cregit-Linux how code gets into the kernel

Release 4.14 arch/powerpc/boot/ps3.c

/*
 *  PS3 bootwrapper support.
 *
 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
 *  Copyright 2007 Sony Corp.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "elf.h"
#include "string.h"
#include "stdio.h"
#include "page.h"
#include "ops.h"

extern int lv1_panic(u64 in_1);
extern int lv1_get_logical_partition_id(u64 *out_1);
extern int lv1_get_logical_ppe_id(u64 *out_1);
extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
	u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);

#ifdef DEBUG

#define DBG(fmt...) printf(fmt)
#else

static inline int __attribute__ ((format (printf, 1, 2))) DBG(
	const char *fmt, ...) {return 0;}
#endif

BSS_STACK(4096);

/* A buffer that may be edited by tools operating on a zImage binary so as to
 * edit the command line passed to vmlinux (by setting /chosen/bootargs).
 * The buffer is put in it's own section so that tools may locate it easier.
 */


static char cmdline[BOOT_COMMAND_LINE_SIZE]
	__attribute__((__section__("__builtin_cmdline")));


static void prep_cmdline(void *chosen) { if (cmdline[0] == '\0') getprop(chosen, "bootargs", cmdline, BOOT_COMMAND_LINE_SIZE-1); else setprop_str(chosen, "bootargs", cmdline); printf("cmdline: '%s'\n", cmdline); }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand4897.96%150.00%
Anton Blanchard12.04%150.00%
Total49100.00%2100.00%


static void ps3_console_write(const char *buf, int len) { }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand13100.00%1100.00%
Total13100.00%1100.00%


static void ps3_exit(void) { printf("ps3_exit\n"); /* lv1_panic will shutdown the lpar. */ lv1_panic(0); /* zero = do not reboot */ while (1); }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand25100.00%1100.00%
Total25100.00%1100.00%


static int ps3_repository_read_rm_size(u64 *rm_size) { int result; u64 lpar_id; u64 ppe_id; u64 v2; result = lv1_get_logical_partition_id(&lpar_id); if (result) return -1; result = lv1_get_logical_ppe_id(&ppe_id); if (result) return -1; /* * n1: 0000000062690000 : ....bi.. * n2: 7075000000000000 : pu...... * n3: 0000000000000001 : ........ * n4: 726d5f73697a6500 : rm_size. */ result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL, 0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size, &v2); printf("%s:%d: ppe_id %lu \n", __func__, __LINE__, (unsigned long)ppe_id); printf("%s:%d: lpar_id %lu \n", __func__, __LINE__, (unsigned long)lpar_id); printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size); return result ? -1 : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand125100.00%2100.00%
Total125100.00%2100.00%


void ps3_copy_vectors(void) { extern char __system_reset_kernel[]; memcpy((void *)0x100, __system_reset_kernel, 512); flush_cache((void *)0x100, 512); }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand36100.00%2100.00%
Total36100.00%2100.00%


void platform_init(void) { const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */ void *chosen; unsigned long ft_addr; u64 rm_size; console_ops.write = ps3_console_write; platform_ops.exit = ps3_exit; printf("\n-- PS3 bootwrapper --\n"); simple_alloc_init(_end, heapsize, 32, 64); fdt_init(_dtb_start); chosen = finddevice("/chosen"); ps3_repository_read_rm_size(&rm_size); dt_fixup_memory(0, rm_size); if (_initrd_end > _initrd_start) { setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start)); setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end)); } prep_cmdline(chosen); ft_addr = dt_ops.finalize(); ps3_copy_vectors(); printf(" flat tree at 0x%lx\n\r", ft_addr); ((kernel_entry_t)0)(ft_addr, 0, NULL); ps3_exit(); }

Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand15799.37%266.67%
David Gibson10.63%133.33%
Total158100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Geoff Levand54999.46%360.00%
Anton Blanchard20.36%120.00%
David Gibson10.18%120.00%
Total552100.00%5100.00%
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