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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init.c (2752B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Joshua Henderson, joshua.henderson@microchip.com
      4 * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
      5 */
      6#include <linux/init.h>
      7#include <linux/kernel.h>
      8#include <linux/of_address.h>
      9#include <linux/of_fdt.h>
     10#include <linux/of_platform.h>
     11#include <linux/platform_data/sdhci-pic32.h>
     12
     13#include <asm/fw/fw.h>
     14#include <asm/mips-boards/generic.h>
     15#include <asm/prom.h>
     16
     17#include "pic32mzda.h"
     18
     19const char *get_system_type(void)
     20{
     21	return "PIC32MZDA";
     22}
     23
     24void __init plat_mem_setup(void)
     25{
     26	void *dtb;
     27
     28	dtb = get_fdt();
     29	if (!dtb) {
     30		pr_err("pic32: no DTB found.\n");
     31		return;
     32	}
     33
     34	/*
     35	 * Load the builtin device tree. This causes the chosen node to be
     36	 * parsed resulting in our memory appearing.
     37	 */
     38	__dt_setup_arch(dtb);
     39
     40	pr_info("Found following command lines\n");
     41	pr_info(" boot_command_line: %s\n", boot_command_line);
     42	pr_info(" arcs_cmdline     : %s\n", arcs_cmdline);
     43#ifdef CONFIG_CMDLINE_BOOL
     44	pr_info(" builtin_cmdline  : %s\n", CONFIG_CMDLINE);
     45#endif
     46	if (dtb != __dtb_start)
     47		strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
     48
     49#ifdef CONFIG_EARLY_PRINTK
     50	fw_init_early_console(-1);
     51#endif
     52	pic32_config_init();
     53}
     54
     55static __init void pic32_init_cmdline(int argc, char *argv[])
     56{
     57	unsigned int count = COMMAND_LINE_SIZE - 1;
     58	int i;
     59	char *dst = &(arcs_cmdline[0]);
     60	char *src;
     61
     62	for (i = 1; i < argc && count; ++i) {
     63		src = argv[i];
     64		while (*src && count) {
     65			*dst++ = *src++;
     66			--count;
     67		}
     68		*dst++ = ' ';
     69	}
     70	if (i > 1)
     71		--dst;
     72
     73	*dst = 0;
     74}
     75
     76void __init prom_init(void)
     77{
     78	pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
     79}
     80
     81static struct pic32_sdhci_platform_data sdhci_data = {
     82	.setup_dma = pic32_set_sdhci_adma_fifo_threshold,
     83};
     84
     85static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
     86	OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
     87	{ /* sentinel */}
     88};
     89
     90static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
     91{
     92	struct device_node *root, *np;
     93	struct resource res;
     94
     95	root = of_find_node_by_path("/");
     96
     97	for (; lookup->compatible; lookup++) {
     98		np = of_find_compatible_node(NULL, NULL, lookup->compatible);
     99		if (np) {
    100			lookup->name = (char *)np->name;
    101			if (lookup->phys_addr) {
    102				of_node_put(np);
    103				continue;
    104			}
    105			if (!of_address_to_resource(np, 0, &res))
    106				lookup->phys_addr = res.start;
    107			of_node_put(np);
    108		}
    109	}
    110
    111	of_node_put(root);
    112
    113	return 0;
    114}
    115
    116static int __init plat_of_setup(void)
    117{
    118	if (!of_have_populated_dt())
    119		panic("Device tree not present");
    120
    121	pic32_of_prepare_platform_data(pic32_auxdata_lookup);
    122	if (of_platform_default_populate(NULL, pic32_auxdata_lookup, NULL))
    123		panic("Failed to populate DT");
    124
    125	return 0;
    126}
    127arch_initcall(plat_of_setup);