mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
33def8498f
Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.
Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.
Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
137 lines
2.2 KiB
C
137 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* -*- linux-c -*- ------------------------------------------------------- *
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright 2007 rPath, Inc. - All Rights Reserved
|
|
* Copyright 2009 Intel Corporation; author H. Peter Anvin
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Very simple screen and serial I/O
|
|
*/
|
|
|
|
#include "boot.h"
|
|
|
|
int early_serial_base;
|
|
|
|
#define XMTRDY 0x20
|
|
|
|
#define TXR 0 /* Transmit register (WRITE) */
|
|
#define LSR 5 /* Line Status */
|
|
|
|
/*
|
|
* These functions are in .inittext so they can be used to signal
|
|
* error during initialization.
|
|
*/
|
|
|
|
static void __section(".inittext") serial_putchar(int ch)
|
|
{
|
|
unsigned timeout = 0xffff;
|
|
|
|
while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
|
|
cpu_relax();
|
|
|
|
outb(ch, early_serial_base + TXR);
|
|
}
|
|
|
|
static void __section(".inittext") bios_putchar(int ch)
|
|
{
|
|
struct biosregs ireg;
|
|
|
|
initregs(&ireg);
|
|
ireg.bx = 0x0007;
|
|
ireg.cx = 0x0001;
|
|
ireg.ah = 0x0e;
|
|
ireg.al = ch;
|
|
intcall(0x10, &ireg, NULL);
|
|
}
|
|
|
|
void __section(".inittext") putchar(int ch)
|
|
{
|
|
if (ch == '\n')
|
|
putchar('\r'); /* \n -> \r\n */
|
|
|
|
bios_putchar(ch);
|
|
|
|
if (early_serial_base != 0)
|
|
serial_putchar(ch);
|
|
}
|
|
|
|
void __section(".inittext") puts(const char *str)
|
|
{
|
|
while (*str)
|
|
putchar(*str++);
|
|
}
|
|
|
|
/*
|
|
* Read the CMOS clock through the BIOS, and return the
|
|
* seconds in BCD.
|
|
*/
|
|
|
|
static u8 gettime(void)
|
|
{
|
|
struct biosregs ireg, oreg;
|
|
|
|
initregs(&ireg);
|
|
ireg.ah = 0x02;
|
|
intcall(0x1a, &ireg, &oreg);
|
|
|
|
return oreg.dh;
|
|
}
|
|
|
|
/*
|
|
* Read from the keyboard
|
|
*/
|
|
int getchar(void)
|
|
{
|
|
struct biosregs ireg, oreg;
|
|
|
|
initregs(&ireg);
|
|
/* ireg.ah = 0x00; */
|
|
intcall(0x16, &ireg, &oreg);
|
|
|
|
return oreg.al;
|
|
}
|
|
|
|
static int kbd_pending(void)
|
|
{
|
|
struct biosregs ireg, oreg;
|
|
|
|
initregs(&ireg);
|
|
ireg.ah = 0x01;
|
|
intcall(0x16, &ireg, &oreg);
|
|
|
|
return !(oreg.eflags & X86_EFLAGS_ZF);
|
|
}
|
|
|
|
void kbd_flush(void)
|
|
{
|
|
for (;;) {
|
|
if (!kbd_pending())
|
|
break;
|
|
getchar();
|
|
}
|
|
}
|
|
|
|
int getchar_timeout(void)
|
|
{
|
|
int cnt = 30;
|
|
int t0, t1;
|
|
|
|
t0 = gettime();
|
|
|
|
while (cnt) {
|
|
if (kbd_pending())
|
|
return getchar();
|
|
|
|
t1 = gettime();
|
|
if (t0 != t1) {
|
|
cnt--;
|
|
t0 = t1;
|
|
}
|
|
}
|
|
|
|
return 0; /* Timeout! */
|
|
}
|
|
|