Import of Linux/MIPS 2.1.14

1 files changed, 126 insertions, 0 deletions

diff --git a/include/asm-ppc/processor.h b/include/asm-ppc/processor.h
new file mode 100644
index 000000000..e14f2b270
--- /dev/null
+++ b/include/asm-ppc/processor.h
@@ -0,0 +1,126 @@
+#ifndef __ASM_PPC_PROCESSOR_H
+#define __ASM_PPC_PROCESSOR_H
+
+/*
+ * PowerPC machine specifics
+ */
+
+#ifndef _PPC_MACHINE_H_
+#define _PPC_MACHINE_H_ 
+
+/* Bit encodings for Machine State Register (MSR) */
+#define MSR_POW		(1<<18)		/* Enable Power Management */
+#define MSR_TGPR	(1<<17)		/* TLB Update registers in use */
+#define MSR_ILE		(1<<16)		/* Interrupt Little-Endian enable */
+#define MSR_EE		(1<<15)		/* External Interrupt enable */
+#define MSR_PR		(1<<14)		/* Supervisor/User privilege */
+#define MSR_FP		(1<<13)		/* Floating Point enable */
+#define MSR_ME		(1<<12)		/* Machine Check enable */
+#define MSR_FE0		(1<<11)		/* Floating Exception mode 0 */
+#define MSR_SE		(1<<10)		/* Single Step */
+#define MSR_BE		(1<<9)		/* Branch Trace */
+#define MSR_FE1		(1<<8)		/* Floating Exception mode 1 */
+#define MSR_IP		(1<<6)		/* Exception prefix 0x000/0xFFF */
+#define MSR_IR		(1<<5)		/* Instruction MMU enable */
+#define MSR_DR		(1<<4)		/* Data MMU enable */
+#define MSR_RI		(1<<1)		/* Recoverable Exception */
+#define MSR_LE		(1<<0)		/* Little-Endian enable */
+
+#define MSR_		MSR_FP|MSR_FE0|MSR_FE1|MSR_ME
+#define MSR_USER	MSR_|MSR_PR|MSR_EE|MSR_IR|MSR_DR
+
+/* Bit encodings for Hardware Implementation Register (HID0) */
+#define HID0_EMCP	(1<<31)		/* Enable Machine Check pin */
+#define HID0_EBA	(1<<29)		/* Enable Bus Address Parity */
+#define HID0_EBD	(1<<28)		/* Enable Bus Data Parity */
+#define HID0_SBCLK	(1<<27)
+#define HID0_EICE	(1<<26)
+#define HID0_ECLK	(1<<25)
+#define HID0_PAR	(1<<24)
+#define HID0_DOZE	(1<<23)
+#define HID0_NAP	(1<<22)
+#define HID0_SLEEP	(1<<21)
+#define HID0_DPM	(1<<20)
+#define HID0_ICE	(1<<15)		/* Instruction Cache Enable */
+#define HID0_DCE	(1<<14)		/* Data Cache Enable */
+#define HID0_ILOCK	(1<<13)		/* Instruction Cache Lock */
+#define HID0_DLOCK	(1<<12)		/* Data Cache Lock */
+#define HID0_ICFI	(1<<11)		/* Instruction Cache Flash Invalidate */
+#define HID0_DCI	(1<<10)		/* Data Cache Invalidate */
+ 
+#endif
+
+static inline void start_thread(struct pt_regs * regs, unsigned long eip, unsigned long esp)
+{
+  regs->nip = eip;
+  regs->gpr[1] = esp;
+  regs->msr = MSR_USER;
+}
+
+
+/*
+ * Bus types
+ */
+#define EISA_bus 0
+#define EISA_bus__is_a_macro /* for versions in ksyms.c */
+#define MCA_bus 0
+#define MCA_bus__is_a_macro /* for versions in ksyms.c */
+
+/*
+ * Write Protection works right in supervisor mode on the PowerPC
+ */
+
+#define wp_works_ok 1
+#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
+
+/*
+ * User space process size: 2GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ *
+ * "this is gonna have to change to 1gig for the sparc" - David S. Miller
+ */
+#define TASK_SIZE	(0x80000000UL)
+
+struct thread_struct 
+   {
+   	unsigned long	ksp;		/* Kernel stack pointer */
+	unsigned long	*pg_tables;	/* MMU information */
+	unsigned long	segs[16];	/* MMU Segment registers */
+	unsigned long	last_pc;	/* PC when last entered system */
+	unsigned long	user_stack;	/* [User] Stack when entered kernel */
+	double		fpr[32];	/* Complete floating point set */
+	unsigned long	wchan;		/* Event task is sleeping on */
+	unsigned long	*regs;		/* Pointer to saved register state */
+   };
+
+#define INIT_TSS  { \
+	0, 0, {0}, \
+	0, 0, {0}, \
+}
+
+#define INIT_MMAP { &init_mm, 0, 0x40000000, \
+		      PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC }
+
+#define alloc_kernel_stack()    get_free_page(GFP_KERNEL)
+#define free_kernel_stack(page) free_page((page))
+
+/*
+ * Return saved PC of a blocked thread. For now, this is the "user" PC
+ */
+static inline unsigned long thread_saved_pc(struct thread_struct *t)
+{
+	return (t->last_pc);
+}
+
+/*
+ * Return_address is a replacement for __builtin_return_address(count)
+ * which on certain architectures cannot reasonably be implemented in GCC
+ * (MIPS, Alpha) or is unuseable with -fomit-frame-pointer (i386).
+ * Note that __builtin_return_address(x>=1) is forbidden because the GCC
+ * aborts compilation on some CPUs.  It's simply not possible to unwind
+ * some CPU's stackframes.
+ */
+#define return_address() __builtin_return_address(0)
+
+#endif
+