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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6dff5b6705
GCC 5 generates different code for this bootwrapper null check that causes the PS3 to hang very early in its bootup. This check is of limited value, so just get rid of it. Cc: stable@vger.kernel.org Signed-off-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
159 lines
3.8 KiB
C
159 lines
3.8 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[BOOT_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, BOOT_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(void)
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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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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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((kernel_entry_t)0)(ft_addr, 0, NULL);
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ps3_exit();
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}
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