cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ip32-setup.c (2343B)

      1/*
      2 * IP32 basic setup
      3 *
      4 * This file is subject to the terms and conditions of the GNU General Public
      5 * License.  See the file "COPYING" in the main directory of this archive
      6 * for more details.
      7 *
      8 * Copyright (C) 2000 Harald Koerfgen
      9 * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets
     10 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
     11 */
     12#include <linux/console.h>
     13#include <linux/init.h>
     14#include <linux/interrupt.h>
     15#include <linux/param.h>
     16#include <linux/sched.h>
     17
     18#include <asm/bootinfo.h>
     19#include <asm/mipsregs.h>
     20#include <asm/mmu_context.h>
     21#include <asm/sgialib.h>
     22#include <asm/time.h>
     23#include <asm/traps.h>
     24#include <asm/io.h>
     25#include <asm/ip32/crime.h>
     26#include <asm/ip32/mace.h>
     27#include <asm/ip32/ip32_ints.h>
     28
     29extern void ip32_be_init(void);
     30extern void crime_init(void);
     31
     32#ifdef CONFIG_SGI_O2MACE_ETH
     33/*
     34 * This is taken care of in here 'cause they say using Arc later on is
     35 * problematic
     36 */
     37extern char o2meth_eaddr[8];
     38static inline unsigned char str2hexnum(unsigned char c)
     39{
     40	if (c >= '0' && c <= '9')
     41		return c - '0';
     42	if (c >= 'a' && c <= 'f')
     43		return c - 'a' + 10;
     44	return 0; /* foo */
     45}
     46
     47static inline void str2eaddr(unsigned char *ea, unsigned char *str)
     48{
     49	int i;
     50
     51	for (i = 0; i < 6; i++) {
     52		unsigned char num;
     53
     54		if(*str == ':')
     55			str++;
     56		num = str2hexnum(*str++) << 4;
     57		num |= (str2hexnum(*str++));
     58		ea[i] = num;
     59	}
     60}
     61#endif
     62
     63/* An arbitrary time; this can be decreased if reliability looks good */
     64#define WAIT_MS 10
     65
     66void __init plat_time_init(void)
     67{
     68	printk(KERN_INFO "Calibrating system timer... ");
     69	write_c0_count(0);
     70	crime->timer = 0;
     71	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
     72	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
     73	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
     74}
     75
     76void __init plat_mem_setup(void)
     77{
     78	board_be_init = ip32_be_init;
     79
     80#ifdef CONFIG_SGI_O2MACE_ETH
     81	{
     82		char *mac = ArcGetEnvironmentVariable("eaddr");
     83		str2eaddr(o2meth_eaddr, mac);
     84	}
     85#endif
     86
     87#if defined(CONFIG_SERIAL_CORE_CONSOLE)
     88	{
     89		char* con = ArcGetEnvironmentVariable("console");
     90		if (con && *con == 'd') {
     91			static char options[8] __initdata;
     92			char *baud = ArcGetEnvironmentVariable("dbaud");
     93			if (baud)
     94				strcpy(options, baud);
     95			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
     96					      baud ? options : NULL);
     97		}
     98	}
     99#endif
    100}