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[/] [c0or1k/] [trunk/] [src/] [glue/] [arm/] [systable.c] - Rev 5
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/* * System Calls * * Copyright (C) 2007 Bahadir Balban */ #include <l4/lib/mutex.h> #include <l4/lib/printk.h> #include <l4/generic/space.h> #include <l4/generic/scheduler.h> #include <l4/generic/debug.h> #include <l4/generic/tcb.h> #include <l4/api/errno.h> #include INC_GLUE(memlayout.h) #include INC_GLUE(syscall.h) #include INC_GLUE(mapping.h) #include INC_GLUE(debug.h) #include INC_SUBARCH(mm.h) #include INC_SUBARCH(perfmon.h) #include INC_API(syscall.h) #include INC_API(kip.h) void kip_init_syscalls(void) { kip.irq_control = ARM_SYSCALL_PAGE + sys_irq_control_offset; kip.thread_control = ARM_SYSCALL_PAGE + sys_thread_control_offset; kip.ipc_control = ARM_SYSCALL_PAGE + sys_ipc_control_offset; kip.map = ARM_SYSCALL_PAGE + sys_map_offset; kip.ipc = ARM_SYSCALL_PAGE + sys_ipc_offset; kip.capability_control = ARM_SYSCALL_PAGE + sys_capability_control_offset; kip.unmap = ARM_SYSCALL_PAGE + sys_unmap_offset; kip.exchange_registers = ARM_SYSCALL_PAGE + sys_exchange_registers_offset; kip.thread_switch = ARM_SYSCALL_PAGE + sys_thread_switch_offset; kip.schedule = ARM_SYSCALL_PAGE + sys_schedule_offset; kip.getid = ARM_SYSCALL_PAGE + sys_getid_offset; kip.container_control = ARM_SYSCALL_PAGE + sys_container_control_offset; kip.time = ARM_SYSCALL_PAGE + sys_time_offset; kip.mutex_control = ARM_SYSCALL_PAGE + sys_mutex_control_offset; kip.cache_control = ARM_SYSCALL_PAGE + sys_cache_control_offset; } /* Jump table for all system calls. */ syscall_fn_t syscall_table[SYSCALLS_TOTAL]; int arch_sys_ipc(syscall_context_t *regs) { return sys_ipc((l4id_t)regs->r0, (l4id_t)regs->r1, (unsigned int)regs->r2); } int arch_sys_thread_switch(syscall_context_t *regs) { return sys_thread_switch(); } int arch_sys_thread_control(syscall_context_t *regs) { return sys_thread_control((unsigned int)regs->r0, (struct task_ids *)regs->r1); } int arch_sys_exchange_registers(syscall_context_t *regs) { return sys_exchange_registers((struct exregs_data *)regs->r0, (l4id_t)regs->r1); } int arch_sys_schedule(syscall_context_t *regs) { return sys_schedule(); } int arch_sys_getid(syscall_context_t *regs) { return sys_getid((struct task_ids *)regs->r0); } int arch_sys_unmap(syscall_context_t *regs) { return sys_unmap((unsigned long)regs->r0, (unsigned long)regs->r1, (unsigned int)regs->r2); } int arch_sys_irq_control(syscall_context_t *regs) { return sys_irq_control((unsigned int)regs->r0, (unsigned int)regs->r1, (l4id_t)regs->r2); } int arch_sys_ipc_control(syscall_context_t *regs) { return sys_ipc_control(); } int arch_sys_map(syscall_context_t *regs) { return sys_map((unsigned long)regs->r0, (unsigned long)regs->r1, (unsigned long)regs->r2, (unsigned long)regs->r3, (l4id_t)regs->r4); } int arch_sys_capability_control(syscall_context_t *regs) { return sys_capability_control((unsigned int)regs->r0, (unsigned int)regs->r1, (void *)regs->r2); } int arch_sys_container_control(syscall_context_t *regs) { return sys_container_control((unsigned int)regs->r0, (unsigned int)regs->r1, (void *)regs->r2); } int arch_sys_time(syscall_context_t *regs) { return sys_time((struct timeval *)regs->r0, (int)regs->r1); } int arch_sys_mutex_control(syscall_context_t *regs) { return sys_mutex_control((unsigned long)regs->r0, (int)regs->r1); } int arch_sys_cache_control(syscall_context_t *regs) { return sys_cache_control((unsigned long)regs->r0, (unsigned long)regs->r1, (unsigned int)regs->r2); } /* * Initialises the system call jump table, for kernel to use. * Also maps the system call page into userspace. */ void syscall_init() { syscall_table[sys_ipc_offset >> 2] = (syscall_fn_t)arch_sys_ipc; syscall_table[sys_thread_switch_offset >> 2] = (syscall_fn_t)arch_sys_thread_switch; syscall_table[sys_thread_control_offset >> 2] = (syscall_fn_t)arch_sys_thread_control; syscall_table[sys_exchange_registers_offset >> 2] = (syscall_fn_t)arch_sys_exchange_registers; syscall_table[sys_schedule_offset >> 2] = (syscall_fn_t)arch_sys_schedule; syscall_table[sys_getid_offset >> 2] = (syscall_fn_t)arch_sys_getid; syscall_table[sys_unmap_offset >> 2] = (syscall_fn_t)arch_sys_unmap; syscall_table[sys_irq_control_offset >> 2] = (syscall_fn_t)arch_sys_irq_control; syscall_table[sys_ipc_control_offset >> 2] = (syscall_fn_t)arch_sys_ipc_control; syscall_table[sys_map_offset >> 2] = (syscall_fn_t)arch_sys_map; syscall_table[sys_capability_control_offset >> 2] = (syscall_fn_t)arch_sys_capability_control; syscall_table[sys_container_control_offset >> 2] = (syscall_fn_t)arch_sys_container_control; syscall_table[sys_time_offset >> 2] = (syscall_fn_t)arch_sys_time; syscall_table[sys_mutex_control_offset >> 2] = (syscall_fn_t)arch_sys_mutex_control; syscall_table[sys_cache_control_offset >> 2] = (syscall_fn_t)arch_sys_cache_control; add_boot_mapping(virt_to_phys(&__syscall_page_start), ARM_SYSCALL_PAGE, PAGE_SIZE, MAP_USR_RX); } /* Checks a syscall is legitimate and dispatches to appropriate handler. */ int syscall(syscall_context_t *regs, unsigned long swi_addr) { int ret = 0; /* Check if genuine system call, coming from the syscall page */ if ((swi_addr & ARM_SYSCALL_PAGE) == ARM_SYSCALL_PAGE) { /* Check within syscall offset boundary */ if (((swi_addr & syscall_offset_mask) >= 0) && ((swi_addr & syscall_offset_mask) <= syscalls_end_offset)) { /* Do system call accounting, if enabled */ system_account_syscall(); system_account_syscall_type(swi_addr); /* Start measure syscall timing, if enabled */ system_measure_syscall_start(); /* Quick jump, rather than compare each */ ret = (*syscall_table[(swi_addr & 0xFF) >> 2])(regs); /* End measure syscall timing, if enabled */ system_measure_syscall_end(swi_addr); } else { printk("System call received from call @ 0x%lx." "Instruction: 0x%lx.\n", swi_addr, *((unsigned long *)swi_addr)); return -ENOSYS; } } else { printk("System call exception from unknown location 0x%lx." "Discarding.\n", swi_addr); return -ENOSYS; } if (current->flags & TASK_SUSPENDING) { BUG_ON(current->nlocks); sched_suspend_sync(); } return ret; }
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