android_kernel_xiaomi_sm8350/arch/sparc64/prom/misc.c
David S. Miller 667bc389c7 [SPARC]: Kill 'prom_palette'.
The idea of this thing is we could save/restore the firmware's
palette when breaking in and out of the firmware prompt.

Only one driver implemented this (atyfb) and it's value is
questionable.  If you're just debugging you don't really
care that the characters end up being purple or whatever.

And we can provide better debugging and firmware command
facilities with minimal in-kernel console I/O drivers.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-18 15:28:16 -08:00

336 lines
7.5 KiB
C

/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
* 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 <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <asm/ldc.h>
int prom_service_exists(const char *service_name)
{
int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 1), service_name);
if (err)
return 0;
return 1;
}
void prom_sun4v_guest_soft_state(void)
{
const char *svc = "SUNW,soft-state-supported";
if (!prom_service_exists(svc))
return;
p1275_cmd(svc, P1275_INOUT(0, 0));
}
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_reboot(bcommand);
#endif
p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 0), bcommand);
}
/* Forth evaluate the expression contained in 'fstring'. */
void prom_feval(const char *fstring)
{
if (!fstring || fstring[0] == 0)
return;
p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 1), fstring);
}
#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 flags;
local_irq_save(flags);
#ifdef CONFIG_SMP
smp_capture();
#endif
p1275_cmd("enter", P1275_INOUT(0, 0));
#ifdef CONFIG_SMP
smp_release();
#endif
local_irq_restore(flags);
}
/* Drop into the prom, but completely terminate the program.
* No chance of continuing.
*/
void prom_halt(void)
{
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_power_off();
#endif
again:
p1275_cmd("exit", P1275_INOUT(0, 0));
goto again; /* PROM is out to get me -DaveM */
}
void prom_halt_power_off(void)
{
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled)
ldom_power_off();
#endif
p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
/* if nothing else helps, we just halt */
prom_halt();
}
/* Set prom sync handler to call function 'funcp'. */
void prom_setcallback(callback_func_t funcp)
{
if (!funcp)
return;
p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
P1275_INOUT(1, 1), funcp);
}
/* 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)
{
int node, 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;
int node, 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. */
long prom_itlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(5, 1)),
"SUNW,itlb-load",
prom_get_mmu_ihandle(),
/* And then our actual args are pushed backwards. */
vaddr,
tte_data,
index);
}
long prom_dtlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(5, 1)),
"SUNW,dtlb-load",
prom_get_mmu_ihandle(),
/* And then our actual args are pushed backwards. */
vaddr,
tte_data,
index);
}
int prom_map(int mode, unsigned long size,
unsigned long vaddr, unsigned long paddr)
{
int ret = p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_ARG(4, P1275_ARG_IN_64B) |
P1275_ARG(6, P1275_ARG_IN_64B) |
P1275_INOUT(7, 1)),
prom_map_name,
prom_get_mmu_ihandle(),
mode,
size,
vaddr,
0,
paddr);
if (ret == 0)
ret = -1;
return ret;
}
void prom_unmap(unsigned long size, unsigned long vaddr)
{
p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(4, 0)),
prom_unmap_name,
prom_get_mmu_ihandle(),
size,
vaddr);
}
/* Set aside physical memory which is not touched or modified
* across soft resets.
*/
unsigned long prom_retain(const char *name,
unsigned long pa_low, unsigned long pa_high,
long size, long align)
{
/* XXX I don't think we return multiple values correctly.
* XXX OBP supposedly returns pa_low/pa_high here, how does
* XXX it work?
*/
/* If align is zero, the pa_low/pa_high args are passed,
* else they are not.
*/
if (align == 0)
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
name, pa_low, pa_high, size, align);
else
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
name, size, align);
}
/* 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)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_OUT_BUF) |
P1275_ARG(6, P1275_ARG_IN_64B) |
P1275_INOUT(8, 2)),
"SUNW,get-unumber", prom_get_memory_ihandle(),
buflen, buf, P1275_SIZE(buflen),
0, phys_addr, syndrome_code);
}
/* Power management extensions. */
void prom_sleepself(void)
{
p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
}
int prom_sleepsystem(void)
{
return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
}
int prom_wakeupsystem(void)
{
return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
}
#ifdef CONFIG_SMP
void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg)
{
p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, arg);
}
void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg)
{
p1275_cmd("SUNW,start-cpu-by-cpuid", P1275_INOUT(3, 0),
cpuid, pc, arg);
}
void prom_stopcpu_cpuid(int cpuid)
{
p1275_cmd("SUNW,stop-cpu-by-cpuid", P1275_INOUT(1, 0),
cpuid);
}
void prom_stopself(void)
{
p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
}
void prom_idleself(void)
{
p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
}
void prom_resumecpu(int cpunode)
{
p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
}
#endif