448 lines
8.8 KiB
C
448 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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/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);
|
|
|
|
/* 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();
|
|
}
|
|
|
|
/* 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] = paddr;
|
|
args[10] = (unsigned long) -1;
|
|
|
|
p1275_cmd_direct(args);
|
|
|
|
ret = (int) args[10];
|
|
if (ret == 0)
|
|
ret = -1;
|
|
return ret;
|
|
}
|
|
|
|
void prom_unmap(unsigned long size, unsigned long vaddr)
|
|
{
|
|
unsigned long args[7];
|
|
|
|
args[0] = (unsigned long) prom_callmethod_name;
|
|
args[1] = 4;
|
|
args[2] = 0;
|
|
args[3] = (unsigned long) prom_unmap_name;
|
|
args[4] = (unsigned int) prom_get_mmu_ihandle();
|
|
args[5] = size;
|
|
args[6] = vaddr;
|
|
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
/* Set aside physical memory which is not touched or modified
|
|
* across soft resets.
|
|
*/
|
|
int prom_retain(const char *name, unsigned long size,
|
|
unsigned long align, unsigned long *paddr)
|
|
{
|
|
unsigned long args[11];
|
|
|
|
args[0] = (unsigned long) prom_callmethod_name;
|
|
args[1] = 5;
|
|
args[2] = 3;
|
|
args[3] = (unsigned long) "SUNW,retain";
|
|
args[4] = (unsigned int) prom_get_memory_ihandle();
|
|
args[5] = align;
|
|
args[6] = size;
|
|
args[7] = (unsigned long) name;
|
|
args[8] = (unsigned long) -1;
|
|
args[9] = (unsigned long) -1;
|
|
args[10] = (unsigned long) -1;
|
|
|
|
p1275_cmd_direct(args);
|
|
|
|
if (args[8])
|
|
return (int) args[8];
|
|
|
|
/* Next we get "phys_high" then "phys_low". On 64-bit
|
|
* the phys_high cell is don't care since the phys_low
|
|
* cell has the full value.
|
|
*/
|
|
*paddr = args[10];
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Get "Unumber" string for the SIMM at the given
|
|
* memory address. Usually this will be of the form
|
|
* "Uxxxx" where xxxx is a decimal number which is
|
|
* etched into the motherboard next to the SIMM slot
|
|
* in question.
|
|
*/
|
|
int prom_getunumber(int syndrome_code,
|
|
unsigned long phys_addr,
|
|
char *buf, int buflen)
|
|
{
|
|
unsigned long args[12];
|
|
|
|
args[0] = (unsigned long) prom_callmethod_name;
|
|
args[1] = 7;
|
|
args[2] = 2;
|
|
args[3] = (unsigned long) "SUNW,get-unumber";
|
|
args[4] = (unsigned int) prom_get_memory_ihandle();
|
|
args[5] = buflen;
|
|
args[6] = (unsigned long) buf;
|
|
args[7] = 0;
|
|
args[8] = phys_addr;
|
|
args[9] = (unsigned int) syndrome_code;
|
|
args[10] = (unsigned long) -1;
|
|
args[11] = (unsigned long) -1;
|
|
|
|
p1275_cmd_direct(args);
|
|
|
|
return (int) args[10];
|
|
}
|
|
|
|
/* Power management extensions. */
|
|
void prom_sleepself(void)
|
|
{
|
|
unsigned long args[3];
|
|
|
|
args[0] = (unsigned long) "SUNW,sleep-self";
|
|
args[1] = 0;
|
|
args[2] = 0;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
int prom_sleepsystem(void)
|
|
{
|
|
unsigned long args[4];
|
|
|
|
args[0] = (unsigned long) "SUNW,sleep-system";
|
|
args[1] = 0;
|
|
args[2] = 1;
|
|
args[3] = (unsigned long) -1;
|
|
p1275_cmd_direct(args);
|
|
|
|
return (int) args[3];
|
|
}
|
|
|
|
int prom_wakeupsystem(void)
|
|
{
|
|
unsigned long args[4];
|
|
|
|
args[0] = (unsigned long) "SUNW,wakeup-system";
|
|
args[1] = 0;
|
|
args[2] = 1;
|
|
args[3] = (unsigned long) -1;
|
|
p1275_cmd_direct(args);
|
|
|
|
return (int) args[3];
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
|
|
{
|
|
unsigned long args[6];
|
|
|
|
args[0] = (unsigned long) "SUNW,start-cpu";
|
|
args[1] = 3;
|
|
args[2] = 0;
|
|
args[3] = (unsigned int) cpunode;
|
|
args[4] = pc;
|
|
args[5] = arg;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
|
|
{
|
|
unsigned long args[6];
|
|
|
|
args[0] = (unsigned long) "SUNW,start-cpu-by-cpuid";
|
|
args[1] = 3;
|
|
args[2] = 0;
|
|
args[3] = (unsigned int) cpuid;
|
|
args[4] = pc;
|
|
args[5] = arg;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
void prom_stopcpu_cpuid(int cpuid)
|
|
{
|
|
unsigned long args[4];
|
|
|
|
args[0] = (unsigned long) "SUNW,stop-cpu-by-cpuid";
|
|
args[1] = 1;
|
|
args[2] = 0;
|
|
args[3] = (unsigned int) cpuid;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
void prom_stopself(void)
|
|
{
|
|
unsigned long args[3];
|
|
|
|
args[0] = (unsigned long) "SUNW,stop-self";
|
|
args[1] = 0;
|
|
args[2] = 0;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
void prom_idleself(void)
|
|
{
|
|
unsigned long args[3];
|
|
|
|
args[0] = (unsigned long) "SUNW,idle-self";
|
|
args[1] = 0;
|
|
args[2] = 0;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
|
|
void prom_resumecpu(int cpunode)
|
|
{
|
|
unsigned long args[4];
|
|
|
|
args[0] = (unsigned long) "SUNW,resume-cpu";
|
|
args[1] = 1;
|
|
args[2] = 0;
|
|
args[3] = (unsigned int) cpunode;
|
|
p1275_cmd_direct(args);
|
|
}
|
|
#endif
|