cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

solutionengine.c (2481B)

      1/*
      2 * Flash and EPROM on Hitachi Solution Engine and similar boards.
      3 *
      4 * (C) 2001 Red Hat, Inc.
      5 *
      6 * GPL'd
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/types.h>
     11#include <linux/kernel.h>
     12#include <linux/init.h>
     13#include <asm/io.h>
     14#include <linux/mtd/mtd.h>
     15#include <linux/mtd/map.h>
     16#include <linux/mtd/partitions.h>
     17#include <linux/errno.h>
     18
     19static struct mtd_info *flash_mtd;
     20static struct mtd_info *eprom_mtd;
     21
     22struct map_info soleng_eprom_map = {
     23	.name = "Solution Engine EPROM",
     24	.size = 0x400000,
     25	.bankwidth = 4,
     26};
     27
     28struct map_info soleng_flash_map = {
     29	.name = "Solution Engine FLASH",
     30	.size = 0x400000,
     31	.bankwidth = 4,
     32};
     33
     34static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
     35
     36static int __init init_soleng_maps(void)
     37{
     38	/* First probe at offset 0 */
     39	soleng_flash_map.phys = 0;
     40	soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);
     41	soleng_eprom_map.phys = 0x01000000;
     42	soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);
     43	simple_map_init(&soleng_eprom_map);
     44	simple_map_init(&soleng_flash_map);
     45
     46	printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
     47	flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
     48	if (!flash_mtd) {
     49		/* Not there. Try swapping */
     50		printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");
     51		soleng_flash_map.phys = 0x01000000;
     52		soleng_flash_map.virt = P2SEGADDR(0x01000000);
     53		soleng_eprom_map.phys = 0;
     54		soleng_eprom_map.virt = P1SEGADDR(0);
     55		flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
     56		if (!flash_mtd) {
     57			/* Eep. */
     58			printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
     59			return -ENXIO;
     60		}
     61	}
     62	printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n",
     63	       &soleng_flash_map.phys,
     64	       &soleng_eprom_map.phys);
     65	flash_mtd->owner = THIS_MODULE;
     66
     67	eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);
     68	if (eprom_mtd) {
     69		eprom_mtd->owner = THIS_MODULE;
     70		mtd_device_register(eprom_mtd, NULL, 0);
     71	}
     72
     73	mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0);
     74
     75	return 0;
     76}
     77
     78static void __exit cleanup_soleng_maps(void)
     79{
     80	if (eprom_mtd) {
     81		mtd_device_unregister(eprom_mtd);
     82		map_destroy(eprom_mtd);
     83	}
     84
     85	mtd_device_unregister(flash_mtd);
     86	map_destroy(flash_mtd);
     87}
     88
     89module_init(init_soleng_maps);
     90module_exit(cleanup_soleng_maps);
     91
     92MODULE_LICENSE("GPL");
     93MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
     94MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");
     95