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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mp900.c (2210B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  linux/arch/arm/mach-pxa/mp900.c
      4 *
      5 *  Support for the NEC MobilePro900/C platform
      6 *
      7 *  Based on mach-pxa/gumstix.c
      8 *
      9 *  2007, 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
     10 *  2007, 2008 Michael Petchkovsky <mkpetch@internode.on.net>
     11 */
     12
     13#include <linux/init.h>
     14#include <linux/device.h>
     15#include <linux/platform_device.h>
     16#include <linux/types.h>
     17#include <linux/usb/isp116x.h>
     18
     19#include <asm/mach-types.h>
     20#include <asm/mach/arch.h>
     21
     22#include "pxa25x.h"
     23#include "generic.h"
     24
     25static void isp116x_pfm_delay(struct device *dev, int delay)
     26{
     27
     28	/* 400MHz PXA2 = 2.5ns / instruction */
     29
     30	int cyc = delay / 10;
     31
     32	/* 4 Instructions = 4 x 2.5ns = 10ns */
     33	__asm__ volatile ("0:\n"
     34		"subs %0, %1, #1\n"
     35		"bge 0b\n"
     36		:"=r" (cyc)
     37		:"0"(cyc)
     38	);
     39}
     40
     41static struct isp116x_platform_data isp116x_pfm_data = {
     42	.remote_wakeup_enable = 1,
     43	.delay = isp116x_pfm_delay,
     44};
     45
     46static struct resource isp116x_pfm_resources[] = {
     47	[0] =	{
     48		.start	= 0x0d000000,
     49		.end	= 0x0d000000 + 1,
     50		.flags	= IORESOURCE_MEM,
     51		},
     52	[1] =	{
     53		.start  = 0x0d000000 + 4,
     54		.end	= 0x0d000000 + 5,
     55		.flags  = IORESOURCE_MEM,
     56		},
     57	[2] =	{
     58		.start	= 61,
     59		.end	= 61,
     60		.flags	= IORESOURCE_IRQ,
     61		},
     62};
     63
     64static struct platform_device mp900c_dummy_device = {
     65	.name		= "mp900c_dummy",
     66	.id		= -1,
     67};
     68
     69static struct platform_device mp900c_usb = {
     70	.name		= "isp116x-hcd",
     71	.num_resources	= ARRAY_SIZE(isp116x_pfm_resources),
     72	.resource	= isp116x_pfm_resources,
     73	.dev.platform_data = &isp116x_pfm_data,
     74};
     75
     76static struct platform_device *devices[] __initdata = {
     77	&mp900c_dummy_device,
     78	&mp900c_usb,
     79};
     80
     81static void __init mp900c_init(void)
     82{
     83	printk(KERN_INFO "MobilePro 900/C machine init\n");
     84	pxa_set_ffuart_info(NULL);
     85	pxa_set_btuart_info(NULL);
     86	pxa_set_stuart_info(NULL);
     87	platform_add_devices(devices, ARRAY_SIZE(devices));
     88}
     89
     90/* Maintainer - Michael Petchkovsky <mkpetch@internode.on.net> */
     91MACHINE_START(NEC_MP900, "MobilePro900/C")
     92	.atag_offset	= 0x220100,
     93	.init_time	= pxa_timer_init,
     94	.map_io		= pxa25x_map_io,
     95	.nr_irqs	= PXA_NR_IRQS,
     96	.init_irq	= pxa25x_init_irq,
     97	.handle_irq	= pxa25x_handle_irq,
     98	.init_machine	= mp900c_init,
     99	.restart	= pxa_restart,
    100MACHINE_END
    101