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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mvme7100.c (2853B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Board setup routines for the Emerson/Artesyn MVME7100
      4 *
      5 * Copyright 2016 Elettra-Sincrotrone Trieste S.C.p.A.
      6 *
      7 * Author: Alessio Igor Bogani <alessio.bogani@elettra.eu>
      8 *
      9 * Based on earlier code by:
     10 *
     11 *	Ajit Prem <ajit.prem@emerson.com>
     12 *	Copyright 2008 Emerson
     13 *
     14 * USB host fixup is borrowed by:
     15 *
     16 *	Martyn Welch <martyn.welch@ge.com>
     17 *	Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
     18 */
     19
     20#include <linux/pci.h>
     21#include <linux/of.h>
     22#include <linux/of_fdt.h>
     23#include <linux/of_platform.h>
     24#include <linux/of_address.h>
     25#include <asm/udbg.h>
     26#include <asm/mpic.h>
     27#include <sysdev/fsl_soc.h>
     28#include <sysdev/fsl_pci.h>
     29
     30#include "mpc86xx.h"
     31
     32#define MVME7100_INTERRUPT_REG_2_OFFSET	0x05
     33#define MVME7100_DS1375_MASK		0x40
     34#define MVME7100_MAX6649_MASK		0x20
     35#define MVME7100_ABORT_MASK		0x10
     36
     37/*
     38 * Setup the architecture
     39 */
     40static void __init mvme7100_setup_arch(void)
     41{
     42	struct device_node *bcsr_node;
     43	void __iomem *mvme7100_regs = NULL;
     44	u8 reg;
     45
     46	if (ppc_md.progress)
     47		ppc_md.progress("mvme7100_setup_arch()", 0);
     48
     49#ifdef CONFIG_SMP
     50	mpc86xx_smp_init();
     51#endif
     52
     53	fsl_pci_assign_primary();
     54
     55	/* Remap BCSR registers */
     56	bcsr_node = of_find_compatible_node(NULL, NULL,
     57			"artesyn,mvme7100-bcsr");
     58	if (bcsr_node) {
     59		mvme7100_regs = of_iomap(bcsr_node, 0);
     60		of_node_put(bcsr_node);
     61	}
     62
     63	if (mvme7100_regs) {
     64		/* Disable ds1375, max6649, and abort interrupts */
     65		reg = readb(mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
     66		reg |= MVME7100_DS1375_MASK | MVME7100_MAX6649_MASK
     67			| MVME7100_ABORT_MASK;
     68		writeb(reg, mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
     69	} else
     70		pr_warn("Unable to map board registers\n");
     71
     72	pr_info("MVME7100 board from Artesyn\n");
     73}
     74
     75/*
     76 * Called very early, device-tree isn't unflattened
     77 */
     78static int __init mvme7100_probe(void)
     79{
     80	unsigned long root = of_get_flat_dt_root();
     81
     82	return of_flat_dt_is_compatible(root, "artesyn,MVME7100");
     83}
     84
     85static void mvme7100_usb_host_fixup(struct pci_dev *pdev)
     86{
     87	unsigned int val;
     88
     89	if (!machine_is(mvme7100))
     90		return;
     91
     92	/* Ensure only ports 1 & 2 are enabled */
     93	pci_read_config_dword(pdev, 0xe0, &val);
     94	pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x2);
     95
     96	/* System clock is 48-MHz Oscillator and EHCI Enabled. */
     97	pci_write_config_dword(pdev, 0xe4, 1 << 5);
     98}
     99DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
    100	mvme7100_usb_host_fixup);
    101
    102machine_arch_initcall(mvme7100, mpc86xx_common_publish_devices);
    103
    104define_machine(mvme7100) {
    105	.name			= "MVME7100",
    106	.probe			= mvme7100_probe,
    107	.setup_arch		= mvme7100_setup_arch,
    108	.init_IRQ		= mpc86xx_init_irq,
    109	.get_irq		= mpic_get_irq,
    110	.time_init		= mpc86xx_time_init,
    111	.calibrate_decr		= generic_calibrate_decr,
    112	.progress		= udbg_progress,
    113#ifdef CONFIG_PCI
    114	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
    115#endif
    116};