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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rtc-ps3.c (1393B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * PS3 RTC Driver
      4 *
      5 * Copyright 2009 Sony Corporation
      6 */
      7
      8#include <linux/kernel.h>
      9#include <linux/module.h>
     10#include <linux/platform_device.h>
     11#include <linux/rtc.h>
     12
     13#include <asm/lv1call.h>
     14#include <asm/ps3.h>
     15
     16
     17static u64 read_rtc(void)
     18{
     19	int result;
     20	u64 rtc_val;
     21	u64 tb_val;
     22
     23	result = lv1_get_rtc(&rtc_val, &tb_val);
     24	BUG_ON(result);
     25
     26	return rtc_val;
     27}
     28
     29static int ps3_get_time(struct device *dev, struct rtc_time *tm)
     30{
     31	rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
     32	return 0;
     33}
     34
     35static int ps3_set_time(struct device *dev, struct rtc_time *tm)
     36{
     37	ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc());
     38	return 0;
     39}
     40
     41static const struct rtc_class_ops ps3_rtc_ops = {
     42	.read_time = ps3_get_time,
     43	.set_time = ps3_set_time,
     44};
     45
     46static int __init ps3_rtc_probe(struct platform_device *dev)
     47{
     48	struct rtc_device *rtc;
     49
     50	rtc = devm_rtc_allocate_device(&dev->dev);
     51	if (IS_ERR(rtc))
     52		return PTR_ERR(rtc);
     53
     54	rtc->ops = &ps3_rtc_ops;
     55	rtc->range_max = U64_MAX;
     56
     57	platform_set_drvdata(dev, rtc);
     58
     59	return devm_rtc_register_device(rtc);
     60}
     61
     62static struct platform_driver ps3_rtc_driver = {
     63	.driver = {
     64		.name = "rtc-ps3",
     65	},
     66};
     67
     68module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
     69
     70MODULE_AUTHOR("Sony Corporation");
     71MODULE_LICENSE("GPL");
     72MODULE_DESCRIPTION("ps3 RTC driver");
     73MODULE_ALIAS("platform:rtc-ps3");