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|
/*
* misc.c: Miscellaneous prom functions that don't belong
* anywhere else.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/ldc.h>
static int prom_service_exists(const char *service_name)
{
unsigned long args[5];
args[0] = (unsigned long) "test";
args[1] = 1;
args[2] = 1;
args[3] = (unsigned long) service_name;
args[4] = (unsigned long) -1;
p1275_cmd_direct(args);
if (args[4])
return 0;
return 1;
}
void prom_sun4v_guest_soft_state(void)
{
const char *svc = "SUNW,soft-state-supported";
unsigned long args[3];
if (!prom_service_exists(svc))
return;
args[0] = (unsigned long) svc;
args[1] = 0;
args[2] = 0;
p1275_cmd_direct(args);
}
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
unsigned long args[4];
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_reboot(bcommand);
#endif
args[0] = (unsigned long) "boot";
args[1] = 1;
args[2] = 0;
args[3] = (unsigned long) bcommand;
p1275_cmd_direct(args);
}
/* Forth evaluate the expression contained in 'fstring'. */
void prom_feval(const char *fstring)
{
unsigned long args[5];
if (!fstring || fstring[0] == 0)
return;
args[0] = (unsigned long) "interpret";
args[1] = 1;
args[2] = 1;
args[3] = (unsigned long) fstring;
args[4] = (unsigned long) -1;
p1275_cmd_direct(args);
}
EXPORT_SYMBOL(prom_feval);
#ifdef CONFIG_SMP
extern void smp_capture(void);
extern void smp_release(void);
#endif
/* Drop into the prom, with the chance to continue with the 'go'
* prom command.
*/
void prom_cmdline(void)
{
unsigned long args[3];
unsigned long flags;
local_irq_save(flags);
#ifdef CONFIG_SMP
smp_capture();
#endif
args[0] = (unsigned long) "enter";
args[1] = 0;
args[2] = 0;
p1275_cmd_direct(args);
#ifdef CONFIG_SMP
smp_release();
#endif
local_irq_restore(flags);
}
/* Drop into the prom, but completely terminate the program.
* No chance of continuing.
*/
void notrace prom_halt(void)
{
unsigned long args[3];
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_power_off();
#endif
again:
args[0] = (unsigned long) "exit";
args[1] = 0;
args[2] = 0;
p1275_cmd_direct(args);
goto again; /* PROM is out to get me -DaveM */
}
void prom_halt_power_off(void)
{
unsigned long args[3];
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_power_off();
#endif
args[0] = (unsigned long) "SUNW,power-off";
args[1] = 0;
args[2] = 0;
p1275_cmd_direct(args);
/* if nothing else helps, we just halt */
prom_halt();
}
/* Set prom sync handler to call function 'funcp'. */
void prom_setcallback(callback_func_t funcp)
{
unsigned long args[5];
if (!funcp)
return;
args[0] = (unsigned long) "set-callback";
args[1] = 1;
args[2] = 1;
args[3] = (unsigned long) funcp;
args[4] = (unsigned long) -1;
p1275_cmd_direct(args);
}
/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
* format type. 'num_bytes' is the number of bytes that your idbuf
* has space for. Returns 0xff on error.
*/
unsigned char prom_get_idprom(char *idbuf, int num_bytes)
{
int len;
len = prom_getproplen(prom_root_node, "idprom");
if ((len >num_bytes) || (len == -1))
return 0xff;
if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
return idbuf[0];
return 0xff;
}
int prom_get_mmu_ihandle(void)
{
phandle node;
int ret;
if (prom_mmu_ihandle_cache != 0)
return prom_mmu_ihandle_cache;
node = prom_finddevice(prom_chosen_path);
ret = prom_getint(node, prom_mmu_name);
if (ret == -1 || ret == 0)
prom_mmu_ihandle_cache = -1;
else
prom_mmu_ihandle_cache = ret;
return ret;
}
static int prom_get_memory_ihandle(void)
{
static int memory_ihandle_cache;
phandle node;
int ret;
if (memory_ihandle_cache != 0)
return memory_ihandle_cache;
node = prom_finddevice("/chosen");
ret = prom_getint(node, "memory");
if (ret == -1 || ret == 0)
memory_ihandle_cache = -1;
else
memory_ihandle_cache = ret;
return ret;
}
/* Load explicit I/D TLB entries. */
static long tlb_load(const char *type, unsigned long index,
unsigned long tte_data, unsigned long vaddr)
{
unsigned long args[9];
args[0] = (unsigned long) prom_callmethod_name;
args[1] = 5;
args[2] = 1;
args[3] = (unsigned long) type;
args[4] = (unsigned int) prom_get_mmu_ihandle();
args[5] = vaddr;
args[6] = tte_data;
args[7] = index;
args[8] = (unsigned long) -1;
p1275_cmd_direct(args);
return (long) args[8];
}
long prom_itlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return tlb_load("SUNW,itlb-load", index, tte_data, vaddr);
}
long prom_dtlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return tlb_load("SUNW,dtlb-load", index, tte_data, vaddr);
}
int prom_map(int mode, unsigned long size,
unsigned long vaddr, unsigned long paddr)
{
unsigned long args[11];
int ret;
args[0] = (unsigned long) prom_callmethod_name;
args[1] = 7;
args[2] = 1;
args[3] = (unsigned long) prom_map_name;
args[4] = (unsigned int) prom_get_mmu_ihandle();
args[5] = (unsigned int) mode;
args[6] = size;
args[7] = vaddr;
args[8] = 0;
args[9
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