mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-30 16:13:18 +00:00
5761eaa3a5
Improve the debugging support of the PS3 bootwraper code: o Increase the size of the PS3 bootwrapper overlay from 256 to 512 bytes to allow for more debugging code in the overlay. o Use the dot symbol to set the size of __system_reset_overlay. The assembler will then emit an error if the overlay code is too big. o Remove some unused instructions. o Update the text describing the PS3 bootwrapper overlay. o Add a check for null pointer writes. o Change hcall return value from s64. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
/*
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* PS3 bootwrapper support.
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*
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* Copyright (C) 2007 Sony Computer Entertainment Inc.
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* Copyright 2007 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include "types.h"
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#include "elf.h"
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#include "string.h"
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#include "stdio.h"
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#include "page.h"
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#include "ops.h"
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extern int lv1_panic(u64 in_1);
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extern int lv1_get_logical_partition_id(u64 *out_1);
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extern int lv1_get_logical_ppe_id(u64 *out_1);
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extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
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u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);
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#ifdef DEBUG
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#define DBG(fmt...) printf(fmt)
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#else
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static inline int __attribute__ ((format (printf, 1, 2))) DBG(
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const char *fmt, ...) {return 0;}
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#endif
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BSS_STACK(4096);
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/* A buffer that may be edited by tools operating on a zImage binary so as to
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* edit the command line passed to vmlinux (by setting /chosen/bootargs).
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* The buffer is put in it's own section so that tools may locate it easier.
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*/
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static char cmdline[COMMAND_LINE_SIZE]
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__attribute__((__section__("__builtin_cmdline")));
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static void prep_cmdline(void *chosen)
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{
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if (cmdline[0] == '\0')
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getprop(chosen, "bootargs", cmdline, COMMAND_LINE_SIZE-1);
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else
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setprop_str(chosen, "bootargs", cmdline);
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printf("cmdline: '%s'\n", cmdline);
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}
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static void ps3_console_write(const char *buf, int len)
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{
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}
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static void ps3_exit(void)
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{
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printf("ps3_exit\n");
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/* lv1_panic will shutdown the lpar. */
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lv1_panic(0); /* zero = do not reboot */
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while (1);
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}
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static int ps3_repository_read_rm_size(u64 *rm_size)
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{
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int result;
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u64 lpar_id;
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u64 ppe_id;
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u64 v2;
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result = lv1_get_logical_partition_id(&lpar_id);
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if (result)
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return -1;
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result = lv1_get_logical_ppe_id(&ppe_id);
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if (result)
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return -1;
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/*
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* n1: 0000000062690000 : ....bi..
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* n2: 7075000000000000 : pu......
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* n3: 0000000000000001 : ........
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* n4: 726d5f73697a6500 : rm_size.
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*/
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result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
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0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
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&v2);
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printf("%s:%d: ppe_id %lu \n", __func__, __LINE__,
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(unsigned long)ppe_id);
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printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
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(unsigned long)lpar_id);
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printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
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return result ? -1 : 0;
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}
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void ps3_copy_vectors(void)
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{
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extern char __system_reset_kernel[];
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memcpy((void *)0x100, __system_reset_kernel, 512);
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flush_cache((void *)0x100, 512);
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}
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void platform_init(unsigned long null_check)
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{
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const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
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void *chosen;
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unsigned long ft_addr;
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u64 rm_size;
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unsigned long val;
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console_ops.write = ps3_console_write;
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platform_ops.exit = ps3_exit;
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printf("\n-- PS3 bootwrapper --\n");
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simple_alloc_init(_end, heapsize, 32, 64);
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fdt_init(_dtb_start);
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chosen = finddevice("/chosen");
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ps3_repository_read_rm_size(&rm_size);
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dt_fixup_memory(0, rm_size);
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if (_initrd_end > _initrd_start) {
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setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
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setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
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}
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prep_cmdline(chosen);
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ft_addr = dt_ops.finalize();
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ps3_copy_vectors();
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printf(" flat tree at 0x%lx\n\r", ft_addr);
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val = *(unsigned long *)0;
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if (val != null_check)
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printf("null check failed: %lx != %lx\n\r", val, null_check);
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((kernel_entry_t)0)(ft_addr, 0, NULL);
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ps3_exit();
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}
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