patch-2.1.80 linux/include/asm-arm/proc-armo/assembler.h

• Lines: 89
• Date: Tue Jan 20 16:39:42 1998
• Orig file: v2.1.79/linux/include/asm-arm/proc-armo/assembler.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/asm-arm/proc-armo/assembler.h linux/include/asm-arm/proc-armo/assembler.h
@@ -0,0 +1,88 @@
+/*
+ * linux/asm-arm/proc-armo/assembler.h
+ *
+ * Copyright (C) 1996 Russell King
+ *
+ * This file contains arm architecture specific defines
+ * for the different processors
+ */
+
+/*
+ * LOADREGS: multiple register load (ldm) with pc in register list
+ *		(takes account of ARM6 not using ^)
+ *
+ * RETINSTR: return instruction: adds the 's' in at the end of the
+ *		instruction if this is not an ARM6
+ *
+ * SAVEIRQS: save IRQ state (not required on ARM2/ARM3 - done
+ *		implicitly
+ *
+ * RESTOREIRQS: restore IRQ state (not required on ARM2/ARM3 - done
+ *		implicitly with ldm ... ^ or movs.
+ *
+ * These next two need thinking about - can't easily use stack... (see system.S)
+ * DISABLEIRQS: disable IRQS in SVC mode
+ *
+ * ENABLEIRQS: enable IRQS in SVC mode
+ *
+ * USERMODE: switch to USER mode
+ *
+ * SVCMODE: switch to SVC mode
+ */
+
+#define N_BIT	(1 << 31)
+#define Z_BIT	(1 << 30)
+#define C_BIT	(1 << 29)
+#define V_BIT	(1 << 28)
+
+#define PCMASK	0xfc000003
+
+#ifdef __ASSEMBLER__
+
+#define I_BIT	(1 << 27)
+#define F_BIT	(1 << 26)
+
+#define MODE_USR	0
+#define MODE_FIQ	1
+#define MODE_IRQ	2
+#define MODE_SVC	3
+
+#define DEFAULT_FIQ	MODE_FIQ
+
+#define LOADREGS(cond, base, reglist...)\
+	ldm##cond	base,reglist^
+
+#define RETINSTR(instr, regs...)\
+	instr##s	regs
+
+#define MODENOP\
+	mov	r0, r0
+
+#define MODE(savereg,tmpreg,mode) \
+	mov	savereg, pc; \
+	bic	tmpreg, savereg, $0x0c000003; \
+	orr	tmpreg, tmpreg, $mode; \
+	teqp	tmpreg, $0
+
+#define RESTOREMODE(savereg) \
+	teqp	savereg, $0
+
+#define SAVEIRQS(tmpreg)
+
+#define RESTOREIRQS(tmpreg)
+
+#define DISABLEIRQS(tmpreg)\
+	teqp	pc, $0x08000003
+
+#define ENABLEIRQS(tmpreg)\
+	teqp	pc, $0x00000003
+
+#define USERMODE(tmpreg)\
+	teqp	pc, $0x00000000;\
+	mov	r0, r0
+
+#define SVCMODE(tmpreg)\
+	teqp	pc, $0x00000003;\
+	mov	r0, r0
+
+#endif