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Kernel updates since December 2009

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This commit is contained in:
Bahadir Balban
2010-03-25 01:12:40 +02:00
parent 16818191b3
commit 74b5963fcb
487 changed files with 22477 additions and 3857 deletions
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100
include/l4/arch/arm/exception.h
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@@ -1,78 +1,57 @@
/*
* Definitions for exception support on ARM
* Common definitions for exceptions
* across ARM sub-architectures.
*
* Copyright (C) 2007 Bahadir Balban
* Copyright (C) 2010 B Labs Ltd.
*/
#ifndef __ARCH_EXCEPTIONS_H__
#define __ARCH_EXCEPTIONS_H__
#ifndef __EXCEPTION_H__
#define __EXCEPTION_H__
#include INC_SUBARCH(exception.h)
#include INC_ARCH(asm.h)
static inline void enable_irqs()
{
__asm__ __volatile__(
"mrs r0, cpsr_fc\n"
"bic r0, r0, #0x80\n" /* ARM_IRQ_BIT */
"msr cpsr_fc, r0\n"
);
}
static inline void disable_irqs()
{
__asm__ __volatile__(
"mrs r0, cpsr_fc\n"
"orr r0, r0, #0x80\n" /* ARM_IRQ_BIT */
"msr cpsr_fc, r0\n"
);
}
int irqs_enabled();
/* Disable the irqs unconditionally, but also keep the previous state such that
* if it was already disabled before the call, the restore call would retain
* this state. */
void irq_local_disable_save(unsigned long *state);
#if 0
{
unsigned long temp;
__asm__ __volatile__ (
"mrs %0, cpsr_fc\n"
"orr %2, %0, #0x80\n"
"msr cpsr_fc, %2\n"
: "=r" (*state)
: "r" (*state),"r" (temp)
);
}
/* Abort debugging conditions */
//#define DEBUG_ABORTS
#if defined (DEBUG_ABORTS)
#define dbg_abort(...) printk(__VA_ARGS__)
#else
#define dbg_abort(...)
#endif
/* Simply change it back to original state supplied in @flags. This might enable
* or retain disabled state of the irqs for example. Useful for nested calls. */
void irq_local_restore(unsigned long state);
/* Codezero-specific abort type */
#define ABORT_TYPE_PREFETCH 1
#define ABORT_TYPE_DATA 0
static inline void irq_local_enable()
{
enable_irqs();
}
/* If abort is handled and resolved in check_aborts */
#define ABORT_HANDLED 1
/* Codezero makes use of bit 8 (Always Zero) of FSR to define which type of abort */
#define set_abort_type(fsr, x) { fsr &= ~(1 << 8); fsr |= ((x & 1) << 8); }
#define is_prefetch_abort(fsr) ((fsr >> 8) & 0x1)
#define is_data_abort(fsr) (!is_prefetch_abort(fsr))
/* Kernel's data about the fault */
typedef struct fault_kdata {
u32 faulty_pc; /* In DABT: Aborting PC, In PABT: Same as FAR */
u32 fsr; /* In DABT: DFSR, In PABT: IFSR */
u32 far; /* In DABT: DFAR, in PABT: IFAR */
pte_t pte; /* Faulty page table entry */
} __attribute__ ((__packed__)) fault_kdata_t;
static inline void irq_local_disable()
{
disable_irqs();
}
/* This is filled on entry to irq handler, only if a process was interrupted.*/
extern unsigned int preempted_psr;
/*
* FIXME: TASK_IN_KERNEL works for non-current tasks, in_kernel() works for current task?
* in_kernel() is for irq, since normally in process context you know if you are in kernel or not :-)
*/
/* Implementing these as functions cause circular include dependency for tcb.h */
#define TASK_IN_KERNEL(tcb) (((tcb)->context.spsr & ARM_MODE_MASK) == ARM_MODE_SVC)
#define TASK_IN_USER(tcb) (!TASK_IN_KERNEL(tcb))
static inline int is_user_mode(u32 spsr)
{
return ((spsr & ARM_MODE_MASK) == ARM_MODE_USR);
}
static inline int in_kernel()
{
return (((preempted_psr & ARM_MODE_MASK) == ARM_MODE_SVC)) ? 1 : 0;
@@ -86,4 +65,9 @@ static inline int in_user()
int pager_pagein_request(unsigned long vaddr, unsigned long size,
unsigned int flags);
#endif
int fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far, u32 ipc_tag);
int is_kernel_abort(u32 faulted_pc, u32 fsr, u32 far, u32 spsr);
int check_abort_type(u32 faulted_pc, u32 fsr, u32 far, u32 spsr);
#endif /* __EXCEPTION_H__ */