forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.1 KiB
55 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* p1275.c: Sun IEEE 1275 PROM low level interface routines |
|
* |
|
* Copyright (C) 1996,1997 Jakub Jelinek ([email protected]) |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/sched.h> |
|
#include <linux/smp.h> |
|
#include <linux/string.h> |
|
#include <linux/spinlock.h> |
|
#include <linux/irqflags.h> |
|
|
|
#include <asm/openprom.h> |
|
#include <asm/oplib.h> |
|
#include <asm/spitfire.h> |
|
#include <asm/pstate.h> |
|
#include <asm/ldc.h> |
|
|
|
struct { |
|
long prom_callback; /* 0x00 */ |
|
void (*prom_cif_handler)(long *); /* 0x08 */ |
|
} p1275buf; |
|
|
|
extern void prom_world(int); |
|
|
|
extern void prom_cif_direct(unsigned long *args); |
|
extern void prom_cif_callback(void); |
|
|
|
/* |
|
* This provides SMP safety on the p1275buf. |
|
*/ |
|
DEFINE_RAW_SPINLOCK(prom_entry_lock); |
|
|
|
void p1275_cmd_direct(unsigned long *args) |
|
{ |
|
unsigned long flags; |
|
|
|
local_save_flags(flags); |
|
local_irq_restore((unsigned long)PIL_NMI); |
|
raw_spin_lock(&prom_entry_lock); |
|
|
|
prom_world(1); |
|
prom_cif_direct(args); |
|
prom_world(0); |
|
|
|
raw_spin_unlock(&prom_entry_lock); |
|
local_irq_restore(flags); |
|
} |
|
|
|
void prom_cif_init(void *cif_handler, void *cif_stack) |
|
{ |
|
p1275buf.prom_cif_handler = (void (*)(long *))cif_handler; |
|
}
|
|
|