summaryrefslogtreecommitdiffstats
path: root/arch/csky/abiv2/inc
diff options
context:
space:
mode:
authorGuo Ren <ren_guo@c-sky.com>2018-09-05 14:25:14 +0800
committerGuo Ren <ren_guo@c-sky.com>2018-10-26 00:54:13 +0800
commite9564df753fd547fcbcd4fd10015c3b1213ef452 (patch)
tree067236e1b2b5812db80e3ba1ea94b0e2a737a28f /arch/csky/abiv2/inc
parent013de2d6671d89de3397904749c86a69ac0686f7 (diff)
downloadlinux-e9564df753fd547fcbcd4fd10015c3b1213ef452.tar.bz2
csky: Process management and Signal
This patch adds files related to task_switch, sigcontext, signal, fpu context switch. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'arch/csky/abiv2/inc')
-rw-r--r--arch/csky/abiv2/inc/abi/fpu.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/csky/abiv2/inc/abi/fpu.h b/arch/csky/abiv2/inc/abi/fpu.h
new file mode 100644
index 000000000000..22ca3cf2794a
--- /dev/null
+++ b/arch/csky/abiv2/inc/abi/fpu.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef __ASM_CSKY_FPU_H
+#define __ASM_CSKY_FPU_H
+
+#include <asm/sigcontext.h>
+#include <asm/ptrace.h>
+
+int fpu_libc_helper(struct pt_regs *regs);
+void fpu_fpe(struct pt_regs *regs);
+void __init init_fpu(void);
+
+void save_to_user_fp(struct user_fp *user_fp);
+void restore_from_user_fp(struct user_fp *user_fp);
+
+/*
+ * Define the fesr bit for fpe handle.
+ */
+#define FPE_ILLE (1 << 16) /* Illegal instruction */
+#define FPE_FEC (1 << 7) /* Input float-point arithmetic exception */
+#define FPE_IDC (1 << 5) /* Input denormalized exception */
+#define FPE_IXC (1 << 4) /* Inexact exception */
+#define FPE_UFC (1 << 3) /* Underflow exception */
+#define FPE_OFC (1 << 2) /* Overflow exception */
+#define FPE_DZC (1 << 1) /* Divide by zero exception */
+#define FPE_IOC (1 << 0) /* Invalid operation exception */
+#define FPE_REGULAR_EXCEPTION (FPE_IXC | FPE_UFC | FPE_OFC | FPE_DZC | FPE_IOC)
+
+#ifdef CONFIG_OPEN_FPU_IDE
+#define IDE_STAT (1 << 5)
+#else
+#define IDE_STAT 0
+#endif
+
+#ifdef CONFIG_OPEN_FPU_IXE
+#define IXE_STAT (1 << 4)
+#else
+#define IXE_STAT 0
+#endif
+
+#ifdef CONFIG_OPEN_FPU_UFE
+#define UFE_STAT (1 << 3)
+#else
+#define UFE_STAT 0
+#endif
+
+#ifdef CONFIG_OPEN_FPU_OFE
+#define OFE_STAT (1 << 2)
+#else
+#define OFE_STAT 0
+#endif
+
+#ifdef CONFIG_OPEN_FPU_DZE
+#define DZE_STAT (1 << 1)
+#else
+#define DZE_STAT 0
+#endif
+
+#ifdef CONFIG_OPEN_FPU_IOE
+#define IOE_STAT (1 << 0)
+#else
+#define IOE_STAT 0
+#endif
+
+#endif /* __ASM_CSKY_FPU_H */