add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/powerpc/kernel/head_64.S
..
..
@@ -1,3 +1,4 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
1
2
 /*
2
3
  *  PowerPC version
3
4
  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
..
..
@@ -15,11 +16,6 @@
15
16
  *  This file contains the entry point for the 64-bit kernel along
16
17
  *  with some early initialization code common to all 64-bit powerpc
17
18
  *  variants.
18
- *
19
- *  This program is free software; you can redistribute it and/or
20
- *  modify it under the terms of the GNU General Public License
21
- *  as published by the Free Software Foundation; either version
22
- *  2 of the License, or (at your option) any later version.
23
19
  */
24
20
 
25
21
 #include <linux/threads.h>
..
..
@@ -186,7 +182,8 @@
186
182
 	isync
187
183
 	bctr
188
184
 #else
189
-	BUG_OPCODE
185
+0:	trap
186
+	EMIT_BUG_ENTRY 0b, __FILE__, __LINE__, 0
190
187
 #endif
191
188
 CLOSE_FIXED_SECTION(first_256B)
192
189
 
..
..
@@ -303,9 +300,6 @@
303
300
 	rlwimi	r3, r3, 30, 2, 30
304
301
 	mtspr	SPRN_PIR, r3
305
302
 1:
306
-#endif
307
-
308
-_GLOBAL(generic_secondary_thread_init)
309
303
 	mr	r24,r3
310
304
 
311
305
 	/* turn on 64-bit mode */
..
..
@@ -315,12 +309,12 @@
315
309
 	bl	relative_toc
316
310
 	tovirt(r2,r2)
317
311
 
318
-#ifdef CONFIG_PPC_BOOK3E
319
312
 	/* Book3E initialization */
320
313
 	mr	r3,r24
321
314
 	bl	book3e_secondary_thread_init
322
-#endif
323
315
 	b	generic_secondary_common_init
316
+
317
+#endif /* CONFIG_PPC_BOOK3E */
324
318
 
325
319
 /*
326
320
  * On pSeries and most other platforms, secondary processors spin
..
..
@@ -540,6 +534,7 @@
540
534
 	b	__after_prom_start
541
535
 #endif /* CONFIG_PPC_BOOK3E */
542
536
 
537
+__REF
543
538
 __boot_from_prom:
544
539
 #ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
545
540
 	/* Save parameters */
..
..
@@ -577,6 +572,7 @@
577
572
 	/* We never return. We also hit that trap if trying to boot
578
573
 	 * from OF while CONFIG_PPC_OF_BOOT_TRAMPOLINE isn't selected */
579
574
 	trap
575
+	.previous
580
576
 
581
577
 __after_prom_start:
582
578
 #ifdef CONFIG_RELOCATABLE
..
..
@@ -639,7 +635,7 @@
639
635
 	sub	r5,r5,r11
640
636
 #else
641
637
 	/* just copy interrupts */
642
-	LOAD_REG_IMMEDIATE(r5, FIXED_SYMBOL_ABS_ADDR(__end_interrupts))
638
+	LOAD_REG_IMMEDIATE_SYM(r5, r11, FIXED_SYMBOL_ABS_ADDR(__end_interrupts))
643
639
 #endif
644
640
 	b	5f
645
641
 3:
..
..
@@ -801,21 +797,19 @@
801
797
 	/* Set thread priority to MEDIUM */
802
798
 	HMT_MEDIUM
803
799
 
804
-	/* Initialize the kernel stack */
805
-	LOAD_REG_ADDR(r3, current_set)
806
-	sldi	r28,r24,3		/* get current_set[cpu#]	 */
807
-	ldx	r14,r3,r28
808
-	addi	r14,r14,THREAD_SIZE-STACK_FRAME_OVERHEAD
809
-	std	r14,PACAKSAVE(r13)
810
-
811
-	/* Do early setup for that CPU (SLB and hash table pointer) */
800
+	/*
801
+	 * Do early setup for this CPU, in particular initialising the MMU so we
802
+	 * can turn it on below. This is a call to C, which is OK, we're still
803
+	 * running on the emergency stack.
804
+	 */
812
805
 	bl	early_setup_secondary
813
806
 
814
807
 	/*
815
-	 * setup the new stack pointer, but *don't* use this until
816
-	 * translation is on.
808
+	 * The primary has initialized our kernel stack for us in the paca, grab
809
+	 * it and put it in r1. We must *not* use it until we turn on the MMU
810
+	 * below, because it may not be inside the RMO.
817
811
 	 */
818
-	mr	r1, r14
812
+	ld	r1, PACAKSAVE(r13)
819
813
 
820
814
 	/* Clear backchain so we get nice backtraces */
821
815
 	li	r7,0
..
..
@@ -975,7 +969,6 @@
975
969
 	RFI
976
970
 	b	.	/* prevent speculative execution */
977
971
 
978
-	.previous
979
972
 	/* This is where all platforms converge execution */
980
973
 
981
974
 start_here_common:
..
..
@@ -997,7 +990,9 @@
997
990
 	bl	start_kernel
998
991
 
999
992
 	/* Not reached */
1000
-	BUG_OPCODE
993
+0:	trap
994
+	EMIT_BUG_ENTRY 0b, __FILE__, __LINE__, 0
995
+	.previous
1001
996
 
1002
997
 /*
1003
998
  * We put a few things here that have to be page-aligned.