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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ps3.c (3091B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  PS3 bootwrapper support.
      4 *
      5 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
      6 *  Copyright 2007 Sony Corp.
      7 */
      8
      9#include <stdarg.h>
     10#include <stddef.h>
     11#include "types.h"
     12#include "elf.h"
     13#include "string.h"
     14#include "stdio.h"
     15#include "page.h"
     16#include "ops.h"
     17
     18extern int lv1_panic(u64 in_1);
     19extern int lv1_get_logical_partition_id(u64 *out_1);
     20extern int lv1_get_logical_ppe_id(u64 *out_1);
     21extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
     22	u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);
     23
     24BSS_STACK(4096);
     25
     26/* A buffer that may be edited by tools operating on a zImage binary so as to
     27 * edit the command line passed to vmlinux (by setting /chosen/bootargs).
     28 * The buffer is put in it's own section so that tools may locate it easier.
     29 */
     30
     31static char cmdline[BOOT_COMMAND_LINE_SIZE]
     32	__attribute__((__section__("__builtin_cmdline")));
     33
     34static void prep_cmdline(void *chosen)
     35{
     36	if (cmdline[0] == '\0')
     37		getprop(chosen, "bootargs", cmdline, BOOT_COMMAND_LINE_SIZE-1);
     38	else
     39		setprop_str(chosen, "bootargs", cmdline);
     40
     41	printf("cmdline: '%s'\n", cmdline);
     42}
     43
     44static void ps3_console_write(const char *buf, int len)
     45{
     46}
     47
     48static void ps3_exit(void)
     49{
     50	printf("ps3_exit\n");
     51
     52	/* lv1_panic will shutdown the lpar. */
     53
     54	lv1_panic(0); /* zero = do not reboot */
     55	while (1);
     56}
     57
     58static int ps3_repository_read_rm_size(u64 *rm_size)
     59{
     60	int result;
     61	u64 lpar_id;
     62	u64 ppe_id;
     63	u64 v2;
     64
     65	result = lv1_get_logical_partition_id(&lpar_id);
     66
     67	if (result)
     68		return -1;
     69
     70	result = lv1_get_logical_ppe_id(&ppe_id);
     71
     72	if (result)
     73		return -1;
     74
     75	/*
     76	 * n1: 0000000062690000 : ....bi..
     77	 * n2: 7075000000000000 : pu......
     78	 * n3: 0000000000000001 : ........
     79	 * n4: 726d5f73697a6500 : rm_size.
     80	*/
     81
     82	result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
     83		0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
     84		&v2);
     85
     86	printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
     87		(unsigned long)ppe_id);
     88	printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
     89		(unsigned long)lpar_id);
     90	printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
     91
     92	return result ? -1 : 0;
     93}
     94
     95void ps3_copy_vectors(void)
     96{
     97	extern char __system_reset_kernel[];
     98
     99	memcpy((void *)0x100, __system_reset_kernel, 512);
    100	flush_cache((void *)0x100, 512);
    101}
    102
    103void platform_init(void)
    104{
    105	const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
    106	void *chosen;
    107	unsigned long ft_addr;
    108	u64 rm_size;
    109
    110	console_ops.write = ps3_console_write;
    111	platform_ops.exit = ps3_exit;
    112
    113	printf("\n-- PS3 bootwrapper --\n");
    114
    115	simple_alloc_init(_end, heapsize, 32, 64);
    116	fdt_init(_dtb_start);
    117
    118	chosen = finddevice("/chosen");
    119
    120	ps3_repository_read_rm_size(&rm_size);
    121	dt_fixup_memory(0, rm_size);
    122
    123	if (&_initrd_end > &_initrd_start) {
    124		setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
    125		setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
    126	}
    127
    128	prep_cmdline(chosen);
    129
    130	ft_addr = dt_ops.finalize();
    131
    132	ps3_copy_vectors();
    133
    134	printf(" flat tree at 0x%lx\n\r", ft_addr);
    135
    136	((kernel_entry_t)0)(ft_addr, 0, NULL);
    137
    138	ps3_exit();
    139}