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Added mutex_control syscall for userspace mutexes.

Browse Source 
- Compiles and Codezero runs as normal without touching mutex implementation
- Mutex implementation needs testing.

The mutex control syscall allows userspace programs to declare any virtual
address as a mutex lock and ask for help from the kernel syscall
for resolving locking contentions.
This commit is contained in:
Bahadir Balban
2009-05-29 15:34:04 +03:00
parent ab9e036cb7
commit b11d4c4607
16 changed files with 433 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/l4/api/kip.h
View File

@@ -62,11 +62,11 @@ struct kip {
u32 thread_switch;
u32 schedule;
u32 getid;
u32 mutex_control;
u32 arch_syscall0;
u32 arch_syscall1;
u32 arch_syscall2;
u32 arch_syscall3;
u32 utcb;

14
include/l4/api/mutex.h Normal file
View File

@@ -0,0 +1,14 @@
#ifndef __MUTEX_CONTROL_H__
#define __MUTEX_CONTROL_H__
/* Request ids for mutex_control syscall */
#if defined (__KERNEL__)
#define MUTEX_CONTROL_LOCK L4_MUTEX_LOCK
#define MUTEX_CONTROL_UNLOCK L4_MUTEX_UNLOCK
#endif
#define L4_MUTEX_LOCK 0
#define L4_MUTEX_UNLOCK 1
#endif /* __MUTEX_CONTROL_H__*/

4
include/l4/api/syscall.h
View File

@@ -23,7 +23,8 @@
#define sys_kread_offset 0x28
#define sys_kmem_control_offset 0x2C
#define sys_time_offset 0x30
#define syscalls_end_offset sys_time_offset
#define sys_mutex_control_offset 0x34
#define syscalls_end_offset sys_mutex_control_offset
#define SYSCALLS_TOTAL ((syscalls_end_offset >> 2) + 1)
void print_syscall_context(struct ktcb *t);
@@ -41,5 +42,6 @@ int sys_getid(struct syscall_context *);
int sys_kread(struct syscall_context *);
int sys_kmem_control(struct syscall_context *);
int sys_time(struct syscall_context *);
int sys_mutex_control(struct syscall_context *);
#endif /* __SYSCALL_H__ */

7
include/l4/glue/arm/memlayout.h
View File

@@ -65,9 +65,12 @@
#define virt_to_phys(addr) ((unsigned int)(addr) - KERNEL_OFFSET)
#endif
#define PAGER_ADDR(x) ((x >= INITTASK_AREA_START) && (x < INITTASK_AREA_END))
#define KERN_ADDR(x) ((x >= KERNEL_AREA_START) && (x < KERNEL_AREA_END))
#define USER_ADDR(x) ((x >= USER_AREA_START) && (x < USER_AREA_END))
#define UTCB_ADDR(x) ((x >= UTCB_AREA_START) && (x < UTCB_AREA_END))
#define SHM_ADDR(x) ((x >= SHM_AREA_START) && (x < SHM_AREA_END))
#define USER_ADDR(x) (((x >= USER_AREA_START) && (x < USER_AREA_END)) || \
UTCB_ADDR(x) || SHM_ADDR(x) || PAGER_ADDR(x))
#define PRIVILEGED_ADDR(x) (KERN_ADDR(x) || (x >= ARM_HIGH_VECTOR) || \
(x >= IO_AREA_START && x < IO_AREA_END))

4
include/l4/lib/wait.h
View File

@@ -10,6 +10,8 @@ struct waitqueue {
struct ktcb *task;
};
#define WAKEUP_ASYNC 0
enum wakeup_flags {
WAKEUP_INTERRUPT = (1 << 0),
WAKEUP_SYNC = (1 << 1)
@@ -74,5 +76,7 @@ void wake_up(struct waitqueue_head *wqh, unsigned int flags);
int wake_up_task(struct ktcb *task, unsigned int flags);
void wake_up_all(struct waitqueue_head *wqh, unsigned int flags);
int wait_on(struct waitqueue_head *wqh);
#endif /* __LIB_WAIT_H__ */