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[MIPS] RP: Pass number of TCs available to RP program in $2.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-07-27 19:33:18 +01:00
parent 07cc0c9e65
commit 41790e04e6
1 changed files with 73 additions and 9 deletions
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82
arch/mips/kernel/vpe.c
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@ -64,6 +64,10 @@ typedef void *vpe_handle;
/* If this is set, the section belongs in the init part of the module */
#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
/*
* The number of TCs and VPEs physically available on the core
*/
static int hw_tcs, hw_vpes;
static char module_name[] = "vpe";
static int major;
static const int minor = 1; /* fixed for now */
@ -126,6 +130,8 @@ struct vpe {
/* the list of who wants to know when something major happens */
struct list_head notify;
unsigned int ntcs;
};
struct tc {
@ -738,6 +744,7 @@ static int vpe_run(struct vpe * v)
* here... Or set $a3 to zero and define DFLT_STACK_SIZE and
* DFLT_HEAP_SIZE when you compile your program
*/
mttgpr(6, v->ntcs);
mttgpr(7, physical_memsize);
/* set up VPE1 */
@ -1333,16 +1340,60 @@ static void kspd_sp_exit( int sp_id)
}
#endif
static struct device *vpe_dev;
static ssize_t show_ntcs(struct class_device *cd, char *buf)
{
struct vpe *vpe = get_vpe(tclimit);
return sprintf(buf, "%d\n", vpe->ntcs);
}
static ssize_t store_ntcs(struct class_device *dev, const char *buf, size_t len)
{
struct vpe *vpe = get_vpe(tclimit);
unsigned long new;
char *endp;
new = simple_strtoul(buf, &endp, 0);
if (endp == buf)
goto out_einval;
if (new == 0 || new > (hw_tcs - tclimit))
goto out_einval;
vpe->ntcs = new;
return len;
out_einval:
return -EINVAL;;
}
static struct class_device_attribute vpe_class_attributes[] = {
__ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs),
{}
};
static void vpe_class_device_release(struct class_device *cd)
{
kfree(cd);
}
struct class vpe_class = {
.name = "vpe",
.owner = THIS_MODULE,
.release = vpe_class_device_release,
.class_dev_attrs = vpe_class_attributes,
};
struct class_device vpe_device;
static int __init vpe_module_init(void)
{
unsigned int mtflags, vpflags;
int hw_tcs, hw_vpes, tc, err = 0;
unsigned long flags, val;
struct vpe *v = NULL;
struct device *dev;
struct tc *t;
int tc, err;
if (!cpu_has_mipsmt) {
printk("VPE loader: not a MIPS MT capable processor\n");
@ -1371,13 +1422,22 @@ static int __init vpe_module_init(void)
return major;
}
dev = device_create(mt_class, NULL, MKDEV(major, minor),
"vpe%d", minor);
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
err = class_register(&vpe_class);
if (err) {
printk(KERN_ERR "vpe_class registration failed\n");
goto out_chrdev;
}
vpe_dev = dev;
class_device_initialize(&vpe_device);
vpe_device.class = &vpe_class,
vpe_device.parent = NULL,
strlcpy(vpe_device.class_id, "vpe1", BUS_ID_SIZE);
vpe_device.devt = MKDEV(major, minor);
err = class_device_add(&vpe_device);
if (err) {
printk(KERN_ERR "Adding vpe_device failed\n");
goto out_class;
}
local_irq_save(flags);
mtflags = dmt();
@ -1422,6 +1482,8 @@ static int __init vpe_module_init(void)
goto out_reenable;
}
v->ntcs = hw_tcs - tclimit;
/* add the tc to the list of this vpe's tc's. */
list_add(&t->tc, &v->tc);
@ -1497,6 +1559,8 @@ out_reenable:
#endif
return 0;
out_class:
class_unregister(&vpe_class);
out_chrdev:
unregister_chrdev(major, module_name);
@ -1514,7 +1578,7 @@ static void __exit vpe_module_exit(void)
}
}
device_destroy(mt_class, MKDEV(major, minor));
class_device_del(&vpe_device);
unregister_chrdev(major, module_name);
}