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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/h8300/include/asm/processor.h
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/h8300/include/asm/processor.h')
-rw-r--r--kernel/arch/h8300/include/asm/processor.h144
1 files changed, 144 insertions, 0 deletions
diff --git a/kernel/arch/h8300/include/asm/processor.h b/kernel/arch/h8300/include/asm/processor.h
new file mode 100644
index 000000000..54e3fd83c
--- /dev/null
+++ b/kernel/arch/h8300/include/asm/processor.h
@@ -0,0 +1,144 @@
+/*
+ * include/asm-h8300/processor.h
+ *
+ * Copyright (C) 2002 Yoshinori Sato
+ *
+ * Based on: linux/asm-m68nommu/processor.h
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#ifndef __ASM_H8300_PROCESSOR_H
+#define __ASM_H8300_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l; })
+
+#include <linux/compiler.h>
+#include <asm/segment.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+
+static inline unsigned long rdusp(void)
+{
+ extern unsigned int _sw_usp;
+
+ return _sw_usp;
+}
+
+static inline void wrusp(unsigned long usp)
+{
+ extern unsigned int _sw_usp;
+
+ _sw_usp = usp;
+}
+
+/*
+ * User space process size: 3.75GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+#define TASK_SIZE (0xFFFFFFFFUL)
+
+#ifdef __KERNEL__
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
+#endif
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's. We won't be using it
+ */
+#define TASK_UNMAPPED_BASE 0
+
+struct thread_struct {
+ unsigned long ksp; /* kernel stack pointer */
+ unsigned long usp; /* user stack pointer */
+ unsigned long ccr; /* saved status register */
+ unsigned long esp0; /* points to SR of stack frame */
+ struct {
+ unsigned short *addr;
+ unsigned short inst;
+ } breakinfo;
+};
+
+#define INIT_THREAD { \
+ .ksp = sizeof(init_stack) + (unsigned long)init_stack, \
+ .usp = 0, \
+ .ccr = PS_S, \
+ .esp0 = 0, \
+ .breakinfo = { \
+ .addr = (unsigned short *)-1, \
+ .inst = 0 \
+ } \
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ *
+ * pass the data segment into user programs if it exists,
+ * it can't hurt anything as far as I can tell
+ */
+#if defined(CONFIG_CPU_H8300H)
+#define start_thread(_regs, _pc, _usp) \
+do { \
+ (_regs)->pc = (_pc); \
+ (_regs)->ccr = 0x00; /* clear all flags */ \
+ (_regs)->er5 = current->mm->start_data; /* GOT base */ \
+ (_regs)->sp = ((unsigned long)(_usp)) - sizeof(unsigned long) * 3; \
+} while (0)
+#endif
+#if defined(CONFIG_CPU_H8S)
+#define start_thread(_regs, _pc, _usp) \
+do { \
+ (_regs)->pc = (_pc); \
+ (_regs)->ccr = 0x00; /* clear kernel flag */ \
+ (_regs)->exr = 0x78; /* enable all interrupts */ \
+ (_regs)->er5 = current->mm->start_data; /* GOT base */ \
+ /* 14 = space for retaddr(4), vector(4), er0(4) and exr(2) on stack */ \
+ (_regs)->sp = ((unsigned long)(_usp)) - 14; \
+} while (0)
+#endif
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+unsigned long thread_saved_pc(struct task_struct *tsk);
+unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk) \
+ ({ \
+ unsigned long eip = 0; \
+ if ((tsk)->thread.esp0 > PAGE_SIZE && \
+ MAP_NR((tsk)->thread.esp0) < max_mapnr) \
+ eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+ eip; })
+
+#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
+
+#define cpu_relax() barrier()
+#define cpu_relax_lowlatency() cpu_relax()
+
+#define HARD_RESET_NOW() ({ \
+ local_irq_disable(); \
+ asm("jmp @@0"); \
+})
+
+#endif