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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ppa8548.c (2077B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * ppa8548 setup and early boot code.
      4 *
      5 * Copyright 2009 Prodrive B.V..
      6 *
      7 * By Stef van Os (see MAINTAINERS for contact information)
      8 *
      9 * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
     10 * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
     11 */
     12
     13#include <linux/stddef.h>
     14#include <linux/kernel.h>
     15#include <linux/init.h>
     16#include <linux/reboot.h>
     17#include <linux/seq_file.h>
     18#include <linux/of_fdt.h>
     19#include <linux/of_platform.h>
     20
     21#include <asm/machdep.h>
     22#include <asm/udbg.h>
     23#include <asm/mpic.h>
     24
     25#include <sysdev/fsl_soc.h>
     26
     27static void __init ppa8548_pic_init(void)
     28{
     29	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
     30			0, 256, " OpenPIC  ");
     31	BUG_ON(mpic == NULL);
     32	mpic_init(mpic);
     33}
     34
     35/*
     36 * Setup the architecture
     37 */
     38static void __init ppa8548_setup_arch(void)
     39{
     40	if (ppc_md.progress)
     41		ppc_md.progress("ppa8548_setup_arch()", 0);
     42}
     43
     44static void ppa8548_show_cpuinfo(struct seq_file *m)
     45{
     46	uint32_t svid, phid1;
     47
     48	svid = mfspr(SPRN_SVR);
     49
     50	seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
     51	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
     52
     53	/* Display cpu Pll setting */
     54	phid1 = mfspr(SPRN_HID1);
     55	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
     56}
     57
     58static const struct of_device_id of_bus_ids[] __initconst = {
     59	{ .name = "soc", },
     60	{ .type = "soc", },
     61	{ .compatible = "simple-bus", },
     62	{ .compatible = "gianfar", },
     63	{ .compatible = "fsl,srio", },
     64	{},
     65};
     66
     67static int __init declare_of_platform_devices(void)
     68{
     69	of_platform_bus_probe(NULL, of_bus_ids, NULL);
     70
     71	return 0;
     72}
     73machine_device_initcall(ppa8548, declare_of_platform_devices);
     74
     75/*
     76 * Called very early, device-tree isn't unflattened
     77 */
     78static int __init ppa8548_probe(void)
     79{
     80	return of_machine_is_compatible("ppa8548");
     81}
     82
     83define_machine(ppa8548) {
     84	.name		= "ppa8548",
     85	.probe		= ppa8548_probe,
     86	.setup_arch	= ppa8548_setup_arch,
     87	.init_IRQ	= ppa8548_pic_init,
     88	.show_cpuinfo	= ppa8548_show_cpuinfo,
     89	.get_irq	= mpic_get_irq,
     90	.calibrate_decr = generic_calibrate_decr,
     91	.progress	= udbg_progress,
     92};