patch-2.4.0-test7 linux/arch/arm/kernel/head-armo.S

• Lines: 115
• Date: Sun Aug 13 09:54:15 2000
• Orig file: v2.4.0-test6/linux/arch/arm/kernel/head-armo.S
• Orig date: Fri Oct 22 13:21:44 1999

diff -u --recursive --new-file v2.4.0-test6/linux/arch/arm/kernel/head-armo.S linux/arch/arm/kernel/head-armo.S
@@ -1,11 +1,13 @@
 /*
  * linux/arch/arm/kernel/head-armo.S
  *
- * Copyright (C) 1994, 1995, 1996, 1997 Russell King
+ * Copyright (C) 1994-2000 Russell King
  *
  * 26-bit kernel startup code
  */
+#include <linux/config.h>
 #include <linux/linkage.h>
+#include <asm/mach-types.h>
 
 		.globl	SYMBOL_NAME(swapper_pg_dir)
 		.equ	SYMBOL_NAME(swapper_pg_dir),	0x0207d000
@@ -17,46 +19,69 @@
 ENTRY(stext)
 ENTRY(_stext)
 __entry:	cmp	pc, #0x02000000
-		ldrlt	pc, LC1			@ if 0x01800000, call at 0x02080000
+		ldrlt	pc, LC0			@ if 0x01800000, call at 0x02080000
 		teq	r0, #0			@ Check for old calling method
-		blne	Loldparams		@ Move page if old
-		adr	r5, LC0
-		ldmia	r5, {r5, r6, sl, sp}	@ Setup stack
-		mov	r4, #0
-1:		cmp	r5, sl			@ Clear BSS
-		strcc	r4, [r5], #4
+		blne	oldparams		@ Move page if old
+		adr	r0, LC0
+		ldmib	r0, {r2-r5, sp}		@ Setup stack
+		mov	r0, #0
+1:		cmp	r2, r3			@ Clear BSS
+		strcc	r0, [r2], #4
 		bcc	1b
-		mov	r0, #0xea000000		@ Point undef instr to continuation
-		adr	r5, Lcontinue - 12
-		orr	r5, r0, r5, lsr #2
-		str	r5, [r4, #4]
-		mov	r2, r4
-		ldr	r5, Larm2_id
-		swp	r0, r0, [r2]		@ check for swp (ARM2 can't)
-		ldr	r5, Larm250_id
-		mrc	15, 0, r0, c0, c0	@ check for CP#15 (ARM250 can't)
-		mov	r5, r0			@ Use processor ID if we do have CP#15
-Lcontinue:	str	r5, [r6]
-		mov	r5, #0xeb000000		@ Point undef instr vector to itself
-		sub	r5, r5, #2
-		str	r5, [r4, #4]
+
+		bl	detect_proc_type
+		str	r0, [r4]
+		bl	detect_arch_type
+		str	r0, [r5]
+
 		mov	fp, #0
 		b	SYMBOL_NAME(start_kernel)
 
-LC1:		.word	SYMBOL_NAME(_stext)
-LC0:		.word	SYMBOL_NAME(__bss_start)
-		.word	SYMBOL_NAME(processor_id)
-		.word	SYMBOL_NAME(_end)
-		.word	SYMBOL_NAME(init_task_union)+8192
-Larm2_id:	.long	0x41560200
-Larm250_id:	.long	0x41560250
+LC0:		.word	SYMBOL_NAME(_stext)
+		.word	SYMBOL_NAME(__bss_start)		@ r2
+		.word	SYMBOL_NAME(_end)			@ r3
+		.word	SYMBOL_NAME(processor_id)		@ r4
+		.word	SYMBOL_NAME(__machine_arch_type)	@ r5
+		.word	SYMBOL_NAME(init_task_union)+8192	@ sp
+arm2_id:	.long	0x41560200
+arm250_id:	.long	0x41560250
 		.align
 
-Loldparams:	mov	r4, #0x02000000
+oldparams:	mov	r4, #0x02000000
 		add	r3, r4, #0x00080000
 		add	r4, r4, #0x0007c000
 1:		ldmia	r0!, {r5 - r12}
 		stmia	r4!, {r5 - r12}
 		cmp	r4, r3
 		blt	1b
-		movs	pc, lr
+		mov	pc, lr
+
+/*
+ * We need some way to automatically detect the difference between
+ * these two machines.  Unfortunately, it is not possible to detect
+ * the presence of the SuperIO chip, because that will hang the old
+ * Archimedes machines solid.
+ */
+/* DAG: Outdated, these have been combined !!!!!!! */
+detect_arch_type:
+#if defined(CONFIG_ARCH_ARC)
+		mov	r0, #MACH_TYPE_ARCHIMEDES
+#elif defined(CONFIG_ARCH_A5K)
+		mov	r0, #MACH_TYPE_A5K
+#endif
+		mov	pc, lr
+
+detect_proc_type:
+		mov	r2, #0xea000000		@ Point undef instr to continuation
+		adr	r0, continue - 12
+		orr	r0, r2, r0, lsr #2
+		mov	r1, #0
+		str	r0, [r1, #4]
+		ldr	r0, arm2_id
+		swp	r2, r2, [r1]		@ check for swp (ARM2 can't)
+		ldr	r0, arm250_id
+		mrc	15, 0, r0, c0, c0	@ check for CP#15 (ARM250 can't)
+continue:	mov	r2, #0xeb000000		@ Make undef vector loop
+		sub	r2, r2, #2
+		str	r2, [r1, #4]
+		mov	pc, lr