patch-2.4.20 linux-2.4.20/arch/parisc/kernel/real1.c
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- Lines: 155
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.19/arch/parisc/kernel/real1.c
- Orig date:
Tue Dec 5 12:29:39 2000
diff -urN linux-2.4.19/arch/parisc/kernel/real1.c linux-2.4.20/arch/parisc/kernel/real1.c
@@ -1,154 +0,0 @@
-/*
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2000 Hewlett Packard (Paul Bame bame@puffin.external.hp.com)
- *
- * most of these calls might reasonably be moved to ../kernel -PB
- *
- * The basic principle is to construct a stack frame in C then call
- * some assembly which adopts that stack, does some rfi magic, may
- * switch wide/narrow mode, and calls the routine described by the
- * 'fn' parameter WHICH IS NOT A FUNCTION POINTER!!!!!!!!!!!!!!!!
- */
-#include <linux/spinlock.h>
-#include <asm/system.h>
-#include <stdarg.h>
-#include <asm/pgtable.h> /* for __pa() */
-#include <asm/pdc.h>
-
-static spinlock_t pdc_lock = SPIN_LOCK_UNLOCKED;
-
-/***************** 32-bit real-mode calls ***********/
-/* The struct below is used
- * to overlay real_stack (real2.S), preparing a 32-bit call frame.
- * real32_call_asm() then uses this stack in narrow real mode
- */
-
-struct narrow_stack {
- /* use int, not long which is 64 bits */
- unsigned int arg13;
- unsigned int arg12;
- unsigned int arg11;
- unsigned int arg10;
- unsigned int arg9;
- unsigned int arg8;
- unsigned int arg7;
- unsigned int arg6;
- unsigned int arg5;
- unsigned int arg4;
- unsigned int arg3;
- unsigned int arg2;
- unsigned int arg1;
- unsigned int arg0;
- unsigned int frame_marker[8];
- unsigned int sp;
- /* in reality, there's nearly 8k of stack after this */
-};
-
-long
-real32_call(unsigned long fn, ...)
-{
- unsigned long r;
- va_list args;
- unsigned long flags;
- extern struct narrow_stack real_stack;
- extern unsigned long real32_call_asm(unsigned int *,
- unsigned int *, unsigned int);
-
- va_start(args, fn);
- real_stack.arg0 = va_arg(args, unsigned int);
- real_stack.arg1 = va_arg(args, unsigned int);
- real_stack.arg2 = va_arg(args, unsigned int);
- real_stack.arg3 = va_arg(args, unsigned int);
- real_stack.arg4 = va_arg(args, unsigned int);
- real_stack.arg5 = va_arg(args, unsigned int);
- real_stack.arg6 = va_arg(args, unsigned int);
- real_stack.arg7 = va_arg(args, unsigned int);
- real_stack.arg8 = va_arg(args, unsigned int);
- real_stack.arg9 = va_arg(args, unsigned int);
- real_stack.arg10 = va_arg(args, unsigned int);
- real_stack.arg11 = va_arg(args, unsigned int);
- real_stack.arg12 = va_arg(args, unsigned int);
- real_stack.arg13 = va_arg(args, unsigned int);
- va_end(args);
-
- if (fn == 0) {
- /* mem_pdc call */
- fn = PAGE0->mem_pdc;
- }
-
- spin_lock_irqsave(&pdc_lock, flags);
- r = real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
- spin_unlock_irqrestore(&pdc_lock, flags);
-
- return r;
-}
-
-#ifdef __LP64__
-/***************** 64-bit real-mode calls ***********/
-
-struct wide_stack {
- unsigned long arg0;
- unsigned long arg1;
- unsigned long arg2;
- unsigned long arg3;
- unsigned long arg4;
- unsigned long arg5;
- unsigned long arg6;
- unsigned long arg7;
- unsigned long arg8;
- unsigned long arg9;
- unsigned long arg10;
- unsigned long arg11;
- unsigned long arg12;
- unsigned long arg13;
- unsigned long frame_marker[2]; /* rp, previous sp */
- unsigned long sp;
- /* in reality, there's nearly 8k of stack after this */
-};
-
-long
-real64_call(unsigned long fn, ...)
-{
- unsigned long r;
- va_list args;
- unsigned long flags;
- extern struct wide_stack real_stack;
- extern unsigned long real64_call_asm(unsigned long *,
- unsigned long *, unsigned long);
-
- va_start(args, fn);
- real_stack.arg0 = va_arg(args, unsigned long);
- real_stack.arg1 = va_arg(args, unsigned long);
- real_stack.arg2 = va_arg(args, unsigned long);
- real_stack.arg3 = va_arg(args, unsigned long);
- real_stack.arg4 = va_arg(args, unsigned long);
- real_stack.arg5 = va_arg(args, unsigned long);
- real_stack.arg6 = va_arg(args, unsigned long);
- real_stack.arg7 = va_arg(args, unsigned long);
- real_stack.arg8 = va_arg(args, unsigned long);
- real_stack.arg9 = va_arg(args, unsigned long);
- real_stack.arg10 = va_arg(args, unsigned long);
- real_stack.arg11 = va_arg(args, unsigned long);
- real_stack.arg12 = va_arg(args, unsigned long);
- real_stack.arg13 = va_arg(args, unsigned long);
- va_end(args);
-
- if (fn == 0) {
- /* mem_pdc call */
- fn = PAGE0->mem_pdc_hi;
- fn <<= 32;
- fn |= PAGE0->mem_pdc;
- }
-
- spin_lock_irqsave(&pdc_lock, flags);
- r = real64_call_asm(&real_stack.sp, &real_stack.arg0, fn);
- spin_unlock_irqrestore(&pdc_lock, flags);
-
- return r;
-}
-
-#endif
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