arch/mips/sibyte/swarm/setup.c

Source file repositories/reference/linux-study-clean/arch/mips/sibyte/swarm/setup.c

File Facts

System
Linux kernel
Corpus path
arch/mips/sibyte/swarm/setup.c
Extension
.c
Size
3416 bytes
Lines
170
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation
 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
 */

/*
 * Setup code for the SWARM board
 */

#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/screen_info.h>
#include <linux/initrd.h>

#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/traps.h>
#include <asm/sibyte/sb1250.h>
#ifdef CONFIG_SIBYTE_BCM1x80
#include <asm/sibyte/bcm1480_regs.h>
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
#include <asm/sibyte/sb1250_regs.h>
#else
#error invalid SiByte board configuration
#endif
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/board.h>

#ifdef CONFIG_SIBYTE_BCM1x80
extern void bcm1480_setup(void);
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
extern void sb1250_setup(void);
#else
#error invalid SiByte board configuration
#endif

extern int xicor_probe(void);
extern int xicor_set_time(time64_t);
extern time64_t xicor_get_time(void);

extern int m41t81_probe(void);
extern int m41t81_set_time(time64_t);
extern time64_t m41t81_get_time(void);

const char *get_system_type(void)
{
	return "SiByte " SIBYTE_BOARD_NAME;
}

int swarm_be_handler(struct pt_regs *regs, int is_fixup)
{
	if (!is_fixup && (regs->cp0_cause & 4)) {
		/* Data bus error - print PA */
		printk("DBE physical address: %010Lx\n",
		       __read_64bit_c0_register($26, 1));
	}
	return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
}

enum swarm_rtc_type {
	RTC_NONE,
	RTC_XICOR,
	RTC_M41T81,
};

enum swarm_rtc_type swarm_rtc_type;

void read_persistent_clock64(struct timespec64 *ts)
{
	time64_t sec;

	switch (swarm_rtc_type) {
	case RTC_XICOR:
		sec = xicor_get_time();
		break;

	case RTC_M41T81:
		sec = m41t81_get_time();
		break;

	case RTC_NONE:

Annotation

Implementation Notes