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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simtec-nor.c (1529B)

      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// Copyright (c) 2008 Simtec Electronics
      4//	http://armlinux.simtec.co.uk/
      5//	Ben Dooks <ben@simtec.co.uk>
      6//
      7// Simtec NOR mapping
      8
      9#include <linux/module.h>
     10#include <linux/types.h>
     11#include <linux/init.h>
     12#include <linux/kernel.h>
     13#include <linux/platform_device.h>
     14
     15#include <linux/mtd/mtd.h>
     16#include <linux/mtd/map.h>
     17#include <linux/mtd/physmap.h>
     18#include <linux/mtd/partitions.h>
     19
     20#include <asm/mach/arch.h>
     21#include <asm/mach/map.h>
     22#include <asm/mach/irq.h>
     23
     24#include "map.h"
     25
     26#include "bast.h"
     27#include "simtec.h"
     28
     29static void simtec_nor_vpp(struct platform_device *pdev, int vpp)
     30{
     31	unsigned int val;
     32
     33	val = __raw_readb(BAST_VA_CTRL3);
     34
     35	printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
     36
     37	if (vpp)
     38		val |= BAST_CPLD_CTRL3_ROMWEN;
     39	else
     40		val &= ~BAST_CPLD_CTRL3_ROMWEN;
     41
     42	__raw_writeb(val, BAST_VA_CTRL3);
     43}
     44
     45static struct physmap_flash_data simtec_nor_pdata = {
     46	.width		= 2,
     47	.set_vpp	= simtec_nor_vpp,
     48	.nr_parts	= 0,
     49};
     50
     51static struct resource simtec_nor_resource[] = {
     52	[0] = DEFINE_RES_MEM(S3C2410_CS1 + 0x4000000, SZ_8M),
     53};
     54
     55static struct platform_device simtec_device_nor = {
     56	.name		= "physmap-flash",
     57	.id		= -1,
     58	.num_resources	= ARRAY_SIZE(simtec_nor_resource),
     59	.resource	= simtec_nor_resource,
     60	.dev		= {
     61		.platform_data = &simtec_nor_pdata,
     62	},
     63};
     64
     65void __init nor_simtec_init(void)
     66{
     67	int ret;
     68
     69	ret = platform_device_register(&simtec_device_nor);
     70	if (ret < 0)
     71		printk(KERN_ERR "failed to register physmap-flash device\n");
     72	else
     73		simtec_nor_vpp(NULL, 1);
     74}