/*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
*/
/*
* bootup setup stuff..
*/
#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/pci.h>
#include <linux/utsrelease.h>
#include <linux/adb.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/gg2.h>
#include <asm/pci-bridge.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/irq.h>
#include <asm/hydra.h>
#include <asm/sections.h>
#include <asm/time.h>
#include <asm/i8259.h>
#include <asm/mpic.h>
#include <asm/rtas.h>
#include <asm/xmon.h>
#include "chrp.h"
void rtas_indicator_progress(char *, unsigned short);
int _chrp_type;
EXPORT_SYMBOL(_chrp_type);
static struct mpic *chrp_mpic;
/* Used for doing CHRP event-scans */
DEFINE_PER_CPU(struct timer_list, heartbeat_timer);
unsigned long event_scan_interval;
/*
* XXX this should be in xmon.h, but putting it there means xmon.h
* has to include <linux/interrupt.h> (to get irqreturn_t), which
* causes all sorts of problems. -- paulus
*/
extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);
extern unsigned long loops_per_jiffy;
/* To be replaced by RTAS when available */
static unsigned int *briq_SPOR;
#ifdef CONFIG_SMP
extern struct smp_ops_t chrp_smp_ops;
#endif
static const char *gg2_memtypes[4] = {
"FPM", "SDRAM", "EDO", "BEDO"
};
static const char *gg2_cachesizes[4] = {
"256 KB", "512 KB", "1 MB", "Reserved"
};
static const char *gg2_cachetypes[4] = {
"Asynchronous", "Reserved", "Flow-Through Synchronous",
"Pipelined Synchronous"
};
static const char *gg2_cachemodes[4] = {
"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
};
static const char *chrp_names[] = {
"Unknown",
"","","",
"Motorola",
"IBM or Longtrail",
"Genesi Pegasos",
"Total Impact Briq"
};
void chrp_show_cpuinfo(struct seq_file *m)
{
int i, sdramen;
unsigned int t;
struct device_node *root;
const char *model = "";
root = find_path_device("/");
if (root)
model = get_property(root, "model", NULL);
seq_printf(m, "machine\t\t: CHRP %s\n", model);
/* longtrail (goldengate) stuff */
if (!strncmp(model, "IBM,LongTrail", 13)) {
/* VLSI VAS96011/12 `Golden Gate 2' */
/* Memory banks */
sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
>>31) & 1;
for (i = 0; i < (sdramen ? 4 : 6); i++) {
t = in_le32(gg2_pci_config_base+
GG2_PCI_DRAM_BANK0+
i*4);
if (!(t & 1))
continue;
switch ((t>>8) & 0x1f) {
case 0x1f:
model = "4 MB";
break;
case 0x1e:
model = "8 MB";
break;
case 0x1c:
model = "16 MB";
break;
case 0x18:
model = "32 MB";
break;
case 0x10:
model = "64 MB";
break;
case 0x00:
model = "128 MB";
break;
default:
model = "Reserved";
break;
}
seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
}
/* L2 cache */
t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
seq_printf(m, "board l2\t: %s %s (%s)\n",
gg2_cachesizes[(t>>7) & 3],
gg2_cachetypes[(t>>2) & 3],
gg2_cachemodes[t & 3]);
}
}
/*
* Fixes for the National Semiconductor PC78308VUL SuperI/O
*
* Some versions of Open Firmware incorrectly initialize the IRQ settings
* for keyboard and mouse
*/
static inline void __init sio_write(u8 val, u8 index)
{
outb(index, 0x15c);
outb(val, 0x15d);
}
static inline u8 __init sio_read(u8 index)
{
outb(index, 0x15c);
return inb(0x15d);
}
static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
u8 type)
{
u8 level0, type0, active;
/* select logical device */
sio_write(device, 0x07);
active = sio_read(0x30);
level0 = sio_read(0x70);
type0 = sio_read(0x71);
if (level0 != level || type0 != type || !active) {
printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
"remapping to level %d, type %d, active\n",
name, level0, type0, !active ? "in" : "", level, type);
sio_write(0x01, 0x30);
sio_write(level, 0x70);
sio_write(type, 0x71);
}
}
static void __init sio_init(void)
{
struct device_node *root;
if ((root = find_path_device("/")) &&
!strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
/* logical device 0 (KBC/Keyboard) */
sio_fixup_irq("keyboard", 0, 1, 2);
/* select logical device 1 (KBC/Mouse) */
sio_fixup_irq("mouse", 1, 12, 2);
}
}
static void __init pegasos_set_l2cr(void)
{
struct device_node *np;
/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
if (_chrp_type != _CHRP_Pegasos)
return;
/* Enable L2 cache if needed */
np = find_type_devices("cpu");
if (np != NULL) {
const unsigned int *l2cr = get_property(np, "l2cr", NULL);
if (l2cr == NULL) {
printk ("Pegasos l2cr : no cpu l2cr property found\n");
return;
}
if (!((*l2cr) & 0x80000000)) {
printk ("Pegasos l2cr : L2 cache was not active, "
"activating\n");
_set_L2CR(0);
_set_L2CR((*l2cr) | 0x80000000);
}
}
}
static void briq_restart(char *cmd)
{
local_irq_disable();
if (briq_SPOR)
out_be32(briq_SPOR, 0);
for(;;);
}
void __init chrp_setup_arch(void)
{
struct device_node *root = find_path_device ("/");
const char *machine = NULL;
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
if (root)
machine = get_property(root, "model", NULL);
if (machine && strncmp(machine, "Pegasos", 7) == 0) {
_chrp_type = _CHRP_Pegasos;
} else if (machine && strncmp(machine, "IBM", 3) == 0) {
_chrp_type = _CHRP_IBM;
} else if (machine && strncmp(machine, "MOT", 3) == 0) {
_chrp_type = _CHRP_Motorola;
} else if (machine && strncmp(machine, "TotalImpact,BRIQ-1", 18) == 0) {
_chrp_type = _CHRP_briq;
/* Map the SPOR register on briq and change the restart hook */
briq_SPOR = (unsigned int *)ioremap(0xff0000e8, 4);
ppc_md.restart = briq_restart;
} else {
/* Let's assume it is an IBM chrp if all else fails */
_chrp_type = _CHRP_IBM;
}
printk("chrp type = %x [%s]\n", _chrp_type, chrp_names[_chrp_type]);
rtas_initialize();
if (rtas_token("display-character") >= 0)
ppc_md.progress = rtas_progress;
/* use RTAS time-of-day routines if available */
if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
ppc_md.get_boot_time = rtas_get_boot_time;
ppc_md.get_rtc_time = rtas_get_rtc_time;
ppc_md.set_rtc_time = rtas_set_rtc_time;
}
#ifdef CONFIG_BLK_DEV_INITRD
/* this is fine for chrp */
initrd_below_start_ok = 1;
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
/* On pegasos, enable the L2 cache if not already done by OF */
pegasos_set_l2cr();
/* Lookup PCI host bridges */
chrp_find_bridges();
/*
* Temporary fixes for PCI devices.
* -- Geert
*/
hydra_init(); /* Mac I/O */
/*
* Fix the Super I/O configuration
*/
sio_init();
pci_create_OF_bus_map();
/*
* Print the banner, then scroll down so boot progress
* can be printed. -- Cort
*/
if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
}
void
chrp_event_scan(unsigned long unused)
{
unsigned char log[1024];
int ret = 0;
/* XXX: we should loop until the hardware says no more error logs -- Cort */
rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
__pa(log), 1024);
mod_timer(&__get_cpu_var(heartbeat_timer),
jiffies + event_scan_interval);
}
static void chrp_8259_cascade(unsigned int irq, struct irq_desc *desc,
struct pt_regs *regs)
{
unsigned int cascade_irq = i8259_irq(regs);
if (cascade_irq != NO_IRQ)
generic_handle_irq(cascade_irq);
desc->chip->eoi(irq);
}
/*
* Finds the open-pic node and sets up the mpic driver.
*/
static void __init chrp_find_openpic(void)
{
struct device_node *np, *root;
int len, i, j;
int isu_size, idu_size;
const unsigned int *iranges, *opprop = NULL;
int oplen = 0;
unsigned long opaddr;
int na = 1;
np = of_find_node_by_type(NULL, "open-pic");
if (np == NULL)
return;
root = of_find_node_by_path("/");
if (root) {
opprop = get_property(root, "platform-open-pic", &oplen);
na = prom_n_addr_cells(root);
}
if (opprop && oplen >= na * sizeof(unsigned int)) {
opaddr = opprop[na-1]; /* assume 32-bit */
oplen /= na * sizeof(unsigned int);
} else {
struct resource r;
if (of_address_to_resource(np, 0, &r)) {
goto bail;
}
opaddr = r.start;
oplen = 0;
}
printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
iranges = get_property(np, "interrupt-ranges", &len);
if (iranges == NULL)
len = 0; /* non-distributed mpic */
else
len /= 2 * sizeof(unsigned int);
/*
* The first pair of cells in interrupt-ranges refers to the
* IDU; subsequent pairs refer to the ISUs.
*/
if (oplen < len) {
printk(KERN_ERR "Insufficient addresses for distributed"
" OpenPIC (%d < %d)\n", oplen, len);
len = oplen;
}
isu_size = 0;
idu_size = 0;
if (len > 0 && iranges[1] != 0) {
printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
iranges[0], iranges[0] + iranges[1] - 1);
idu_size = iranges[1];
}
if (len > 1)
isu_size = iranges[3];
chrp_mpic = mpic_alloc(np, opaddr, MPIC_PRIMARY,
isu_size, 0, " MPIC ");
if (chrp_mpic == NULL) {
printk(KERN_ERR "Failed to allocate MPIC structure\n");
goto bail;
}
j = na - 1;
for (i = 1; i < len; ++i) {
iranges += 2;
j += na;
printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
iranges[0], iranges[0] + iranges[1] - 1,
opprop[j]);
mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
}
mpic_init(chrp_mpic);
ppc_md.get_irq = mpic_get_irq;
bail:
of_node_put(root);
of_node_put(np);
}
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
static struct irqaction xmon_irqaction = {
.handler = xmon_irq,
.mask = CPU_MASK_NONE,
.name = "XMON break",
};
#endif
static void __init chrp_find_8259(void)
{
struct device_node *np, *pic = NULL;
unsigned long chrp_int_ack = 0;
unsigned int cascade_irq;
/* Look for cascade */
for_each_node_by_type(np, "interrupt-controller")
if (device_is_compatible(np, "chrp,iic")) {
pic = np;
break;
}
/* Ok, 8259 wasn't found. We need to handle the case where
* we have a pegasos that claims to be chrp but doesn't have
* a proper interrupt tree
*/
if (pic == NULL && chrp_mpic != NULL) {
printk(KERN_ERR "i8259: Not found in device-tree"
" assuming no legacy interrupts\n");
return;
}
/* Look for intack. In a perfect world, we would look for it on
* the ISA bus that holds the 8259 but heh... Works that way. If
* we ever see a problem, we can try to re-use the pSeries code here.
* Also, Pegasos-type platforms don't have a proper node to start
* from anyway
*/
for (np = find_devices("pci"); np != NULL; np = np->next) {
const unsigned int *addrp = get_property(np,
"8259-interrupt-acknowledge", NULL);
if (addrp == NULL)
continue;
chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
break;
}
if (np == NULL)
printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
" address, polling\n");
i8259_init(pic, chrp_int_ack);
if (ppc_md.get_irq == NULL)
ppc_md.get_irq = i8259_irq;
if (chrp_mpic != NULL) {
cascade_irq = irq_of_parse_and_map(pic, 0);
if (cascade_irq == NO_IRQ)
printk(KERN_ERR "i8259: failed to map cascade irq\n");
else
set_irq_chained_handler(cascade_irq,
chrp_8259_cascade);
}
}
void __init chrp_init_IRQ(void)
{
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
struct device_node *kbd;
#endif
chrp_find_openpic();
chrp_find_8259();
#ifdef CONFIG_SMP
/* Pegasos has no MPIC, those ops would make it crash. It might be an
* option to move setting them to after we probe the PIC though
*/
if (chrp_mpic != NULL)
smp_ops = &chrp_smp_ops;
#endif /* CONFIG_SMP */
if (_chrp_type == _CHRP_Pegasos)
ppc_md.get_irq = i8259_irq;
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
/* see if there is a keyboard in the device tree
with a parent of type "adb" */
for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
if (kbd->parent && kbd->parent->type
&& strcmp(kbd->parent->type, "adb") == 0)
break;
if (kbd)
setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
#endif
}
void __init
chrp_init2(void)
{
struct device_node *device;
const unsigned int *p = NULL;
#ifdef CONFIG_NVRAM
chrp_nvram_init();
#endif
request_region(0x20,0x20,"pic1");
request_region(0xa0,0x20,"pic2");
request_region(0x00,0x20,"dma1");
request_region(0x40,0x20,"timer");
request_region(0x80,0x10,"dma page reg");
request_region(0xc0,0x20,"dma2");
/* Get the event scan rate for the rtas so we know how
* often it expects a heartbeat. -- Cort
*/
device = find_devices("rtas");
if (device)
p = get_property(device, "rtas-event-scan-rate", NULL);
if (p && *p) {
/*
* Arrange to call chrp_event_scan at least *p times
* per minute. We use 59 rather than 60 here so that
* the rate will be slightly higher than the minimum.
* This all assumes we don't do hotplug CPU on any
* machine that needs the event scans done.
*/
unsigned long interval, offset;
int cpu, ncpus;
struct timer_list *timer;
interval = HZ * 59 / *p;
offset = HZ;
ncpus = num_online_cpus();
event_scan_interval = ncpus * interval;
for (cpu = 0; cpu < ncpus; ++cpu) {
timer = &per_cpu(heartbeat_timer, cpu);
setup_timer(timer, chrp_event_scan, 0);
timer->expires = jiffies + offset;
add_timer_on(timer, cpu);
offset += interval;
}
printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
*p, interval);
}
if (ppc_md.progress)
ppc_md.progress(" Have fun! ", 0x7777);
}
static int __init chrp_probe(void)
{
char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
"device_type", NULL);
if (dtype == NULL)
return 0;
if (strcmp(dtype, "chrp"))
return 0;
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
isa_io_base = CHRP_ISA_IO_BASE; /* default value */
return 1;
}
define_machine(chrp) {
.name = "CHRP",
.probe = chrp_probe,
.setup_arch = chrp_setup_arch,
.init = chrp_init2,
.show_cpuinfo = chrp_show_cpuinfo,
.init_IRQ = chrp_init_IRQ,
.pcibios_fixup = chrp_pcibios_fixup,
.restart = rtas_restart,
.power_off = rtas_power_off,
.halt = rtas_halt,
.time_init = chrp_time_init,
.set_rtc_time = chrp_set_rtc_time,
.get_rtc_time = chrp_get_rtc_time,
.calibrate_decr = generic_calibrate_decr,
.phys_mem_access_prot = pci_phys_mem_access_prot,
};
