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Commit e77227eb authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC64]: Probe virtual-devices root node on sun4v. 



This is where we learn how to get the interrupts
for things like the hypervisor console device.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d5eb4004

arch/sparc64/kernel/devices.c

+58 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/string.h>

#include <linux/spinlock.h>

#include <linux/errno.h>

#include <linux/bootmem.h>



#include <asm/page.h>

#include <asm/oplib.h>
@@ -20,6 +21,7 @@ 
#include <asm/spitfire.h>

#include <asm/timer.h>

#include <asm/cpudata.h>

#include <asm/vdev.h>



/* Used to synchronize acceses to NatSemi SUPER I/O chip configure

 * operations in asm/ns87303.h
@@ -29,6 +31,61 @@ DEFINE_SPINLOCK(ns87303_lock); 
extern void cpu_probe(void);

extern void central_probe(void);



u32 sun4v_vdev_devhandle;

int sun4v_vdev_root;

struct linux_prom_pci_intmap *sun4v_vdev_intmap;

int sun4v_vdev_num_intmap;

struct linux_prom_pci_intmap sun4v_vdev_intmask;



static void __init sun4v_virtual_device_probe(void)

{

	struct linux_prom64_registers regs;

	struct linux_prom_pci_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 = sizeof(*ip) * 64;

	sun4v_vdev_intmap = ip = alloc_bootmem_low_pages(sz);

	if (!sun4v_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();

	}



	sun4v_vdev_num_intmap = err / sizeof(*ip);



	err = prom_getproperty(node, "interrupt-map-mask",

			       (char *) &sun4v_vdev_intmask,

			       sizeof(sun4v_vdev_intmask));

	if (err == -1) {

		prom_printf("SUN4V: Fatal error, no vdev "

			    "interrupt-map-mask.\n");

		prom_halt();

	}



	printk("SUN4V: virtual-devices devhandle[%x]\n",

	       sun4v_vdev_devhandle);

}



static const char *cpu_mid_prop(void)

{

	if (tlb_type == spitfire)
@@ -177,6 +234,7 @@ void __init device_scan(void) 
	}

#endif



	sun4v_virtual_device_probe();

	central_probe();



	cpu_probe();

include/asm-sparc64/vdev.h

0 → 100644
+18 −0
Original line number Diff line number Diff line 
/* vdev.h: SUN4V virtual device interfaces and defines.

 *

 * Copyright (C) 2006 David S. Miller <davem@davemloft.net>

 */



#ifndef _SPARC64_VDEV_H

#define _SPARC64_VDEV_H



#include <linux/types.h>

#include <asm/oplib.h>



extern u32 sun4v_vdev_devhandle;

extern int sun4v_vdev_root;

extern struct linux_prom_pci_intmap *sun4v_vdev_intmap;

extern int sun4v_vdev_num_intmap;

extern struct linux_prom_pci_intmap sun4v_vdev_intmask;



#endif /* !(_SPARC64_VDEV_H) */