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linux/arch/ppc/platforms/chrp_setup.c

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/*
* arch/ppc/platforms/setup.c
*
* 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/config.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/pci.h>
#include <linux/version.h>
#include <linux/adb.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/irq.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <linux/module.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/btext.h>
#include <asm/i8259.h>
#include <asm/open_pic.h>
#include <asm/xmon.h>
unsigned long chrp_get_rtc_time(void);
int chrp_set_rtc_time(unsigned long nowtime);
void chrp_calibrate_decr(void);
long chrp_time_init(void);
void chrp_find_bridges(void);
void chrp_event_scan(void);
void rtas_display_progress(char *, unsigned short);
void rtas_indicator_progress(char *, unsigned short);
void btext_progress(char *, unsigned short);
extern unsigned long pmac_find_end_of_memory(void);
extern int of_show_percpuinfo(struct seq_file *, int);
int _chrp_type;
EXPORT_SYMBOL(_chrp_type);
/*
* 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 dev_t boot_dev;
extern PTE *Hash, *Hash_end;
extern unsigned long Hash_size, Hash_mask;
extern int probingmem;
extern unsigned long loops_per_jiffy;
static int max_width;
#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"
};
int __chrp
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]);
}
return 0;
}
/*
* 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) {
unsigned int *l2cr = (unsigned int *)
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);
}
}
}
void __init chrp_setup_arch(void)
{
struct device_node *device;
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
#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();
#ifndef CONFIG_PPC64BRIDGE
/*
* Temporary fixes for PCI devices.
* -- Geert
*/
hydra_init(); /* Mac I/O */
#endif /* CONFIG_PPC64BRIDGE */
/*
* Fix the Super I/O configuration
*/
sio_init();
/* Get the event scan rate for the rtas so we know how
* often it expects a heartbeat. -- Cort
*/
if ( rtas_data ) {
struct property *p;
device = find_devices("rtas");
for ( p = device->properties;
p && strncmp(p->name, "rtas-event-scan-rate", 20);
p = p->next )
/* nothing */ ;
if ( p && *(unsigned long *)p->value ) {
ppc_md.heartbeat = chrp_event_scan;
ppc_md.heartbeat_reset = (HZ/(*(unsigned long *)p->value)*30)-1;
ppc_md.heartbeat_count = 1;
printk("RTAS Event Scan Rate: %lu (%lu jiffies)\n",
*(unsigned long *)p->value, ppc_md.heartbeat_reset );
}
}
pci_create_OF_bus_map();
}
void __chrp
chrp_event_scan(void)
{
unsigned char log[1024];
unsigned long ret = 0;
/* XXX: we should loop until the hardware says no more error logs -- Cort */
call_rtas( "event-scan", 4, 1, &ret, 0xffffffff, 0,
__pa(log), 1024 );
ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
}
void __chrp
chrp_restart(char *cmd)
{
printk("RTAS system-reboot returned %d\n",
call_rtas("system-reboot", 0, 1, NULL));
for (;;);
}
void __chrp
chrp_power_off(void)
{
/* allow power on only with power button press */
printk("RTAS power-off returned %d\n",
call_rtas("power-off", 2, 1, NULL,0xffffffff,0xffffffff));
for (;;);
}
void __chrp
chrp_halt(void)
{
chrp_power_off();
}
u_int __chrp
chrp_irq_canonicalize(u_int irq)
{
if (irq == 2)
return 9;
return irq;
}
/*
* Finds the open-pic node and sets OpenPIC_Addr based on its reg property.
* Then checks if it has an interrupt-ranges property. If it does then
* we have a distributed open-pic, so call openpic_set_sources to tell
* the openpic code where to find the interrupt source registers.
*/
static void __init chrp_find_openpic(void)
{
struct device_node *np;
int len, i;
unsigned int *iranges;
void __iomem *isu;
np = find_type_devices("open-pic");
if (np == NULL || np->n_addrs == 0)
return;
printk(KERN_INFO "OpenPIC at %x (size %x)\n",
np->addrs[0].address, np->addrs[0].size);
OpenPIC_Addr = ioremap(np->addrs[0].address, 0x40000);
if (OpenPIC_Addr == NULL) {
printk(KERN_ERR "Failed to map OpenPIC!\n");
return;
}
iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
if (iranges == NULL || len < 2 * sizeof(unsigned int))
return; /* not distributed */
/*
* The first pair of cells in interrupt-ranges refers to the
* IDU; subsequent pairs refer to the ISUs.
*/
len /= 2 * sizeof(unsigned int);
if (np->n_addrs < len) {
printk(KERN_ERR "Insufficient addresses for distributed"
" OpenPIC (%d < %d)\n", np->n_addrs, len);
return;
}
if (iranges[1] != 0) {
printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
iranges[0], iranges[0] + iranges[1] - 1);
openpic_set_sources(iranges[0], iranges[1], NULL);
}
for (i = 1; i < len; ++i) {
iranges += 2;
printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x (%x)\n",
iranges[0], iranges[0] + iranges[1] - 1,
np->addrs[i].address, np->addrs[i].size);
isu = ioremap(np->addrs[i].address, np->addrs[i].size);
if (isu != NULL)
openpic_set_sources(iranges[0], iranges[1], isu);
else
printk(KERN_ERR "Failed to map OpenPIC ISU at %x!\n",
np->addrs[i].address);
}
}
#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
void __init chrp_init_IRQ(void)
{
struct device_node *np;
int i;
unsigned long chrp_int_ack = 0;
unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
struct device_node *kbd;
#endif
for (np = find_devices("pci"); np != NULL; np = np->next) {
unsigned int *addrp = (unsigned int *)
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_ERR "Cannot find PCI interrupt acknowledge address\n");
chrp_find_openpic();
if (OpenPIC_Addr) {
prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS);
OpenPIC_InitSenses = init_senses;
OpenPIC_NumInitSenses = NR_IRQS - NUM_8259_INTERRUPTS;
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);
}
for (i = 0; i < NUM_8259_INTERRUPTS; i++)
irq_desc[i].handler = &i8259_pic;
i8259_init(chrp_int_ack);
#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)
{
#ifdef CONFIG_NVRAM
// XX replace this in a more saner way
// pmac_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");
if (ppc_md.progress)
ppc_md.progress(" Have fun! ", 0x7777);
}
void __init
chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
struct device_node *root = find_path_device ("/");
char *machine = NULL;
#ifdef CONFIG_BLK_DEV_INITRD
/* take care of initrd if we have one */
if ( r6 )
{
initrd_start = r6 + KERNELBASE;
initrd_end = r6 + r7 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
isa_io_base = CHRP_ISA_IO_BASE; /* default value */
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 {
/* Let's assume it is an IBM chrp if all else fails */
_chrp_type = _CHRP_IBM;
}
ppc_md.setup_arch = chrp_setup_arch;
ppc_md.show_percpuinfo = of_show_percpuinfo;
ppc_md.show_cpuinfo = chrp_show_cpuinfo;
ppc_md.irq_canonicalize = chrp_irq_canonicalize;
ppc_md.init_IRQ = chrp_init_IRQ;
if (_chrp_type == _CHRP_Pegasos)
ppc_md.get_irq = i8259_irq;
else
ppc_md.get_irq = openpic_get_irq;
ppc_md.init = chrp_init2;
ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
ppc_md.restart = chrp_restart;
ppc_md.power_off = chrp_power_off;
ppc_md.halt = chrp_halt;
ppc_md.time_init = chrp_time_init;
ppc_md.set_rtc_time = chrp_set_rtc_time;
ppc_md.get_rtc_time = chrp_get_rtc_time;
ppc_md.calibrate_decr = chrp_calibrate_decr;
ppc_md.find_end_of_memory = pmac_find_end_of_memory;
if (rtas_data) {
struct device_node *rtas;
unsigned int *p;
rtas = find_devices("rtas");
if (rtas != NULL) {
if (get_property(rtas, "display-character", NULL)) {
ppc_md.progress = rtas_display_progress;
p = (unsigned int *) get_property
(rtas, "ibm,display-line-length", NULL);
if (p)
max_width = *p;
} else if (get_property(rtas, "set-indicator", NULL))
ppc_md.progress = rtas_indicator_progress;
}
}
#ifdef CONFIG_BOOTX_TEXT
if (ppc_md.progress == NULL && boot_text_mapped)
ppc_md.progress = btext_progress;
#endif
#ifdef CONFIG_SMP
ppc_md.smp_ops = &chrp_smp_ops;
#endif /* CONFIG_SMP */
/*
* 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
rtas_display_progress(char *s, unsigned short hex)
{
int width;
char *os = s;
if ( call_rtas( "display-character", 1, 1, NULL, '\r' ) )
return;
width = max_width;
while ( *os )
{
if ( (*os == '\n') || (*os == '\r') )
width = max_width;
else
width--;
call_rtas( "display-character", 1, 1, NULL, *os++ );
/* if we overwrite the screen length */
if ( width == 0 )
while ( (*os != 0) && (*os != '\n') && (*os != '\r') )
os++;
}
/*while ( width-- > 0 )*/
call_rtas( "display-character", 1, 1, NULL, ' ' );
}
void __chrp
rtas_indicator_progress(char *s, unsigned short hex)
{
call_rtas("set-indicator", 3, 1, NULL, 6, 0, hex);
}
#ifdef CONFIG_BOOTX_TEXT
void
btext_progress(char *s, unsigned short hex)
{
prom_print(s);
prom_print("\n");
}
#endif /* CONFIG_BOOTX_TEXT */
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