cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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setup.c (3556B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
      4 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
      5 */
      6
      7/*
      8 * Setup code for the SWARM board
      9 */
     10
     11#include <linux/spinlock.h>
     12#include <linux/mm.h>
     13#include <linux/memblock.h>
     14#include <linux/init.h>
     15#include <linux/kernel.h>
     16#include <linux/screen_info.h>
     17#include <linux/initrd.h>
     18
     19#include <asm/irq.h>
     20#include <asm/io.h>
     21#include <asm/bootinfo.h>
     22#include <asm/mipsregs.h>
     23#include <asm/reboot.h>
     24#include <asm/time.h>
     25#include <asm/traps.h>
     26#include <asm/sibyte/sb1250.h>
     27#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
     28#include <asm/sibyte/bcm1480_regs.h>
     29#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
     30#include <asm/sibyte/sb1250_regs.h>
     31#else
     32#error invalid SiByte board configuration
     33#endif
     34#include <asm/sibyte/sb1250_genbus.h>
     35#include <asm/sibyte/board.h>
     36
     37#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
     38extern void bcm1480_setup(void);
     39#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
     40extern void sb1250_setup(void);
     41#else
     42#error invalid SiByte board configuration
     43#endif
     44
     45extern int xicor_probe(void);
     46extern int xicor_set_time(time64_t);
     47extern time64_t xicor_get_time(void);
     48
     49extern int m41t81_probe(void);
     50extern int m41t81_set_time(time64_t);
     51extern time64_t m41t81_get_time(void);
     52
     53const char *get_system_type(void)
     54{
     55	return "SiByte " SIBYTE_BOARD_NAME;
     56}
     57
     58int swarm_be_handler(struct pt_regs *regs, int is_fixup)
     59{
     60	if (!is_fixup && (regs->cp0_cause & 4)) {
     61		/* Data bus error - print PA */
     62		printk("DBE physical address: %010Lx\n",
     63		       __read_64bit_c0_register($26, 1));
     64	}
     65	return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
     66}
     67
     68enum swarm_rtc_type {
     69	RTC_NONE,
     70	RTC_XICOR,
     71	RTC_M41T81,
     72};
     73
     74enum swarm_rtc_type swarm_rtc_type;
     75
     76void read_persistent_clock64(struct timespec64 *ts)
     77{
     78	time64_t sec;
     79
     80	switch (swarm_rtc_type) {
     81	case RTC_XICOR:
     82		sec = xicor_get_time();
     83		break;
     84
     85	case RTC_M41T81:
     86		sec = m41t81_get_time();
     87		break;
     88
     89	case RTC_NONE:
     90	default:
     91		sec = mktime64(2000, 1, 1, 0, 0, 0);
     92		break;
     93	}
     94	ts->tv_sec = sec;
     95	ts->tv_nsec = 0;
     96}
     97
     98int update_persistent_clock64(struct timespec64 now)
     99{
    100	time64_t sec = now.tv_sec;
    101
    102	switch (swarm_rtc_type) {
    103	case RTC_XICOR:
    104		return xicor_set_time(sec);
    105
    106	case RTC_M41T81:
    107		return m41t81_set_time(sec);
    108
    109	case RTC_NONE:
    110	default:
    111		return -1;
    112	}
    113}
    114
    115void __init plat_mem_setup(void)
    116{
    117#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
    118	bcm1480_setup();
    119#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
    120	sb1250_setup();
    121#else
    122#error invalid SiByte board configuration
    123#endif
    124
    125	mips_set_be_handler(swarm_be_handler);
    126
    127	if (xicor_probe())
    128		swarm_rtc_type = RTC_XICOR;
    129	if (m41t81_probe())
    130		swarm_rtc_type = RTC_M41T81;
    131
    132#ifdef CONFIG_VT
    133	screen_info = (struct screen_info) {
    134		.orig_video_page	= 52,
    135		.orig_video_mode	= 3,
    136		.orig_video_cols	= 80,
    137		.flags			= 12,
    138		.orig_video_ega_bx	= 3,
    139		.orig_video_lines	= 25,
    140		.orig_video_isVGA	= 0x22,
    141		.orig_video_points	= 16,
    142       };
    143       /* XXXKW for CFE, get lines/cols from environment */
    144#endif
    145}
    146
    147#ifdef LEDS_PHYS
    148
    149#ifdef CONFIG_SIBYTE_CARMEL
    150/* XXXKW need to detect Monterey/LittleSur/etc */
    151#undef LEDS_PHYS
    152#define LEDS_PHYS MLEDS_PHYS
    153#endif
    154
    155void setleds(char *str)
    156{
    157	void *reg;
    158	int i;
    159
    160	for (i = 0; i < 4; i++) {
    161		reg = IOADDR(LEDS_PHYS) + 0x20 + ((3 - i) << 3);
    162
    163		if (!str[i])
    164			writeb(' ', reg);
    165		else
    166			writeb(str[i], reg);
    167	}
    168}
    169
    170#endif /* LEDS_PHYS */