linux/arch/sparc64/kernel/devices.c
David S. Miller ee29074d3b [SPARC64]: Fix new context version SMP handling.
Don't piggy back the SMP receive signal code to do the
context version change handling.

Instead allocate another fixed PIL number for this
asynchronous cross-call.  We can't use smp_call_function()
because this thing is invoked with interrupts disabled
and a few spinlocks held.

Also, fix smp_call_function_mask() to count "cpus" correctly.
There is no guarentee that the local cpu is in the mask
yet that is exactly what this code was assuming.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 01:14:21 -08:00

335 lines
7.5 KiB
C

/* devices.c: Initial scan of the prom device tree for important
* Sparc device nodes which we need to find.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/threads.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/bootmem.h>
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/smp.h>
#include <asm/spitfire.h>
#include <asm/timer.h>
#include <asm/cpudata.h>
#include <asm/vdev.h>
#include <asm/irq.h>
/* Used to synchronize acceses to NatSemi SUPER I/O chip configure
* operations in asm/ns87303.h
*/
DEFINE_SPINLOCK(ns87303_lock);
extern void cpu_probe(void);
extern void central_probe(void);
u32 sun4v_vdev_devhandle;
int sun4v_vdev_root;
struct vdev_intmap {
unsigned int phys;
unsigned int irq;
unsigned int cnode;
unsigned int cinterrupt;
};
struct vdev_intmask {
unsigned int phys;
unsigned int interrupt;
unsigned int __unused;
};
static struct vdev_intmap *vdev_intmap;
static int vdev_num_intmap;
static struct vdev_intmask vdev_intmask;
static void __init sun4v_virtual_device_probe(void)
{
struct linux_prom64_registers regs;
struct vdev_intmap *ip;
int node, sz, err;
if (tlb_type != hypervisor)
return;
node = prom_getchild(prom_root_node);
node = prom_searchsiblings(node, "virtual-devices");
if (!node) {
prom_printf("SUN4V: Fatal error, no virtual-devices node.\n");
prom_halt();
}
sun4v_vdev_root = node;
prom_getproperty(node, "reg", (char *)&regs, sizeof(regs));
sun4v_vdev_devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;
sz = prom_getproplen(node, "interrupt-map");
if (sz <= 0) {
prom_printf("SUN4V: Error, no vdev interrupt-map.\n");
prom_halt();
}
if ((sz % sizeof(*ip)) != 0) {
prom_printf("SUN4V: Bogus interrupt-map property size %d\n",
sz);
prom_halt();
}
vdev_intmap = ip = alloc_bootmem_low_pages(sz);
if (!vdev_intmap) {
prom_printf("SUN4V: Error, cannot allocate vdev_intmap.\n");
prom_halt();
}
err = prom_getproperty(node, "interrupt-map", (char *) ip, sz);
if (err == -1) {
prom_printf("SUN4V: Fatal error, no vdev interrupt-map.\n");
prom_halt();
}
if (err != sz) {
prom_printf("SUN4V: Inconsistent interrupt-map size, "
"proplen(%d) vs getprop(%d).\n", sz,err);
prom_halt();
}
vdev_num_intmap = err / sizeof(*ip);
err = prom_getproperty(node, "interrupt-map-mask",
(char *) &vdev_intmask,
sizeof(vdev_intmask));
if (err <= 0) {
prom_printf("SUN4V: Fatal error, no vdev "
"interrupt-map-mask.\n");
prom_halt();
}
if (err % sizeof(vdev_intmask)) {
prom_printf("SUN4V: Bogus interrupt-map-mask "
"property size %d\n", err);
prom_halt();
}
printk("SUN4V: virtual-devices devhandle[%x]\n",
sun4v_vdev_devhandle);
}
unsigned int sun4v_vdev_device_interrupt(unsigned int dev_node)
{
unsigned int irq, reg;
int err, i;
err = prom_getproperty(dev_node, "interrupts",
(char *) &irq, sizeof(irq));
if (err <= 0) {
printk("VDEV: Cannot get \"interrupts\" "
"property for OBP node %x\n", dev_node);
return 0;
}
err = prom_getproperty(dev_node, "reg",
(char *) &reg, sizeof(reg));
if (err <= 0) {
printk("VDEV: Cannot get \"reg\" "
"property for OBP node %x\n", dev_node);
return 0;
}
for (i = 0; i < vdev_num_intmap; i++) {
if (vdev_intmap[i].phys == (reg & vdev_intmask.phys) &&
vdev_intmap[i].irq == (irq & vdev_intmask.interrupt)) {
irq = vdev_intmap[i].cinterrupt;
break;
}
}
if (i == vdev_num_intmap) {
printk("VDEV: No matching interrupt map entry "
"for OBP node %x\n", dev_node);
return 0;
}
return sun4v_build_irq(sun4v_vdev_devhandle, irq, 5, 0);
}
static const char *cpu_mid_prop(void)
{
if (tlb_type == spitfire)
return "upa-portid";
return "portid";
}
static int get_cpu_mid(int prom_node)
{
if (tlb_type == hypervisor) {
struct linux_prom64_registers reg;
if (prom_getproplen(prom_node, "cpuid") == 4)
return prom_getintdefault(prom_node, "cpuid", 0);
prom_getproperty(prom_node, "reg", (char *) &reg, sizeof(reg));
return (reg.phys_addr >> 32) & 0x0fffffffUL;
} else {
const char *prop_name = cpu_mid_prop();
return prom_getintdefault(prom_node, prop_name, 0);
}
}
static int check_cpu_node(int nd, int *cur_inst,
int (*compare)(int, int, void *), void *compare_arg,
int *prom_node, int *mid)
{
char node_str[128];
prom_getstring(nd, "device_type", node_str, sizeof(node_str));
if (strcmp(node_str, "cpu"))
return -ENODEV;
if (!compare(nd, *cur_inst, compare_arg)) {
if (prom_node)
*prom_node = nd;
if (mid)
*mid = get_cpu_mid(nd);
return 0;
}
(*cur_inst)++;
return -ENODEV;
}
static int __cpu_find_by(int (*compare)(int, int, void *), void *compare_arg,
int *prom_node, int *mid)
{
int nd, cur_inst, err;
nd = prom_root_node;
cur_inst = 0;
err = check_cpu_node(nd, &cur_inst,
compare, compare_arg,
prom_node, mid);
if (err == 0)
return 0;
nd = prom_getchild(nd);
while ((nd = prom_getsibling(nd)) != 0) {
err = check_cpu_node(nd, &cur_inst,
compare, compare_arg,
prom_node, mid);
if (err == 0)
return 0;
}
return -ENODEV;
}
static int cpu_instance_compare(int nd, int instance, void *_arg)
{
int desired_instance = (int) (long) _arg;
if (instance == desired_instance)
return 0;
return -ENODEV;
}
int cpu_find_by_instance(int instance, int *prom_node, int *mid)
{
return __cpu_find_by(cpu_instance_compare, (void *)(long)instance,
prom_node, mid);
}
static int cpu_mid_compare(int nd, int instance, void *_arg)
{
int desired_mid = (int) (long) _arg;
int this_mid;
this_mid = get_cpu_mid(nd);
if (this_mid == desired_mid)
return 0;
return -ENODEV;
}
int cpu_find_by_mid(int mid, int *prom_node)
{
return __cpu_find_by(cpu_mid_compare, (void *)(long)mid,
prom_node, NULL);
}
void __init device_scan(void)
{
/* FIX ME FAST... -DaveM */
ioport_resource.end = 0xffffffffffffffffUL;
prom_printf("Booting Linux...\n");
#ifndef CONFIG_SMP
{
int err, cpu_node, def;
err = cpu_find_by_instance(0, &cpu_node, NULL);
if (err) {
prom_printf("No cpu nodes, cannot continue\n");
prom_halt();
}
cpu_data(0).clock_tick = prom_getintdefault(cpu_node,
"clock-frequency",
0);
def = ((tlb_type == hypervisor) ?
(8 * 1024) :
(16 * 1024));
cpu_data(0).dcache_size = prom_getintdefault(cpu_node,
"dcache-size",
def);
def = 32;
cpu_data(0).dcache_line_size =
prom_getintdefault(cpu_node, "dcache-line-size",
def);
def = 16 * 1024;
cpu_data(0).icache_size = prom_getintdefault(cpu_node,
"icache-size",
def);
def = 32;
cpu_data(0).icache_line_size =
prom_getintdefault(cpu_node, "icache-line-size",
def);
def = ((tlb_type == hypervisor) ?
(3 * 1024 * 1024) :
(4 * 1024 * 1024));
cpu_data(0).ecache_size = prom_getintdefault(cpu_node,
"ecache-size",
def);
def = 64;
cpu_data(0).ecache_line_size =
prom_getintdefault(cpu_node, "ecache-line-size",
def);
printk("CPU[0]: Caches "
"D[sz(%d):line_sz(%d)] "
"I[sz(%d):line_sz(%d)] "
"E[sz(%d):line_sz(%d)]\n",
cpu_data(0).dcache_size, cpu_data(0).dcache_line_size,
cpu_data(0).icache_size, cpu_data(0).icache_line_size,
cpu_data(0).ecache_size, cpu_data(0).ecache_line_size);
}
#endif
sun4v_virtual_device_probe();
central_probe();
cpu_probe();
}