linux-arch.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Guo Ren <ren_guo@c-sky.com>
To: akpm@linux-foundation.org, arnd@arndb.de,
	daniel.lezcano@linaro.org, davem@davemloft.net,
	gregkh@linuxfoundation.org, jason@lakedaemon.net,
	marc.zyngier@arm.com, mark.rutland@arm.com,
	mchehab+samsung@kernel.org, peterz@infradead.org,
	robh@kernel.org, robh+dt@kernel.org, tglx@linutronix.de
Cc: green.hu@gmail.com, linux-kernel@vger.kernel.org,
	linux-arch@vger.kernel.org, devicetree@vger.kernel.org,
	c-sky_gcc_upstream@c-sky.com, Guo Ren <ren_guo@c-sky.com>
Subject: [PATCH V7 05/20] csky: System Call
Date: Fri,  5 Oct 2018 13:41:47 +0800	[thread overview]
Message-ID: <36464adeb406b0e3110eb76ecbd644743e819d61.1538715563.git.ren_guo@c-sky.com> (raw)
In-Reply-To: <cover.1538715563.git.ren_guo@c-sky.com>
In-Reply-To: <cover.1538715563.git.ren_guo@c-sky.com>

This patch adds files related to syscall.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---
 arch/csky/include/asm/syscall.h     | 71 +++++++++++++++++++++++++++++++++++++
 arch/csky/include/asm/syscalls.h    | 15 ++++++++
 arch/csky/include/uapi/asm/unistd.h | 10 ++++++
 arch/csky/kernel/syscall.c          | 43 ++++++++++++++++++++++
 arch/csky/kernel/syscall_table.c    | 14 ++++++++
 5 files changed, 153 insertions(+)
 create mode 100644 arch/csky/include/asm/syscall.h
 create mode 100644 arch/csky/include/asm/syscalls.h
 create mode 100644 arch/csky/include/uapi/asm/unistd.h
 create mode 100644 arch/csky/kernel/syscall.c
 create mode 100644 arch/csky/kernel/syscall_table.c

diff --git a/arch/csky/include/asm/syscall.h b/arch/csky/include/asm/syscall.h
new file mode 100644
index 0000000..926a64a
--- /dev/null
+++ b/arch/csky/include/asm/syscall.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_SYSCALL_H
+#define __ASM_SYSCALL_H
+
+#include <linux/sched.h>
+#include <linux/err.h>
+#include <abi/regdef.h>
+
+static inline int
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
+{
+	return regs_syscallid(regs);
+}
+
+static inline void
+syscall_rollback(struct task_struct *task, struct pt_regs *regs)
+{
+	regs->a0 = regs->orig_a0;
+}
+
+static inline long
+syscall_get_error(struct task_struct *task, struct pt_regs *regs)
+{
+	unsigned long error = regs->a0;
+
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
+{
+	return regs->a0;
+}
+
+static inline void
+syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
+		int error, long val)
+{
+	regs->a0 = (long) error ?: val;
+}
+
+static inline void
+syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
+		      unsigned int i, unsigned int n, unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+	if (i == 0) {
+		args[0] = regs->orig_a0;
+		args++;
+		i++;
+		n--;
+	}
+	memcpy(args, &regs->a1 + i * sizeof(regs->a1), n * sizeof(args[0]));
+}
+
+static inline void
+syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
+		      unsigned int i, unsigned int n, const unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+	if (i == 0) {
+		regs->orig_a0 = args[0];
+		args++;
+		i++;
+		n--;
+	}
+	memcpy(&regs->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
+}
+
+#endif	/* __ASM_SYSCALL_H */
diff --git a/arch/csky/include/asm/syscalls.h b/arch/csky/include/asm/syscalls.h
new file mode 100644
index 0000000..5d48e5e
--- /dev/null
+++ b/arch/csky/include/asm/syscalls.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef __ASM_CSKY_SYSCALLS_H
+#define __ASM_CSKY_SYSCALLS_H
+
+#include <asm-generic/syscalls.h>
+
+long sys_cacheflush(void __user *, unsigned long, int);
+
+long sys_set_thread_area(unsigned long addr);
+
+long sys_csky_fadvise64_64(int fd, int advice, loff_t offset, loff_t len);
+
+#endif /* __ASM_CSKY_SYSCALLS_H */
diff --git a/arch/csky/include/uapi/asm/unistd.h b/arch/csky/include/uapi/asm/unistd.h
new file mode 100644
index 0000000..16ed71e
--- /dev/null
+++ b/arch/csky/include/uapi/asm/unistd.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#define __ARCH_WANT_SYS_CLONE
+#include <asm-generic/unistd.h>
+
+#define __NR_set_thread_area	(__NR_arch_specific_syscall + 0)
+__SYSCALL(__NR_set_thread_area, sys_set_thread_area)
+#define __NR_cacheflush		(__NR_arch_specific_syscall + 4)
+__SYSCALL(__NR_cacheflush, sys_cacheflush)
diff --git a/arch/csky/kernel/syscall.c b/arch/csky/kernel/syscall.c
new file mode 100644
index 0000000..3d30e58
--- /dev/null
+++ b/arch/csky/kernel/syscall.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#include <linux/syscalls.h>
+
+SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
+{
+	struct thread_info *ti = task_thread_info(current);
+	struct pt_regs *reg = current_pt_regs();
+
+	reg->tls = addr;
+	ti->tp_value = addr;
+
+	return 0;
+}
+
+SYSCALL_DEFINE6(mmap2,
+	unsigned long, addr,
+	unsigned long, len,
+	unsigned long, prot,
+	unsigned long, flags,
+	unsigned long, fd,
+	off_t, offset)
+{
+	if (unlikely(offset & (~PAGE_MASK >> 12)))
+		return -EINVAL;
+
+	return ksys_mmap_pgoff(addr, len, prot, flags, fd,
+			       offset >> (PAGE_SHIFT - 12));
+}
+
+/*
+ * for abiv1 the 64bits args should be even th, So we need mov the advice
+ * forward.
+ */
+SYSCALL_DEFINE4(csky_fadvise64_64,
+	int, fd,
+	int, advice,
+	loff_t, offset,
+	loff_t, len)
+{
+	return ksys_fadvise64_64(fd, offset, len, advice);
+}
diff --git a/arch/csky/kernel/syscall_table.c b/arch/csky/kernel/syscall_table.c
new file mode 100644
index 0000000..a0c238c
--- /dev/null
+++ b/arch/csky/kernel/syscall_table.c
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#include <linux/syscalls.h>
+#include <asm/syscalls.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call)[nr] = (call),
+
+#define sys_fadvise64_64 sys_csky_fadvise64_64
+void * const sys_call_table[__NR_syscalls] __page_aligned_data = {
+	[0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
-- 
2.7.4

  parent reply	other threads:[~2018-10-05  5:41 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-05  5:41 [PATCH V7 00/20] C-SKY(csky) Linux Kernel Port Guo Ren
2018-10-05  5:41 ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 01/20] csky: Build infrastructure Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 02/20] csky: defconfig Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 03/20] csky: Kernel booting Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 04/20] csky: Exception handling and mm-fault Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` Guo Ren [this message]
2018-10-05  5:41   ` [PATCH V7 05/20] csky: System Call Guo Ren
2018-10-05  5:41 ` [PATCH V7 06/20] csky: Cache and TLB routines Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 07/20] csky: MMU and page table management Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 08/20] csky: Process management and Signal Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 09/20] csky: VDSO and rt_sigreturn Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 10/20] csky: IRQ handling Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 11/20] csky: Atomic operations Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 12/20] csky: ELF and module probe Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 13/20] csky: Library functions Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 14/20] csky: User access Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 15/20] csky: Debug and Ptrace GDB Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 16/20] csky: SMP support Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  5:41 ` [PATCH V7 17/20] csky: Misc headers Guo Ren
2018-10-05  5:41   ` Guo Ren
2018-10-05  8:33 ` [PATCH V7 18/20] dt-bindings: csky CPU Bindings Guo Ren
2018-10-05  8:33   ` Guo Ren
2018-10-05  8:33 ` [PATCH V7 19/20] dt-bindings: Add vendor prefix for csky Guo Ren
2018-10-05  8:33   ` Guo Ren
2018-10-05  8:33 ` [PATCH V7 20/20] MAINTAINERS: Add csky Guo Ren
2018-10-05  8:33   ` Guo Ren
2018-10-06 20:06 ` [PATCH V7 00/20] C-SKY(csky) Linux Kernel Port Eugene Syromiatnikov
2018-10-06 20:06   ` Eugene Syromiatnikov
2018-10-07  4:48   ` Guo Ren
2018-10-07  4:48     ` Guo Ren
2018-10-07  5:44     ` Eugene Syromiatnikov
2018-10-07  5:44       ` Eugene Syromiatnikov
2018-10-07 10:41 ` Guo Ren
2018-10-07 10:41   ` Guo Ren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=36464adeb406b0e3110eb76ecbd644743e819d61.1538715563.git.ren_guo@c-sky.com \
    --to=ren_guo@c-sky.com \
    --cc=akpm@linux-foundation.org \
    --cc=arnd@arndb.de \
    --cc=c-sky_gcc_upstream@c-sky.com \
    --cc=daniel.lezcano@linaro.org \
    --cc=davem@davemloft.net \
    --cc=devicetree@vger.kernel.org \
    --cc=green.hu@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=jason@lakedaemon.net \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=mark.rutland@arm.com \
    --cc=mchehab+samsung@kernel.org \
    --cc=peterz@infradead.org \
    --cc=robh+dt@kernel.org \
    --cc=robh@kernel.org \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).