and saved_command_line?
* Format is cs4232=io,irq,dma,dma2
*/
}
#endif /* CONFIG_SOUND_CS4232 */
/*
* Fill out screen_info according to the residual data. This allows us to use
* at least vesafb.
*/
static void __init
prep_init_vesa(void)
{
#if (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
defined(CONFIG_FB_VESA))
PPC_DEVICE *vgadev = NULL;
if (have_residual_data)
vgadev = residual_find_device(~0, NULL, DisplayController,
SVGAController, -1, 0);
if (vgadev != NULL) {
PnP_TAG_PACKET *pkt;
pkt = PnP_find_large_vendor_packet(
(unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
0x04, 0); /* 0x04 = Display Tag */
if (pkt != NULL) {
unsigned char *ptr = (unsigned char *)pkt;
if (ptr[4]) {
/* graphics mode */
screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
screen_info.lfb_depth = ptr[4] * 8;
screen_info.lfb_width = swab16(*(short *)(ptr+6));
screen_info.lfb_height = swab16(*(short *)(ptr+8));
screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
screen_info.lfb_base = swab32(*(long *)(ptr+12));
screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
}
}
}
#endif
}
/*
* Set DBAT 2 to access 0x80000000 so early progress messages will work
*/
static __inline__ void
prep_set_bat(void)
{
/* wait for all outstanding memory access to complete */
mb();
/* setup DBATs */
mtspr(SPRN_DBAT2U, 0x80001ffe);
mtspr(SPRN_DBAT2L, 0x8000002a);
/* wait for updates */
mb();
}
/*
* IBM 3-digit status LED
*/
static unsigned int ibm_statusled_base;
static void
ibm_statusled_progress(char *s, unsigned short hex);
static int
ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
void * dummy3)
{
ibm_statusled_progress(NULL, 0x505); /* SOS */
return NOTIFY_DONE;
}
static struct notifier_block ibm_statusled_block = {
ibm_statusled_panic,
NULL,
INT_MAX /* try to do it first */
};
static void
ibm_statusled_progress(char *s, unsigned short hex)
{
static int notifier_installed;
/*
* Progress uses 4 digits and we have only 3. So, we map 0xffff to
* 0xfff for display switch off. Out of range values are mapped to
* 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
* Install the panic notifier when the display is first switched off.
*/
if (hex == 0xffff) {
hex = 0xfff;
if (!notifier_installed) {
++notifier_installed;
atomic_notifier_chain_register(&panic_notifier_list,
&ibm_statusled_block);
}
}
else
if (hex > 0xfff)
hex = 0xeff;
mb();
outw(hex, ibm_statusled_base);
}
static void __init
ibm_statusled_init(void)
{
/*
* The IBM 3-digit LED display is specified in the residual data
* as an operator panel device, type "System Status LED". Find
* that device and determine its address. We validate all the
* other parameters on the off-chance another, similar device
* exists.
*/
if (have_residual_data) {
PPC_DEVICE *led;
PnP_TAG_PACKET *pkt;
led = residual_find_device(~0, NULL, SystemPeripheral,
OperatorPanel, SystemStatusLED, 0);
if (!led)
return;
pkt = PnP_find_packet((unsigned char *)
&res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
if (!pkt)
return;
if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
return;
if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
*(unsigned short *)pkt->S8_Pack.RangeMax)
return;
if (pkt->S8_Pack.IOAlign != 2)
return;
if (pkt->S8_Pack.IONum != 2)
return;
ibm_statusled_base = ld_le16((unsigned short *)
(pkt->S8_Pack.RangeMin));
ppc_md.progress = ibm_statusled_progress;
}
}
static void __init
prep_setup_arch(void)
{
unsigned char reg;
int is_ide=0;
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
/* Lookup PCI host bridges */
prep_find_bridges();
/* Set up floppy in PS/2 mode */
outb(0x09, SIO_CONFIG_RA);
reg = inb(SIO_CONFIG_RD);
reg = (reg & 0x3F) | 0x40;
outb(reg, SIO_CONFIG_RD);
outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
switch ( _prep_type )
{
case _PREP_IBM:
reg = inb(PREP_IBM_PLANAR);
printk(KERN_INFO "IBM planar ID: %02x", reg);
switch (reg) {
case PREP_IBM_SANDALFOOT:
prep_gen_enable_l2();
setup_ibm_pci = prep_sandalfoot_setup_pci;
ppc_md.power_off = prep_sig750_poweroff;
ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
break;
case PREP_IBM_THINKPAD:
prep_gen_enable_l2();
setup_ibm_pci = prep_thinkpad_setup_pci;
ppc_md.power_off = prep_carrera_poweroff;
ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
break;
default:
if (have_residual_data) {
prep_gen_enable_l2();
setup_ibm_pci = prep_residual_setup_pci;
ppc_md.power_off = prep_halt;
ppc_md.show_cpuinfo = prep_gen_cpuinfo;
break;
}
else
printk(" - unknown! Assuming Carolina");
/* fall through */
case PREP_IBM_CAROLINA_IDE_0:
case PREP_IBM_CAROLINA_IDE_1:
case PREP_IBM_CAROLINA_IDE_2:
case PREP_IBM_CAROLINA_IDE_3:
is_ide = 1;
case PREP_IBM_CAROLINA_SCSI_0:
case PREP_IBM_CAROLINA_SCSI_1:
case PREP_IBM_CAROLINA_SCSI_2:
case PREP_IBM_CAROLINA_SCSI_3:
prep_carolina_enable_l2();
setup_ibm_pci = prep_carolina_setup_pci;
ppc_md.power_off = prep_sig750_poweroff;
ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
break;
case PREP_IBM_TIGER1_133:
case PREP_IBM_TIGER1_166:
case PREP_IBM_TIGER1_180:
case PREP_IBM_TIGER1_xxx:
case PREP_IBM_TIGER1_333:
prep_carolina_enable_l2();
setup_ibm_pci = prep_tiger1_setup_pci;
ppc_md.power_off = prep_sig750_poweroff;
ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
break;
}
printk("\n");
/* default root device */
if (is_ide)
ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
else
ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
break;
case _PREP_Motorola:
prep_gen_enable_l2();
ppc_md.power_off = prep_halt;
ppc_md.show_cpuinfo = prep_mot_cpuinfo;
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_SDA2;
#endif
break;
}
/* Read in NVRAM data */
init_prep_nvram();
/* if no bootargs, look in NVRAM */
if ( cmd_line[0] == '\0' ) {
char *bootargs;
bootargs = prep_nvram_get_var("bootargs");
if (bootargs != NULL) {
strcpy(cmd_line, bootargs);
/* again.. */
strcpy(saved_command_line, cmd_line);
}
}
#ifdef CONFIG_SOUND_CS4232
prep_init_sound();
#endif /* CONFIG_SOUND_CS4232 */
prep_init_vesa();
switch (_prep_type) {
case _PREP_Motorola:
raven_init();
break;
case _PREP_IBM:
ibm_prep_init();
break;
}
#ifdef CONFIG_VGA_CONSOLE
/* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
vgacon_remap_base = 0xf0000000;
conswitchp = &vga_con;
#endif
}
/*
* First, see if we can get this information from the residual data.
* This is important on some IBM PReP systems. If we cannot, we let the
* TODC code handle doing this.
*/
static void __init
prep_calibrate_decr(void)
{
if (have_residual_data) {
unsigned long freq, divisor = 4;
if ( res->VitalProductData.ProcessorBusHz ) {
freq = res->VitalProductData.ProcessorBusHz;
printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
(freq/divisor)/1000000,
(freq/divisor)%1000000);
tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
tb_ticks_per_jiffy = freq / HZ / divisor;
}
}
else
todc_calibrate_decr();
}
static void __init
prep_init_IRQ(void)
{
unsigned int pci_viddid, pci_did;
if (OpenPIC_Addr != NULL) {
openpic_init(NUM_8259_INTERRUPTS);
/* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
i8259_irq);
}
if (have_residual_data) {
i8259_init(residual_isapic_addr(), 0);
return;
}
/* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
* controller, we poll (as they have a different int-ack address). */
early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
pci_did = (pci_viddid & 0xffff0000) >> 16;
if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
&& ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
|| (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
i8259_init(0, 0);
else
/* PCI interrupt ack address given in section 6.1.8 of the
* PReP specification. */
i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR, 0);
}
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
/*
* IDE stuff.
*/
static int
prep_ide_default_irq(unsigned long base)
{
switch (base) {
case 0x1f0: return 13;
case 0x170: return 13;
case 0x1e8: return 11;
case 0x168: return 10;
case 0xfff0: return 14; /* MCP(N)750 ide0 */
case 0xffe0: return 15; /* MCP(N)750 ide1 */
default: return 0;
}
}
static unsigned long
prep_ide_default_io_base(int index)
{
switch (index) {
case 0: return 0x1f0;
case 1: return 0x170;
case 2: return 0x1e8;
case 3: return 0x168;
default:
return 0;
}
}
#endif
#ifdef CONFIG_SMP
/* PReP (MTX) support */
static int __init
smp_prep_probe(void)
{
extern int mot_multi;
if (mot_multi) {
openpic_request_IPIs();
smp_hw_index[1] = 1;
return 2;
}
return 1;
}
static void __init
smp_prep_kick_cpu(int nr)
{
*(unsigned long *)KERNELBASE = nr;
asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
printk("CPU1 released, waiting\n");
}
static void __init
smp_prep_setup_cpu(int cpu_nr)
{
if (OpenPIC_Addr)
do_openpic_setup_cpu();
}
static struct smp_ops_t prep_smp_ops = {
smp_openpic_message_pass,
smp_prep_probe,
smp_prep_kick_cpu,
smp_prep_setup_cpu,
.give_timebase = smp_generic_give_timebase,
.take_timebase = smp_generic_take_timebase,
};
#endif /* CONFIG_SMP */
/*
* Setup the bat mappings we're going to load that cover
* the io areas. RAM was mapped by mapin_ram().
* -- Cort
*/
static void __init
prep_map_io(void)
{
io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
}
static int __init
prep_request_io(void)
{
#ifdef CONFIG_NVRAM
request_region(PREP_NVRAM_AS0, 0x8, "nvram");
#endif
request_region(0x00,0x20,"dma1");
request_region(0x40,0x20,"timer");
request_region(0x80,0x10,"dma page reg");
request_region(0xc0,0x20,"dma2");
return 0;
}
device_initcall(prep_request_io);
void __init
prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
#ifdef CONFIG_PREP_RESIDUAL
/* make a copy of residual data */
if ( r3 ) {
memcpy((void *)res,(void *)(r3+KERNELBASE),
sizeof(RESIDUAL));
}
#endif
isa_io_base = PREP_ISA_IO_BASE;
isa_mem_base = PREP_ISA_MEM_BASE;
pci_dram_offset = PREP_PCI_DRAM_OFFSET;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
ppc_do_canonicalize_irqs = 1;
/* figure out what kind of prep workstation we are */
if (have_residual_data) {
if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
_prep_type = _PREP_IBM;
else
_prep_type = _PREP_Motorola;
}
else {
/* assume motorola if no residual (netboot?) */
_prep_type = _PREP_Motorola;
}
#ifdef CONFIG_PREP_RESIDUAL
/* Switch off all residual data processing if the user requests it */
if (strstr(cmd_line, "noresidual") != NULL)
res = NULL;
#endif
/* Initialise progress early to get maximum benefit */
prep_set_bat();
ibm_statusled_init();
ppc_md.setup_arch = prep_setup_arch;
ppc_md.show_percpuinfo = prep_show_percpuinfo;
ppc_md.show_cpuinfo = NULL; /* set in prep_setup_arch() */
ppc_md.init_IRQ = prep_init_IRQ;
/* this gets changed later on if we have an OpenPIC -- Cort */
ppc_md.get_irq = i8259_irq;
ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
ppc_md.restart = prep_restart;
ppc_md.power_off = NULL; /* set in prep_setup_arch() */
ppc_md.halt = prep_halt;
ppc_md.nvram_read_val = prep_nvram_read_val;
ppc_md.nvram_write_val = prep_nvram_write_val;
ppc_md.time_init = todc_time_init;
if (_prep_type == _PREP_IBM) {
ppc_md.rtc_read_val = todc_mc146818_read_val;
ppc_md.rtc_write_val = todc_mc146818_write_val;
TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
8);
} else {
TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
PREP_NVRAM_DATA, 8);
}
ppc_md.calibrate_decr = prep_calibrate_decr;
ppc_md.set_rtc_time = todc_set_rtc_time;
ppc_md.get_rtc_time = todc_get_rtc_time;
ppc_md.setup_io_mappings = prep_map_io;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
ppc_ide_md.default_irq = prep_ide_default_irq;
ppc_ide_md.default_io_base = prep_ide_default_io_base;
#endif
#ifdef CONFIG_SMP
smp_ops = &prep_smp_ops;
#endif /* CONFIG_SMP */
}
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